©2002 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev. 1.0.1

Features

• Output Currents up to 0.5A (Output1 & 2)

• Output Current up to 1A with External Transistor

(Output3)

• Fixed Precision Output 1 Voltage 5.1V ±2%

• Fixed Precision Output 2 Voltage 8V ±2% (KA7630)

• Fixed Precision Output 2 Voltage 9V ±2% (KA7631)

• Control Signal Generator for Output 3 Voltage (12V ±2%)

• Reset Facility for Output Voltage1

• Output 2,3 with Disable by TTL Input

• Current Limit Protection at Each Output

• Thermal Shut Down

Description

The KA7630/KA7631 is a multi-output positive voltage

regulator designed to provide fixed precision output voltages

of 5.1V, 8V (7630) / 9V(7631) at current up to 0.5Aand 12V

at current up to 1A with external PNP transistor.

An internal reset circuit generates a reset pulse when the

output 1 decreases below the regulated value. Output2 & 3

can be disabled by TTL input. Protection features include

over voltage protection, short circuit protection and thermal

shutdown.

10-SIP H/S

Internal Block Diagram

Bandgap

Reference

+

-

OVP

SCP

+

-

OVP

SCP

+

-

+

-

SCP

+

-

SW

Thermal

Shut Down

Output 2,3

4

8

9

3

6

7

10

5

2

1

1.4V

Vsys

10uA

Vin1

Vin2

Output 1

Output 2

Disable

GND

Output3

Control

DEL.CAP

100nF

A614 "Y"

Vin1

Vin2

+

-

RESET

10K

50mV

2.5V

Cd

KA7630/KA7631

Fixed Multi-Output Regulator