ADP1611

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TABLE OF CONTENTS

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

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

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

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

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

Theory of Operation ...................................................................... 10

Current-Mode PWM Operation .............................................. 10

Frequency Selection ................................................................... 10

Soft Start ...................................................................................... 10

On/Off Control........................................................................... 10

Setting the Output Voltage ........................................................ 10

Choosing the Input and Output Capacitors ........................... 11

Diode Selection........................................................................... 12

Loop Compensation .................................................................. 12

Soft-Start Capacitor ................................................................... 13

Application Circuits ................................................................... 14

Step-Up DC-to-DC Converter with True Shutdown ............ 14

TFT LCD Bias Supply ................................................................ 14

SEPIC Power Supply .................................................................. 15

Layout Procedure ........................................................................... 16

Outline Dimensions ....................................................................... 18

Ordering Guide .......................................................................... 18

REVISION HISTORY

2/05—Revision 0: Initial Version