L4901 Просмотр технического описания (PDF) - STMicroelectronics

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L4901

DUAL 5V REGULATOR WITH RESET

STMicroelectronics 

L4901A

PIN DESCRIPTION

N°

Name

Fun ction

1

Input 1 Low Quiescent Current 400mA Regulator Input.

2

Input 2 400mA regulator input.

3

Timing If Reg. 2 is switched-ON the delay capacitor is charged with a 10µA constant current. When Reg.

Capacitor 2 is switched-OFF the delay capacitor is decharged.

4

GND Common Ground.

5

Reset When pin 3 reaches 5V the reset output is switched high.

Output

Therefore

tRD

=

Ct

( 5V );

10µA

tRD (ms) = Ct (nF)

6 Output 2 5V – 400mA Regulator Output. Enabled if Vo 1 > VRT and VIN 2 > VIT. If Reg. 2 is switched-OFF

the C02 capacitor is discharged.

7 Output 1 5V – 400mA regulator output with Low leakage (in switch-OFF condition).

BLOCK DIAGRAM

SCHEMATIC DIAGRAM

2/10

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