Datasheet

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