DC-DC Converter Control Circuits

MC34063A

FEATURES

●

OUTPUT SWITCH CURRENT IN EXCESS OF 1.5A

●

2% REFERENCE ACCURACY

●

LOW QUIESCENT CURRENT:2.5mA(TYP.)

●

OPERATING FROM 3V TO 40V

●

FREQUENCY OPERATION TO 100KHz

●

ACTIVE CURRENT LIMITING

●

MOISTURE SENSITIVITY LEVEL 3

●

MC34063AG is Halogen Free products

APPLICATION

●

Battery Chargers

●

NICs / Switches / Hubs

●

ADSL Modems

●

Negative Voltage Power Supplies

ORDERING INFORMATION

DESCRIPTION

The MC34063A series is a monolithic control circuit delivering the main functions for DC-DC voltage

converting.

The device contains an intermal temperature compensated reference, comparator, duty cycle controlled

oscillator with an active current limit circuit driver and high current output switch.

Output voltage is adjustable through two external resistors with a 2% reference accuracy.

Employing a minimum number of external components the MC34063A devices series is designed for

Step-Down, Step-Up and Voltage-lnverting applications.

May. 2009 - Rev. 1.2

HTC

Device

Package

MC34063AD

MC34063AGD

−

1 −

DIP-8

MC34063AN

SOP-8

8 SOP/ 8 DIP PIN Configulation

Comparator

Inverting

Input

Switch

Emitter

Timing

Capacitor

Ground

Ipk Sense

Vcc

Driver

Collector

Switch

Collector

1

2

3

4

8

7

6

5

SOP-8 PKG

DIP-8 PKG