Copyright

© ANPEC Electronics Corp.

Rev. A.5 - Jan., 2018

www.anpec.com.tw

5

APW7251/A

Pin Description

TDFN2x2-12

NAME

FUNCTION

1

LDO2

Regulator output pin. Output Voltage is 3.3V

2

VIN_L

Supply voltage pin.

3

LDO1

Regulator output pin. Output Voltage is 1.8V

4

EN_LDO

Enable control pin. Pulling this pin to ground forces the device into shutdown mode

reducing the supply current to less than 1

µA. This pin should not be left floating.

5

EN_PWM

Enable control pin. Pulling this pin to ground forces the device into shutdown mode

reducing the supply current to less than 1

µA. This pin should not be left floating.

6, 11

GND

Signal Ground. Connecting this pin to PGND.

7

VIN_P

Supply voltage pin.

8

LX

Switch Pin. Connect this pin to inductor/diode here.

9

PGND

Power Ground of the Low-Side Gate Driver. Use a separate track to connect this pin to

Source of the low-side MOSFET. The Source of the low-side MOSFET must be

connected to system ground with very low impedance. Connecting this pin to GND.

10

VOUT

Output Sense Pin. An internal divider sets the output voltage of boost converter at 13.5V.

Connect the output of the boost converter to VOUT pin to form a feedback loop.

12

POK

Power Good Output. Connecting a resistor to supply voltage pin. This pin should not be

left floating.