ADP3207 ANALOG DEVICES, ADP3207 Datasheet - Page 2

• Manufacturer Part Number: ADP3207
• Description: 7-Bit Programmable Multiphase Mobile CPU Synchronous Buck Controller
• Manufacturer: ANALOG DEVICES

ADP3207
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Test Circuits....................................................................................... 6
Absolute Maximum Ratings............................................................ 7
Pin Configuration and Function Descriptions............................. 8
Typical Performance Characteristics ........................................... 10
Theory of Operation ...................................................................... 11
REVISION HISTORY
1/06—Revision 0: Initial Version
ESD Caution.................................................................................. 7
Number of Phases....................................................................... 11
Operation Modes........................................................................ 11
Switch Frequency Setting .......................................................... 12
Output Voltage Differential Sensing ........................................ 12
Output Current Sensing ............................................................ 12
Active Impedance Control Mode............................................. 13
Current Control Mode and Thermal Balance ........................ 13
Voltage Control Mode................................................................ 13
Power-Good Monitoring........................................................... 13
Power-Up Sequence and Soft Start .......................................... 14
Soft Transient .............................................................................. 14
Current-Limit, Short-Circuit, and Latch-Off Protection...... 15
Changing VID on-the-Fly......................................................... 15
Rev. 0 | Page 2 of 32
Application Information................................................................ 20
Outline Dimensions ....................................................................... 30
Output Crowbar ......................................................................... 16
Reverse Voltage Protection ....................................................... 16
Output Enable and UVLO ........................................................ 16
Thermal Throttling Control ..................................................... 16
Setting the Clock Frequency for PWM Mode........................ 20
Soft-Start and Current-Limit Latch-Off Delay Times ........... 20
PWRGD Delay Timer................................................................ 20
Inductor Selection ...................................................................... 20
C
Power MOSFETs......................................................................... 23
Ramp Resistor Selection............................................................ 24
Setting the Switching Frequency for RPM Mode Operation of
Phase 1 ......................................................................................... 25
Current-Limit Setpoint.............................................................. 25
Feedback Loop Compensation Design.................................... 25
C Selection and Input Current D /D Reduction
Soft Transient Setting................................................................. 26
Selecting Thermal Monitor Components ............................... 26
Tuning Procedure for ADP3207............................................... 27
Layout and Component Placement ......................................... 28
Ordering Guide .......................................................................... 30
OUT
IN
Selection
............................................................................. 22
I
T
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