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ADP3025 Datasheet(PDF) 2 Page - Analog Devices |
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ADP3025 Datasheet(HTML) 2 Page - Analog Devices |
2 / 24 page ADP3025 Rev. A | Page 2 of 24 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 9 Theory of Operation ...................................................................... 11 Internal 5 V Supply (INTVCC) ................................................ 11 Reference (REF).......................................................................... 11 Boosted High-Side Gate Drive Supply (BST) ......................... 11 Synchronous Rectifier (DRVL) ................................................ 11 Oscillator Frequency and Synchronization (SYNC).............. 11 Shutdown SD............................................................................... 11 Soft Start and Power-Up Sequencing (SS) .............................. 11 Current Limiting (CLSET) ........................................................ 12 Output Undervoltage Protection.............................................. 12 Output Overvoltage and Reverse Voltage Protection............ 12 Power Good Output (PWRGD) ............................................... 12 Linear Regulator Controller...................................................... 12 Output Voltage Adjustment ...................................................... 13 Application Information ........................................................... 13 Input Voltage Range ................................................................... 13 Maximum Output Current and MOSFET Selection ............. 14 Nominal Inductor Value............................................................ 15 Inductor Selection ...................................................................... 15 CIN and COUT Selection ............................................................... 16 Power MOSFET Selection......................................................... 16 Soft Start ...................................................................................... 17 Fixed or Adjustable Output Voltage......................................... 17 Efficiency Enhancement............................................................ 17 Transient Response Considerations......................................... 18 Feedback Loop Compensation................................................. 18 Compensation Loop Design and Test Method ...................... 19 Recommended Applications..................................................... 19 Layout Considerations............................................................... 19 Outline Dimensions ....................................................................... 21 Ordering Guide .......................................................................... 21 REVISION HISTORY Revision A 4/04—Data Sheet changed from Rev. 0 to Rev. A Change Page Changes to Features...................................................................... 1 Changes to Specifications ............................................................ 3 Changes to Figures 4 and 5.......................................................... 9 Changes to Theory of Operation section ................................ 11 Changes to Output Voltage Adjustment section .................... 13 Changes to Table 5...................................................................... 13 Changes to Table 6...................................................................... 15 Changes to Table 8...................................................................... 16 Changes to Table 9...................................................................... 17 1/04—Revision 0: Initial Version |
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