Datasheet ADP1850 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller |
| Pages / Page | 32 / 2 — ADP1850. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 5/2017—Rev. B to … |
| Revision | C |
| File Format / Size | PDF / 1.1 Mb |
| Document Language | English |
ADP1850. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 5/2017—Rev. B to Rev. C. 4/2012—Rev. 0 to Rev. A
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ADP1850 Data Sheet TABLE OF CONTENTS
Features .. 1 Accurate Current-Limit Sensing .. 17 Applications ... 1 Setting the Slope Compensation .. 17 General Description ... 1 Setting the Current Sense Gain .. 17 Typical Operation Circuit .. 1 Input Capacitor Selection .. 18 Revision History ... 2 Input Filter ... 18 Specifications ... 3 Boost Capacitor Selection ... 18 Absolute Maximum Ratings .. 5 Inductor Selection .. 18 ESD Caution .. 5 Output Capacitor Selection... 19 Simplified Block Diagram ... 6 MOSFET Selection ... 19 Pin Configuration and Function Descriptions ... 7 Loop Compensation (Single Phase Operation) ... 21 Typical Performance Characteristics ... 9 Configuration and Loop Compensation (Dual-Phase Theory of Operation .. 12 Operation) ... 22 Control Architecture .. 12 Switching Noise and Overshoot Reduction .. 22 Oscillator Frequency .. 12 Voltage Tracking ... 23 Modes of Operation ... 13 Indepdendent Power Stage Input Voltage ... 24 Synchronization .. 13 PCB Layout Guidelines .. 25 Synchronous Rectifier and Dead Time ... 14 MOSFETs, Input Bulk Capacitor, and Bypass Capacitor .. 25 Input Undervoltage Lockout ... 14 High Current and Current Sense Paths ... 25 Internal Linear Regulator .. 14 Signal Paths ... 25 Overvoltage Protection .. 14 PGND Plane .. 25 Power Good ... 14 Feedback and Current-Limit Sense Paths ... 25 Short-Circuit and Current-Limit Protection .. 15 Switch Node .. 26 Shutdown Control .. 15 Gate Driver Paths ... 26 Thermal Overload Protection ... 15 Output Capacitors .. 26 Applications Information .. 16 Typical Operating Circuits .. 27 Setting the Output Voltage .. 16 Outline Dimensions ... 31 Soft Start .. 16 Ordering Guide .. 31 Setting the Current Limit .. 16
REVISION HISTORY 5/2017—Rev. B to Rev. C 4/2012—Rev. 0 to Rev. A
Changes to Oscillator Frequency Section.. 12 Changes to Setting the Current Sense Gain Section .. 17
Updated Outline Dimensions ... 31
2/2017—Rev. A to Rev. B
Changed CP-32-11 to CP-32-12 .. Throughout
11/2010—Revision 0: Initial Version
Changes to Oscillator Frequency Section.. 12 Updated Outline Dimensions ... 31 Changes to Ordering Guide .. 31 Rev. C | Page 2 of 32 Document Outline Features Applications General Description Typical Operation Circuit Revision History Specifications Absolute Maximum Ratings ESD Caution Simplified Block Diagram Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Architecture Oscillator Frequency Modes of Operation Synchronization Synchronous Rectifier and Dead Time Input Undervoltage Lockout Internal Linear Regulator Overvoltage Protection Power Good Short-Circuit and Current-Limit Protection Shutdown Control Thermal Overload Protection Applications Information Setting the Output Voltage Soft Start Setting the Current Limit Accurate Current-Limit Sensing Setting the Slope Compensation Setting the Current Sense Gain Input Capacitor Selection Input Filter Boost Capacitor Selection Inductor Selection Output Capacitor Selection MOSFET Selection Loop Compensation (Single Phase Operation) Configuration and Loop Compensation (Dual-Phase Operation) Switching Noise and Overshoot Reduction Voltage Tracking Coincident Tracking Ratiometric Tracking Indepdendent Power Stage Input Voltage PCB Layout Guidelines MOSFETs, Input Bulk Capacitor, and Bypass Capacitor High Current and Current Sense Paths Signal Paths PGND Plane Feedback and Current-Limit Sense Paths Switch Node Gate Driver Paths Output Capacitors Typical Operating Circuits Outline Dimensions Ordering Guide
