ADP2442ACPZ-R7 datasheet(2/36 Pages) AD

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ADP2442

Data Sheet

Rev. B | Page 2 of 36

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

Efficiency in Forced Fixed Frequency Mode............................ 7

Efficiency in Pulse Skip Mode .................................................... 8

Internal Block Diagram ................................................................. 15

Theory of Operation ...................................................................... 16

Control Architecure ................................................................... 16

Adjustable Frequency................................................................. 17

Power Good................................................................................. 17

Mode of Operation..................................................................... 17

External Synchronization.......................................................... 17

Soft Start ...................................................................................... 17

Undervoltage Lockout ............................................................... 17

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

Current-Limit and Short-Circuit Protection.............................. 18

Thermal Shutdown .................................................................... 18

Applications Information .............................................................. 19

ADIsimPower Design Tool ....................................................... 19

Selecting the Output Voltage .................................................... 19

Setting the Switching Frequency.............................................. 19

External Component Selection ................................................ 20

Boost Capacitor .......................................................................... 22

VCC Capacitor............................................................................ 22

Loop Compensation .................................................................. 22

Large Signal Analysis of the Loop Compensation................. 22

Design Example .............................................................................. 24

Configuration and Components Selection ............................. 24

System Configuration................................................................ 25

Typical Application Circuits ......................................................... 26

Design Example.......................................................................... 26

Other Typical Circuit Configurations ..................................... 27

Power Dissipation and Thermal Considerations ....................... 31

Power Dissipation....................................................................... 31

Thermal Considerations............................................................ 31

Evaluation Board Thermal Performance ................................ 32

Circuit Board Layout Recommendations ................................... 33

Outline Dimensions....................................................................... 34

Ordering Guide .......................................................................... 34

REVISION HISTORY

8/15—Rev. A to Rev. B

Changes to Figure 51...................................................................... 15

5/14—Rev. 0 to Rev. A

Change to Features Section ............................................................. 1

11/12—Revision 0: Initial Version

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