UC382T-2各脚功能电路原理芯片引脚定义引脚图及功能IC贸易商-中国IC网-芯三七

ꢀꢁ ꢂ ꢃꢂ ꢄꢅ ꢆ ꢀꢁ ꢂ ꢃꢂ ꢄꢂ ꢆ ꢀꢁ ꢂ ꢃ ꢂ ꢄꢇ ꢆ ꢀꢁꢂ ꢃ ꢂ ꢄꢈꢉ ꢊꢆ ꢀꢁꢇ ꢃ ꢂ ꢄꢅ ꢆ ꢀꢁꢇ ꢃ ꢂ ꢄꢂ ꢆ ꢀꢁꢇ ꢃ ꢂ ꢄꢇ ꢆ ꢀꢁ ꢇꢃ ꢂꢄ ꢈꢉ ꢊ

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ꢕ

SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

5-PIN TO-220

D

Fast Transient Response

T PACKAGE (TOP VIEW)

D

10-mA to 3-A Load Current

Short Circuit Protection

Maximum Dropout of 450-mV at 3-A Load

Current

D

Separate Bias and VIN Pins

D

Available in Adjustable or Fixed-Output

Voltages

D

5-Pin Package Allows Kelvin Sensing of

Load Voltage

5-PIN TO-263

TD PACKAGE

(TOP VIEW)

Reverse Current Protection

Note: Tab = Ground

description

The UC382 is a low-dropout-linear regulator providing a quick response to fast load changes. Combined with

its precision onboard reference, the UC382 excels at driving GTL and BTL buses. Due to its fast response to

load transients, the total capacitance required to decouple the regulator’s output can be significantly decreased

when compared to standard LDO linear regulators.

Dropout voltage (VIN to VOUT) is only 450 mV maximum at 100°C and 350 mV typical at 3-A load.

The onboard bandgap reference is stable with temperature and scaled for a 1.2-V input to the internal-power

amplifier. The UC382 is available in fixed-output voltages of 1.5 V, 2.1 V, or 2.5 V. The output voltage of the

adjustable version can be set with two external resistors. If the external resistors are omitted, the output voltage

defaults to 1.2 V.

block diagram

VB

1

R1

R2

UC382−ADJ

OPEN

2 k

0

UC382−1 (1.5 V)

UC382−2 (2.1 V)

UC382−3 (2.5 V)

500

1.5 k

Ω

2 k

2.16 k

THERMAL

SHUTDOWN

2

VIN

1.2 V

BANDGAP

REFERENCE

+

SHORT

CIRCUIT

SENSE

R2

R1

3

5

4

GND

ADJ

VOUT

UDG-00080

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

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Copyright  2000−2004, Texas Instruments Incorporated

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1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

ꢀ ꢁꢂꢃ ꢂꢄ ꢅꢆ ꢀ ꢁꢂ ꢃ ꢂ ꢄꢂ ꢆ ꢀꢁ ꢂ ꢃꢂ ꢄꢇ ꢆ ꢀꢁ ꢂ ꢃꢂ ꢄꢈ ꢉ ꢊꢆ ꢀꢁꢇ ꢃ ꢂ ꢄꢅ ꢆ ꢀꢁꢇ ꢃ ꢂ ꢄꢂ ꢆ ꢀꢁꢇ ꢃ ꢂ ꢄꢇ ꢆ ꢀꢁꢇ ꢃ ꢂ ꢄꢈꢉ ꢊ

ꢋꢈꢌ ꢍ ꢎ ꢉ ꢏ ꢎ ꢐ ꢑ ꢒ ꢈꢓ ꢓꢒ ꢔ ꢀꢎꢈꢍꢏ ꢓ

ꢕ

SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

†}

absolute maximum ratings over operating free-air temperature (unless otherwise noted)

VB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 V

VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 V

Output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 V to 6.0 V

Storage temperature, T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C

stg

J

Junction temperature, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 150°C

Lead temperature (soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

} Currents are positive into, negative out of the specified terminal. Consult Packaging Section of Databook for thermal limitations and

considerations of packages.

