ADP3210 Datasheet, PDF (2/38 Pages) ON Semiconductor – 7-Bit Programmable Multiphase Mobile CPU Synchronous

ADP3210
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Test Circuits....................................................................................... 7
Absolute Maximum Ratings............................................................ 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Typical Performance Characteristics ........................................... 11
Theory of Operation ...................................................................... 14
Number of Phases....................................................................... 14
Operation Modes........................................................................ 14
Switch Frequency Setting .......................................................... 16
Output Voltage Differential Sensing ........................................ 16
Output Current Sensing ............................................................ 17
Active Impedance Control Mode............................................. 17
Current Control Mode and Thermal Balance ........................ 17
Voltage Control Mode................................................................ 18
Power-Good Monitoring........................................................... 18
Power-Up Sequence and Soft Start .......................................... 18
Soft Transient .............................................................................. 18
Current-Limit, Short-Circuit, and Latch-Off Protection...... 18
Changing VID on-the-Fly......................................................... 19
REVISION HISTORY
5/08—Revision 0: Initial Preliminary Version
Output Crowbar ......................................................................... 19
Reverse Voltage Protection ....................................................... 19
Output Enable and UVLO ........................................................ 20
Output Current Monitor ........................................................... 20
Thermal Throttling Control ..................................................... 20
Application Information................................................................ 25
Setting the Clock Frequency for PWM Mode........................ 25
Inductor Selection ...................................................................... 25
COUT Selection ............................................................................. 27
Power MOSFETs......................................................................... 28
Ramp Resistor Selection............................................................ 29
Setting the Switching Frequency for RPM Mode Operation of
Phase 1 ......................................................................................... 29
Current-Limit Setpoint.............................................................. 30
Output Current monitor ........................................................... 30
Feedback Loop Compensation Design ................................... 30
CIN Selection and Input Current DI/DT Reduction ................ 31
RC Snubber ................................................................................. 31
Selecting Thermal Monitor Components ............................... 32
Tuning Procedure for ADP3210............................................... 32
Layout and Component Placement ......................................... 34
Outline Dimensions ....................................................................... 36
Ordering Guide .......................................................................... 36
Rev. 0.3 | Page 2 of 38