Pin configuration

ST750A

4/14

2

Pin configuration

Figure 2.

Pin connections (top view)

Table 1.

Pin description

Pin N°

Symbol

Name and function

1

SHDN

for normal operation (ON MODE)

2REF

Reference output voltage: (1.25V): Bypass to GND with a capacitor that does not exceed

47nF

3SS

Soft start: a capacitor between SS and GND provides soft-start and short-circuit

protections.

4CC

Compensation capacitor input: externally compensates the outer (voltage) feedback loop.

Connect to OUT with 330pF capacitor

5

IC

Internal connection: make no external connection to this pin

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 possible to the