MCP1603T-150I/MC 参数 Datasheet PDF下载

MCP1603

DC CHARACTERISTICS (CONTINUED)

Electrical Characteristics:

Unless otherwise indicated, V

IN

= SHDN = 3.6V, C

OUT

= C

IN

= 4.7 µF, L = 4.7 µH, V

OUT

(ADJ) = 1.8V,

I

OUT

= 100 mA, T

A

= +25°C.

Boldface

specifications apply over the T

A

range of -40°C to +85°C.

Parameters

Output Characteristics

Adjustable Output Voltage Range

Reference Feedback Voltage

Reference Feedback Voltage

Tolerance

Feedback Input Bias Current

Output Voltage Tolerance Fixed

Line Regulation

Load Regulation

Internal Oscillator Frequency

Start Up Time

R

DSon

P-Channel

R

DSon

N-Channel

L

X

Pin Leakage Current

Positive Current Limit Threshold

Note 1:

2:

3:

4:

Sym

V

OUT

V

FB

Min

0.8

—

-3.0

-2.5

Typ

—

0.8

—

—

0.1

V

R

V

R

0.3

0.35

2.0

0.6

500

500

±0.1

860

Max

4.5

—

+3.0

+2.5

—

+3.0%

+2.5

—

—

2.8

—

—

—

1.0

—

Units

V

V

%

%

nA

%

%

%/V

%

MHz

ms

mΩ

mΩ

µA

mA

Conditions

T

A

= -40°C to +25°C

T

A

= +25°C to +85°C

T

A

= -40°C to +25°C,

T

A

= +25°C to +85°C,

V

IN

= V

R

+ 1V to 5.5V,

I

OUT

= 100 mA

V

IN

= V

R

+1.5V,

I

LOAD

= 100 mA to 500 mA

T

R

= 10% to 90%

I

P

= 100 mA

I

N

= 100 mA

SHDN = 0V, V

IN

= 5.5V,

L

X

= 0V, L

X

= 5.5V

I

VFB

V

OUT

V

OUT

V

LINE-

REG

—

-3.0%

-2.5

—

—

1.5

—

—

—

-1.0

—

V

LOAD-

REG

F

OSC

T

SS

R

DSon-P

R

DSon-N

I

LX

+I

LX(MAX)

5:

6:

The minimum V

IN

has to meet two conditions: V

IN

≥

2.7V and V

IN

≥

V

OUT

+ 0.5V.

Reference Feedback Voltage Tolerance applies to adjustable output voltage setting.

V

R

is the output voltage setting.

The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable

temperature and the thermal resistance from junction to air (i.e. T

A

, T

J

,

θ

JA

). Exceeding the maximum

allowable power dissipation causes the device to initiate thermal shutdown.

The internal MOSFET switches have an integral diode from the L

X

pin to the V

IN

pin, and from the L

X

pin

to the GND pin. In cases where these diodes are forward-biased, the package power dissipation limits

must be adhered to. Thermal protection is not able to limit the junction temperature for these cases.

The current limit threshold is a cycle-by-cycle peak current limit.

©

2007 Microchip Technology Inc.

DS22042A-page 5