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FDS6898A Arkusz danych(PDF) 2 Page - Analog Devices |
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FDS6898A Arkusz danych(HTML) 2 Page - Analog Devices |
2 / 32 page ADP2323 Data Sheet Rev. A | Page 2 of 32 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Typical Application Circuit ............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Functional Block Diagram .............................................................. 3 Specifications..................................................................................... 4 Absolute Maximum Ratings............................................................ 6 Thermal Resistance ...................................................................... 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Typical Performance Characteristics ............................................. 9 Theory of Operation ...................................................................... 15 Control Scheme .......................................................................... 15 PWM Mode................................................................................. 15 PFM Mode................................................................................... 15 Precision Enable/Shutdown ...................................................... 15 Separate Input Voltages ............................................................. 15 Internal Regulator (INTVCC).................................................. 15 Bootstrap Circuitry .................................................................... 16 Low-Side Driver.......................................................................... 16 Oscillator ..................................................................................... 16 Synchronization.......................................................................... 16 Soft Start ...................................................................................... 16 Peak Current-Limit and Short-Circuit Protection................. 16 Voltage Tracking......................................................................... 17 Parallel Operation....................................................................... 17 Power Good................................................................................. 17 Overvoltage Protection.............................................................. 17 Undervoltage Lockout ............................................................... 18 Thermal Shutdown .................................................................... 18 Applications Information .............................................................. 19 ADIsimPower Design Tool ....................................................... 19 Input Capacitor Selection.......................................................... 19 Output Voltage Setting .............................................................. 19 Voltage Conversion Limitations............................................... 19 Current-Limit Setting ................................................................ 19 Inductor Selection ...................................................................... 20 Output Capacitor Selection....................................................... 20 Low-Side Power Device Selection............................................ 21 Programming UVLO Input ...................................................... 21 Compensation Components Design ....................................... 21 Design Example .............................................................................. 23 Output Voltage Setting .............................................................. 23 Current-Limit Setting ................................................................ 23 Frequency Setting....................................................................... 23 Inductor Selection ...................................................................... 23 Output Capacitor Selection....................................................... 23 Low-Side MOSFET Selection ................................................... 24 Compensation Components..................................................... 24 Soft Start Time Programming .................................................. 24 Input Capacitor Selection.......................................................... 24 External Components Recommendation.................................... 25 Typical Application Circuits ......................................................... 26 Outline Dimensions....................................................................... 31 Ordering Guide .......................................................................... 31 REVISION HISTORY 6/12—Rev. 0 to Rev. A Change to Features Section ............................................................. 1 Added ADIsimPower Design Tool Section................................. 19 7/11—Revision 0: Initial Version |
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