Datasheet ADP5135 (Analog Devices) - 2

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ADP5135 Data Sheet TABLE OF CONTENTS
Features .. 1  Theory of Operation .. 13  Applications ... 1  Power Management Unit ... 13  Typical Application Circuit ... 1  Buck Regulators: BUCK1, BUCK2, AND BUCK3 .. 15  General Description ... 1  Applications Information .. 17  Revision History ... 2  Buck External Component Selection ... 17  Specifications ... 3  Typical Application Schematics .. 19  BUCK1, BUCK2, and BUCK3 .. 4  Power Dissipation and Thermal Considerations ... 21  Input and Output Capacitors, Recommended ... 4  Buck Regulator Power Dissipation .. 21  Absolute Maximum Ratings .. 5  Junction Temperature .. 22  Thermal Resistance .. 5  PCB Layout Guidelines .. 23  ESD Caution .. 5  Outline Dimensions ... 24  Pin Configuration and Function Descriptions ... 6  Ordering Guide .. 24  Typical Performance Characteristics ... 7 
REVISION HISTORY 11/14—Revision 0: Initial Version
Rev. 0 | Page 2 of 24 Document Outline Features Applications Typical Application Circuit General Description Revision History Specifications BUCK1, BUCK2, and BUCK3 Input and Output Capacitors, Recommended Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Power Management Unit Power-Good Output Thermal Protection Undervoltage Lockout Precision Enable and Shutdown Control Buck Regulators: BUCK1, BUCK2, AND BUCK3 Control Scheme PWM Mode Power Save Mode (PSM) PSM Current Threshold Oscillator/Phasing of Inductor Switching Short-Circuit Protection Buck Regulator Soft Start Current Limit 100% Duty Operation Active Pull-Down Resistors Applications Information Buck External Component Selection Feedback Resistors Inductor Output Capacitor Input Capacitor Typical Application Schematics Power Dissipation and Thermal Considerations Buck Regulator Power Dissipation Junction Temperature PCB Layout Guidelines Outline Dimensions Ordering Guide