ADP3209 ON Semiconductor, ADP3209 Datasheet - Page 2

• Manufacturer Part Number: ADP3209
• Description: 5-bit, Programmable, Single-phase, Synchronous Buck Controller
• Manufacturer: ON Semiconductor

ADP3209
TABLE OF CONTENTS
Features...............................................................................................1
Applications .......................................................................................1
General Description..........................................................................1
Functional Block Diagram...............................................................1
Revision History................................................................................2
Specifications .....................................................................................3
Timing Diagram................................................................................6
Absolute Maximum Ratings ............................................................7
Pin Configuration and Function Descriptions .............................8
Typical Performance Characteristics............................................10
Theory of Operation.......................................................................13
REVISION HISTORY
01/08 - Rev 2: Conversion to ON Semiconductor
9/07—Rev. Sp0 to Rev. SpA
Changes to Absolute Maximum Ratings........................................7
Change to Table 3 ..............................................................................8
Change to the Setting the Clock Frequency for PWM Section.......22
Changes to Ordering Guide.....................................................................32
10/06—Revision Sp0: Initial Version
ESD Caution ..................................................................................7
Operation Modes ........................................................................13
Differential Sensing of Output Voltage ....................................15
Output Current Sensing .............................................................15
Active Impedance Control Mode .............................................15
Voltage Control Mode ................................................................16
Power-Good Monitoring ...........................................................16
Power-Up Sequence and Soft Start ...........................................16
VID Change and Soft Transient................................................16
Current Limit, Short-Circuit, and Latch-Off Protection.......17
Output Crowbar ..........................................................................18
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Application Information ................................................................22
Outline Dimension .........................................................................32
Reverse Voltage Protection........................................................18
Output Enable and UVLO.........................................................19
Power Monitor Function ...........................................................19
Setting the Clock Frequency for PWM....................................22
Setting the Switching Frequency for RPM Operation ...........22
Soft Start and Current Limit Latch-Off Delay Times ............22
Inductor Selection.......................................................................23
C
Power MOSFETs .........................................................................26
Ramp Resistor Selection ............................................................27
COMP Pin Ramp ........................................................................27
Current Limit Setpoint...............................................................27
Power Monitor ............................................................................27
Feedback Loop Compensation Design ....................................27
C
Soft Transient Setting .................................................................29
Tuning Procedure for ADP3209 ...............................................29
Layout and Component Placement..........................................30
Ordering Guide ...........................................................................32
OUT
IN
Selection and Input Current di/dt Reduction ..................29
Selection..............................................................................25