Datasheet ADP5302 (Analog Devices) - 2
| Fabricante | Analog Devices |
| Descripción | 50 mA/500 mA, Ultralow Power Step-Down Regulator with Battery Voltage Monitor |
| Páginas / Página | 22 / 2 — ADP5302. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 6/2016—Rev. 0 … |
| Revisión | A |
| Formato / tamaño de archivo | PDF / 758 Kb |
| Idioma del documento | Inglés |
ADP5302. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 6/2016—Rev. 0 to Rev. A. 9/2015—Revision 0: Initial Version
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ADP5302 Data Sheet TABLE OF CONTENTS
Features .. 1 Short-Circuit Protection .. 15 Applications ... 1 Soft Start .. 15 Typical Application Circuit ... 1 Startup with Precharged Output .. 15 General Description ... 1 100% Duty Operation .. 15 Revision History ... 2 Active Discharge ... 15 Detailed Functional Block Diagram .. 3 VINOK Function.. 15 Specifications ... 4 STOP Switching .. 16 Absolute Maximum Ratings .. 6 Thermal Shutdown .. 16 Thermal Resistance .. 6 Applications Information .. 17 ESD Caution .. 6 External Component Selection .. 17 Pin Configuration and Function Descriptions ... 7 Selecting the Inductor .. 17 Typical Performance Characteristics ... 8 Output Capacitor .. 17 Theory of Operation .. 14 Input Capacitor ... 18 Buck Regulator Operational Modes ... 14 Efficiency ... 18 Oscillator and Synchronization .. 14 Printed Circuit Board Layout Recommendations ... 19 Adjustable and Fixed Output Voltages .. 14 Typical Application Circuits ... 20 Undervoltage Lockout (UVLO) ... 15 Factory Programmable Options ... 21 Enable/Disable .. 15 Outline Dimensions ... 22 Current Limit .. 15 Ordering Guide .. 22
REVISION HISTORY 6/2016—Rev. 0 to Rev. A
Changes to Features Section and General Description Section ... 1 Change to SYNC Clock Range Parameter, Table 1 .. 4 Change to Table 4 ... 7 Change to Oscillator and Synchronization Section ... 14
9/2015—Revision 0: Initial Version
Rev. A | Page 2 of 22 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode Hysteresis Mode Mode Selection OSCILLATOR AND SYNCHRONIZATION ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE/DISABLE CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY OPERATION ACTIVE DISCHARGE VINOK FUNCTION STOP SWITCHING THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE
ADP5302 Data Sheet TABLE OF CONTENTS
Features .. 1 Short-Circuit Protection .. 15 Applications ... 1 Soft Start .. 15 Typical Application Circuit ... 1 Startup with Precharged Output .. 15 General Description ... 1 100% Duty Operation .. 15 Revision History ... 2 Active Discharge ... 15 Detailed Functional Block Diagram .. 3 VINOK Function.. 15 Specifications ... 4 STOP Switching .. 16 Absolute Maximum Ratings .. 6 Thermal Shutdown .. 16 Thermal Resistance .. 6 Applications Information .. 17 ESD Caution .. 6 External Component Selection .. 17 Pin Configuration and Function Descriptions ... 7 Selecting the Inductor .. 17 Typical Performance Characteristics ... 8 Output Capacitor .. 17 Theory of Operation .. 14 Input Capacitor ... 18 Buck Regulator Operational Modes ... 14 Efficiency ... 18 Oscillator and Synchronization .. 14 Printed Circuit Board Layout Recommendations ... 19 Adjustable and Fixed Output Voltages .. 14 Typical Application Circuits ... 20 Undervoltage Lockout (UVLO) ... 15 Factory Programmable Options ... 21 Enable/Disable .. 15 Outline Dimensions ... 22 Current Limit .. 15 Ordering Guide .. 22
REVISION HISTORY 6/2016—Rev. 0 to Rev. A
Changes to Features Section and General Description Section ... 1 Change to SYNC Clock Range Parameter, Table 1 .. 4 Change to Table 4 ... 7 Change to Oscillator and Synchronization Section ... 14
9/2015—Revision 0: Initial Version
Rev. A | Page 2 of 22 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode Hysteresis Mode Mode Selection OSCILLATOR AND SYNCHRONIZATION ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE/DISABLE CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY OPERATION ACTIVE DISCHARGE VINOK FUNCTION STOP SWITCHING THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE