APR347

Document number: DS41207 Rev. 5 - 2

2 of 9

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December 2020

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APR347

Pin Descriptions

Pin Number

Pin Name

Function

1

AREF

Program a voltage reference with a resistor from AREF to GND, to enable synchronous rectification

MOSFET drive signal

2

GND

Ground

3

VDET

SR MOS drain-to-source voltage sense input, connected to drain pin of SR MOSFET through a resistor

4

VCC

Power supply, connected with system output

Input of internal LDO and system output voltage sensing circuit.

5

VDD

Internal power supply. It provides bias voltage for the internal logic circuit and the MOSFET driver.

Connect this pin to a capacitor.

6

DRISR

Synchronous rectification MOSFET Gate drive

Functional Block Diagram

VTHON

LEB

Time

VTHOFF

Test

Mode

Fault

Mode

Gate

Monitor

Integrator

∫(VDET-VCC)dt

VCC

IAREF

S

R

Q

S

R

Q

Drive

DRISR

AREF

VDET

VDD

GND

VCC

1

6

3

4

5

2

Light Load

Control

PLR

VDET

LDO

VREF

S1