Datasheet ADP2370, ADP2371 (Analog Devices) - 2

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ADP2370/ADP2371 Data Sheet TABLE OF CONTENTS
Features .. 1 Undervoltage Lockout ... 22 Applications ... 1 Thermal Protection .. 22 Typical Application Circuit ... 1 Soft Start .. 22 General Description ... 1 Current Limit .. 22 Revision History ... 2 100% Duty Cycle .. 23 Specifications ... 3 Synchronizing ... 23 Recommended Specifications: Capacitors .. 5 Power Good .. 24 Absolute Maximum Ratings ... 6 Applications Information .. 25 Thermal Data .. 6 ADIsimPower Design Tool ... 25 Thermal Resistance .. 6 External Component Selection .. 25 ESD Caution .. 6 Selecting the Inductor .. 25 Pin Configuration and Function Descriptions ... 7 Output Capacitor .. 25 Typical Performance Characteristics ... 8 Input Capacitor ... 25 Buck Output .. 8 Adjustable Output Voltage Programming .. 25 Theory of Operation .. 20 Efficiency ... 26 PWM Operation ... 20 Recommended Buck External Components .. 26 PSM Operation ... 21 Capacitor Selection .. 28 Features Descriptions ... 22 Thermal Considerations .. 29 Precision Enable ... 22 PCB Layout Considerations .. 30 Forced PWM or PWM/PSM Selection.. 22 Packaging and Ordering Information ... 32 Quick Output Discharge (QOD) Function ... 22 Outline Dimensions ... 32 Short-Circuit Protection .. 22 Ordering Guide .. 32
REVISION HISTORY 2/14—Rev. C to Rev. D
Change to Figure 13 ... 9 Updated Outline Dimensions ... 32
11/12—Rev. B to Rev. C
Change to Figure 6 ... 8 Changes to Ordering Guide... 32
8/12—Rev. A to Rev. B
Change to Figure 62 ... 17 Changes to Figure 63, Figure 64, Figure 65, and Figure 66 .. 18
5/12—Rev. 0 to Rev. A
Changed Voltage Range for SW to PGND and Ground Plane from −0.3 V to VIN + 0.3 V to −0.7 V to VIN + 0.3 V ... 6 Changes to Ordering Guide .. 32
4/12—Revision 0: Initial Version
Rev. D | Page 2 of 32 Document Outline Features Applications Typical Application Circuit General Description Table of Contents Revision History Specifications Recommended Specifications: Capacitors Absolute Maximum Ratings Thermal Data Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Buck Output Theory of Operation PWM Operation PSM Operation Features Descriptions Precision Enable Forced PWM or PWM/PSM Selection Quick Output Discharge (QOD) Function Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit 100% Duty Cycle Synchronizing Power Good Applications Information ADIsimPower Design Tool External Component Selection Selecting the Inductor Output Capacitor Input Capacitor Adjustable Output Voltage Programming Efficiency Power Switch Conduction Losses Inductor Losses Switching Losses Transition Losses Recommended Buck External Components Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Thermal Considerations PCB Layout Considerations Packaging and Ordering Information Outline Dimensions Ordering Guide