ADP1850 Data Sheet TABLE OF CONTENTS
Features .. 1 Accurate Current-Limit Sensing .. 17 Applications ... 1 Setting the Slope Compensation .. 17 General Description ... 1 Setting the Current Sense Gain .. 17 Typical Operation Circuit .. 1 Input Capacitor Selection .. 18 Revision History ... 2 Input Filter ... 18 Specifications ... 3 Boost Capacitor Selection ... 18 Absolute Maximum Ratings .. 5 Inductor Selection .. 18 ESD Caution .. 5 Output Capacitor Selection... 19 Simplified Block Diagram ... 6 MOSFET Selection ... 19 Pin Configuration and Function Descriptions ... 7 Loop Compensation (Single Phase Operation) ... 21 Typical Performance Characteristics ... 9 Configuration and Loop Compensation (Dual-Phase Theory of Operation .. 12 Operation) ... 22 Control Architecture .. 12 Switching Noise and Overshoot Reduction .. 22 Oscillator Frequency .. 12 Voltage Tracking ... 23 Modes of Operation ... 13 Indepdendent Power Stage Input Voltage ... 24 Synchronization .. 13 PCB Layout Guidelines .. 25 Synchronous Rectifier and Dead Time ... 14 MOSFETs, Input Bulk Capacitor, and Bypass Capacitor .. 25 Input Undervoltage Lockout ... 14 High Current and Current Sense Paths ... 25 Internal Linear Regulator .. 14 Signal Paths ... 25 Overvoltage Protection .. 14 PGND Plane .. 25 Power Good ... 14 Feedback and Current-Limit Sense Paths ... 25 Short-Circuit and Current-Limit Protection .. 15 Switch Node .. 26 Shutdown Control .. 15 Gate Driver Paths ... 26 Thermal Overload Protection ... 15 Output Capacitors .. 26 Applications Information .. 16 Typical Operating Circuits .. 27 Setting the Output Voltage .. 16 Outline Dimensions ... 31 Soft Start .. 16 Ordering Guide .. 31 Setting the Current Limit .. 16
REVISION HISTORY 5/2017—Rev. B to Rev. C 4/2012—Rev. 0 to Rev. A
Changes to Oscillator Frequency Section.. 12 Changes to Setting the Current Sense Gain Section .. 17
Updated Outline Dimensions ... 31
2/2017—Rev. A to Rev. B
Changed CP-32-11 to CP-32-12 .. Throughout
11/2010—Revision 0: Initial Version
Changes to Oscillator Frequency Section.. 12 Updated Outline Dimensions ... 31 Changes to Ordering Guide .. 31 Rev. C | Page 2 of 32 Document Outline Features Applications General Description Typical Operation Circuit Revision History Specifications Absolute Maximum Ratings ESD Caution Simplified Block Diagram Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Architecture Oscillator Frequency Modes of Operation Synchronization Synchronous Rectifier and Dead Time Input Undervoltage Lockout Internal Linear Regulator Overvoltage Protection Power Good Short-Circuit and Current-Limit Protection Shutdown Control Thermal Overload Protection Applications Information Setting the Output Voltage Soft Start Setting the Current Limit Accurate Current-Limit Sensing Setting the Slope Compensation Setting the Current Sense Gain Input Capacitor Selection Input Filter Boost Capacitor Selection Inductor Selection Output Capacitor Selection MOSFET Selection Loop Compensation (Single Phase Operation) Configuration and Loop Compensation (Dual-Phase Operation) Switching Noise and Overshoot Reduction Voltage Tracking Coincident Tracking Ratiometric Tracking Indepdendent Power Stage Input Voltage PCB Layout Guidelines MOSFETs, Input Bulk Capacitor, and Bypass Capacitor High Current and Current Sense Paths Signal Paths PGND Plane Feedback and Current-Limit Sense Paths Switch Node Gate Driver Paths Output Capacitors Typical Operating Circuits Outline Dimensions Ordering Guide
