ADP1612 데이터 시트보기 (PDF) - Analog Devices

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ADP1612

650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters

Analog Devices 

ADP1612/ADP1613

TABLE OF CONTENTS

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

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

Typical Application Circuit ............................................................. 1

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

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

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

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

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

Boundary Condition .................................................................... 4

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

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

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

Theory of Operation ...................................................................... 11

Current-Mode PWM Operation .............................................. 11

Frequency Selection ................................................................... 11

Soft Start ...................................................................................... 11

Thermal Shutdown (TSD)......................................................... 12

UnderVoltage Lockout (UVLO)............................................... 12

REVISION HISTORY

11/12—Rev. C to Rev. D

Changes to Choosing the Input and Output Capacitors Section

and Loop Compensation Section ..................................................14

7/12—Rev. B to Rev. C

Changes to Features Section.............................................................1

Added ADIsimPower Design Tool Section..................................13

Changes to Ordering Guide ...........................................................25

4/11—Rev. A to Rev. B

Changes to Features Section............................................................ 1

Changes to Reference Feedback Voltage Parameter .................... 3

Changes to Ordering Guide .......................................................... 25

Data Sheet

Enable/Shutdown Control ........................................................ 12

Applications Information .............................................................. 13

ADIsimPower Design Tool ....................................................... 13

Setting the Output Voltage........................................................ 13

Inductor Selection ...................................................................... 13

Choosing the Input and Output Capacitors ........................... 14

Diode Selection........................................................................... 14

Loop Compensation .................................................................. 14

Soft Start Capacitor .................................................................... 15

Typical Application Circuits ......................................................... 16

Step-Up Regulator ...................................................................... 16

Step-Up Regulator Circuit Examples....................................... 16

SEPIC Converter ........................................................................ 22

TFT LCD Bias Supply ................................................................ 22

PCB Layout Guidelines.................................................................. 24

Outline Dimensions ....................................................................... 25

Ordering Guide .......................................................................... 25

9/09—Rev. 0 to Rev. A

Changes to Figure 45...................................................................... 17

Changes to Figure 48 and Figure 51 ............................................ 18

Changes to Figure 54 and Figure 57 ............................................ 19

Changes to Figure 60 and Figure 63 ............................................ 20

Changes to Figure 66 and Figure 69 ............................................ 21

Changes to Figure 72...................................................................... 22

Changes to Ordering Guide .......................................................... 25

4/09—Revision 0: Initial Version

Rev. D | Page 2 of 28

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