NCP1450ASN50T1G中文资料应用文章市场行情现货热卖使用介绍-中国IC网-芯三七

NCP1450A

PWM Step−up DC−DC

Controller

The NCP1450A series are PWM step−up DC−DC switching

controller that are specially designed for powering portable equipment

from one or two cells battery packs. The NCP1450A series have a

driver pin, EXT pin, for connecting to an external transistor. Large

output currents can be obtained by connecting a low ON−resistance

external power transistor to the EXT pin. The device will

automatically skip switching cycles under light load condition to

maintain high efficiency at light loads. With only six external

components, this series allows a simple means to implement highly

efficient converter for large output current applications.

Each device consists of an on−chip Pulse Width Modulation (PWM)

oscillator, PWM controller, phase−compensated error amplifier,

soft−start, voltage reference, and driver for driving external power

transistor. Additionally, a chip enable feature is provided to power

down the converter for extended battery life.

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5

1

TSOP−5

SN SUFFIX

CASE 483

MARKING DIAGRAM AND

PIN CONNECTIONS

The NCP1450A device series are available in the TSOP−5 package

with five standard regulated output voltages. Additional voltages that

range from 1.8 V to 5.0 V in 100 mV steps can be manufactured.

1

2

3

5

CE

OUT

NC

EXT

Features

• High Efficiency 86% at I = 200 mA, V = 2.0 V, V

= 3.0 V

= 5.0 V

O

IN

OUT

GND

4

88% at I = 400 mA, V = 3.0 V, V

O

IN

OUT

• Low Startup Voltage of 0.9 V typical at I = 1.0 mA

O

(Top View)

xxx =Specific Device Marking

• Operation Down to 0.6 V

• Five Standard Voltages: 1.9 V, 2.7 V, 3.0 V, 3.3 V, 5.0 V with High

Accuracy 2.5%

A

Y

W

G

= Assembly Location

= Year

= Work Week

• Low Conversion Ripple

= Pb−Free Package

• High Output Current up to 1000 mA

(Note: Microdot may be in either location)

(3.0 V version at V = 2.0 V, L = 10 ꢀ H, C

= 220 ꢀ F)

IN

OUT

• Fixed Frequency Pulse Width Modulation (PWM) at 180 kHz

• Chip Enable Pin with On−chip 150 nA Pullup Current Source

• Low Profile and Micro Miniature TSOP−5 Package

• Pb−Free Packages are Available

ORDERING INFORMATION

See detailed ordering and shipping information in the ordering

information section on page 3 of this data sheet.

Typical Applications

• Personal Digital Assistant (PDA)

• Electronic Games

• Portable Audio (MP3)

• Digital Still Cameras

• Handheld Instruments

1

Publication Order Number:

December, 2005 − Rev. 7

NCP1450A/D

NCP1450A

V

IN

V

OUT

CE

1

EXT

5

OUT

2

NC

3

GND

4

Figure 1. Typical Step−up Converter Application

OUT

2

Error

Amplifier

EXT

5

PWM

Controller

+

−

Driver

NC

3

Phase

Compensation

180 kHz

Oscillator

Voltage

Reference

Soft−Start

GND

4

1 CE

Figure 2. Representative Block Diagram

PIN FUNCTION DESCRIPTION

Pin #

Symbol

Pin Description

1

CE

Chip Enable Pin

(1) The chip is enabled if a voltage equal to or greater than 0.9 V is applied.

(2) The chip is disabled if a voltage less than 0.3 V is applied.

(3) The chip is enabled if this pin is left floating.

2

3

4

5

OUT

NC

Output voltage monitor pin and also the power supply pin for the device.

No internal connection to this pin.

Ground pin.

GND

EXT

External transistor drive pin.

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2

NCP1450A

ORDERING INFORMATION (Note 1)

Output

Voltage

Switching

Frequency

†

Device

Marking

Package

Shipping

NCP1450ASN19T1

TSOP−5

1.9 V

DAY

TSOP−5

(Pb−Free)

NCP1450ASN19T1G

NCP1450ASN27T1G

NCP1450ASN27T1

NCP1450ASN30T1

NCP1450ASN30T1G

NCP1450ASN33T1

NCP1450ASN33T1G

NCP1450ASN50T1

NCP1450ASN50T1G

TSOP−5

2.7 V

3.0 V

3.3 V

5.0 V

DAZ

DBA

DBC

DBD

TSOP−5

(Pb−Free)

TSOP−5

3000 Units

on 7 Inch Reel

180 KHz

TSOP−5

(Pb−Free)

TSOP−5

(Pb−Free)

TSOP−5

(Pb−Free)

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

1. The ordering information lists five standard output voltage device options. Additional devices with output voltage ranging from

1.8 V to 5.0 V in 100 mV increments can be manufactured. Contact your ON Semiconductor representative for availability.

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Power Supply Voltage (Pin 2)

V

OUT

6.0

V

Input/Output Pins

EXT (Pin 5)

EXT Sink/Source Current

V

I

−0.3 to 6.0

−150 to 150

V

mA

EXT

CE (Pin 1)

Input Voltage Range

Input Current Range

V

I

−0.3 to 6.0

−150 to 150

V

mA

CE

Power Dissipation and Thermal Characteristics

Maximum Power Dissipation @ T = 25°C

P

500

250

mW

°C/W

A

D

Thermal Resistance Junction−to−Air

Operating Ambient Temperature Range

Operating Junction Temperature Range

Storage Temperature Range

R

ꢁ

JA

T

A

−40 to +85

−40 to +150

−55 to +150

°C

T

J

T

stg

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit

values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,

damage may occur and reliability may be affected.

2. This device series contains ESD protection and exceeds the following tests:

Human Body Model (HBM) $2.0 kV per JEDEC standard: JESD22−A114.

Machine Model (MM) $200 V per JEDEC standard: JESD22−A115.

3. Latchup Current Maximum Rating: $150 mA per JEDEC standard: JESD78.

4. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.

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3

NCP1450A

ELECTRICAL CHARACTERISTICS (For all values T = 25°C, unless otherwise noted.)

A

Characteristic

Symbol

Min

Typ

Max

Unit

OSCILLATOR

Frequency (V

= V

0.96, Note 5)

f

144

−

180

0.11

80

216

−

kHz

%/°C

%

OUT

SET

OSC

Frequency Temperature Coefficient (T = −40°C to 85°C)

ꢂ f

A

Maximum PWM Duty Cycle (V

= V

0.96)

D

MAX

70

−

90

0.9

−

OUT

SET

Minimum Startup Voltage (I = 0 mA)

V

0.8

V

O

start

Minimum Startup Voltage Temperature Coefficient (T = −40°C to 85°C)

ꢂ V

−

−1.6

0.6

mV/°C

V

A

start

Minimum Operation Hold Voltage (I = 0 mA)

V

−

0.7

250

O

hold

Soft−Start Time (V

= V

Note 6)

t

SS

−

100

ms

OUT

SET,

CE (PIN 1)

CE Input Voltage (V

= V

0.96)

V

OUT

SET

High State, Device Enabled

Low State, Device Disabled

V

0.9

−

0.3

CE(high)

CE(low)

CE Input Current (Note 6)

ꢀ

A

High State, Device Enabled (V

Low State, Device Disabled (V

= V = 5.0 V)

I

−0.5

0

0.15

0.5

OUT

CE

CE(high)

= 5.0 V, V = 0 V)

CE

CE(low)

EXT (PIN 5)

EXT “H” Output Current (V

Device Suffix:

19T1

= V

−0.4 V)

I

EXTH

mA

EXT

OUT

−

−25.0

−35.0

−37.7

−40.0

−53.7

−20.0

−30.0

−35.0

27T1

30T1

33T1

50T1

EXT “L” Output Current(V

= 0.4 V)

I

EXTL

EXT

Device Suffix:

19T1

27T1

30T1

33T1

20.0

30.0

35.0

38.3

48.0

50.8

52.0

58.2

−

50T1

TOTAL DEVICE

Output Voltage

Device Suffix:

19T1

V

OUT

V

1.853

2.633

2.925

3.218

4.875

1.9

2.7

3.0

3.3

5.0

1.948

2.768

3.075

3.383

5.125

27T1

30T1

33T1

50T1

Output Voltage Temperature Coefficient (T = −40 to +85°C)

ꢂ

V

−

150

−

ppm/°C

ꢀ A

A

OUT

Operating Current (V

= V = V 0.96, Note 5)

SET

I

OUT

CE

DD

Device Suffix:

19T1

27T1

30T1

33T1

−

55

93

98

103

136

90

140

150

160

220

50T1

Standby Current (V

= V = V

+0.5 V)

I

−

15

20

ꢀ A

OUT

CE

SET

STB

Off−State Current (V

= 5.0 V, V = 0 V, T = −40 to +85°C, Note 7)

0.6

1.5

OUT

CE

A

OFF

5. V

means setting of output voltage.

SET

6. This parameter is guaranteed by design.

7. CE pin is integrated with an internal 150 nA pullup current source.

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4

NCP1450A

2.1

2.0

1.9

1.8

1.7

1.6

3.2

3.1

3.0

2.9

V

= 2.5 V

= 2.0 V

IN

V

= 0.9 V

V

= 1.2 V

V

= 1.5 V

V

= 0.9 V

V

IN

= 1.2 V

V

IN

= 1.5 V

IN

NCP1450ASN19T1

L = 10 ꢀ H

Q = NTGS3446T1

NCP1450ASN30T1

L = 10 ꢀ H

Q = NTGS3446T1

= 220 ꢀ F

OUT

T = 25°C

A

2.8

2.7

C

= 220 ꢀ F

C

OUT

T = 25°C

A

0

200

400

600

800

1000

0

200

400

600

800

1000

I , OUTPUT CURRENT (mA)

O

I , OUTPUT CURRENT (mA)

O

Figure 3. NCP1450ASN19T1 Output Voltage

vs. Output Current

Figure 4. NCP1450ASN30T1 Output Voltage

vs. Output Current

5.2

5.1

5.0

4.9

4.8

4.7

100

80

60

40

20

0

V

IN

= 1.5 V

V

= 4.5 V

= 4.0 V

IN

V

= 1.2 V

V

IN

= 2.0 V

V

= 1.2 V

IN

V

= 0.9 V

V

IN

= 2.5 V

V

= 3.0 V

V

= 1.5 V

IN

NCP1450ASN50T1

L = 10 ꢀ H

Q = NTGS3446T1

NCP1450ASN19T1

L = 10 ꢀ H

Q = NTGS3446T1

= 220 ꢀ F

OUT

T = 25°C

A

V

IN

= 0.9 V

C

= 220 ꢀ F

C

OUT

T = 25°C

A

0

200

400

600

800

0.01

0.1

1

10

100

1000

I , OUTPUT CURRENT (mA)

O

I , OUTPUT CURRENT (mA)

O

Figure 5. NCP1450ASN50T1 Output Voltage

vs. Output Current

Figure 6. NCP1450ASN19T1 Efficiency vs.

Output Current

100

80

60

40

20

0

100

V

= 4.0 V

= 3.0 V

= 2.5 V

= 2.0 V

V

IN

= 4.5 V

IN

V

IN

= 2.5 V

V

= 2.0 V

IN

80

60

40

20

0

V

= 1.5 V

IN

V

IN

= 1.2 V

V

= 1.5 V

V

IN

= 0.9 V

IN

NCP1450ASN30T1

L = 10 ꢀ H

Q = NTGS3446T1

NCP1450ASN50T1

L = 10 ꢀ H

Q = NTGS3446T1

= 220 ꢀ F

OUT

T = 25°C

A

V

= 1.2 V

IN

C

= 220 ꢀ F

C

OUT

V

IN

= 0.9 V

1

T = 25°C

A

0.01

0.1

10

100

0.01

0.1

1

10

100

1000

I , OUTPUT CURRENT (mA)

O

I , OUTPUT CURRENT (mA)

O

Figure 7. NCP1450ASN30T1 Efficiency vs.

Output Current

Figure 8. NCP1450ASN50T1 Efficiency vs.

Output Current

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5

NCP1450A

2.1

2.0

1.9

1.8

1.7

1.6

3.2

3.1

3.0

2.9

2.8

2.7

NCP1450ASN19T1

L = 22 ꢀ H

NCP1450ASN30T1

L = 22 ꢀ H

I = 0 mA

O

I

O

= 0 mA

V

IN

= 1.2 V

V

IN

= 1.2 V

−50

−25

0

25

50

75

100

−50

−25

0

25

50

75

100

TEMPERATURE (°C)

Figure 9. NCP1450ASN19T1 Output Voltage

vs. Temperature

Figure 10. NCP1450ASN30T1 Output Voltage

vs. Temperature

5.2

5.1

5.0

4.9

4.8

4.7

100

80

60

40

20

0

NCP1450ASN50T1

L = 22 ꢀ H

NCP1450ASN19T1

V

OUT

= 1.9 V x 0.96

I

O

= 0 mA

Open−Loop Test

V

IN

= 1.2 V

−50

−25

0

25

50

75

−50

−25

0

25

50

75

TEMPERATURE (°C)

