POWER MANAGEMENT

1

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SC2612A/C

600kHz/200kHz

Step-Down DC/DC Converter

Features

Applications

August 18, 2004

Typical Application Circuit

Description

The SC2612 is a voltage mode switcher designed for low

cost, “point of use” voltage conversion. SC2612 is avail-

able with fixed switching frequencies of 600kHz

(SC2612A) and 200kHz (SC2612C).

The SC2612 has soft start and enable functions and is

short circuit protected. The output of the switcher may

be set anywhere between 0.8V and 75% of Vin. Short

circuit protection is disabled during start-up to allow the

output capacitors time to fully charge.

Q3

R6

L1

R2

U2

SC2612

4

7

8

3

6

2

1

5

VCC

DH

BST

FB

DL

SS/EN

COMP

GND

C2

R3

R1

R9

C7

C9

C3

R10

C1

1.5V OUT

Q2

12V IN

3.3V IN

C10

C5