ADP2323

Data Sheet

Rev. A | Page 2 of 32

TABLE OF CONTENTS

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

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

Typical Application Circuit ............................................................. 1

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

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

Functional Block Diagram .............................................................. 3

Specifications..................................................................................... 4

Absolute Maximum Ratings............................................................ 6

Thermal Resistance ...................................................................... 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 9

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

Control Scheme .......................................................................... 15

PWM Mode................................................................................. 15

PFM Mode................................................................................... 15

Precision Enable/Shutdown ...................................................... 15

Separate Input Voltages ............................................................. 15

Internal Regulator (INTVCC).................................................. 15

Bootstrap Circuitry .................................................................... 16

Low-Side Driver.......................................................................... 16

Oscillator ..................................................................................... 16

Synchronization.......................................................................... 16

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

Peak Current-Limit and Short-Circuit Protection................. 16

Voltage Tracking......................................................................... 17

Parallel Operation....................................................................... 17

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

Overvoltage Protection.............................................................. 17

Undervoltage Lockout ............................................................... 18

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

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

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

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

Output Voltage Setting .............................................................. 19

Voltage Conversion Limitations............................................... 19

Current-Limit Setting ................................................................ 19

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

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

Low-Side Power Device Selection............................................ 21

Programming UVLO Input ...................................................... 21

Compensation Components Design ....................................... 21

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

Output Voltage Setting .............................................................. 23

Current-Limit Setting ................................................................ 23

Frequency Setting....................................................................... 23

Inductor Selection ...................................................................... 23

Output Capacitor Selection....................................................... 23

Low-Side MOSFET Selection ................................................... 24

Compensation Components..................................................... 24

Soft Start Time Programming .................................................. 24

Input Capacitor Selection.......................................................... 24

External Components Recommendation.................................... 25

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

Outline Dimensions....................................................................... 31

Ordering Guide .......................................................................... 31

REVISION HISTORY

6/12—Rev. 0 to Rev. A

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

Added ADIsimPower Design Tool Section................................. 19

7/11—Revision 0: Initial Version