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ST763A Datasheet(PDF) 3 Page - STMicroelectronics

Part No. ST763A
Description  3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERS
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST763A SERIES
3/10
CONNECTION DIAGRAM (top view)
PIN DESCRIPTION
Pin N°
Symbol
Name and Function
1
SHDN
Shutdown control (active low): If connected to GND the IC is in shutdown.
Connect to VCC for normal operation (ON MODE)
2
REF
Reference Output Voltage:(1.25V): Bypass to GND with 47nF capacitor
3
SS
Soft Start: a capacitor between SS and GND provides soft-start and short-circuit
protections.
4
CC
Compensation Capacitor Input: externally compensates the outer (voltage)
feedback loop. Connect to OUT with 330pF capacitor
5
OUT
Output Voltage Sense Input: provides regulation of feedback sensing. Connect to
3.3V output.
6
GND
Ground
7
LX
Switch Output. Drain of internal P-Channel Power MOSFET
8VCC
Supply Voltage Input. Bypass to GND with 1
µF ceramic capacitance and large
value electrolytic capacitor in parallel. The 1
µF capacitor must be as close as
possible to the GND and VCC pins




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