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−

+

Q

S

1.25-V

Reference

Regulator

R

Oscillator

Q2

Q1

Switch

Collector

4

Switch

Emitter

Timing

Capacitor

GND

3

2

1

8

7

6

5

Comparator

Inverting Input

Sense

Drive

Collector

100

Ω

Absolute Maximum Ratings

(1)

MC33063A, MC34063A

1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS

SLLS636J – DECEMBER 2004 – REVISED OCTOBER 2005

FUNCTIONAL BLOCK DIAGRAM

over operating free-air temperature range (unless otherwise noted)

MIN

MAX

UNIT

Supply voltage

40

V

Comparator Inverting Input voltage range

–0.3

40

V

Switch Collector voltage

40

V

Switch Emitter voltage

40

V

Switch Collector to Switch Emitter voltage

40

V

Driver Collector voltage

40

V

Driver Collector current

100

mA

Switch current

1.5

A

D package

97

θ

JA

DRJ package

TBD

°C/W

P package

85

Operating virtual junction temperature

150

°C

Storage temperature range

–65

150

°C

(1)

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating

conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2)

(3)

The package thermal impedance is calculated in accordance with JESD 51-7.

2