Datasheet

ADP2302/ADP2303 Data Sheet
Rev. A | 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
ADIsimPower Design Tool ....................................................... 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
6/12—Rev. 0 to Rev. A
Change to Features Section ............................................................. 1
Added ADIsimPower Design Tool Section ................................. 16
Change to Voltage Conversion Limitations Section .................. 16
Updated Outline Dimensions ....................................................... 26
Changes to Ordering Guide .......................................................... 26
7/10—Revision 0: Initial Version