(1)

AVAILABLE OPTIONS

PACKAGED DEVICES

(2)

TO−263 (TD)

TO-220 (T)

T

J

OUTPUT VOLTAGE

1.5 V

282T-1

382T-1

2.1 V

282T-2

382T-2

2.5 V

282T-3

382T-3

1.2 V or ADJ

282T-ADJ

1.5 V

2.1 V

2.5 V

1.2 V or ADJ

282TD-ADJ

382TD-ADJ

–40°C to 100°C

0°C to 100°C

282TD-1

382TD-1

282TD-2

382TD-2

282TD-3

382TD-3

382T-ADJ

1. For more package and ordering information, see the Package Option Addendum located at the end of this data sheet.

2. For 50 piece reel, add KTTT (e.g., UC282TDKTTT−1); for 500 piece reel, add TR (e.g., UC282TDTR−1).

electrical characteristics, T = −40°C to 100°C for the UC282-X series and 0°C to 100°C for the

A

UC382-X, VB = 5 V, VIN = 3.3 V, VOUT = 2.5 V for the UC382-ADJ, T = T , (unless otherwise stated)

A

J

UC382-3 fixed 2.5 V, 3-A family

PARAMETERS

TEST CONDITIONS

MIN

2.475

2.450

TYP

2.500

0.5

MAX UNITS

UC382-3

UC282-3

2.525

4

V

Output voltage (I

= 100 mA)

VOUT

Load regulation

VIN PSSR

I

= 10 mA to 3 A

mV

dB

mV

V

VOUT

80

50

100

60

VB PSSR

I

= 3 A,

T

J

= 25°C

350

1.8

425

450

500

2.10

2.20

4.5

VOUT

UC382-3

UC282-3

UC382-3

UC282-3

VIN dropout voltage = VIN−VOUT

VB dropout = VB−VOUT

Short circuit current limit

1.8

V

3.3

A

I

= 10 mA

= 3 A

6

18

11

mA

A

VOUT

VB current

VIN current

60

= 3 A

2.94

2.97

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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ꢕ

SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

electrical characteristics, T = −40°C to 100°C for the UC282-X series and 0°C to 100°C for the

A

UC382-X, VB = 5 V, VIN = 3.3 V, VOUT = 2.5 V for the UC382-ADJ, T = T , (unless otherwise stated)

A

J

UC382-2 fixed 2.1 V, 3-A family

PARAMETERS

TEST CONDITIONS

MIN

2.079

2.058

TYP

2.100

0.5

MAX UNITS

UC382-2

UC282-2

2.121

4

V

Output voltage (I

= 100 mA)

VOUT

Load regulation

VIN PSSR

I

= 10 mA to 3 A

mV

dB

mV

V

VOUT

80

52

100

62

VB PSSR

I

= 3 A,

T

J

= 25°C

350

1.8

425

450

500

2.10

2.20

4.5

VOUT

UC382-2

UC282-2

UC382-2

UC282-2

VIN dropout voltage = VIN−VOUT

VB dropout = VB−VOUT

Short circuit current limit

1.8

V

3.3

A

I

= 10 mA

= 3 A

6

18

11

mA

A

VOUT

VB current

VIN current

60

= 3 A

2.94

2.97

UC382-1 fixed 1.5 V, 3-A family

PARAMETERS

TEST CONDITIONS

MIN

1.485

1.470

TYP

1.500

0.5

MAX UNITS

UC382-1

UC282-1

1.515

4

V

Output voltage (I

= 100 mA)

