CONNECTION DIAGRAM (top view)
ST763A SERIES
PIN DESCRIPTION
Pin N°
1
Symbol
SHDN
2
REF
3
SS
4
CC
5
OUT
6
GND
7
LX
8
VCC
Name and Function
Shutdown control (active low): If connected to GND the IC is in shutdown.
Connect to VCC for normal operation (ON MODE)
Reference Output Voltage:(1.25V): Bypass to GND with 47nF capacitor
Soft Start: a capacitor between SS and GND provides soft-start and short-circuit
protections.
Compensation Capacitor Input: externally compensates the outer (voltage)
feedback loop. Connect to OUT with 330pF capacitor
Output Voltage Sense Input: provides regulation of feedback sensing. Connect to
3.3V output.
Ground
Switch Output. Drain of internal P-Channel Power MOSFET
Supply Voltage Input. Bypass to GND with 1µF ceramic capacitance and large
value electrolytic capacitor in parallel. The 1µF capacitor must be as close as
possible to the GND and VCC pins
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