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ADP3208A डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 7-Bit Programmable Dual-Phase Mobile CPU Synchronous Buck Controller - ON Semiconductor

भाग संख्या ADP3208A
समारोह 7-Bit Programmable Dual-Phase Mobile CPU Synchronous Buck Controller
मैन्युफैक्चरर्स ON Semiconductor 
लोगो ON Semiconductor लोगो 
पूर्व दर्शन
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<?=ADP3208A?> डेटा पत्रक पीडीएफ

ADP3208A pdf
ADP3208A
TABLE OF CONTENTS
Features...............................................................................................1
Applications .......................................................................................1
General Description..........................................................................1
Functional Block Diagram...............................................................1
Revision History................................................................................2
Specifications .....................................................................................3
Timing Diagram................................................................................7
Absolute Maximum Ratings ............................................................8
ESD Caution ..................................................................................8
Pin Configuration and Function Descriptions .............................9
Test Circuits .....................................................................................11
Typical Performance Characteristics............................................12
Theory of Operation.......................................................................15
Number of Phases .......................................................................15
Operation Modes ........................................................................15
Differential Sensing of Output Voltage ....................................18
Output Current Sensing .............................................................18
Active Impedance Control Mode .............................................18
Current Control Mode and Thermal Balance.........................19
Voltage Control Mode ................................................................19
Power Good Monitoring ............................................................19
Power-Up Sequence and Soft Start ...........................................19
Soft Transient...............................................................................20
Current Limit, Short-Circuit, and Latch-Off Protection.......20
Changing VID on the Fly...........................................................21
Output Crowbar ..........................................................................23
REVISION HISTORY
01/08—Rev 2: Conversion to ON Semiconductor
08/07—Rev Sp1: Changed to ADP3208A
10/05—Rev Sp0: Initial Version
Reverse Voltage Protection........................................................23
Output Enable and UVLO.........................................................23
Thermal Throttling Control......................................................23
Power Monitor Function ...........................................................24
Application Information ................................................................27
Setting the Clock Frequency for PWM....................................27
Setting the Switching Frequency for
RPM Operation of Phase 1 ........................................................27
Soft Start and Current Limit Latch-Off Delay Times ............27
PWRGD Delay Timer ................................................................28
Inductor Selection.......................................................................28
COUT Selection..............................................................................30
Power MOSFETs .........................................................................31
Ramp Resistor Selection ............................................................32
COMP Pin Ramp ........................................................................32
Current Limit Setpoint...............................................................32
Power Monitor ............................................................................33
Feedback Loop Compensation Design ....................................33
CIN Selection and Input Current di/dt Reduction ..................34
Soft Transient Setting .................................................................34
Selecting Thermal Monitor Components................................34
Tuning Procedure for ADP3208 ...............................................35
Layout and Component Placement..........................................36
Outline Dimension .........................................................................38
Ordering Guide ...........................................................................38
Rev. 2 | Page 2 of 38 | www.onsemi.com
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