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ADP3189JCPZ-RLZ Datasheet(PDF) 2 Page - Analog Devices

No. de pieza ADP3189JCPZ-RLZ
Descripción Electrónicos  8-Bit Programmable 2- to 5-Phase Synchronous Buck Controller
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
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ADP3189JCPZ-RLZ Datasheet(HTML) 2 Page - Analog Devices

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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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