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600kHz/200kHz

Step-Down DC/DC Converter

POWER MANAGEMENT

Description

The SC2612 is a voltage mode switcher designed for low

cost, 鈥減oint of use鈥?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.

SC2612A/C

Features

u

u

u

u

u

u

Operating frequency of 600kHz or 200kHz

Input supply of 3V to 8V

0.5A Drive current for up to 10A output

Output voltages down to 0.8V

Overcurrent protection and soft start

MSOP-8 package

Applications

u

Graphics IC Power supplies

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Embedded, low cost, high efficiency converters

Typical Application Circuit

12V IN

3.3V IN

R1

C10

C1

C2

U2

4

1

2

C5

C7

R9

C9

R10

5

VCC

BST

8

7

6

3

R2

R3

Q2

L1

1.5V OUT

Q3

R6

COMP DH

SS/EN

GND

DL

FB

SC2612

C3

August 18, 2004

1

www.semtech.com

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• SC261D
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• SC261E
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