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ADP3190 Datasheet(PDF) 2 Page - Analog Devices

Part No. ADP3190
Description  6-Bit, Programmable 2-/3-/4-Phase, Synchronous Buck Controller
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADP3190 Datasheet(HTML) 2 Page - Analog Devices

 
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ADP3190
Rev. 0 | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Typical Performance Characteristics and Test Circuits............... 7
Theory of Operation ........................................................................ 8
Startup Sequence .......................................................................... 8
Master Clock Frequency.............................................................. 8
Output Voltage Differential Sensing .......................................... 8
Output Current Sensing .............................................................. 8
Active Impedance Control Mode............................................... 9
Current-Control Mode and Thermal Balance.......................... 9
Voltage Control Mode.................................................................. 9
Soft Start ........................................................................................ 9
Current-Limit, Short-Circuit, and Latch-Off Protection...... 10
Dynamic VID.............................................................................. 10
Power Good Monitoring ........................................................... 12
Output Crowbar ......................................................................... 12
Output Enable and UVLO ........................................................ 12
Application Information................................................................ 14
Setting the Clock Frequency..................................................... 14
Soft Start and Current-Limit Latch-Off Delay Times ........... 14
Inductor Selection ...................................................................... 14
Designing an Inductor............................................................... 15
Output Droop Resistance.......................................................... 15
Inductor DCR Temperature Correction ................................. 16
Output Offset .............................................................................. 16
COUT Selection ............................................................................. 17
Power MOSFETs......................................................................... 18
Ramp Resistor Selection............................................................ 19
COMP Pin Ramp ....................................................................... 19
Current-Limit Setpoint.............................................................. 19
Feedback Loop Compensation Design.................................... 19
CIN Selection and Input Current di/dt Reduction.................. 21
Tuning the ADP3190/ADP3190A............................................ 22
Replacing the ADP3188 with the ADP3190........................... 24
Choosing Between the ADP3190 and the ADP3190A ........ 24
Layout and Component Placement.............................................. 25
General Recommendations....................................................... 25
Power Circuitry Recommendations ........................................ 25
Signal Circuitry Recommendations......................................... 25
Outline Dimensions ....................................................................... 26
Ordering Guide .......................................................................... 26
REVISION HISTORY
1/06—Revision 0: Initial Version


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