Datasheet ADP1828 (Analog Devices) - 2
| Fabricante | Analog Devices |
| Descripción | Synchronous Buck PWM, Step-Down, DC-to-DC Controller |
| Páginas / Página | 33 / 2 — ADP1828. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 8/2018—Rev. D to … |
| Revisión | E |
| Formato / tamaño de archivo | PDF / 908 Kb |
| Idioma del documento | Inglés |
ADP1828. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY 8/2018—Rev. D to Rev. E. 6/2009—Rev. A to Rev. B
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ADP1828 Data Sheet TABLE OF CONTENTS
Features .. 1 Shutdown Control .. 18 Applications ... 1 Tracking ... 18 General Description ... 1 Application Information .. 19 Revision History ... 2 Selecting the Input Capacitor ... 19 Specifications ... 3 Output LC Filter ... 19 Absolute Maximum Ratings .. 6 Selecting the MOSFETs ... 20 ESD Caution .. 6 Setting the Current Limit .. 21 Simplified Block Diagram ... 7 Accurate Current-Limit Sensing .. 21 Pin Configurations and Function Descriptions ... 8 Feedback Voltage Divider ... 21 Typical Performance Characteristics ... 10 Compensating the Voltage Mode Buck Regulator ... 21 Theory of Operation .. 15 Soft Start .. 25 Input Power ... 15 Switching Noise and Overshoot Reduction .. 25 Internal Linear Regulator .. 15 Voltage Tracking ... 25 Soft Start .. 15 Coincident Tracking .. 26 Error Amplifier ... 16 Ratiometric Tracking ... 26 Current-Limit Scheme ... 16 Thermal Considerations .. 28 MOSFET Drivers .. 16 PCB Layout Guideline ... 29 Setting the Output Voltage .. 17 Recommended Component Manufacturers ... 30 Switching Frequency Control and Synchronization .. 17 Application Circuits ... 31 Compensation ... 18 Outline Dimensions ... 33 Power-Good Indicator ... 18 Ordering Guide .. 33 Thermal Shutdown ... 18
REVISION HISTORY 8/2018—Rev. D to Rev. E 6/2009—Rev. A to Rev. B
Updated Outline Dimensions ... 33 Changes to Figure 40 .. 24 Changes to Ordering Guide .. 33
4/2009—Rev. 0 to Rev. A 2/2017—Rev. C to Rev. D
Changes to Features Section and General Description Section ... 1 Updated Outline Dimensions ... 33 Changes to IN Input Voltage Parameter and EN Input Impedance Changes to Ordering Guide .. 34 to 5 V Zener Parameter, Table 1 .. 3 Changes to Table 2 ... 6
11/2010—Rev. B to Rev. C
Changes to Table 3 ... 8 Added 20-Lead LFCSP_WQ ... Universal Changes to Theory of Operation Section and Input Power Changes to Features and General Description Sections .. 1 Section .. 14 Changes to Table 2 .. 6 Changes to MOSFET Drivers Section ... 15 Added Figure 4; Renumbered Sequentially .. 8 Updated Outline Dimensions ... 32 Changes to Table 3 .. 8 Changes to Ordering Guide .. 32 Updated Outline Dimensions ... 33 Added Figure 59; Renumbered Sequentially .. 33
9/2007—Revision 0: Initial Version
Changes to Ordering Guide .. 34 Rev. E | Page 2 of 33 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION SIMPLIFIED BLOCK DIAGRAM PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION INPUT POWER INTERNAL LINEAR REGULATOR SOFT START ERROR AMPLIFIER CURRENT-LIMIT SCHEME MOSFET DRIVERS SETTING THE OUTPUT VOLTAGE SWITCHING FREQUENCY CONTROL AND SYNCHRONIZATION COMPENSATION POWER-GOOD INDICATOR THERMAL SHUTDOWN SHUTDOWN CONTROL TRACKING APPLICATION INFORMATION SELECTING THE INPUT CAPACITOR OUTPUT LC FILTER SELECTING THE MOSFETS SETTING THE CURRENT LIMIT ACCURATE CURRENT-LIMIT SENSING FEEDBACK VOLTAGE DIVIDER COMPENSATING THE VOLTAGE MODE BUCK REGULATOR Type II Compensator Type III Compensator SOFT START SWITCHING NOISE AND OVERSHOOT REDUCTION VOLTAGE TRACKING COINCIDENT TRACKING RATIOMETRIC TRACKING THERMAL CONSIDERATIONS PCB LAYOUT GUIDELINE RECOMMENDED COMPONENT MANUFACTURERS APPLICATION CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE
