Copyright

© ANPEC Electronics Corp.

Rev. A.1 - Aug., 2012

APL3521

www.anpec.com.tw

9

Pin Description

PIN

NO.

SOT-23-5

NAME

FUNCTION

1

VOUT

Output Voltage Pin. The output voltage follows the input voltage. When ENB is high or EN is

low the output voltage is discharged by an internal resistor.

2

GND

Ground

EN

(APL3521

Enable Input. Pull this pin to high to enable the device and pull this pin to low to disable

device. The EN pin cannot be left floating.

3

ENB

(APL3521

Enable Input. Pull this pin to high to disable the device and pull this pin to low to enable

device. The ENB pin cannot be left floating.

4

NC

Internally not connected.

5

VIN

Power Supply Input. Connect this pin to external DC supply.

-

NC

Internally not connected.

Block Diagram

Gate Driver and

Control Logic

UVL

O

VIN

VOUT

Charg

e

Pump

EN/

ENB

OTP

GND

Current

-Limit

Soft-Start