Datasheet ADP1876 (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | 600 kHz Dual Output Synchronous Buck PWM Controller Plus Linear Regulator |
| 页数 / 页 | 24 / 2 — ADP1876. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 3/2017—Rev. A to … |
| 修订版 | B |
| 文件格式/大小 | PDF / 700 Kb |
| 文件语言 | 英语 |
ADP1876. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 3/2017—Rev. A to Rev. B. 11/2011—Rev. 0 to Rev. A
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ADP1876 Data Sheet TABLE OF CONTENTS
Features .. 1 Independent Low Dropout Linear Regulator ... 17 Applications ... 1 Setting the Output Voltage of the Controller ... 17 Typical Operation Circuit .. 1 Soft Start .. 17 General Description ... 1 Setting the Current Limit .. 17 Revision History ... 2 Accurate Current-Limit Sensing .. 17 Functional Block Diagram .. 3 Setting the Slope Compensation .. 18 Specifications ... 4 Setting the Current Sense Gain .. 18 Absolute Maximum Ratings ... 7 Input Capacitor Selection .. 18 ESD Caution .. 7 Input Filter .. 19 Pin Configuration and Function Descriptions ... 8 Boost Capacitor Selection ... 19 Typical Performance Characteristics ... 10 Inductor Selection .. 19 Theory of Operation .. 14 Output Capacitor Selection ... 19 Independent Low Dropout Linear Regulator ... 14 MOSFET Selection ... 20 Controller Architecture ... 14 Loop Compensation .. 21 Input Undervoltage Lockout ... 14 Switching Noise and Overshoot Reduction .. 22 Internal Linear Regulator (VCCO) .. 14 PCB Layout Guideline ... 23 Overvoltage Protection .. 15 Typical Applications Circuit ... 23 Power Good ... 15 Packaging and Ordering Information ... 24 Short-Circuit and Current-Limit Protection .. 15 Outline Dimensions ... 24 Shutdown Control .. 15 Ordering Guide .. 24 Thermal Overload Protection ... 16 Applications Information .. 17
REVISION HISTORY 3/2017—Rev. A to Rev. B
Changed CP-32-11 to CP-32-12 .. Throughout Updated Outline Dimensions ... 24 Changes to Ordering Guide .. 24
11/2011—Rev. 0 to Rev. A
Added Evaluation Board to Ordering Guide .. 24
9/2011—Revision 0: Initial Version
Rev. B | Page 2 of 24 Document Outline FEATURES APPLICATIONS TYPICAL OPERATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION INDEPENDENT LOW DROPOUT LINEAR REGULATOR CONTROLLER ARCHITECTURE Synchronous Rectifier and Dead Time INPUT UNDERVOLTAGE LOCKOUT INTERNAL LINEAR REGULATOR (VCCO) OVERVOLTAGE PROTECTION POWER GOOD SHORT-CIRCUIT AND CURRENT-LIMIT PROTECTION SHUTDOWN CONTROL THERMAL OVERLOAD PROTECTION APPLICATIONS INFORMATION INDEPENDENT LOW DROPOUT LINEAR REGULATOR SETTING THE OUTPUT VOLTAGE OF THE CONTROLLER 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 SWITCHING NOISE AND OVERSHOOT REDUCTION PCB LAYOUT GUIDELINE TYPICAL APPLICATIONS CIRCUIT PACKAGING AND ORDERING INFORMATION OUTLINE DIMENSIONS ORDERING GUIDE
ADP1876 Data Sheet TABLE OF CONTENTS
Features .. 1 Independent Low Dropout Linear Regulator ... 17 Applications ... 1 Setting the Output Voltage of the Controller ... 17 Typical Operation Circuit .. 1 Soft Start .. 17 General Description ... 1 Setting the Current Limit .. 17 Revision History ... 2 Accurate Current-Limit Sensing .. 17 Functional Block Diagram .. 3 Setting the Slope Compensation .. 18 Specifications ... 4 Setting the Current Sense Gain .. 18 Absolute Maximum Ratings ... 7 Input Capacitor Selection .. 18 ESD Caution .. 7 Input Filter .. 19 Pin Configuration and Function Descriptions ... 8 Boost Capacitor Selection ... 19 Typical Performance Characteristics ... 10 Inductor Selection .. 19 Theory of Operation .. 14 Output Capacitor Selection ... 19 Independent Low Dropout Linear Regulator ... 14 MOSFET Selection ... 20 Controller Architecture ... 14 Loop Compensation .. 21 Input Undervoltage Lockout ... 14 Switching Noise and Overshoot Reduction .. 22 Internal Linear Regulator (VCCO) .. 14 PCB Layout Guideline ... 23 Overvoltage Protection .. 15 Typical Applications Circuit ... 23 Power Good ... 15 Packaging and Ordering Information ... 24 Short-Circuit and Current-Limit Protection .. 15 Outline Dimensions ... 24 Shutdown Control .. 15 Ordering Guide .. 24 Thermal Overload Protection ... 16 Applications Information .. 17
REVISION HISTORY 3/2017—Rev. A to Rev. B
Changed CP-32-11 to CP-32-12 .. Throughout Updated Outline Dimensions ... 24 Changes to Ordering Guide .. 24
11/2011—Rev. 0 to Rev. A
Added Evaluation Board to Ordering Guide .. 24
9/2011—Revision 0: Initial Version
Rev. B | Page 2 of 24 Document Outline FEATURES APPLICATIONS TYPICAL OPERATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION INDEPENDENT LOW DROPOUT LINEAR REGULATOR CONTROLLER ARCHITECTURE Synchronous Rectifier and Dead Time INPUT UNDERVOLTAGE LOCKOUT INTERNAL LINEAR REGULATOR (VCCO) OVERVOLTAGE PROTECTION POWER GOOD SHORT-CIRCUIT AND CURRENT-LIMIT PROTECTION SHUTDOWN CONTROL THERMAL OVERLOAD PROTECTION APPLICATIONS INFORMATION INDEPENDENT LOW DROPOUT LINEAR REGULATOR SETTING THE OUTPUT VOLTAGE OF THE CONTROLLER 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 SWITCHING NOISE AND OVERSHOOT REDUCTION PCB LAYOUT GUIDELINE TYPICAL APPLICATIONS CIRCUIT PACKAGING AND ORDERING INFORMATION OUTLINE DIMENSIONS ORDERING GUIDE