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ADP3189JCPZ-RLZ Datasheet(PDF) 2 Page - Analog Devices |
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ADP3189JCPZ-RLZ Datasheet(HTML) 2 Page - Analog Devices |
2 / 36 page ADP3189 Rev. 0 | Page 2 of 36 TABLE OF CONTENTS Functional Block Diagram .............................................................. 3 Specifications..................................................................................... 4 Test Circuits....................................................................................... 7 Absolute Maximum Ratings............................................................ 8 ESD Caution.................................................................................. 8 Pin Configuration and Function DescriptionS ............................ 9 Typical Performance Characteristics ........................................... 11 Theory of Operation ...................................................................... 12 Start-Up Sequence...................................................................... 12 Phase Detection Sequence......................................................... 12 Master Clock Frequency............................................................ 13 Output Voltage Differential Sensing ........................................ 13 Output Current Sensing ............................................................ 13 Active Impedance Control Mode............................................. 13 Current Control Mode and Thermal Balance ........................ 13 Voltage Control Mode................................................................ 14 Delay Timer................................................................................. 14 Soft Start ...................................................................................... 14 Current Limit, Short Circuit, and Latch-Off Protection....... 15 Dynamic VID.............................................................................. 15 Power Good Monitoring ........................................................... 15 Output Crowbar ......................................................................... 16 Output Enable and UVLO ........................................................ 16 Thermal Monitoring .................................................................. 16 Application Information................................................................ 22 Setting the Clock Frequency ..................................................... 22 Soft Start Delay Time ................................................................. 22 Current Limit Latch-Off Delay Times..................................... 22 Inductor Selection ...................................................................... 23 Designing an Inductor............................................................... 23 Selecting a Standard Inductor .............................................. 23 Current Sense Amplifier............................................................ 24 Inductor DCR Temperature Correction ................................. 24 Load Line Setting........................................................................ 25 Output Offset .............................................................................. 26 COUT Selection ............................................................................. 26 Power MOSFETs......................................................................... 27 Ramp Resistor Selection............................................................ 28 COMP Pin Ramp ....................................................................... 28 Current Limit SetPoint .............................................................. 29 Feedback Loop Compensation Design.................................... 29 CIN Selection and Input Current di/dt Reduction.................. 31 Thermal Monitor Design .......................................................... 31 Tuning the ADP3189 ................................................................. 32 DC Loadline Setting .............................................................. 32 AC Loadline Setting............................................................... 33 Initial Transient Setting ......................................................... 33 Layout and Component Placement ......................................... 34 General Recommendations .................................................. 34 Power Circuitry Recommendations .................................... 34 Signal Circuitry Recommendations .................................... 34 Outline Dimensions ....................................................................... 35 Ordering Guide .......................................................................... 35 REVISION HISTORY 7/05—Revision 0: Initial Version |
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