Figure 11. NCP1450ASN50T1 Output Voltage

vs. Temperature

Figure 12. NCP1450ASN19T1 Operating

Current vs. Temperature

140

120

100

80

200

180

160

140

120

100

NCP1450ASN30T1

NCP1450ASN50T1

60

V

OUT

= 3.0 V x 0.96

V

OUT

= 5.0 V x 0.96

Open−Loop Test

−25

40

−50

−25

0

25

50

75

−50

0

25

50

75

TEMPERATURE (°C)

Figure 13. NCP1450ASN30T1 Operating

Current vs. Temperature

Figure 14. NCP1450ASN50T1 Operating

Current vs. Temperature

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NCP1450A

25

20

15

10

5

25

20

15

10

5

NCP1450ASN19T1

= 1.9 V + 0.5 V

NCP1450ASN30T1

V = 3.0 V + 0.5 V

OUT

V

OUT

Open−Loop Test

0

−50

−25

0

25

50

75

100

−50

−25

0

25

50

75

100

TEMPERATURE (°C)

Figure 15. NCP1450ASN19T1 Standby Current

vs. Temperature

Figure 16. NCP1450ASN30T1 Standby Current

vs. Temperature

25

20

15

10

5

1.0

0.8

0.6

0.4

0.2

0.0

NCP1450ASN19T1

V

= 5.0 V

= 0 V

Open−Loop Test

OUT

CE

NCP1450ASN50T1

V

= 5.0 V + 0.5 V

OUT

Open−Loop Test

0

−50

−25

0

25

50

75

−50

−25

0

25

50

75

100

TEMPERATURE (°C)

Figure 17. NCP1450ASN50T1 Standby Current

vs. Temperature

Figure 18. NCP1450ASN19T1 Off−State Current

vs. Temperature

1.0

0.8

0.6

0.4

0.2

0.0

1.2

1.0

0.8

0.6

0.4

0.2

NCP1450ASN30T1

NCP1450ASN50T1

= 5.0 V

OUT

= 0 V

CE

Open−Loop Test

V

= 5.0 V

= 0 V

Open−Loop Test

V

OUT

CE

−50

−25

0

25

50

75

−50

−25

0

25

50

75

100

TEMPERATURE (°C)

Figure 19. NCP1450ASN30T1 Off−State Current

vs. Temperature

Figure 20. NCP1450ASN50T1 Off−State Current

vs. Temperature

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NCP1450A

300

250

200

150

100

50

300

250

200

150

100

50

NCP1450ASN19T1

= 1.9 V x 0.96

NCP1450ASN30T1

V = 3.0 V x 0.96

OUT

V

OUT

Open−Loop Test

0

−50

−25

0

25

50

75

100

−50

−25

0

25

50

75

100

TEMPERATURE (°C)

Figure 21. NCP1450ASN19T1 Oscillator

Frequency vs. Temperature

Figure 22. NCP1450ASN30T1 Oscillator

Frequency vs. Temperature

300

250

200

150

100

50

100

90

80

70

60

50

NCP1450ASN50T1

= 5.0 V x 0.96

Open−Loop Test

NCP1450ASN19T1

V

= 1.9 V x 0.96

OUT

Open−Loop Test

0

−50

40

−50

−25

0

25

50

75

−25

0

25

50

75

TEMPERATURE (°C)

Figure 23. NCP1450ASN50T1 Oscillator

Frequency vs. Temperature

Figure 24. NCP1450ASN19T1 Maximum Duty

Cycle vs. Temperature

100

90

100

90

80

70

60

50

60

50

NCP1450ASN30T1

= 3.0 V x 0.96

Open−Loop Test

NCP1450ASN50T1

V

OUT

V

= 5.0 V x 0.96

OUT

Open−Loop Test

40

−50

40

−50

−25

0

25

50

75

−25

0

25

50

75

TEMPERATURE (°C)

Figure 25. NCP1450ASN30T1 Maximum Duty

Cycle vs. Temperature

Figure 26. NCP1450ASN50T1 Maximum Duty

Cycle vs. Temperature

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8

NCP1450A

0

−10

−20

−30

−40

−50

−20

−30

−40

−50

−60

−70

NCP1450ASN19T1

NCP1450ASN30T1

V

= 1.9 V x 0.96

V

= 3.0 V x 0.96

OUT

= V

− 0.4 V

= V

− 0.4 V

EXT

OUT

EXT

OUT

Open−Loop Test

−50

−25

0

25

50

75

100

−50

−25

0

25

50

75

100

TEMPERATURE (°C)

Figure 27. NCP1450ASN19T1 EXT “H” Output

Current vs. Temperature

Figure 28. NCP1450ASN30T1 EXT “H” Output

Current vs. Temperature

−40

−50

−60

−70

−80

−90

50

40

30

20

10

0

NCP1450ASN50T1

NCP1450ASN19T1

V

= 5.0 V x 0.96

V

= 1.9 V x 0.96

= 0.4 V

OUT

= V

− 0.4 V

EXT

OUT

EXT

Open−Loop Test

−50

−25

0

25

50

75

−50

−25

0

25

50

75

TEMPERATURE (°C)

Figure 29. NCP1450ASN50T1 EXT “H” Output

Current vs. Temperature

Figure 30. NCP1450ASN19T1 EXT “L” Output

Current vs. Temperature

80

70

60

50

40

30

90

80

70

60

NCP1450ASN30T1

NCP1450ASN50T1

V

= 3.0 V x 0.96

= 0.4 V

V

= 5.0 V x 0.96

= 0.4 V

OUT

50

40

EXT

Open−Loop Test

−50

−25

0

25

50

75

−50

−25

0

25

50

75

TEMPERATURE (°C)

Figure 31. NCP1450ASN30T1 EXT “L” Output

Current vs. Temperature

Figure 32. NCP1450ASN50T1 EXT “L” Output

Current vs. Temperature

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9

NCP1450A

25

20

15

10

5

25

20

15

10

5

NCP1450ASN19T1

NCP1450ASN30T1

V

= 1.9 V x 0.96

OUT

V

= 3.0 V x 0.96

OUT

= V

− 0.4 V

EXT

OUT

= V

− 0.4 V

EXT

OUT

Open−Loop Test

0

−50

−25

0

25

50

75

100

−50

−25

0

25

50

75

100

TEMPERATURE (°C)

Figure 33. NCP1450ASN19T1 EXT “H”

ON−Resistance vs. Temperature

Figure 34. NCP1450ASN30T1 EXT “H”

ON−Resistance vs. Temperature

25

20

15

10

5

25

20

15

10

5

NCP1450ASN50T1

NCP1450ASN19T1

V

= 5.0 V x 0.96

V

= 1.9 V x 0.96

= 0.4 V

OUT

= V

− 0.4 V

EXT

OUT

EXT

Open−Loop Test

0

−50

0

−50

−25

0

25

50

75

−25

0

25

50

75

TEMPERATURE (°C)

