ADP2291

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TABLE OF CONTENTS

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

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

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

Pin Configuration And Functional Descriptions......................... 6

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

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

Precharge Mode .......................................................................... 10

End-of-Charge Mode................................................................. 10

Shutdown Mode.......................................................................... 10

Charge Restart............................................................................. 10

Programmable Timer................................................................. 10

Charge Status Indicator ............................................................. 10

Automatic Reverse Isolation ..................................................... 10

Overshoot Protection................................................................. 10

Power Supply Checks ................................................................. 10

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

Application Information................................................................ 12

Setting the Maximum Charge Current.................................... 12

Setting the Maximum Charge Time ........................................ 12

External Capacitors.................................................................... 12

Reverse Input Protection........................................................... 12

External Pass Transistor ............................................................ 13

Typical Application Circuit ....................................................... 14

EOC Terminates Charging........................................................ 14

Selectable Charge Current......................................................... 14

Thermal Protection.................................................................... 14

Printed Circuit Board Layout Considerations........................ 16

LFSCP Layout Considerations.................................................. 16

Outline Dimensions ....................................................................... 18

Ordering Guide .......................................................................... 18

REVISION HISTORY

10/04—Initial Version: Revision 0