Advanced Power

Electronics Corp.

APE8981

PIN DESCRIPTIONS

PIN SYMBOL

PIN DESCRIPTION

POK

Power OK Output Pin

APE8981MP-A: Internal pull low; HIGH for enable, LOW or floating for shutdown.

APE8981MP-B: Internal pull high; HIGH or floating for enable, LOW for shutdown.

VIN

Power input pin of the control circuitry. The pin is monitored for Power-On Reset

purpose.

NC

No Connect

VOUT

Output Voltage

FB

Feedback Pin

GND

GND Pin

BLOCK DIAGRAM

APE8981MP-A

APE8981MP-B

4

EN

Supply input for power conversion. The pin is monitored for Power-On Reset purpose.

VCNTL

-+

VIN

VOUT

GND

Error

Amp

EN

VCNTL

Soft -Start

And

Control Logic

Power- ON

Reset

Current

Limit

Thermal

Shutdown

Bandgap

FB

POK

Delay

POK

94%

N-MOSFET

10uA

Enable

-+

VIN

VOUT

GND

Error

Amp

EN

VCNTL

Soft -Start

And

Control Logic

Power- ON

Reset

Current

Limit

Thermal

Shutdown

Bandgap

FB

POK

Delay

POK

94%

N-MOSFET

10uA

Enable

.