ADP2302ARDZ-R7 Ver la hoja de datos (PDF) - Analog Devices

Número de pieza

componentes Descripción

Fabricante

ADP2302ARDZ-R7

2 A/3 A, 20 V, 700 kHz, Nonsynchronous Step-Down Regulators

Analog Devices 

ADP2302/ADP2303

TABLE OF CONTENTS

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

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

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

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

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

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

Absolute Maximum Ratings............................................................ 4

Thermal Resistance ...................................................................... 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Typical Performance Characteristics ............................................. 6

Functional Block Diagram ............................................................ 13

Theory of Operation ...................................................................... 14

Basic Operation .......................................................................... 14

PWM Mode................................................................................. 14

Power Saving Mode.................................................................... 14

Bootstrap Circuitry .................................................................... 14

Precision Enable ......................................................................... 14

Integrated Soft Start ................................................................... 14

Current Limit .............................................................................. 14

Short-Circuit Protection............................................................ 14

Undervoltage Lockout (UVLO) ............................................... 15

Thermal Shutdown (TSD)......................................................... 15

REVISION HISTORY

7/10—Revision 0: Initial Version

Overvoltage Protection (OVP)................................................. 15

Power Good ................................................................................ 15

Control Loop............................................................................... 15

Applications Information .............................................................. 16

Programming Output Voltage .................................................. 16

Voltage Conversion Limitations............................................... 16

Low Input Voltage Considerations .......................................... 17

Programming the Precision Enable ......................................... 17

Inductor ....................................................................................... 17

Catch Diode ................................................................................ 18

Input Capacitor........................................................................... 19

Output Capacitor........................................................................ 19

Thermal Consideration ............................................................. 19

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

Catch Diode Selection ............................................................... 20

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

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

Resistive Voltage Divider Selection.......................................... 20

Circuit Board Layout Recommendations ................................... 22

Typical Application Circuits ......................................................... 23

Outline Dimensions ....................................................................... 26

Ordering Guide .......................................................................... 26

Rev. 0 | Page 2 of 28

Share Link: