Datasheet ADP2387 (Analog Devices) - 2

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ADP2387 Data Sheet TABLE OF CONTENTS
Features .. 1 Applications Information .. 15 Applications ... 1 Input Capacitor Selection .. 15 Typical Applications Circuit .. 1 Output Voltage Setting .. 15 General Description ... 1 Voltage Conversion Limitations ... 15 Revision History ... 2 Inductor Selection .. 16 Functional Block Diagram .. 3 Output Capacitor Selection... 16 Specifications ... 4 Programming Input Voltage UVLO .. 17 Absolute Maximum Ratings .. 6 Compensation Design ... 17 Thermal Resistance .. 6 ADIsimPower Design Tool ... 18 ESD Caution .. 6 Design Example .. 19 Pin Configuration and Function Descriptions ... 7 Output Voltage Setting .. 19 Typical Performance Characteristics ... 8 Frequency Setting ... 19 Theory of Operation .. 12 Current-Limit Threshold Setting ... 19 Control Scheme .. 12 Inductor Selection .. 19 Precision Enable/Shutdown .. 12 Output Capacitor Selection... 20 Internal Regulator (VREG) ... 12 Compensation Components ... 20 Bootstrap Circuitry .. 12 Soft Start Time Program ... 20 Oscillator ... 12 Input Capacitor Selection .. 20 Soft Start .. 12 Recommended External Components .. 21 Power Good ... 13 Circuit Board Layout Recommendations ... 22 Peak Current-Limit and Short-Circuit Protection ... 13 Typical Applications Circuits .. 24 Overvoltage Protection (OVP) ... 13 Outline Dimensions ... 25 Undervoltage Lockout (UVLO) ... 14 Ordering Guide .. 25 Thermal Shutdown ... 14
REVISION HISTORY 4/2017—Rev. B to Rev. C
Added Maximum Junction Temperature Parameter, Table 2 ... 6
1/2016—Revision B: Initial Version
Rev. C | Page 2 of 25 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PRECISION ENABLE/SHUTDOWN INTERNAL REGULATOR (VREG) BOOTSTRAP CIRCUITRY OSCILLATOR SOFT START POWER GOOD PEAK CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTION OVERVOLTAGE PROTECTION (OVP) UNDERVOLTAGE LOCKOUT (UVLO) THERMAL SHUTDOWN APPLICATIONS INFORMATION INPUT CAPACITOR SELECTION OUTPUT VOLTAGE SETTING VOLTAGE CONVERSION LIMITATIONS INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION PROGRAMMING INPUT VOLTAGE UVLO COMPENSATION DESIGN ADIsimPower DESIGN TOOL DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING CURRENT-LIMIT THRESHOLD SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION RECOMMENDED EXTERNAL COMPONENTS CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATIONS CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE