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SC2602L

Synchronous Voltage Mode Controller

for Distributed Power Supply

POWER MANAGEMENT

Applications

Revision: January 05, 2006

Typical Application Circuit

R

Output voltage can be programmed as low as 0.8V

On-chip power good and OVP functions

Small size with minimum external components

Soft Start

Enable function

SO-14 package is fully WEEE and RoHS compliant

Microprocessor core supply

Low cost synchronous applications

Voltage Regulator Modules (VRM)

DDR termination supplies

Networking power supplies

Sequenced power supplies

The SC2602L is low-cost, full featured, synchronous volt-

age-mode controller designed for use in single ended

power supply applications where efficiency is of primary

concern. Synchronous operation allows for the elimina-

tion of heat sinks in many applications. The SC2602L is

ideal for implementing DC/DC converters needed to

power advanced microprocessors in low cost systems,

or in distributed power applications where efficiency is

important. Internal level-shift, high-side drive circuitry, and

preset shoot-through control, allows the use of inexpen-

sive N-channel power MOSFETs.

SC2602L features include temperature compensated

voltage reference, triangle wave oscillator and current

sense comparator circuitry. Power good signaling, shut-

down, and over voltage protection are also provided.

The SC2602L operates at a fixed 200kHz which is for

optimum compromise between efficiency, external com-

ponent size, and cost.

Two SC2602L can be used together to sequence two

voltage regulators for power up in telecom systems. The

power good of the first SC2602L connected to the en-

able of the second SC2602L makes this possible.

Figure 1. Typical distributed power supply

Synchronous operation for high efficiency (95%)

Features

R2

R7

R3

C3

+

C2

Q2

Q1

L1

C6

SS/SHDN

R6

C10

+

C9

R8

5V IN

12V IN

R1

C1

C8

R4

PWRGD

V_pullup

OVP

2.5V OUT

GND

GND

C5

U1

SC2602L

VCC

1

PWRGD

2

OVP

3

OCSET

4

PHASE

5

DH

6

PGND

7

DL

8

BSTL

9

BSTH

10

COMP

12

SS/SHDN

13

GND

14

SENSE

11

R5

C7

C4

D1

Description