L4925 데이터 시트보기 (PDF) - STMicroelectronics

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L4925

Very low drop voltage regulator

STMicroelectronics 

L4925

4

Application information

Application information

4.1

Supply voltage transients

High supply voltage transients can cause a reset output signal disturbance.

For supply voltage greater than 8 V the circuit shows a high immunity of the reset output

against supply transients of more than 100 V/ms. For supply voltage lower than 8 V, supply

transients of more than 0.4 V/ms. can cause a reset signal disturbance.

4.2

Application circuit

Figure 8. Application circuit diagram

VBAT

VS

CS

GND

Vz

PREREGULATOR

5V

+

-

REG

VREF

1.23V

Vz

2μ

RESET

L4925

= 2V

Vo

Co

CT

RES

Vout

RES

D95AT153

For stability: CS  1 µF; CO  10 µF; ESR  2.5  at 10 KHz

Recommended for application: CS = CO = 10 µF to 100 µF

Doc ID 1770 Rev 8

11/14

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