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ADP2302-EVALZ Arkusz danych(PDF) 2 Page - Analog Devices

Numer części ADP2302-EVALZ
Szczegółowy opis  2 A/3 A, 20 V, 700 kHz, Nonsynchronous Step-Down Regulators
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Strona internetowa  http://www.analog.com
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ADP2302-EVALZ Arkusz danych(HTML) 2 Page - Analog Devices

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ADP2302/ADP2303
Rev. 0 | Page 2 of 28
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
 
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
 
REVISION HISTORY
7/10—Revision 0: Initial Version


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