ADP2441

Data Sheet

Rev. A | Page 2 of 32

TABLE OF CONTENTS

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

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

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

Typical Circuit Configuration......................................................... 1

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

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

Absolute Maximum Ratings............................................................ 5

Thermal Resistance ...................................................................... 5

ESD Caution.................................................................................. 5

Pin Configuration and Function Descriptions............................. 6

Typical Performance Characteristics ............................................. 7

Internal Block Diagram ................................................................. 14

Theory of Operation ...................................................................... 15

Control Architecure ................................................................... 15

Adjustable Frequency................................................................. 16

Power Good................................................................................. 16

Soft Start ...................................................................................... 16

Tracking ....................................................................................... 16

Undervoltage Lockout (UVLO) ............................................... 17

Precision Enable/Shutdown ...................................................... 17

Current-Limit and Short-Circuit Protection .......................... 17

Thermal Shutdown..................................................................... 17

Applications Information .............................................................. 18

Selecting the Output Voltage .................................................... 18

Setting the Switching Frequency.............................................. 18

Soft Start ...................................................................................... 19

External Components Selection............................................... 19

Boost Capacitor .......................................................................... 21

VCC Capacitor............................................................................ 21

Loop Compensation .................................................................. 21

Large Signal Analysis of the Loop Compensation................. 21

Design Example .............................................................................. 23

Configuration and Components Selection ............................. 23

System Configuration ................................................................ 24

Typical Application Circuits ......................................................... 25

Design Example.......................................................................... 25

Other Typical Circuit Configurations ..................................... 26

Power Dissipation and Thermal Considerations ....................... 29

Power Dissipation....................................................................... 29

Thermal Considerations............................................................ 29

Evaluation Board Thermal Performance .................................... 30

Circuit Board Layout Recommendations ................................... 31

Outline Dimensions ....................................................................... 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

11/12—Rev. 0 to Rev. A

Changes to Figure 1.......................................................................... 1

Changes to Pin 3 and Pin 5 Descriptions ...................................... 6

Changes to Boost Capacitor Section............................................ 21

Changes to Figure 66...................................................................... 31

Changes to Ordering Guide .......................................................... 32

6/12—Revision 0: Initial Version