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ADP3192A Datasheet(PDF) 2 Page - Analog Devices

Part # ADP3192A
Description  8-Bit Programmable 2- to 4-Phase Synchronous Buck Controller
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADP3192A Datasheet(HTML) 2 Page - Analog Devices

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ADP3192A
Rev. 0 | Page 2 of 32
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
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
REVISION HISTORY
5/07—Revision 0: Initial Version


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