ADP3193 查看數據表（PDF） - Analog Devices

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ADP3193

8-Bit Programmable 2-Phase to 3-Phase Synchronous Buck Controller

Analog Devices 

ADP3193

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

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

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

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

REVISION HISTORY

8/06—Revision A: Initial Version

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 ............................................................................. 21

Power MOSFETs......................................................................... 22

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

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

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

Feedback Loop Compensation Design.................................... 24

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

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

Tuning the ADP3193 ................................................................. 27

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

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

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

Rev. A | Page 2 of 32

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