Datasheet LT8337 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru |
| 页数 / 页 | 25 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise … |
| 文件格式/大小 | PDF / 2.5 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted. Minimum On/Off Times vs
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LT8337/LT8337-1
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted. Minimum On/Off Times vs Switching Waveforms, Full Switching Waveforms, Temperature Frequency PWM Operation Continuous Burst Mode Operation
70 VOUT = 30V I 60 L 2A/DIV IL 50 MIN ON TIME 1A/DIV 0A 0A 40 MIN OFF TIME VSW VSW 30 10V/DIV 10V/DIV 20 MIN ON/OFF TIMES (ns) 2μs/DIV 83371 G23 2μs/DIV 83371 G24 10 VIN = 5V VIN = 5V ILOAD = 1.2A ILOAD = 250mA 0 FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 83371 G22
Switching Waveforms, Switching Waveforms, Light Load Switching Waveforms, Discontinuous Burst Mode Operation Low IQ Burst Mode Operation Discontinuous Pulse-Skipping Mode
I I L L IL 0.5A/DIV 1A/DIV 1A/DIV 0A 0A 0A VSW VSW V 10V/DIV 10V/DIV SW 10V/DIV 5μs/DIV 83371 G25 10ms/DIV 83371 G26 500ns/DIV 83371 G27 VIN = 5V VIN = 5V VIN = 7.2V ILOAD = 50mA ILOAD = 0mA ILOAD = 10mA FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT
Waveforms, PassThru Waveforms, Reverse Current Switching Waveforms, Frequency Mode Operation Protection in PassThru Mode Foldback when VIN is close to VOUT
V VOUT 15V V IN VOUT, VIN V OUT, VIN VOUT OUT, VIN 1V/DIV 1V/DIV 1V/DIV V 15.6V V OUT IN V I IN L I 1A/DIV L 1A/DIV IL 1A 1A 2A/DIV 200mA –1.6A V V V SW SW SW 20V/DIV 20V/DIV 20V/DIV 0V 5μs/DIV 83371 G28 50μs/DIV 83371 G29 5μs/DIV 83371 G30 ILOAD = 1A FRONT PAGE CIRCUIT ILOAD = 1A VIN = 15.5V FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT Rev. A For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted. Minimum On/Off Times vs Switching Waveforms, Full Switching Waveforms, Temperature Frequency PWM Operation Continuous Burst Mode Operation
70 VOUT = 30V I 60 L 2A/DIV IL 50 MIN ON TIME 1A/DIV 0A 0A 40 MIN OFF TIME VSW VSW 30 10V/DIV 10V/DIV 20 MIN ON/OFF TIMES (ns) 2μs/DIV 83371 G23 2μs/DIV 83371 G24 10 VIN = 5V VIN = 5V ILOAD = 1.2A ILOAD = 250mA 0 FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 83371 G22
Switching Waveforms, Switching Waveforms, Light Load Switching Waveforms, Discontinuous Burst Mode Operation Low IQ Burst Mode Operation Discontinuous Pulse-Skipping Mode
I I L L IL 0.5A/DIV 1A/DIV 1A/DIV 0A 0A 0A VSW VSW V 10V/DIV 10V/DIV SW 10V/DIV 5μs/DIV 83371 G25 10ms/DIV 83371 G26 500ns/DIV 83371 G27 VIN = 5V VIN = 5V VIN = 7.2V ILOAD = 50mA ILOAD = 0mA ILOAD = 10mA FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT
Waveforms, PassThru Waveforms, Reverse Current Switching Waveforms, Frequency Mode Operation Protection in PassThru Mode Foldback when VIN is close to VOUT
V VOUT 15V V IN VOUT, VIN V OUT, VIN VOUT OUT, VIN 1V/DIV 1V/DIV 1V/DIV V 15.6V V OUT IN V I IN L I 1A/DIV L 1A/DIV IL 1A 1A 2A/DIV 200mA –1.6A V V V SW SW SW 20V/DIV 20V/DIV 20V/DIV 0V 5μs/DIV 83371 G28 50μs/DIV 83371 G29 5μs/DIV 83371 G30 ILOAD = 1A FRONT PAGE CIRCUIT ILOAD = 1A VIN = 15.5V FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT Rev. A For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts