Datasheet

ADP2380 Data Sheet
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 ............................................................ 5
Thermal Information ................................................................... 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ............................................. 7
Functional Block Diagram ............................................................ 12
Theory of Operation ...................................................................... 13
Control Scheme .......................................................................... 13
Internal Regulator (VREG) ....................................................... 13
Bootstrap Circuitry .................................................................... 13
Low-Side Driver .......................................................................... 13
Oscillator ..................................................................................... 13
Synchronization .......................................................................... 13
Enable and Soft Start .................................................................. 13
Power Good ................................................................................. 14
Peak Current-Limit and Short-Circuit Protection ................. 14
Overvoltage Protection (OVP) ................................................. 14
Undervoltage Lockout (UVLO) ............................................... 14
Thermal Shutdown ..................................................................... 14
Applications Information .............................................................. 15
Input Capacitor Selection .......................................................... 15
Output Voltage Setting .............................................................. 15
Voltage Conversion Limitations ............................................... 15
Inductor Selection ...................................................................... 15
Output Capacitor Selection....................................................... 17
Low-Side Power Device Selection ............................................ 17
Programming Input Voltage UVLO ........................................ 18
Compensation Design ............................................................... 18
ADIsimPower Design Tool ....................................................... 19
Design Example .............................................................................. 20
Output Voltage Setting .............................................................. 20
Frequency Setting ....................................................................... 20
Inductor Selection ...................................................................... 20
Output Capacitor Selection....................................................... 20
Low-Side MOSFET Selection ................................................... 21
Compensation Components ..................................................... 21
Soft Start Time Program ........................................................... 21
Input Capacitor Selection .......................................................... 21
Recommended External Components ........................................ 22
Circuit Board Layout Recommendations ................................... 24
Typical Applications Circuits ........................................................ 26
Outline Dimensions ....................................................................... 27
Ordering Guide .......................................................................... 27
REVISION HISTORY
12/12Revision 0: Initial Version