AP3401

Document number: DS37389 Rev. 2 - 2

2 of 11

www.diodes.com

June 2016

© Diodes Incorporated

AP3401

Typical Applications Circuit

R1

R2

VIN

EN

LX

FB

L1 2.2

mH

GND

10

mF

ON

OFF

C1

22pF

300k

150k

PG

10

mF

100k

Pin Descriptions

Pin Number

Pin Name

Function

TSOT26

U-DFN2020-6

(Type J)

1

1

EN

Enable control input. Force this pin voltage above 1.5V enables the chip, and

below 0.4V shuts down the device

2

5

GND

Ground pin

3

4

LX

The drains of the internal main and synchronous power MOSFET

4

3

VIN

Bias supply. Chip main power supply pin

5

2

PG

Power good indicator, open drain output. PG is pulled up to VIN when the

output voltage is within 20% of the regulation level, otherwise it is low

6

6

FB

Feedback voltage to internal error amplifier, the threshold voltage is 0.6V