ADP2116

Rev. 0 | Page 2 of 36

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

Specifications..................................................................................... 3

 

Absolute Maximum Ratings............................................................ 5

 

ESD Caution.................................................................................. 5

 

Pin Configuration and Function Descriptions............................. 6

 

Typical Performance Characteristics ............................................. 8

 

Line and Load Regulation ........................................................... 9

 

Supply Current............................................................................ 13

 

Load Transient Response........................................................... 14

 

Basic Functionality ..................................................................... 15

 

Bode Plots.................................................................................... 18

 

Simplified Block Diagram ............................................................. 19

 

Theory of Operation ...................................................................... 20

 

Control Architecture.................................................................. 20

 

Undervoltage Lockout (UVLO) ............................................... 20

 

Enable/Disable Control ............................................................. 20

 

Soft Start ...................................................................................... 20

 

Power Good................................................................................. 21

 

Pulse Skip Mode ......................................................................... 21

 

Hiccup Mode Current Limit ..................................................... 22

 

Thermal Overload Protection .................................................. 22

 

Maximum Duty Cycle Operation ............................................ 22

 

Synchronization.......................................................................... 22

 

Converter Configuration............................................................... 23

 

Selecting the Output Voltage .................................................... 23

 

Setting the Oscillator Frequency .............................................. 24

 

Synchronization and CLKOUT................................................ 24

 

Operation Mode Configuration ............................................... 25

 

External Components Selection ................................................... 26

 

Input Capacitor Selection.......................................................... 26

 

VDD RC Filter ............................................................................ 26

 

Inductor Selection ...................................................................... 26

 

Output Capacitor Selection....................................................... 27

 

Control Loop Compensation.................................................... 28

 

Design Example .............................................................................. 29

 

Channel 1 Configuration and Components Selection .......... 29

 

Channel 2 Configuration and Components Selection .......... 30

 

System Configuration ................................................................ 31

 

Application Circuits ....................................................................... 32

 

Power Dissipation and Thermal Considerations ....................... 34

 

Circuit Board Layout Recommendations ................................... 35

 

Outline Dimensions ....................................................................... 36

 

Ordering Guide .......................................................................... 36

 

REVISION HISTORY

10/09—Revision 0: Initial Version