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ADP3192A Datasheet(PDF) 2 Page - Analog Devices |
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ADP3192A Datasheet(HTML) 2 Page - Analog Devices |
2 / 32 page 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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