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FEATURES

1

2

3

4

8

7

6

5

Switch Collector

Switch Emitter

Timing Capacitor

GND

Driver Collector

Comparator Inverting Input

D (SOIC) OR P (PDIP) PACKAGE

(TOP VIEW)

DRJ (QFN) PACKAGE

(TOP VIEW)

Comparator Inverting Input

Switch Collector

2

3

4

1

8

7

6

5

Switch Emitter

Timing Capacitor

GND

Driver Collector

†

DESCRIPTION/ORDERING INFORMATION

MC33063A, MC34063A

1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS

SLLS636J – DECEMBER 2004 – REVISED OCTOBER 2005

•

Wide Input Voltage Range

…3 V to 40 V

•

Precision Internal Reference

…2%

•

High Output Switch Current

…Up to 1.5 A

•

Short-Circuit Current Limiting

•

Adjustable Output Voltage

•

Low Standby Current

•

Oscillator Frequency

…Up to 100 kHz

The MC33063A and MC34063A are easy-to-use ICs containing all the primary circuitry needed for building

simple dc-dc converters. These devices primarily consist of an internal temperature-compensated reference, a

comparator, an oscillator, a PWM controller with active current limiting, a driver, and a high-current output switch.

Thus, the devices require minimal external components to build converters in the boost, buck, and inverting

topologies.

The MC33063A is characterized for operation from –40

°C to 85°C, while the MC34063A is characterized for

operation from 0

°C to 70°C.

ORDERING INFORMATION

ORDERABLE PART NUMBER

TOP-SIDE MARKING

PDIP – P

Tube of 50

MC33063AP

MC33063AP

QFN – DRJ

Reel of 1000

MC33063ADRJR

PREVIEW

–40

°C to 85°C

Tube of 75

MC33063AD

SOIC – D

M33063A

Reel of 2500

MC33063ADR

PDIP – P

Tube of 50

MC34063AP

MC34063AP

QFN – DRJ

Reel of 1000

MC34063ADRJR

PREVIEW

0

°C to 70°C

Tube of 75

MC34063AD

SOIC – D

M34063A

Reel of 2500

MC34063ADR

(1)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.