Figure 35. NCP1450ASN50T1 EXT “H”

ON−Resistance vs. Temperature

Figure 36. NCP1450ASN19T1 EXT “L”

ON−Resistance vs. Temperature

25

20

15

10

5

25

20

15

10

5

NCP1450ASN30T1

NCP1450ASN50T1

V

= 3.0 V x 0.96

= 0.4 V

V

= 5.0 V x 0.96

= 0.4 V

OUT

EXT

Open−Loop Test

0

−50

0

−50

−25

0

25

50

75

−25

0

25

50

75

TEMPERATURE (°C)

Figure 37. NCP1450ASN30T1 EXT “L”

ON−Resistance vs. Temperature

Figure 38. NCP1450ASN50T1 EXT “L”

ON−Resistance vs. Temperature

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10

NCP1450A

1.0

0.8

0.6

0.4

0.2

0.0

1.0

0.8

0.6

0.4

0.2

0.0

V

start

V

start

NCP1450ASN30T1

L = 22 ꢀ H

NCP1450ASN19T1

L = 22 ꢀ H

C

I

= 0.1 ꢀ F

= 0 mA

OUT

C

= 0.1 ꢀ F

O

OUT

I

O

= 0 mA

hold

−50

−25

0

25

50

75

100

−50

−25

0

25

50

75

100

TEMPERATURE (°C)

Figure 39. NCP1450ASN19T1 Startup/Hold

Voltage vs. Temperature

Figure 40. NCP1450ASN30T1 Startup/Hold

Voltage vs. Temperature

1.0

0.8

0.6

0.4

0.2

0.0

200

180

160

140

120

100

80

NCP1450ASN19T1

L = 10 ꢀ H

Q = NTGS3446T1

V

start

hold

C

= 220 ꢀ F

OUT

V

= 1.5 V

IN

T = 25°C

A

V

IN

= 1.2 V

V

IN

= 0.9 V

60

NCP1450ASN50T1

L = 22 ꢀ H

40

C

= 0.1 ꢀ F

OUT

20

I

O

= 0 mA

0

−50

−25

0

25

50

75

100

0

200

400

600

800

1000

TEMPERATURE (°C)

I , OUTPUT CURRENT (mA)

O

Figure 41. NCP1450ASN50T1 Startup/Hold

Voltage vs. Temperature

Figure 42. NCP1450ASN19T1 Ripple Voltage

vs. Output Current

200

180

160

140

120

100

80

200

180

160

140

120

100

80

NCP1450ASN30T1

L = 10 ꢀ H

Q = NTGS3446T1

NCP1450ASN50T1

L = 10 ꢀ H

Q = NTGS3446T1

V

= 2.0 V

IN

V

IN

= 1.5 V

V

IN

= 1.2 V

C

= 220 ꢀ F

OUT

V

IN

= 2.5 V

C

= 220 ꢀ F

OUT

V

IN

= 0.9 V

T = 25°C

A

T = 25°C

A

V

IN

= 1.2 V

V

IN

= 3.0 V

V

IN

= 0.9 V

V

IN

= 1.5 V

V

IN

= 2.5 V

60

V

IN

= 4.5 V

40

V

IN

= 2.0 V

V

IN

= 4.0 V

20

0

200

400

600

800

1000

0

200

400

600

800

1000

I , OUTPUT CURRENT (mA)

O

I , OUTPUT CURRENT (mA)

O

Figure 43. NCP1450ASN30T1 Ripple Voltage

vs. Output Current

Figure 44. NCP1450ASN50T1 Ripple Voltage

vs. Output Current

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11

NCP1450A

2.0

1.6

1.2

0.8

0.4

0.0

2.0

1.6

NCP1450ASN19T1

L = 10 ꢀ H

Q = MMJT9410

V

start

V

start

C

= 220 ꢀ F

OUT

NCP1450ASN19T1

L = 10 ꢀ H

Q = NTGS3446T1

T = 25°C

A

1.2

0.8

0.4

0.0

C

= 220 ꢀ F

OUT

T = 25°C

A

hold

V

hold

0

20

40

60

80

100

0

20

40

60

80

100

I , OUTPUT CURRENT (mA)

O

Figure 45. NCP1450ASN19T1 Startup/Hold

Voltage vs. Output Current (Using MOSFET)

Figure 46. NCP1450ASN19T1 Startup/Hold

Voltage vs. Output Current (Using BJT)

2.0

1.6

1.2

0.8

0.4

0.0

2.0

1.6

1.2

0.8

0.4

0.0

V

start

V

start

NCP1450ASN30T1

L = 10 ꢀ H

Q = NTGS3446T1

C

= 220 ꢀ F

OUT

hold

T = 25°C

A

NCP1450ASN30T1

L = 10 ꢀ H

Q = MMJT9410

= 220 ꢀ F

T = 25°C

V

hold

C

OUT

A

20

40

60

80

20

40

60

80

I , OUTPUT CURRENT (mA)

O

Figure 47. NCP1450ASN30T1 Startup/Hold

Voltage vs. Output Current (Using MOSFET)

Figure 48. NCP1450ASN30T1 Startup/Hold

Voltage vs. Output Current (Using BJT)

2.0

1.6

1.2

0.8

0.4

0.0

2.0

1.6

1.2

0.8

0.4

0.0

V

start

hold

NCP1450ASN50T1

L = 10 ꢀ H

Q = NTGS3446T1

NCP1450ASN50T1

L = 10 ꢀ H

Q = MMJT9410

= 220 ꢀ F

OUT

T = 25°C

A

C

= 220 ꢀ F

C

OUT

T = 25°C

A

20

40

60

80

20

40

60

80

I , OUTPUT CURRENT (mA)

O

I , OUTPUT CURRENT (mA)

O

Figure 49. NCP1450ASN50T1 Startup/Hold

Voltage vs. Output Current (Using MOSFET)

Figure 50. NCP1450ASN50T1 Startup/Hold

Voltage vs. Output Current (Using BJT)

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12

NCP1450A

2 ꢀ s/div

V

OUT

= 1.9 V, V = 1.2 V, I = 20 mA, L = 10 ꢀ H,

V

OUT

= 1.9 V, V = 1.2 V, I = 500 mA, L = 10 ꢀ H,

IN

O

IN

O

C

= 220 ꢀ F

C

= 220 ꢀ F

OUT

1. V , 1.0 V/div

L

2. I , 500 mA/div

L

3. V , 50 mV/div, AC coupled

OUT

3. V , 50 mV/div, AC coupled

OUT

Figure 51. NCP1450ASN19T1 Operating

Waveforms (Medium Load)