VOUT

Load regulation

VIN PSSR

I

= 10 mA to 3 A

mV

dB

mV

V

VOUT

80

55

100

65

VB PSSR

I

= 3 A,

T

J

= 25°C

350

1.8

425

450

500

2.10

2.20

4.5

VOUT

UC382-1

UC282-1

UC382-1

UC282-1

VIN dropout voltage = VIN−VOUT

VB dropout = VB−VOUT

Short circuit current limit

1.8

V

3.3

A

I

= 10 mA

= 3 A

6

18

11

mA

A

VOUT

VB current

VIN current

60

= 3 A

2.94

2.97

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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ꢋꢈꢌ ꢍ ꢎ ꢉ ꢏ ꢎ ꢐ ꢑ ꢒ ꢈꢓ ꢓꢒ ꢔ ꢀꢎꢈꢍꢏ ꢓ

ꢕ

SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

electrical characteristics, T = −40°C to 100°C for the UC282-X series and 0°C to 100°C for the

A

UC382-X, VB = 5 V, VIN = 3.3 V, VOUT = 2.5 V for the UC382-ADJ, T = T , (unless otherwise stated)

A

J

UC382-ADJ adjustable, 3-A family

PARAMETERS

TEST CONDITIONS

MIN

1.188

1.176

TYP

1.200

0.5

MAX UNITS

UC382-ADJ

UC282-ADJ

1.212

4

V

ADJ voltage (I

VOUT

= 100 mA)

Load regulation

VIN PSSR

I

= 10 mA to 3 A

mV

dB

mV

V

VOUT

VOUT programmed for 2.5 V

80

50

100

60

VB PSSR

I

= 3 A,

T

J

= 25°C

350

1.8

425

450

500

2.10

2.20

4.5

VOUT

UC382-ADJ

UC282-ADJ

UC382-ADJ

UC282-ADJ

VIN dropout voltage = VIN−VOUT

VB dropout = VB−VOUT

Short circuit current limit

1.8

V

3.3

A

I

= 10 mA

= 3 A

6

18

11

mA

A

VOUT

VB current

VIN current

60

= 3 A

2.94

2.97

pin descriptions

ADJ: In the adjustable version, the user programs the output voltage with two external resistors. The resistors

should be 0.1% for high accuracy. The output amplifier is configured as a non-inverting-operational amplifier.

The resistors should meet the criteria of R3 || R4 < 100 Ω. Connect ADJ to VOUT for an output voltage of 1.2 V.

Note that the point at which the feedback network is connected to the output is the Kelvin sense point. For -1,

-2, and -3 versions, ADJ pin is tied to VOUT to obtain specified output voltage.

GND: For accurate results, the GND pin should be referenced to the load ground.

VB: Supplies power to all circuits of the regulator except the collector of the output-power transistor. The 2-V

headroom from VB to VOUT allows the use of a Darlington output stage for inherently-low-output impedance

and fast response. (Dropout is derated for junction temperatures below 0°C.)

VIN: Supplies the current to the collector of the output-power transistor only. The dropout (VIN−VOUT) is under

100 mV for light loads; maximum dropout is 450 mV at 3 A for T = 0°C to 100°C. (Dropout is derated for junction

J

temperatures over 100°C.) At full load, the majority of the VB current is going to the load.

VOUT: This pin should be connected to the load via a low impedance path. Avoid connectors which add

significant inductance and resistance. Note that even though a Kelvin sense is available through a 5-pin

package, care must be taken since voltage drops along wire traces add to the dropout voltage.

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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ꢕ

SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

pin descriptions (continued)

DROPOUT VOLTAGE (V − V

B

)

DROPOUT VOLTAGE (V − V

)

OUT

IN

OUT

vs

LOAD CURRENT

1.9

1.8

1.7

1.6

400

300

T

J

= 275C

T

J

= 275C

200

100

0

1

2

3

100 mA

1 A

2 A

3 A

I − Load Current − A

L

I

L

- Load Current - A

Figure 1

Figure 2

APPLICATION INFORMATION

The UC382 is easy to use. The adjustable version requires two 0.1% resistors to set the output voltage. The

fixed versions of the UC382 require no external resistors. All versions of the UC382 require decoupling

capacitors on the input and output. In a typical application, VB and VIN are driven from switching power supplies

which may have large filter capacitors at their outputs. If the UC382 is further than 12 inches from the power

supply, it is recommended to add local decoupling as close as possible to the linear regulator.

