ST730A

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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.

2

REF

Reference Output Voltage: (1.25V): Bypass to GND with a capacitor that does not

exceed 47nF

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

5V output.

6

GND

Ground

7

LX

Switch Output. Drain of internal P-Channel Power MOSFET

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