Figure 52. NCP1450ASN19T1 Operating

Waveforms (Heavy Load)

2 ꢀ s/div

V

OUT

= 3.0 V, V = 1.8 V, I = 20 mA, L = 10 ꢀ H,

V

OUT

= 3.0 V, V = 1.8 V, I = 500 mA, L = 10 ꢀ H,

IN

O

IN

O

C

= 220 ꢀ F

C

= 220 ꢀ F

OUT

1. V , 2.0 V/div

L

2. I , 500 mA/div

L

3. V , 50 mV/div, AC coupled

OUT

3. V , 50 mV/div, AC coupled

OUT

Figure 53. NCP1450ASN30T1 Operating

Waveforms (Medium Load)

Figure 54. NCP1450ASN30T1 Operating

Waveforms (Heavy Load)

2 ꢀ s/div

V

OUT

= 5.0 V, V = 3.0 V, I = 20 mA, L = 10 ꢀ H,

V

OUT

= 5.0 V, V = 3.0 V, I = 500 mA, L = 10 ꢀ H,

IN

O

IN

O

C

= 220 ꢀ F

C

= 220 ꢀ F

OUT

1. V , 2.0 V/div

L

2. I , 500 mA/div

L

3. V , 50 mV/div, AC coupled

OUT

3. V , 50 mV/div, AC coupled

OUT

Figure 55. NCP1450ASN50T1 Operating

Waveforms (Medium Load)

Figure 56. NCP1450ASN50T1 Operating

Waveforms (Heavy Load)

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13

NCP1450A

V

IN

= 1.5 V, L = 4.7 ꢀ H, C

= 220 ꢀ F

V

IN

= 1.5 V, L = 4.7 ꢀ H, C

= 220 ꢀ F

OUT

1. V , 1.9 V (AC coupled), 200 mV/div

OUT

1. V , 1.9 V (AC coupled), 200 mV/div

OUT

2. I , 1.0 mA to 100 mA

2. I , 100 mA to 1.0 mA

O

Figure 57. NCP1450ASN19T1 Load Transient

Response

Figure 58. NCP1450ASN19T1 Load Transient

Response

V

IN

= 2.0 V, L = 4.7 ꢀ H, C

= 220 ꢀ F

V

IN

= 2.0 V, L = 4.7 ꢀ H, C

= 220 ꢀ F

OUT

1. V , 3.0 V (AC coupled), 200 mV/div

OUT

1. V , 3.0 V (AC coupled), 200 mV/div

OUT

2. I , 1.0 mA to 100 mA

2. I , 100 mA to 1.0 mA

O

Figure 59. NCP1450ASN30T1 Load Transient

Response

Figure 60. NCP1450ASN30T1 Load Transient

Response

V

IN

= 3.0 V, L = 4.7 ꢀ H, C

= 220 ꢀ F

V

IN

= 3.0 V, L = 4.7 ꢀ H, C

= 220 ꢀ F

OUT

1. V , 5.0 V (AC coupled), 200 mV/div

OUT

1. V , 5.0 V (AC coupled), 200 mV/div

OUT

2. I , 1.0 mA to 100 mA

2. I , 100 mA to 1.0 mA

O

Figure 61. NCP1450ASN50T1 Load Transient

Response

Figure 62. NCP1450ASN50T1 Load Transient

Response

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14

NCP1450A

2.1

2.0

1.9

3.2

3.1

3.0

V

IN

= 1.5 V

V

IN

= 2.0 V

V

IN

= 2.5 V

NCP1450ASN19T1

L = 10 ꢀ H

Q = MMJT9410

NCP1450ASN30T1

L = 10 ꢀ H

Q = MMJT9410

V

= 1.5 V

IN

2.9

1.8

1.7

1.6

V

IN

= 0.9 V

V

IN

= 1.2 V

V

IN

= 1.2 V

V

IN

= 0.9 V

R = 560 ꢃ

b

R = 560 ꢃ

b

C = 0.003 ꢀ F

b

2.8

2.7

C

= 220 ꢀ F

C

= 220 ꢀ F

OUT

T = 25°C

A

T = 25°C

A

0

200

400

600

800

1000

0

200

400

600

800

1000

I , OUTPUT CURRENT (mA)

O

I , OUTPUT CURRENT (mA)

O

Figure 63. NCP1450ASN19T1 Output Voltage

vs. Output Current (Ext. BJT)

Figure 64. NCP1450ASN30T1 Output Voltage

vs. Output Current (Ext. BJT)

5.2

5.1

5.0

4.9

4.8

4.7

100

80

V

= 4.5 V

= 4.0 V

IN

V

= 1.5 V

IN

V

IN

= 1.2 V

V

IN

= 3.0 V

V

= 1.5 V

V

= 2.5 V

IN

60

40

20

0

NCP1450ASN19T1

L = 10 ꢀ H

Q = MMJT9410

NCP1450ASN50T1

L = 10 ꢀ H

V

IN

= 2.0 V

Q = MMJT9410

R = 560 ꢃ

V

= 1.2 V

b

IN

R = 560 ꢃ

b

C = 0.003 ꢀ F

b

V

= 0.9 V

IN

C = 0.003 ꢀ F

b

OUT

C = 220 ꢀ F

OUT

T = 25°C

A

V

IN

= 0.9 V

1

C

= 220 ꢀ F

T = 25°C

A

0

200

400

600

800

1000

0.01

0.1

10

100

1000

I , OUTPUT CURRENT (mA)

O

I , OUTPUT CURRENT (mA)

O

Figure 65. NCP1450ASN50T1 Output Voltage

vs. Output Current (Ext. BJT)

Figure 66. NCP1450ASN19T1 Efficiency vs.

Output Current (Ext. BJT)

100

80

100

V

IN

V

IN

V

IN

V

IN

V

IN

= 2.5 V

= 2.0 V

= 1.5 V

= 1.2 V

= 0.9 V

V

= 4.0 V

= 3.0 V

= 2.5 V

= 2.0 V

= 0.9 V

V

= 4.5 V

IN

80

60

40

20

0

V

IN

V

IN

60

40

20

0

V

IN

V

IN

= 1.5 V

= 1.2 V

NCP1450ASN30T1

L = 10 ꢀ H

NCP1450ASN50T1

L = 10 ꢀ H

Q = MMJT9410

R = 560 ꢃ

b

C = 0.003 ꢀ F

b

OUT

C

= 220 ꢀ F

C

= 220 ꢀ F

OUT

T = 25°C

A

0.01

0.1

1

10

100

1000

0.01

0.1

1

10

100

1000

I , OUTPUT CURRENT (mA)

O

I , OUTPUT CURRENT (mA)

O

Figure 67. NCP1450ASN30T1 Efficiency vs.

Output Current (Ext. BJT)

Figure 68. NCP1450ASN50T1 Efficiency vs.

Output Current (Ext. BJT)

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15

NCP1450A

10

1

100

A. V

B. V

C. V

D. V

E. V

F. V

= 1.9 V, R = 1 kꢃ

b

OUT

NCP1450ASNXXT1

L = 10 ꢀ H

Q = NTGS3446T1

F

= 3.0 V, R = 1 kꢃ

b

= 5.0 V, R = 1 kꢃ

b

C

E

= 1.9 V, R = 560 ꢃ

b

10

= 3.0 V, R = 560 ꢃ

C

= 220 ꢀ F

b

OUT

= 5.0 V, R = 560 ꢃ

OUT

b

T = 25°C

A

B

D

NCP1450ASNXXT1

L = 10 ꢀH

Q = MMJT9410

1

0.1

V

3

= 5.0 V

OUT

C

T

= 220 ꢀF

= 25°C

OUT

0.1

0.01

A

V

= 3.0 V

4

OUT

V

OUT

= 1.9 V

2

0.01

1

5

0

1

2

3

4

5

V

IN

, INPUT VOLTAGE (V)

V , INPUT VOLTAGE (V)

IN

Figure 69. NCP1450ASNXXT1 No Load Input

Current vs. Input Voltage (Using MOSFET)

Figure 70. NCP1450ASNXXT1 No Load Input

Current vs. Input Voltage (Using BJT)

Components Supplier

Parts

Supplier

Part Number

CD54−100MC

MBRM110L

Description

Phone

Inductor: L1, L2

Schottky Diode: D1, D2

MOSFET: Q1

Sumida Electric Co. Ltd.

ON Semiconductor

KEMET Electronics Corp.

Inductor 10 ꢀ H/1.44 A

(852) 2880−6688

(852) 2689−0088

(852) 2305−1168

Schottky Power Rectifier

Power MOSFET N−Channel

Bipolar Power Transistor

NTGS3446T1

MMJT9410

BJT: Q2

Output Capacitor: C1, C3

T494D227K006AS

Low ESR Tantalum Capacitor

220 ꢀ F/6.0 V

Input Capacitor: C2, C4

KEMET Electronics Corp.

T491C106K016AS

Low Profile Tantalum Capacitor

(852) 2305−1168

10 ꢀ F/16 V

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16

NCP1450A

DETAILED OPERATING DESCRIPTION

Soft Start

Operation

The NCP1450A series are monolithic power switching

controllers optimized for battery powered portable products

where large output current is required.

There is a soft start circuit in NCP1450A. When power is

applied to the device, the soft start circuit first pumps up the

output voltage to approximately 1.5 V at a fixed duty cycle.

This is the voltage level at which the controller can operate

normally. In addition to that, the startup capability with

heavy loads is also improved.

The NCP1450A series are low noise fixed frequency

voltage−mode PWM DC−DC controllers, and consist of

startup circuit, feedback resistor divider, reference voltage,

oscillator, loop compensation network, PWM control

circuit, and low ON resistance driver. Due to the on−chip

feedback resistor and loop compensation network, the

system designer can get the regulated output voltage from

1.8 V to 5.0 V with 0.1 V stepwise with a small number of

external components. The quiescent current is typically

Oscillator

The oscillator frequency is internally set to 180 kHz at an

accuracy of "20% and with low temperature coefficient of

0.11%/°C.

Regulated Converter Voltage (V_OUT

)

93 ꢀ A (V

= 2.7 V, f

= 180 kHz), and can be further

OUT

OSC

The V

is set by an integrated feedback resistor

OUT

reduced to about 1.5 ꢀ A when the chip is disabled (V

t

CE

network. This is trimmed to a selected voltage from 1.8 V to

5.0 V range in 100 mV steps with an accuracy of "2.5%.

0.3 V).

The NCP1450A operation can be best understood by

referring to the block diagram in Figure 2. The error

amplifier monitors the output voltage via the feedback

resistor divider by comparing the feedback voltage with the

reference voltage. When the feedback voltage is lower than

the reference voltage, the error amplifier output will

decrease. The error amplifier output is then compared with

the oscillator ramp voltage at the PWM controller. When the

ramp voltage is higher than the error amplifier output, the

high−side driver is turned on and the low−side driver is

turned off which will then switch on the external transistor;

and vice versa. As the error amplifier output decreases, the

high−side driver turn−on time increases and duty cycle

increases. When the feedback voltage is higher than the

reference voltage, the error amplifier output increases and

the duty cycle decreases. When the external power switch is

on, the current ramps up in the inductor, storing energy in the

magnetic field. When the external power switch is off, the

energy stored in the magnetic field is transferred to the

output filter capacitor and the load. The output filter

capacitor stores the charge while the inductor current is

higher than the output current, then sustains the output

voltage until the next switching cycle.

Compensation

The device is designed to operate in continuous

conduction mode. An internal compensation circuit was

designed to guarantee stability over the full input/output

voltage and full output load range.

Enable/Disable Operation

The NCP1450A series offer IC shutdown mode by chip

enable pin (CE pin) to reduce current consumption. When

voltage at pin CE is equal or greater than 0.9 V, the chip will

be enabled, which means the controller is in normal

operation. When voltage at pin CE is less than 0.3 V, the chip

is disabled, which means IC is shutdown.

Important: DO NOT apply a voltage between 0.3 V to 0.9 V

to pin CE as this is the CE pin’s hysteresis voltage range.

Clearly defined output states can only be obtained by

applying voltage out of this range.

As the load current is decreased, the switch transistor turns

on for a shorter duty cycle. Under the light load condition,

the controller will skip switching cycles to reduce power

consumption, so that high efficiency is maintained at light

loads.

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17

NCP1450A

APPLICATION CIRCUIT INFORMATION

Step−up Converter Design Equations

Calculate the maximum inductance value which can

generate the desired current output and the preferred delta

inductor current to average inductor current ratio:

The NCP1450A PWM step−up DC−DC controller is

designed to operate in continuous conduction mode and can

be defined by the following equations. External components

values can be calculated from these equations, however, the

optimized value should obtained through experimental

results.

2

(3.3V ) 0.3V * 2.4V)(1 * 0.364)

180000Hz 1A 0.2

L v

+ 13.5ꢀ H

Determine the average inductor current and peak inductor

current:

Calculation

Equation

) V * V

IN

1

I

+

+ 1.57A

L

1 * 0.364

D

V

OUT

D

v

) V * V

OUT

D

S

0.2

I

+ 1.57A (1 )

) + 1.73A

PK

2

I

L

I

O

Therefore, a 12 ꢀ H inductor with saturation current larger

than 1.73 A can be selected as the initial trial.

