ADP2109

Data Sheet

Rev. B | Page 2 of 16

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

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

Typical Applications Circuit............................................................ 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Input and Output Capacitor, Recommended Specifications.. 3

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

Thermal Resistance ...................................................................... 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Typical Performance Characteristics ............................................. 6

Theory of Operation ...................................................................... 10

Control Scheme .......................................................................... 10

PWM Mode................................................................................. 10

Power Save Mode........................................................................ 10

Enable/Shutdown ....................................................................... 11

Discharge Switch ........................................................................ 11

Short-Circuit Protection............................................................ 11

Undervoltage Lockout ............................................................... 11

Thermal Protection.................................................................... 11

Soft Start ...................................................................................... 11

Current Limit.............................................................................. 11

100% Duty Operation................................................................ 11

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

ADIsimPower Design Tool ....................................................... 12

External Component Selection ................................................ 12

Thermal Considerations............................................................ 13

PCB Layout Guidelines.............................................................. 13

Evaluation Board ............................................................................ 14

Outline Dimensions....................................................................... 15

Ordering Guide .......................................................................... 15

REVISION HISTORY

7/12—Rev. A to Rev B

Changes to Features Section.............................................................1

Added ADIsimPower Design Tool Section..................................12

4/10—Rev. 0 to Rev. A

Changes to Ordering Guide .......................................................... 15

4/09—Revision 0: Initial Version