Datasheet ADP5303 (Analog Devices) - 2
| Fabricante | Analog Devices |
| Descripción | 50 mA/500 mA, Ultralow Power Step-Down Regulator with Battery Voltage Monitor |
| Páginas / Página | 21 / 2 — ADP5303. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 6/2016—Rev. 0 to … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 768 Kb |
| Idioma del documento | Inglés |
ADP5303. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 6/2016—Rev. 0 to Rev. A. 10/2015—Revision 0: Initial Version
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ADP5303 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 Cycle Operation ... 15 Revision History ... 2 Active Discharge ... 15 Detailed Functional Block Diagram .. 3 VINOK Function.. 15 Specifications ... 4 Thermal Shutdown .. 15 Absolute Maximum Ratings .. 6 Applications Information .. 16 Thermal Resistance .. 6 External Component Selection .. 16 ESD Caution .. 6 Selecting the Inductor .. 16 Pin Configuration and Function Descriptions ... 7 Output Capacitor .. 16 Typical Performance Characteristics ... 8 Input Capacitor ... 17 Theory of Operation .. 14 Efficiency ... 17 Buck Regulator Operational Modes ... 14 Printed Circuit Board Layout Recommendations ... 18 Oscillator and Synchronization .. 14 Typical Application Circuits ... 19 Adjustable and Fixed Output Voltages .. 14 Factory Programmable Options ... 20 Undervoltage Lockout (UVLO) ... 15 Outline Dimensions ... 21 Enable/Disable .. 15 Ordering Guide .. 21 Current Limit .. 15
REVISION HISTORY 6/2016—Rev. 0 to Rev. A
Change 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 Changes to Table 8 .. 20
10/2015—Revision 0: Initial Version
Rev. A | Page 2 of 21 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 CYCLE OPERATION ACTIVE DISCHARGE VINOK FUNCTION 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
ADP5303 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 Cycle Operation ... 15 Revision History ... 2 Active Discharge ... 15 Detailed Functional Block Diagram .. 3 VINOK Function.. 15 Specifications ... 4 Thermal Shutdown .. 15 Absolute Maximum Ratings .. 6 Applications Information .. 16 Thermal Resistance .. 6 External Component Selection .. 16 ESD Caution .. 6 Selecting the Inductor .. 16 Pin Configuration and Function Descriptions ... 7 Output Capacitor .. 16 Typical Performance Characteristics ... 8 Input Capacitor ... 17 Theory of Operation .. 14 Efficiency ... 17 Buck Regulator Operational Modes ... 14 Printed Circuit Board Layout Recommendations ... 18 Oscillator and Synchronization .. 14 Typical Application Circuits ... 19 Adjustable and Fixed Output Voltages .. 14 Factory Programmable Options ... 20 Undervoltage Lockout (UVLO) ... 15 Outline Dimensions ... 21 Enable/Disable .. 15 Ordering Guide .. 21 Current Limit .. 15
REVISION HISTORY 6/2016—Rev. 0 to Rev. A
Change 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 Changes to Table 8 .. 20
10/2015—Revision 0: Initial Version
Rev. A | Page 2 of 21 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 CYCLE OPERATION ACTIVE DISCHARGE VINOK FUNCTION 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