Calculate the delta charge stored in the output capacitor

during the charging up period in each switching cycle:

(1 * D)

L

2

(V

) V * V )(1 * D)

IN

OUT

D

f I DIR

O

I

DIR

2

PK

I (1 )

)

L

(1.57A * 1A)(1 * 0.364)

ꢂ

Q

+

+ 2.01ꢀ C

18000Hz

ꢂ

Q

( I * I )(1 * D)

L

O

f

Determine the output capacitance value for the desired

output ripple voltage:

V

PP

ꢂ

Q

[

) ( I * I ) ESR

L O

C

OUT

Assume the ESR of the output capacitor is 0.15 ꢃ,

NOTES:

2.01ꢀ C

D

− On−time duty cycle

− Average inductor current

− Peak inductor current

C

u

+ 138.6ꢀ F

OUT

I

L

100mV * (1.57A * 1A) 0.15ꢃ

I

PK

Therefore, a Tantalum capacitor with value of 150 ꢀ F to

220 ꢀ F and ESR of 0.15 ꢃ can be used as the output

capacitor. However, according to experimental result,

220ꢄ ꢀ F output capacitor gives better overall operational

stability and smaller ripple voltage.

DIR − Delta inductor current to average inductor current ratio

I

O

− Desired dc output current

− Nominal operating dc input voltage

− Desired dc output voltage

− Diode forward voltage

− Saturation voltage of the external transistor switch

V

IN

OUT

D

S

− Charge stores in the C

− Equivalent series resistance of the output capacitor

during charging up

ꢂ

Q

OUT

External Component Selection

ESR

Inductor Selection

Design Example

The NCP1450A is designed to work well with a 6.8 to

12 ꢀ H inductors in most applications 10 ꢀ H is a sufficiently

low value to allow the use of a small surface mount coil, but

large enough to maintain low ripple. Lower inductance

values supply higher output current, but also increase the

ripple and reduce efficiency.

Higher inductor values reduce ripple and improve

efficiency, but also limit output current.

The inductor should have small DCR, usually less than

It is supposed that a step−up DC−DC controller with 3.3 V

output delivering a maximum 1000 mA output current with

100 mV output ripple voltage powering from a 2.4 V input

is to be designed.

Design parameters:

V

= 2.4 V

= 3.3 V

= 1.0 A

= 100 mV

IN

V

OUT

I

V

O

pp

1ꢄ ꢃ, to minimize loss. It is necessary to choose an inductor

with a saturation current greater than the peak current which

the inductor will encounter in the application.

f = 180 kHZ

DIR = 0.2 (typical for small output ripple voltage)

Assume the diode forward voltage and the transistor

saturation voltage are both 0.3 V. Determine the maximum

steady state duty cycle at V = 2.4 V:

IN

3.3V ) 0.3V * 2.4V

D +

+ 0.364

3.3V ) 0.3V * 0.3V

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18

NCP1450A

Diode

more efficient switch than a BJT transistor. However, the

The diode is the largest source of loss in DC−DC

converters. The most importance parameters which affect

MOSFET requires a higher voltage to turn on as compared

with BJT transistors. An enhancement N−channel MOSFET

can be selected by the following guidelines:

their efficiency are the forward voltage drop, V , and the

D

reverse recovery time, trr. The forward voltage drop creates

a loss just by having a voltage across the device while a

current flowing through it. The reverse recovery time

generates a loss when the diode is reverse biased, and the

current appears to actually flow backwards through the

diode due to the minority carriers being swept from the P−N

1. Low ON−resistance, R

2. Low gate threshold voltage, V

, typically < 0.1 ꢃ.

DS(on)

, must be <

GS(th)

V , typically < 1.5 V, it is especially important

OUT

for the low V

device, like V

= 1.9 V.

OUT

3. Rated continuous drain current, I , should be

D

larger than the peak inductor current, i.e. I > I

.

D

PK

junction.

A

Schottky diode with the following

4. Gate capacitance should be 1200 pF or less.

characteristics is recommended:

For bipolar NPN transistor, medium power transistor with

Small forward voltage, V t 0.3 V

continuous collector current typically 1 A to 5 A and V

F

CE(sat)

< 0.2 V should be employed. The driving capability is

Small reverse leakage current

determined by the DC current gain, H , of the transistor and

FE

Fast reverse recovery time/switching speed

the base resistor, Rb; and the controller’s EXT pin must be

able to supply the necessary driving current.

Rated current larger than peak inductor current,

I

u I

PK

rated

Reverse voltage larger than output voltage,

u V

Rb can be calculated by the following equation:

V

reverse

OUT

V

0.7

0.4

OUT *

Rb +

*

|

Ib

I

Input Capacitor

EXTH

The input capacitor can stabilize the input voltage and

minimize peak current ripple from the source. The value of

the capacitor depends on the impedance of the input source

used. Small Equivalent Series Resistance (ESR) Tantalum

or ceramic capacitor with a value of 10 ꢀ F should be

suitable.

I

H

PK

FE

Ib +

Since the pulse current flows through the transistor, the

exact Rb value should be finely tuned by the experiment.

Generally, a small Rb value can increase the output current

capability, but the efficiency will decrease due to more

energy is used to drive the transistor.

Moreover, a speed−up capacitor, Cb, should be connected

in parallel with Rb to reduce switching loss and improve

efficiency. Cb can be calculated by the equation below:

Output Capacitor

The output capacitor is used for sustaining the output

voltage when the external MOSFET or bipolar transistor is

switched on and smoothing the ripple voltage. Low ESR

capacitor should be used to reduce output ripple voltage. In

general, a 100 ꢀ F to 220 ꢀ F low ESR (0.10 ꢃ to 0.30 ꢃ)

Tantalum capacitor should be appropriate.

1

Cb v

2ꢅ Rb f

OSC

0.7

It is due to the variation in the characteristics of the

transistor used. The calculated value should be used as the

initial test value and the optimized value should be obtained

by the experiment.

External Switch Transistor

An enhancement N−channel MOSFET or a bipolar NPN

transistor can be used as the external switch transistor.

