SP6652 Datasheet, PDF (3/11 Pages) Sipex Corporation – 1A, High Efficiency, High Frequency Current Mode PWM Buck Regulator

PIN NUMBER
1
2
3
4
5
6
7
8
9
10
PIN NAME
P_GND
S_GND
FB
COMP
SD\
MODE
SYNC
S_VIN
P_VIN
LX
PIN DESCRIPTION
DESCRIPTION
Power Ground Pin. Synchronous rectifier current returns through this pin.
Internal Ground Pin. Control circuitry returns current to this pin.
External feedback network input connection. Connect a resistor from
to ground and from FB to output voltage to control the output voltage.
Regulation point at FB=0.75V Typical.
Compensation pin for error loop. Connect an R and C in series to
ground to control open loop pole and zero.
Shutdown control input. Tie pin to VIN for normal operation, tie to
ground for shutdown. TTL input threshold.
Connect this pin to VIN to force PWM operation and to S_GND for
automatic PWM/PFM selection, for a better light load efficiency.
An external clock signal can be connected to this to synchronize the
switching frequency. The part runs in PWM mode in the precence of a
sync clock.
Internal supply voltage. Control circuitry is powered from from this pin.
Use an RC filter close to the pin to cut down supply noise.
Supply voltage for the output driver stage. Inductor charging current
passes through this pin.
Inductor switching node. Inductor tied between this pin and the output
capacitor to create regulated output voltage.
Date:5/25/04
SP6652 1A, High Efficiency, High Frequency Current Mode PWM Buck Regulator
3
© Copyright 2004 Sipex Corporation