Datasheet ADP2323 (Analog Devices) - 2

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ADP2323 Data Sheet TABLE OF CONTENTS
Features .. 1 Overvoltage Protection .. 17 Applications ... 1 Undervoltage Lockout ... 18 Typical Application Circuit ... 1 Thermal Shutdown .. 18 General Description ... 1 Applications Information .. 19 Revision History ... 2 ADIsimPower Design Tool ... 19 Functional Block Diagram .. 3 Input Capacitor Selection .. 19 Specifications ... 4 Output Voltage Setting .. 19 Absolute Maximum Ratings .. 6 Voltage Conversion Limitations ... 19 Thermal Resistance .. 6 Current-Limit Setting .. 19 ESD Caution .. 6 Inductor Selection .. 20 Pin Configuration and Function Descriptions ... 7 Output Capacitor Selection... 20 Typical Performance Characteristics ... 9 Low-Side Power Device Selection .. 21 Theory of Operation .. 15 Programming UVLO Input .. 21 Control Scheme .. 15 Compensation Components Design ... 21 PWM Mode ... 15 Design Example .. 23 PFM Mode ... 15 Output Voltage Setting .. 23 Precision Enable/Shutdown .. 15 Current-Limit Setting .. 23 Separate Input Voltages ... 15 Frequency Setting ... 23 Internal Regulator (INTVCC) .. 15 Inductor Selection .. 23 Bootstrap Circuitry .. 16 Output Capacitor Selection... 23 Low-Side Driver .. 16 Low-Side MOSFET Selection ... 24 Oscillator ... 16 Compensation Components ... 24 Synchronization .. 16 Soft Start Time Programming .. 24 Soft Start .. 16 Input Capacitor Selection .. 24 Peak Current-Limit and Short-Circuit Protection ... 16 External Components Recommendation .. 25 Voltage Tracking ... 17 Typical Application Circuits ... 26 Parallel Operation... 17 Outline Dimensions ... 31 Power Good ... 17 Ordering Guide .. 31
REVISION HISTORY 6/12—Rev. 0 to Rev. A
Change to Features Section ... 1 Added ADIsimPower Design Tool Section ... 19
7/11—Revision 0: Initial Version
Rev. A | Page 2 of 32 Document Outline Features Applications Typical Application Circuit General Description Revision History Functional Block Diagram Specifications Absolute Maximum Ratings Thermal Resistance Boundary Condition ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode PFM Mode Precision Enable/Shutdown Separate Input Voltages Internal Regulator (INTVCC) Bootstrap Circuitry Low-Side Driver Oscillator Synchronization Soft Start Peak Current-Limit and Short-Circuit Protection Voltage Tracking Parallel Operation Power Good Overvoltage Protection Undervoltage Lockout Thermal Shutdown Applications Information ADIsimPower Design Tool Input Capacitor Selection Output Voltage Setting Voltage Conversion Limitations Current-Limit Setting Inductor Selection Output Capacitor Selection Low-Side Power Device Selection Programming UVLO Input Compensation Components Design Design Example Output Voltage Setting Current-Limit Setting Frequency Setting Inductor Selection Output Capacitor Selection Low-Side MOSFET Selection Compensation Components Soft Start Time Programming Input Capacitor Selection External Components Recommendation Typical Application Circuits Outline Dimensions Ordering Guide