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ADP2389 Arkusz danych(PDF) 2 Page - Analog Devices |
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ADP2389 Arkusz danych(HTML) 2 Page - Analog Devices |
2 / 23 page ADP2389/ADP2390 Data Sheet Rev. 0 | Page 2 of 23 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Typical Applications Circuit............................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Detailed Functional Block Diagram .............................................. 3 Specifications..................................................................................... 4 Absolute Maximum Ratings............................................................ 6 Thermal Information ................................................................... 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Typical Performance Characteristics ............................................. 8 Theory of Operation ...................................................................... 12 Control Scheme .......................................................................... 12 PFM Mode (ADP2390 Only).................................................... 12 Precision Enable/Shutdown ...................................................... 12 Internal Regulator (VREG) ....................................................... 12 Bootstrap Circuitry .................................................................... 12 Oscillator ..................................................................................... 12 Soft Start ...................................................................................... 13 Fast Transient Response ............................................................ 13 Power Good................................................................................. 13 Peak Current-Limit and Short-Circuit Protection................. 13 Overvoltage Protection (OVP) ................................................. 13 Undervoltage Lockout (UVLO) ............................................... 13 Thermal Shutdown .................................................................... 13 Applications Information .............................................................. 14 Input Capacitor Selection.......................................................... 14 Output Voltage Setting .............................................................. 14 Inductor Selection ...................................................................... 14 Output Capacitor Selection....................................................... 15 Programming Input Voltage UVLO ........................................ 15 Compensation Design ............................................................... 15 Design Example .............................................................................. 17 Output Voltage Setting .............................................................. 17 Frequency Setting....................................................................... 17 Inductor Selection ...................................................................... 17 Output Capacitor Selection....................................................... 17 Compensation Components..................................................... 18 Soft Start Time Program ........................................................... 18 Input Capacitor Selection.......................................................... 18 Schematic for Design Example................................................. 18 External Components Recommendation.................................... 19 Circuit Board Layout Recommendations ................................... 20 Typical Application Circuits ......................................................... 22 Outline Dimensions ....................................................................... 23 Ordering Guide .......................................................................... 23 REVISION HISTORY 8/15—Revision 0: Initial Version |
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