3

May25-07 RevH

SP6652 1A, High Efficiency, Current Mode PWM Buck Regulator

© 2007 Sipex Corporation

pin Description

SP6652

10 Pin MSOP

10

9

8

7

6

LX

P

SYNC

MODE

FB

COMP

SD

1

2

3

4

5

VIN

SP6652

10 Pin DFN

10

9

8

7

6

1

2

3

4

5

P

GND

FB

COMP

SD

LX

P

VIN

S

VIN

SYNC

MODE

Pin

Number

pin

NAME

Description



Power Ground Pin. Synchronous rectifier current returns through

this pin.



Internal Ground Pin. Control circuitry returns current to this pin.

3

FB

External feedback network input connection. Connect a resistor from

Regulation point at FB = 0.8V Typical.

4

COMP

Compensation pin for error loop. Connect an R and C in series to

ground to control open loop pole and zero.

5

SD

ground for shutdown. TTL input threshold.

6

MODE

7

SYNC

An external clock signal can be connected to this pin to synchronize

the switching frequency.

8

Internal supply voltage. Control circuitry is powered from from this

pin. Use an RC filter close to the pin to cut down supply noise.

9

Supply voltage for the output driver stage. Inductor charging current

passes through this pin.

0

LX

Inductor switching node. Inductor tied between this pin and the

output capacitor to create regulated output voltage.