Datasheet ADP2138, ADP2139 (Analog Devices) - 2

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ADP2138/ADP2139 Data Sheet TABLE OF CONTENTS
Features .. 1 Short-Circuit Protection.. 12 Applications ... 1 Undervoltage Lockout ... 12 General Description ... 1 Thermal Protection .. 12 Typical Applications Circuit .. 1 Soft Start .. 12 Revision History ... 2 Current Limit .. 12 Specifications ... 3 100% Duty Operation .. 12 Input and Output Capacitor, Recommended Specifications .. 3 Discharge Switch .. 12 Absolute Maximum Ratings .. 4 Applications Information .. 13 Thermal Resistance .. 4 ADIsimPower Design Tool ... 13 ESD Caution .. 4 External Component Selection .. 13 Pin Configuration and Function Descriptions ... 5 Thermal Considerations .. 14 Typical Performance Characteristics ... 6 PCB Layout Guidelines.. 14 Theory of Operation .. 11 Evaluation Board .. 15 Control Scheme .. 11 Evaluation Board Layout ... 15 PWM Mode ... 11 Outline Dimensions ... 16 Power Save Mode .. 11 Ordering Guide .. 17 Enable/Shutdown ... 11
REVISION HISTORY 1/13—Rev. B to Rev. C
Change to Figure 18, Caption .. 8 Change to Figure 28, Caption ... 10
6/12—Rev. A to Rev. B
Change to Features Section ... 1 Added ADIsimPower Design Tool Section ... 13 Changes to Ordering Guide .. 17
4/11—Rev. 0 to Rev. A
Change to Features Section ... 1 Added Figure 32, Renumbered Figures Sequential y .. 10 Changes to Ordering Guide .. 16
1/11—Revision 0: Initial Version
Rev. C | Page 2 of 20 Document Outline Features Applications General Description Typical Applications Circuit Revision History Table of Contents Specifications Input and Output Capacitor, Recommended Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode Power Save Mode Power Save Mode Current Threshold Enable/Shutdown Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit 100% Duty Operation Discharge Switch Applications Information ADIsimPower Design Tool External Component Selection Inductor Thermal Considerations PCB Layout Guidelines Evaluation Board Evaluation Board Layout Outline Dimensions Ordering Guide