ADP3193A

Rev. 0 | Page 2 of 32

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

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

Typical Performance Characteristics ............................................. 7

Test Circuits....................................................................................... 8

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

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

Phase Detection Sequence........................................................... 9

Master Clock Frequency............................................................ 10

Output Voltage Differential Sensing ........................................ 10

Output Current Sensing ............................................................ 10

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

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

Current Reference ...................................................................... 11

Fast Enhanced PWM Mode ...................................................... 11

Delay Timer................................................................................. 11

Soft Start ...................................................................................... 11

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

Dynamic VID ............................................................................. 12

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

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

Output Enable and UVLO ........................................................ 13

Application Information................................................................ 19

Setting the Clock Frequency..................................................... 19

Soft Start Delay Time................................................................. 19

Current-Limit Latch-Off Delay Times .................................... 19

Inductor Selection ...................................................................... 19

Current Sense Amplifier............................................................ 20

Inductor DCR Temperature Correction ................................. 21

Output Offset .............................................................................. 21

COUT Selection ............................................................................. 22

Power MOSFETs......................................................................... 23

Ramp Resistor Selection............................................................ 24

COMP Pin Ramp ....................................................................... 24

Current-Limit Setpoint.............................................................. 24

Feedback Loop Compensation Design.................................... 25

CIN Selection and Input Current di/dt Reduction.................. 26

Shunt Resistor Design................................................................ 26

Tuning Procedure for ADP3193A............................................ 27

Layout and Component Placement ......................................... 29

Outline Dimensions ....................................................................... 30

Ordering Guide .......................................................................... 30

REVISION HISTORY

5/07—Revision 0: Initial Version