Datasheet LT8607, LT8607B (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 42V, 750mA Synchronous Step-Down Regulator with 2.5μA Quiescent Current |
| 页数 / 页 | 22 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 修订版 | C |
| 文件格式/大小 | PDF / 1.3 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Top FET Current Limit. vs Duty Cycle. vs Temperature
文件文字版本
LT8607/LT8607B
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Top FET Current Limit Top FET Current Limit vs Duty Cycle vs Temperature Switch Drop vs Temperature
1.70 1.70 450 DUTY CYCLE = 0 SWITCH CURRENT = 750mA 400 1.60 1.65 350 1.50 300 1.60 250 1.40 200 SWITCH DROP (mV) 1.55 150 TOP FET CURRENT LIMIT (A) 1.30 TOP FET CURRENT LIMIT (A) 100 TOP SW BOT SW 1.20 1.50 50 0 20 40 60 80 100 –50 –10 30 70 110 150 –50 –30 –10 10 30 50 70 90 110 130 150 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 8607 G10 8607 G11 8607 G12
Minimum On-Time Minimum Off-Time Switch Drop vs Switch Current vs Temperature vs Temperature
300 38 110 TOP SW IOUT = 750mA BOT SW 250 37 105 200 36 100 150 35 95 100 SWITCH DROP (mV) 34 90 MINIMUM ON-TIME (ns) MINIMUM OFF-TIME (ns) 50 33 85 IOUT = 350mA 0 32 80 0 125 250 375 500 625 750 –50 –30 –10 10 30 50 70 90 110 130 150 –50 –30 –10 10 30 50 70 90 110 130 150 SWITCH CURRENT (mA) TEMPERATURE (°C) TEMPERATURE (°C) 8607 G13 8607 G14 8607 G15
Switching Frequency Burst Frequency vs Dropout Voltage vs Output Current vs Temperature Output Current
350 2025 2500 L: XFL4020-472ME RT = 18.2kΩ L = 2.2µH 2020 2250 V 300 IN = 12V 2015 2000 VOUT = 3.3V SYNC = 0V OR LT8607 DFN 250 2010 1750 2005 1500 TAGE (mV) 200 2000 1250 150 1995 1000 100 1990 750 DROPOUT VOL SWITCHING FREQUENCY (kHz) 1985 SWITCHING FREQUENCY (kHz) 500 50 1980 250 0 1975 0 0 125 250 375 500 625 750 –50 –10 30 70 110 150 0 25 50 75 100 125 OUTPUT CURRENT (A) TEMPERATURE (°C) OUTPUT CURRENT (mA) 8607 G16 8607 G17 8607 G18 Rev. C For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Top FET Current Limit Top FET Current Limit vs Duty Cycle vs Temperature Switch Drop vs Temperature
1.70 1.70 450 DUTY CYCLE = 0 SWITCH CURRENT = 750mA 400 1.60 1.65 350 1.50 300 1.60 250 1.40 200 SWITCH DROP (mV) 1.55 150 TOP FET CURRENT LIMIT (A) 1.30 TOP FET CURRENT LIMIT (A) 100 TOP SW BOT SW 1.20 1.50 50 0 20 40 60 80 100 –50 –10 30 70 110 150 –50 –30 –10 10 30 50 70 90 110 130 150 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 8607 G10 8607 G11 8607 G12
Minimum On-Time Minimum Off-Time Switch Drop vs Switch Current vs Temperature vs Temperature
300 38 110 TOP SW IOUT = 750mA BOT SW 250 37 105 200 36 100 150 35 95 100 SWITCH DROP (mV) 34 90 MINIMUM ON-TIME (ns) MINIMUM OFF-TIME (ns) 50 33 85 IOUT = 350mA 0 32 80 0 125 250 375 500 625 750 –50 –30 –10 10 30 50 70 90 110 130 150 –50 –30 –10 10 30 50 70 90 110 130 150 SWITCH CURRENT (mA) TEMPERATURE (°C) TEMPERATURE (°C) 8607 G13 8607 G14 8607 G15
Switching Frequency Burst Frequency vs Dropout Voltage vs Output Current vs Temperature Output Current
350 2025 2500 L: XFL4020-472ME RT = 18.2kΩ L = 2.2µH 2020 2250 V 300 IN = 12V 2015 2000 VOUT = 3.3V SYNC = 0V OR LT8607 DFN 250 2010 1750 2005 1500 TAGE (mV) 200 2000 1250 150 1995 1000 100 1990 750 DROPOUT VOL SWITCHING FREQUENCY (kHz) 1985 SWITCHING FREQUENCY (kHz) 500 50 1980 250 0 1975 0 0 125 250 375 500 625 750 –50 –10 30 70 110 150 0 25 50 75 100 125 OUTPUT CURRENT (A) TEMPERATURE (°C) OUTPUT CURRENT (mA) 8607 G16 8607 G17 8607 G18 Rev. C For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts