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FDS8880 Folha de dados(PDF) 2 Page - Analog Devices

Nome de Peças FDS8880
Descrição Electrónicos  Dual 3 A, 20 V Synchronous Step-Down Regulator with Integrated High-Side MOSFET
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
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FDS8880 Folha de dados(HTML) 2 Page - Analog Devices

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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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