link to page 3 link to page 4 link to page 4 link to page 5 link to page 6 link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 link to page 11 link to page 12 link to page 12 link to page 13 link to page 14 link to page 14 link to page 14 link to page 15 link to page 16 link to page 18 link to page 18 ADP1611TABLE OF CONTENTS Specifications... 3 Choosing the Input and Output Capacitors ... 11 Absolute Maximum Ratings.. 4 Diode Selection... 12 ESD Caution.. 4 Loop Compensation .. 12 Pin Configuration and Function Descriptions... 5 Soft-Start Capacitor ... 13 Typical Performance Characteristics ... 6 Application Circuits ... 14 Theory of Operation .. 10 Step-Up DC-to-DC Converter with True Shutdown .. 14 Current-Mode PWM Operation .. 10 TFT LCD Bias Supply .. 14 Frequency Selection ... 10 SEPIC Power Supply .. 15 Soft Start .. 10 Layout Procedure ... 16 On/Off Control... 10 Outline Dimensions ... 18 Setting the Output Voltage .. 10 Ordering Guide .. 18 REVISION HISTORY2/05—Revision 0: Initial Version Rev. 0 | Page 2 of 20 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CURRENT-MODE PWM OPERATION FREQUENCY SELECTION SOFT START ON/OFF CONTROL SETTING THE OUTPUT VOLTAGE INDUCTOR SELECTION CHOOSING THE INPUT AND OUTPUT CAPACITORS DIODE SELECTION LOOP COMPENSATION SOFT-START CAPACITOR APPLICATION CIRCUITS STEP-UP DC-TO-DC CONVERTER WITH TRUE SHUTDOWN TFT LCD BIAS SUPPLY SEPIC POWER SUPPLY LAYOUT PROCEDURE OUTLINE DIMENSIONS ORDERING GUIDE
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