ADP2114

Rev. 0 | Page 2 of 40

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

 

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

 

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

 

Bode Plots.................................................................................... 19

 

Simplified Block Diagram ............................................................. 20

 

Theory of Operation ...................................................................... 21

 

Control Architecture.................................................................. 21

 

Undervoltage Lockout (UVLO) ............................................... 21

 

Enable/Disable Control ............................................................. 21

 

Soft Start ...................................................................................... 21

 

Power Good................................................................................. 22

 

Pulse Skip Mode ......................................................................... 22

 

Hiccup Mode Current Limit ..................................................... 23

 

Thermal Overload Protection................................................... 23

 

Maximum Duty Cycle Operation ............................................ 23

 

Synchronization.......................................................................... 23

 

Converter Configuration............................................................... 24

 

Selecting the Output Voltage .................................................... 24

 

Setting the Oscillator Frequency .............................................. 25

 

Synchronization and CLKOUT................................................ 25

 

Operation Mode Configuration ............................................... 26

 

External Components Selection ................................................... 27

 

Input Capacitor Selection.......................................................... 27

 

VDD RC Filter ............................................................................ 27

 

Inductor Selection ...................................................................... 27

 

Output Capacitor Selection....................................................... 28

 

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

 

Design Example .............................................................................. 30

 

Channel 1 Configuration and Components Selection .......... 30

 

Channel 2 Configuration and Components Selection .......... 31

 

System Configuration ................................................................ 32

 

Application Circuits ....................................................................... 33

 

Power Dissipation, Thermal Considerations.............................. 35

 

Circuit Board Layout Recommendations ................................... 36

 

Outline Dimensions ....................................................................... 37

 

Ordering Guide .......................................................................... 37

 

REVISION HISTORY

7/09—Revision 0: Initial Version