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SP6652EU Datasheet(PDF) 3 Page - Sipex Corporation |
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SP6652EU Datasheet(HTML) 3 Page - Sipex Corporation |
3 / 11 page 3 Date:5/25/04 SP6652 1A, High Efficiency, High Frequency Current Mode PWM Buck Regulator © Copyright 2004 Sipex Corporation PIN DESCRIPTION PIN NUMBER PIN NAME DESCRIPTION 1PGND Power Ground Pin. Synchronous rectifier current returns through this pin. 2SGND Internal Ground Pin. Control circuitry returns current to this pin. 3FB 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. 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\ Shutdown control input. Tie pin to VIN for normal operation, tie to ground for shutdown. TTL input threshold. 6 MODE Connect this pin to VIN to force PWM operation and to S GND for automatic PWM/PFM selection, for a better light load efficiency. 7 SYNC 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. 8SVIN Internal supply voltage. Control circuitry is powered from from this pin. Use an RC filter close to the pin to cut down supply noise. 9PVIN Supply voltage for the output driver stage. Inductor charging current passes through this pin. 10 LX Inductor switching node. Inductor tied between this pin and the output capacitor to create regulated output voltage. |
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