CP34063

1.5A,Step-Up/Down/Inverting Switching Regulators

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU ,

TAOYUAN, TAIWAN

Email: server@ceramate.com.tw

The CP34063 Series is a monolithic control circuit containing the

primary functions required for DC–to–DC converters. These devices

consist of an internal temperature compensated reference, comparator,

controlled duty cycle oscillator with an active current limit circuit,

driver and high current output switch. This series was specifically

designed to be incorporated in Step–Down and Step–Up and

Voltage–Inverting applications with a minimum number of external

components.

Figure 1. Representative Schematic Diagram

SQ

R

Q2

Q1

100

Comparator

+

-

1.25 V

Reference

Regulator

1

2

3

4

5

6

7

8

Drive

Collector

Sense

Comparator

Inverting

Input

Switch

Collector

Switch

Emitter

Timing

Capacitor

Gnd

(Bottom View)

This device contains 51 active transistors.

SOP–8

PDIP–8

1

8

1

8

PIN CONNECTIONS

1

2

3

4

6

7

8

1 -

Switch Collector

2 -

Switch Emitter

3 -

Timing Capacitor

4 -

Gnd

5 -

Comparator Inverting Input

6 -

Vcc

7 -

Ipk Sense

8 -

Driver Collector

5

Tel:886-3-3214525

Http: www.ceramate.com.tw

Fax:886-3-3521052

Page 1 of 10

Rev 1.

1 Jul.18,2003