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MC34063A/MC33063A
SMPS Controller
Features
Operation from 3.0 to 40V input Short circuit current limiting Low standby current Output switch current of 1.5A without external transistors Output voltage adjustable Frequency of operation from 100Hz to 100KHz Step up, Step down or inverting switching regulators

Description
The MC34063A/MC33063A is a monolithic regulator sub system intended for use as DC to DC converter. This device contains a temperature compensated bandgap reference, a duty cycle control oscillator, driver and high current output switch. It can be used for step down, step up or inverting switching regulators as well as for series pass regulators.
8-DIP

1

8-SOP

1

Internal Block Diagram

Rev. 1.0.2
2001 Fairchild Semiconductor Corporation

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MC34063A DATASHEET