Datasheet ADP2325 (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | Dual 5 A, 20 V Synchronous Step-Down Regulator with Integrated High-Side MOSFET |
| 页数 / 页 | 32 / 2 — ADP2325. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 7/12—Rev. 0 to … |
| 修订版 | A |
| 文件格式/大小 | PDF / 810 Kb |
| 文件语言 | 英语 |
ADP2325. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 7/12—Rev. 0 to Rev. A. 2/12—Revision 0: Initial Version
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ADP2325 Data Sheet TABLE OF CONTENTS
Features .. 1 Overvoltage Protection .. 19 Applications ... 1 Undervoltage Lockout ... 19 Typical Application Circuit ... 1 Thermal Shutdown .. 19 General Description ... 1 Applications Information .. 20 Revision History ... 2 ADIsimPower Design Tool ... 20 Functional Block Diagram .. 3 Input Capacitor Selection .. 20 Specifications ... 4 Output Voltage Setting .. 20 Absolute Maximum Ratings ... 6 Voltage Conversion Limitations ... 20 Thermal Resistance .. 6 Current-Limit Setting .. 20 ESD Caution .. 6 Inductor Selection .. 21 Pin Configuration and Function Descriptions ... 7 Output Capacitor Selection ... 21 Typical Performance Characteristics ... 9 Low-Side Power Device Selection .. 22 Theory of Operation .. 16 Programming the UVLO Input .. 22 Control Scheme .. 16 Compensation Components Design ... 23 PWM Mode ... 16 Design Example .. 24 PFM Mode ... 16 Output Voltage Setting .. 24 Precision Enable/Shutdown .. 16 Current-Limit Setting .. 24 Separate Input Voltages ... 16 Frequency Setting ... 24 Internal Regulator (INTVCC) .. 16 Inductor Selection .. 24 Bootstrap Circuitry .. 17 Output Capacitor Selection ... 24 Low-Side Driver .. 17 Low-Side MOSFET Selection ... 25 Oscillator ... 17 Compensation Components ... 25 Synchronization .. 17 Soft Start Time Programming .. 26 Soft Start .. 17 Input Capacitor Selection .. 26 Peak Current-Limit and Short-Circuit Protection ... 17 External Components Recommendations .. 27 Voltage Tracking ... 18 Typical Application Circuits ... 28 Parallel Operation... 18 Packaging and Ordering Information ... 32 Power Good ... 19 Outline Dimensions ... 32 Ordering Guide .. 32
REVISION HISTORY 7/12—Rev. 0 to Rev. A
Added ADIsimPower Design Tool Section ... 20 Changes to Ordering Guide .. 32
2/12—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 Coincident Tracking Ratiometric 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 the 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 Recommendations Typical Application Circuits Packaging and Ordering Information Outline Dimensions Ordering Guide
ADP2325 Data Sheet TABLE OF CONTENTS
Features .. 1 Overvoltage Protection .. 19 Applications ... 1 Undervoltage Lockout ... 19 Typical Application Circuit ... 1 Thermal Shutdown .. 19 General Description ... 1 Applications Information .. 20 Revision History ... 2 ADIsimPower Design Tool ... 20 Functional Block Diagram .. 3 Input Capacitor Selection .. 20 Specifications ... 4 Output Voltage Setting .. 20 Absolute Maximum Ratings ... 6 Voltage Conversion Limitations ... 20 Thermal Resistance .. 6 Current-Limit Setting .. 20 ESD Caution .. 6 Inductor Selection .. 21 Pin Configuration and Function Descriptions ... 7 Output Capacitor Selection ... 21 Typical Performance Characteristics ... 9 Low-Side Power Device Selection .. 22 Theory of Operation .. 16 Programming the UVLO Input .. 22 Control Scheme .. 16 Compensation Components Design ... 23 PWM Mode ... 16 Design Example .. 24 PFM Mode ... 16 Output Voltage Setting .. 24 Precision Enable/Shutdown .. 16 Current-Limit Setting .. 24 Separate Input Voltages ... 16 Frequency Setting ... 24 Internal Regulator (INTVCC) .. 16 Inductor Selection .. 24 Bootstrap Circuitry .. 17 Output Capacitor Selection ... 24 Low-Side Driver .. 17 Low-Side MOSFET Selection ... 25 Oscillator ... 17 Compensation Components ... 25 Synchronization .. 17 Soft Start Time Programming .. 26 Soft Start .. 17 Input Capacitor Selection .. 26 Peak Current-Limit and Short-Circuit Protection ... 17 External Components Recommendations .. 27 Voltage Tracking ... 18 Typical Application Circuits ... 28 Parallel Operation... 18 Packaging and Ordering Information ... 32 Power Good ... 19 Outline Dimensions ... 32 Ordering Guide .. 32
REVISION HISTORY 7/12—Rev. 0 to Rev. A
Added ADIsimPower Design Tool Section ... 20 Changes to Ordering Guide .. 32
2/12—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 Coincident Tracking Ratiometric 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 the 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 Recommendations Typical Application Circuits Packaging and Ordering Information Outline Dimensions Ordering Guide