MC34063 datasheet(1/15 Pages) STMICROELECTRONICS

部品番号	MC34063

部品情報	DC-DC CONVERTER CONTROL CIRCUITS

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MC34063A

MC34063E

DC-DC CONVERTER CONTROL CIRCUITS

®

March 2001

s

OUTPUT SWITCH CURRENT IN EXCESS OF

1.5A

s

2% REFERENCE ACCURACY

s

LOW QUIESCENT CURRENT: 2.5mA (TYP.)

s

OPERATING FROM 3V TO 40V

s

FREQUENCY OPERATION TO 100KHz

s

ACTIVE CURRENT LIMITING

DESCRIPTION

The MC34063A/E series is a monolithic control

circuit delivering the main functions for DC-DC

voltage converting.

The device contains an internal 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/E devices series is

designed

for

Step-Down,

Step-Up

and

Voltage-Inverting applications.

BLOCK DIAGRAM

DIP-8

SO-8

1/15

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