TL497A

SWITCHING VOLTAGE REGULATORS

SLVS009D – JUNE 1976 – REVISED JULY 1999

2

POST OFFICE BOX 655303

AVAILABLE OPTIONS

PACKAGED DEVICES

CHIP

TA

SMALL-OUTLINE

(D)

PLASTIC DIP

(N)

SHRINK

SMALL-OUTLINE

(PW)

CHIP

FORM

(Y)

0

°C to 70°C

TL497ACD

TL497ACN

TL497ACPW

TL497AY

–40

°C to 85°C

TL497AID

TL497AIN

—

—

The D and PW packages are only taped and reeled. Add the suffix R to the device type (e.g.,

TL497ACPWR). Chip forms are tested at 25

°C.

functional block diagram

BASE†

11

12

BASE DRIVE†

CUR LIM SENS

FREQ CONTROL

INHIBIT

SUBSTRATE

COMP INPUT

CATHODE

Current

Limit

Sense

13

3

2

1

4

6

1.2-V

Reference

10

8

7

COL OUT

EMIT OUT

ANODE

Oscillator

† BASE and BASE DRIVE are used for device testing only. They normally are not used in circuit applications of the device.