Decouple the output of the UC382 with at least 100 µF of high-quality tantalum or Sanyo OSCON capacitors

close to the VOUT pin for maximum stability. Many applications involving Ultra-Fast GTL or BTL applications

require additional capacitance close to the load. The exact amount will vary according to speed and magnitude

of the load transients and the tolerance allowed for transients on VOUT. When specifying the decoupling

capacitors, the series resistance of the capacitor bank is an important factor in its ability to filter load transients.

The UC382 allows for Kelvin sensing the voltage at the load. This improves regulation performance and

eliminates the voltage drops due to wire-trace resistance. This voltage drop must be added to the headroom

(VIN to VOUT and VB to VOUT). The dropout of 450 mV is measured at the pins and does not include additional

drops due to trace resistance. The minimum load current is 10 mA.

Two or more UC382’s may be used in parallel. While stable, this arrangement does degrade the transient

response.

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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ꢕ

SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

OPEN LOOP PHASE

vs

OPEN LOOP GAIN

vs

FREQUENCY

0

70

60

50

40

30

−90

20

10

0

−10

−180

100

1 k

10 k

100 k

1 M

10 M

100

1 k

10 k

100 k

1 M

10 M

f − Frequency − Hz

Figure 3

Figure 4

POWER SUPPLY REJECTION RATIO (VB INPUT)

vs

FREQUENCY

60

50

40

30

20

10

0

100

1 k

10 k

100 k

1 M

10 M

f − Frequency − Hz

Figure 5

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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ꢋꢈꢌꢍ ꢎ ꢉꢏ ꢎ ꢐꢑꢒ ꢈꢓ ꢓꢒꢔ ꢀ ꢎꢈꢍꢏ ꢓ

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ꢕ

SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

APPLICATION INFORMATION

5 V

µ

F

1

CER

1

IRF

520

V

= 1.2 V

+

3.3 V

VB

O

2

VIN

VOUT

4

5

+

µ

PULSE

4.7

F

100

F

121

UC382−ADJ

Ω



TANT

R1

GENERATOR

ADJ

GND

3

UDG-00081

Figure 6. Transient Test Circuit

10 mA to 3 A/ms Load Transient Response

∆

µ

Figure 7

7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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ꢋꢈꢌ ꢍ ꢎ ꢉ ꢏ ꢎ ꢐ ꢑ ꢒ ꢈꢓ ꢓꢒ ꢔ ꢀꢎꢈꢍꢏ ꢓ

