ADP2302/ADP2303

Rev. 0 | Page 2 of 28

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

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

 

Functional Block Diagram ............................................................ 13

 

Theory of Operation ...................................................................... 14

 

Basic Operation .......................................................................... 14

 

PWM Mode................................................................................. 14

 

Power Saving Mode.................................................................... 14

 

Bootstrap Circuitry .................................................................... 14

 

Precision Enable ......................................................................... 14

 

Integrated Soft Start ................................................................... 14

 

Current Limit .............................................................................. 14

 

Short-Circuit Protection............................................................ 14

 

Undervoltage Lockout (UVLO) ............................................... 15

 

Thermal Shutdown (TSD)......................................................... 15

 

Overvoltage Protection (OVP)................................................. 15

 

Power Good ................................................................................ 15

 

Control Loop............................................................................... 15

 

Applications Information .............................................................. 16

 

Programming Output Voltage .................................................. 16

 

Voltage Conversion Limitations............................................... 16

 

Low Input Voltage Considerations .......................................... 17

 

Programming the Precision Enable ......................................... 17

 

Inductor ....................................................................................... 17

 

Catch Diode ................................................................................ 18

 

Input Capacitor........................................................................... 19

 

Output Capacitor........................................................................ 19

 

Thermal Consideration ............................................................. 19

 

Design Example .............................................................................. 20

 

Catch Diode Selection ............................................................... 20

 

Inductor Selection ...................................................................... 20

 

Output Capacitor Selection....................................................... 20

 

Resistive Voltage Divider Selection.......................................... 20

 

Circuit Board Layout Recommendations ................................... 22

 

Typical Application Circuits ......................................................... 23

 

Outline Dimensions ....................................................................... 26

 

Ordering Guide .......................................................................... 26

 

REVISION HISTORY

7/10—Revision 0: Initial Version