ADP3186

Rev. A | Page 2 of 24

TABLE OF CONTENTS

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

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

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

Functional Block Diagram .............................................................. 1

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

Test Circuits....................................................................................... 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

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

Theory of Operation ........................................................................ 9

Start-Up Sequence........................................................................ 9

Master Clock Frequency.............................................................. 9

Output Voltage Differential Sensing .......................................... 9

Output Current Sensing .............................................................. 9

Active Impedance Control Mode............................................. 10

Current Control Mode and Thermal Balance ........................ 10

Voltage Control Mode................................................................ 10

Soft Start ...................................................................................... 10

Current Limit, Short-Circuit, and Latch-Off Protection ...... 11

Dynamic VID.............................................................................. 11

Power Good Monitoring ........................................................... 12

Output Crowbar ......................................................................... 12

Output Enable and UVLO ........................................................ 12

Application Information................................................................ 14

Setting the Clock Frequency..................................................... 14

Soft Start and Current Limit Latch-Off Delay Times............ 14

Inductor Selection ...................................................................... 14

Designing an Inductor............................................................... 15

Selecting a Standard Inductor .............................................. 15

Output Droop Resistance.......................................................... 15

Inductor DCR Temperature Correction ................................. 16

Output Offset .............................................................................. 16

COUT Selection ............................................................................. 17

Power MOSFETs......................................................................... 17

Ramp Resistor Selection............................................................ 18

COMP Pin Ramp ....................................................................... 19

Current Limit Setpoint .............................................................. 19

Feedback Loop Compensation Design.................................... 19

CIN Selection and Input Current di/dt Reduction.................. 20

Tuning Procedure....................................................................... 21

DC Loadline Setting .............................................................. 21

AC Loadline Setting............................................................... 21

Initial Transient Setting ......................................................... 22

Layout and Component Placement ......................................... 22

General Recommendations .................................................. 22

Power Circuitry Recommendations .................................... 23

Signal Circuitry Recommendations .................................... 23

Outline Dimensions ....................................................................... 24

Ordering Guide .......................................................................... 24

REVISION HISTORY

3/06—Rev. 0 to Rev. A

Updated ADP3110 to ADP3110A................................. Universal

Changes to Table 1.......................................................................... 3

Added QSOP Package.................................................................. 24

Updated Ordering Guide............................................................. 24

8/04—Revision Sp0: Initial Version