APL1431L Просмотр технического описания (PDF) - Anpec Electronics

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APL1431L

Low Voltage Adjustable Precision Shunt Regulator

Anpec Electronics 

APL1431L

Application Schematic

VIN

GND

RB

R1

VREF

R2

VO

APL431L

0 . 1 µF

Precision Voltage Reference

VIN

RB

VO

R1

APL431L

0 . 1 µF

VREF

R2

Precision Voltage Regulator

Notes for Application Circuits:

1) To improve the stability of output voltage , a 0.1µF capacitor between cathode and anode of APL431L

is strongly recommended.

2) Set VO according to the following equation:

VO= VREF (1+R1/ R2)+ IREF R1

3) Choose the value for R as follows:

•

B

The maximum limit for RB should be such that the cathode current( IK) is greater than the minimum

•

operating current (60µA) at VIN (MIN) .

The minimum limit for R should be such that the cathode current (I ) does not exceed 100mA under

B

K

all load conditions, and the instantaneous turn-on value for IK does not exceed 150mA . Both of the

following conditions must be met :

RB,MIN ≥ VIN(MAX) / 150mA ( to limit instantaneous turn-on IK)

RB,MIN ≥ VIN(MAX) - VO / IO (MIN) + 100mA (to limit IK under normal operating conditions)

Copyright  ANPEC Electronics Corp.

4

Rev. A.4 - May., 2003

www.anpec.com.tw

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