LP2951 查看數據表（PDF） - Contek Microelectronics

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LP2951

100 mA LOW-DROPOUT VOLTAGE REGULATOR

Contek Microelectronics 

LP2950/2951

LINEARINTEGRATEDCIRCUIT

PARAMETER

Lower Threshold

Voltage

Hysteresis

Shutdown Input

PART NUMBER

TEST CONDITION

(Note 3)

(Note 3)

MIN. TYP.

15

MAX.

7.6

UNIT

%VO

mV

Input Logic Voltage

Shutdown Pin Input

Current

Regulator Output

Current Shutdown

Low(Regulator ON)

High(Regulator OFF)

Vshutdown=2.4V

1.3

2.0

30

Vshutdown=30V

450

Vshutdown>=2V,V IN<=30V,

3

Vout=0,

Feedback pin tied to 5V Tap.

V

0.70

50

mA

600

mA

10

mA

Note 1: Additional conditions for 8-pin versions are feedback tied to 5V Tap an Output tied to Output Sense

(V out=5V) and Vshutdown<=0.8V.

Note 2:Dropout Voltage is defined as the input to output differential at which the output voltage drops 100mV

below its nominal value measured at 1V differential.

Note 3:Comparator thresholds are expressed in terms of percentage value of voltage output.

APPLICATION CIRCUIT (10 Ampere Low Dropout Regulator)

CURRENT

LIMIT

SECTION

680 W

2N3906

4.7M W

20k W

220 W

0.033 m F

+V IN =V ou t+0.5V

0.05

470 W

Contek

D65H0

8

+V IN

5

10k W

ERROR

Contek LP2951

3 SD

FB

GND

4

Vout

1

7

47W

R1

1%

R2

+ V OUT 100m A

4.7 m F

100 m F

Vout=1.23V*(1+R1/R2)

For 5V output

use internal

resistors.Wire

and wire pin 2 to +V out

Fig.2

pin 6 to 7

Contek Microelectronics Co.,Ltd.

4

CONTEK

http://www.contek-ic.com E-mail:sales@contek-ic.com

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