ADP1828 Data Sheet TABLE OF CONTENTS
Features .. 1 Shutdown Control .. 18 Applications ... 1 Tracking ... 18 General Description ... 1 Application Information .. 19 Revision History ... 2 Selecting the Input Capacitor ... 19 Specifications ... 3 Output LC Filter ... 19 Absolute Maximum Ratings .. 6 Selecting the MOSFETs ... 20 ESD Caution .. 6 Setting the Current Limit .. 21 Simplified Block Diagram ... 7 Accurate Current-Limit Sensing .. 21 Pin Configurations and Function Descriptions ... 8 Feedback Voltage Divider ... 21 Typical Performance Characteristics ... 10 Compensating the Voltage Mode Buck Regulator ... 21 Theory of Operation .. 15 Soft Start .. 25 Input Power ... 15 Switching Noise and Overshoot Reduction .. 25 Internal Linear Regulator .. 15 Voltage Tracking ... 25 Soft Start .. 15 Coincident Tracking .. 26 Error Amplifier ... 16 Ratiometric Tracking ... 26 Current-Limit Scheme ... 16 Thermal Considerations .. 28 MOSFET Drivers .. 16 PCB Layout Guideline ... 29 Setting the Output Voltage .. 17 Recommended Component Manufacturers ... 30 Switching Frequency Control and Synchronization .. 17 Application Circuits ... 31 Compensation ... 18 Outline Dimensions ... 33 Power-Good Indicator ... 18 Ordering Guide .. 33 Thermal Shutdown ... 18
REVISION HISTORY 8/2018—Rev. D to Rev. E 6/2009—Rev. A to Rev. B
Updated Outline Dimensions ... 33 Changes to Figure 40 .. 24 Changes to Ordering Guide .. 33
4/2009—Rev. 0 to Rev. A 2/2017—Rev. C to Rev. D
Changes to Features Section and General Description Section ... 1 Updated Outline Dimensions ... 33 Changes to IN Input Voltage Parameter and EN Input Impedance Changes to Ordering Guide .. 34 to 5 V Zener Parameter, Table 1 .. 3 Changes to Table 2 ... 6
11/2010—Rev. B to Rev. C
Changes to Table 3 ... 8 Added 20-Lead LFCSP_WQ ... Universal Changes to Theory of Operation Section and Input Power Changes to Features and General Description Sections .. 1 Section .. 14 Changes to Table 2 .. 6 Changes to MOSFET Drivers Section ... 15 Added Figure 4; Renumbered Sequentially .. 8 Updated Outline Dimensions ... 32 Changes to Table 3 .. 8 Changes to Ordering Guide .. 32 Updated Outline Dimensions ... 33 Added Figure 59; Renumbered Sequentially .. 33
9/2007—Revision 0: Initial Version
Changes to Ordering Guide .. 34 Rev. E | Page 2 of 33 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION SIMPLIFIED BLOCK DIAGRAM PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION INPUT POWER INTERNAL LINEAR REGULATOR SOFT START ERROR AMPLIFIER CURRENT-LIMIT SCHEME MOSFET DRIVERS SETTING THE OUTPUT VOLTAGE SWITCHING FREQUENCY CONTROL AND SYNCHRONIZATION COMPENSATION POWER-GOOD INDICATOR THERMAL SHUTDOWN SHUTDOWN CONTROL TRACKING APPLICATION INFORMATION SELECTING THE INPUT CAPACITOR OUTPUT LC FILTER SELECTING THE MOSFETS SETTING THE CURRENT LIMIT ACCURATE CURRENT-LIMIT SENSING FEEDBACK VOLTAGE DIVIDER COMPENSATING THE VOLTAGE MODE BUCK REGULATOR Type II Compensator Type III Compensator SOFT START SWITCHING NOISE AND OVERSHOOT REDUCTION VOLTAGE TRACKING COINCIDENT TRACKING RATIOMETRIC TRACKING THERMAL CONSIDERATIONS PCB LAYOUT GUIDELINE RECOMMENDED COMPONENT MANUFACTURERS APPLICATION CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE