ADP2325
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Overvoltage Protection.............................................................. 19
Undervoltage Lockout ............................................................... 19
Thermal Shutdown .................................................................... 19
Applications Information .............................................................. 20
Input Capacitor Selection.......................................................... 20
Output Voltage Setting .............................................................. 20
Voltage Conversion Limitations............................................... 20
Current-Limit Setting ................................................................ 20
Inductor Selection ...................................................................... 20
Output Capacitor Selection....................................................... 21
Low-Side Power Device Selection............................................ 22
Programming UVLO Input ...................................................... 22
Compensation Components Design ....................................... 22
Design Example.............................................................................. 24
Output Voltage Setting .............................................................. 24
Current-Limit Setting ................................................................ 24
Frequency Setting....................................................................... 24
Inductor Selection ...................................................................... 24
Output Capacitor Selection....................................................... 24
Low-Side MOSFET Selection ................................................... 25
Compensation Components..................................................... 25
Soft Start Time Programming .................................................. 26
Input Capacitor Selection.......................................................... 26
External Components Recommendations.................................. 27
Typical Application Circuits ......................................................... 28
Packaging and Ordering Information ......................................... 32
Outline Dimensions................................................................... 32
Ordering Guide .......................................................................... 32
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 ...................................................................... 16
Control Scheme .......................................................................... 16
PWM Mode................................................................................. 16
PFM Mode................................................................................... 16
Precision Enable/Shutdown ...................................................... 16
Separate Input Voltages ............................................................. 16
Internal Regulator (INTVCC).................................................. 16
Bootstrap Circuitry .................................................................... 17
Low-Side Driver.......................................................................... 17
Oscillator ..................................................................................... 17
Synchronization.......................................................................... 17
Soft Start ...................................................................................... 17
Peak Current-Limit and Short-Circuit Protection................. 17
Voltage Tracking......................................................................... 18
Parallel Operation....................................................................... 18
Power Good................................................................................. 19
REVISION HISTORY
2/12—Revision 0: Initial Version
Rev. 0 | Page 2 of 32
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