For enhancement N−channel MOSFET, since

enhancement MOSFET is a voltage driven device, it is a

External Component Reference Data

Inductor

Value

External

Transistor

Output

Capacitor

Model

CD54

Device

V

Diode

OUT

NCP1450ASN19T1

NCP1450ASN30T1

NCP1450ASN50T1

NCP1450ASN19T1

NCP1450ASN30T1

NCP1450ASN50T1

1.9 V

3.0 V

5.0 V

1.9 V

3.0 V

5.0 V

12 ꢀ H

10 ꢀ H

12 ꢀ H

10 ꢀ H

NTGS3446T1

MMJT9410

MBRM110L

220 ꢀ F

MMJT9410

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19

NCP1450A

An evaluation board of NCP1450A has been made in the

ON Semiconductor representative for availability. The

evaluation board schematic diagrams are shown in

Figures 73 and 74.

small size of 89 mm x 51 mm. The artwork and the silk

screen of the surface−mount evaluation board PCB are

shown in Figures 71 and 72. Please contact your

51 mm

89 mm

Figure 71. NCP1450A PWM Step−up DC−DC Controller Evaluation Board Silkscreen

51 mm

89 mm

Figure 72. NCP1450A PWM Step−up DC−DC Controller Evaluation Board Artwork (Component Side)

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20

NCP1450A

L1

10 ꢀ H

D1

MBRM110L

JP1

TP1

TP3

V

IN

V

OUT

NTGS3446T1

CE

1

EXT

5

ON

CE

OFF

Q1

C2

10 ꢀ F

C1

220 ꢀ F

OUT

2

IC1

C3

0.1 ꢀ F

NC

GND

4

TP2

GND

TP4

GND

3

Figure 73. NCP1450A Evaluation Board Schematic Diagram 1 (Step−up

DC−DC Converter Using External MOSFET Switch)

L2

10 ꢀ H

D2

MBRM110L

JP2

TP5

TP7

V

IN

V

OUT

Rb

560

CE

1

EXT

5

ON

CE

OFF

Q2

MMJT9410

C5

10 ꢀ F

C4

220 ꢀ F

OUT

2

IC2

Cb

3000 pF

C6

0.1 ꢀ F

NC

3

GND

4

TP6

TP8

GND

Figure 74. NCP1450A Evaluation Board Schematic Diagram 2 (Step−up

DC−DC Converter Using External Bipolar Transistor Switch)

PCB Layout Hints

Grounding

Output Capacitor

One point grounding should be used for the output power

return ground, the input power return ground, and the device

switch ground to reduce noise. In Figure 73, e.g.: C2 GND,

C1 GND, and IC1 GND are connected at one point in the

evaluation board. The input ground and output ground traces

must be thick enough for current to flow through and for

reducing ground bounce.

The output capacitor should be placed close to the output

terminals to obtain better smoothing effect on the output

ripple.

Switching Noise Decoupling Capacitor

A 0.1 ꢀ F ceramic capacitor should be placed close to the

OUT pin and GND pin of the NCP1450A to filter the

switching spikes in the output voltage monitored by the

OUT pin.

Power Signal Traces

Low resistance conducting paths should be used for the

power carrying traces to reduce power loss so as to improve

efficiency (short and thick traces for connecting the inductor

L can also reduce stray inductance), e.g.: short and thick

traces listed below are used in the evaluation board:

1. Trace from TP1 to L1

2. Trace from L1 to anode pin of D1

3. Trace from cathode pin of D1 to TP3

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21

NCP1450A

PACKAGE DIMENSIONS

TSOP−5

SN SUFFIX

CASE 483−02

ISSUE E

NOTES:

1. DIMENSIONING AND TOLERANCING PER

ANSI Y14.5M, 1982.

D

2. CONTROLLING DIMENSION: MILLIMETER.

3. MAXIMUM LEAD THICKNESS INCLUDES

LEAD FINISH THICKNESS. MINIMUM LEAD

THICKNESS IS THE MINIMUM THICKNESS

OF BASE MATERIAL.

4. A AND B DIMENSIONS DO NOT INCLUDE

MOLD FLASH, PROTRUSIONS, OR GATE

BURRS.

5

4

3

B

C

S

1

2

L

MILLIMETERS

INCHES

MIN MAX

0.1142 0.1220

G

DIM

A

B

C

D

G

H

J

K

L

MIN

2.90

1.30

0.90

0.25

0.85

0.013

0.10

0.20

1.25

0

MAX

3.10

A

1.70 0.0512 0.0669

1.10 0.0354 0.0433

0.50 0.0098 0.0197

1.05 0.0335 0.0413

0.100 0.0005 0.0040

0.26 0.0040 0.0102

0.60 0.0079 0.0236

1.55 0.0493 0.0610

J

0.05 (0.002)

H

M

K

M

S

10

0

10

_

2.50

3.00 0.0985 0.1181

SOLDERING FOOTPRINT*

1.9

0.074

0.95

0.037

2.4

0.094

1.0

0.039

0.7

0.028

mm

inches

ǒ

Ǔ

SCALE 10:1

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and

Mounting Techniques Reference Manual, SOLDERRM/D.

ON Semiconductor and

are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice

to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All

operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights

nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications

intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should

Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,

and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death

associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal

Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

PUBLICATION ORDERING INFORMATION

LITERATURE FULFILLMENT:

N. American Technical Support: 800−282−9855 Toll Free

USA/Canada

ON Semiconductor Website: http://onsemi.com

Order Literature: http://www.onsemi.com/litorder

Literature Distribution Center for ON Semiconductor

P.O. Box 61312, Phoenix, Arizona 85082−1312 USA

Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada

Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada

Email: orderlit@onsemi.com

Japan: ON Semiconductor, Japan Customer Focus Center

2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051

Phone: 81−3−5773−3850

For additional information, please contact your

local Sales Representative.

NCP1450A/D

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22

型号:	NCP1450ASN50T1G
Brand Name：	ON Semiconductor
是否无铅：	不含铅
是否Rohs认证：	符合
生命周期：	Obsolete
零件包装代码：	TSOP
包装说明：	TSSOP, TSOP5/6,.11,37
针数：	5
制造商包装代码：	483
Reach Compliance Code：	compliant
ECCN代码：	EAR99
HTS代码：	8542.39.00.01
风险等级：	5.8
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER
控制模式：	VOLTAGE-MODE
控制技术：	PULSE WIDTH MODULATION
标称输入电压：	5 V
JESD-30 代码：	R-PDSO-G5
JESD-609代码：	e3
长度：	3 mm
湿度敏感等级：	1
功能数量：	1
端子数量：	5
最高工作温度：	85 °C
最低工作温度：	-40 °C
最大输出电流：	0.15 A
封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP
封装等效代码：	TSOP5/6,.11,37
封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified
座面最大高度：	1.1 mm
子类别：	Switching Regulator or Controllers
表面贴装：	YES
切换器配置：	SINGLE
最大切换频率：	216 kHz
温度等级：	INDUSTRIAL
端子面层：	Tin (Sn)
端子形式：	GULL WING
端子节距：	0.95 mm
端子位置：	DUAL
处于峰值回流温度下的最长时间：	40
宽度：	1.5 mm
Base Number Matches：	1

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