ADP2380-EVALZ Ver la hoja de datos (PDF) - Analog Devices

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ADP2380-EVALZ

20 V, 4 A Synchronous Step-Down Regulator with Low-Side Driver

Analog Devices 

ADP2380

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Typical Applications Circuit............................................................ 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 5

Thermal Information ................................................................... 5

ESD Caution.................................................................................. 5

Pin Configuration and Function Descriptions............................. 6

Typical Performance Characteristics ............................................. 7

Functional Block Diagram ............................................................ 12

Theory of Operation ...................................................................... 13

Control Scheme .......................................................................... 13

Internal Regulator (VREG) ....................................................... 13

Bootstrap Circuitry .................................................................... 13

Low-Side Driver.......................................................................... 13

Oscillator ..................................................................................... 13

Synchronization .......................................................................... 13

Enable and Soft Start.................................................................. 13

Power Good................................................................................. 14

Peak Current-Limit and Short-Circuit Protection................. 14

Overvoltage Protection (OVP) ................................................. 14

Undervoltage Lockout (UVLO) ............................................... 14

Thermal Shutdown..................................................................... 14

REVISION HISTORY

12/12—Revision 0: Initial Version

Data Sheet

Applications Information .............................................................. 15

Input Capacitor Selection.......................................................... 15

Output Voltage Setting .............................................................. 15

Voltage Conversion Limitations ............................................... 15

Inductor Selection ...................................................................... 15

Output Capacitor Selection....................................................... 17

Low-Side Power Device Selection............................................ 17

Programming Input Voltage UVLO ........................................ 18

Compensation Design ............................................................... 18

ADIsimPower Design Tool ....................................................... 19

Design Example .............................................................................. 20

Output Voltage Setting .............................................................. 20

Frequency Setting....................................................................... 20

Inductor Selection ...................................................................... 20

Output Capacitor Selection....................................................... 20

Low-Side MOSFET Selection ................................................... 21

Compensation Components ..................................................... 21

Soft Start Time Program ........................................................... 21

Input Capacitor Selection.......................................................... 21

Recommended External Components ........................................ 22

Circuit Board Layout Recommendations ................................... 24

Typical Applications Circuits........................................................ 26

Outline Dimensions ....................................................................... 27

Ordering Guide .......................................................................... 27

Rev. 0 | Page 2 of 28

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