ADPL12002/ADPL12003

20V, 2.5A/3.5A, Fully Integrated Synchronous

Buck Converter

www.analog.com

Analog Devices | 3

TABLE OF CONTENTS

General Description ............................................................................................................................................................1

Key Applications .................................................................................................................................................................1

Benefits and Features.........................................................................................................................................................1

Simplified Block Diagram ....................................................................................................................................................2

Absolute Maximum Ratings ...............................................................................................................................................4

Package Information ...........................................................................................................................................................4

Electrical Characteristics.....................................................................................................................................................5

Typical Operating Characteristics .......................................................................................................................................7

Pin Configurations...............................................................................................................................................................9

Pin Descriptions ..................................................................................................................................................................9

Detailed Description..........................................................................................................................................................10

Linear Regulator Output (BIAS) ....................................................................................................................................10

System Enable (EN)......................................................................................................................................................10

Synchronization Input (SYNC) ......................................................................................................................................10

Soft-Start .......................................................................................................................................................................10

Spread Spectrum ..........................................................................................................................................................10

Power-Good Output (PGOOD)......................................................................................................................................10

Overcurrent and Short-Circuit Protection ......................................................................................................................10

Thermal Shutdown ........................................................................................................................................................11

Overvoltage Protection..................................................................................................................................................11

Applications Information....................................................................................................................................................12

Setting the Output Voltage ............................................................................................................................................12

Input Capacitor ..............................................................................................................................................................12

Output Capacitor ...........................................................................................................................................................13

Inductor Selection..........................................................................................................................................................15

PCB Layout Guidelines .................................................................................................................................................16

Typical Application Circuits ...............................................................................................................................................18

Ordering Information .........................................................................................................................................................19