ꢕ

SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

APPLICATION INFORMATION

+5 V

+

4.7µF

CER

KELVIN

SENSE

POINT

1

+3.3 V

VB

+1.8 V

OUTPUT

2

VIN

VOUT

4

5

+

R3

60

4.7µF

TANT

330µF

OSCON

2.2µF

CER

UC382−ADJ

Ω

ADJ

GND

3

R4

120Ω

UDG-00082

Figure 8. Typical UC382-ADJ Application

+5 V

KELVIN

SENSE

POINT

+

4.7µF

1

VB

+1.5 V

OUTPUT

2

VIN

VOUT

ADJ

4

5

+

330µF

OSCON

2.2µF

CER

UC382−1

GND

3

UDG-00083

Figure 9. Typical UC382-1, -2, or -3 Application

8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PACKAGE OPTION ADDENDUM

www.ti.com

9-Dec-2004

PACKAGING INFORMATION

Orderable Device

Status ⁽¹⁾

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

Drawing

UC282T-1

UC282T-2

ACTIVE

TO-220

KC

5

50

None

CU SN

Call TI

Level-NA-NA-NA

Call TI

KC

UC282T-3

KC

50

UC282T-ADJ

UC282TD-1

KC

1000

OBSOLETE DDPAK/

TO-263

KTT

UC282TD-2

UC282TD-3

OBSOLETE DDPAK/

TO-263

KTT

5

None

Call TI

CU SN

Call TI

OBSOLETE DDPAK/

TO-263

Call TI

UC282TD-ADJ

UC282TDKTTT-1

UC282TDKTTT-2

UC282TDKTTT-3

UC282TDKTTT-ADJ

UC282TDTR-1

UC282TDTR-2

UC282TDTR-3

UC282TDTR-ADJ

OBSOLETE DDPAK/

TO-263

Call TI

ACTIVE

DDPAK/

TO-263

50

Level-2-220C-1 YEAR

DDPAK/

TO-263

DDPAK/

TO-263

50

DDPAK/

TO-263

50

DDPAK/

TO-263

500

DDPAK/

TO-263

DDPAK/

TO-263

DDPAK/

TO-263

UC382T-1

UC382T-2

ACTIVE

TO-220

KC

5

50

None

CU SN

Call TI

Level-NA-NA-NA

Call TI

UC382T-3

KC

UC382T-ADJ

UC382TD-1

KC

OBSOLETE DDPAK/

TO-263

KTT

UC382TD-2

UC382TD-3

OBSOLETE DDPAK/

TO-263

KTT

5

None

Call TI

CU SN

Call TI

OBSOLETE DDPAK/

TO-263

Call TI

UC382TD-ADJ

OBSOLETE DDPAK/

TO-263

Call TI

UC382TDKTTT-1

UC382TDKTTT-2

UC382TDKTTT-3

UC382TDKTTT-ADJ

ACTIVE

DDPAK/

TO-263

50

Level-2-220C-1 YEAR

DDPAK/

TO-263

DDPAK/

TO-263

DDPAK/

TO-263

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

9-Dec-2004

Orderable Device

UC382TDTR-1

UC382TDTR-2

UC382TDTR-3

UC382TDTR-ADJ

Status ⁽¹⁾

ACTIVE

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

Drawing

DDPAK/

TO-263

KTT

5

500

None

CU SN

Level-2-220C-1 YEAR

DDPAK/

TO-263

KTT

DDPAK/

TO-263

DDPAK/

TO-263

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2)

Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional

product content details.

None: Not yet available Lead (Pb-Free).

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered

at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,

including bromine (Br) or antimony (Sb) above 0.1% of total product weight.

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is

provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the

accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take

reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited

information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

to Customer on an annual basis.

Addendum-Page 2

MECHANICAL DATA

MSOT008B – JANUARY 1995 – REVISED SEPTEMBER 2000

KC (R-PSFM-T5)

PLASTIC FLANGE-MOUNT

0.113 (2,87)

0.103 (2,62)

0.420 (10,67)

0.380 (9,65)

0.185 (4,70)

0.156 (3,96)

DIA

0.175 (4,46)

0.055 (1,40)

0.146 (3,71)

0.045 (1,14)

0.147 (3,73)

0.137 (3,48)

0.340 (8,64)

0.330 (8,38)

1.037 (26,34)

0.997 (25,32)

0.125 (3,18)

(see Note C)

5

1

0.040 (1,02)

0.030 (0,76)

0.010 (0,25)

0.122 (3,10)

0.102 (2,59)

0.067 (1,70)

0.268 (6,81)

0.025 (0,64)

M

0.012 (0,30)

4040208/E 09/00

NOTES: A. All linear dimensions are in inches (millimeters).

B. This drawing is subject to change without notice.

C. Lead dimensions are not controlled within this area.

D. All lead dimensions apply before solder dip.

E. The center lead is in electrical contact with the mounting tab.

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,

enhancements, improvements, and other changes to its products and services at any time and to discontinue

any product or service without notice. Customers should obtain the latest relevant information before placing

orders and should verify that such information is current and complete. All products are sold subject to TI’s terms

and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI

deems necessary to support this warranty. Except where mandated by government requirements, testing of all

parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for

their products and applications using TI components. To minimize the risks associated with customer products

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