ADP3192A 查看數據表（PDF） - Analog Devices

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ADP3192A

8-Bit Programmable 2- to 4-Phase Synchronous Buck Controller

Analog Devices 

ADP3192A

TABLE OF CONTENTS

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

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

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

General Description ......................................................................... 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 ............................................. 9

Theory of Operation ...................................................................... 10

Start-Up Sequence...................................................................... 10

Phase Detection Sequence......................................................... 10

Master Clock Frequency............................................................ 11

Output Voltage Differential Sensing ........................................ 11

Output Current Sensing ............................................................ 11

Active Impedance Control Mode............................................. 11

Current Control Mode and Thermal Balance ........................ 11

Voltage Control Mode................................................................ 12

Current Reference ...................................................................... 12

Fast Enhanced PWM Mode ...................................................... 12

Delay Timer................................................................................. 12

Soft Start ...................................................................................... 12

Current-Limit, Short-Circuit, and Latch-Off Protection...... 13

Dynamic VID.............................................................................. 13

REVISION HISTORY

5/07—Revision 0: Initial Version

Power-Good Monitoring........................................................... 14

Output Crowbar ......................................................................... 14

Output Enable and UVLO ........................................................ 14

Thermal Monitoring .................................................................. 14

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 .............................................................................. 22

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

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

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

COMP Pin Ramp ....................................................................... 25

Current-Limit Setpoint.............................................................. 25

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

CIN Selection and Input Current di/dt Reduction.................. 27

Thermal Monitor Design .......................................................... 27

Shunt Resistor Design................................................................ 28

Tuning the ADP3192A .............................................................. 28

Layout and Component Placement ......................................... 30

Outline Dimensions ....................................................................... 31

Ordering Guide .......................................................................... 31

Rev. 0 | Page 2 of 32

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