Datasheet LTC3873 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | No RSENSE Constant Frequency Current Mode Boost/Flyback/SEPIC DC/DC Controller |
| Pages / Page | 18 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS. Feedback Voltage vs Temperature. … |
| File Format / Size | PDF / 267 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Feedback Voltage vs Temperature. Feedback Voltage Line Regulation
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LTC3873
TYPICAL PERFORMANCE CHARACTERISTICS Feedback Voltage vs Temperature Feedback Voltage Line Regulation ITH Voltage vs RUN/SS Voltage
1.25 1.2025 2.5 VIN = 5V 1.24 1.2020 2.0 1.23 1.2015 1.5 1.2010 TAGE (V) 1.22 TAGE (V) TAGE (V) VOL 1.21 VOL 1.2005 VOL 1.0 V FB V FB I TH 1.20 1.2000 0.5 1.19 1.1995 1.18 1.1990 0 –60 –40 –20 0 20 40 60 80 100 120 5 6 7 8 9 10 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TEMPERATURE (°C) VIN (V) RUN/SS VOLTAGE (V) 3873 G01 3873 G02 3873 G03
Gate Drive Rise and Fall Time Shutdown Mode IQ vs VIN Shutdown IQ vs Temperature vs CLOAD
70 80 100 65 90 70 60 80 60 (µA) 55 (µA) Q 70 Q RISE TIME 50 50 60 FALL TIME 45 40 50 40 TIME (ns) 40 30 35 30 SHUTDOWN MODE I 20 30 SHUTDOWN MODE I 20 25 10 10 20 0 0 3 4 5 6 7 8 9 10 –60 –40 –20 0 20 40 60 80 100 120 0 2000 4000 6000 8000 10000 VIN (V) TEMPERATURE (°C) CLOAD (pF) 3873 G04 3873 G05 3873 G06
Shunt Regulation Voltage RUN Threshold vs Temperature vs ISHUNT
1.0 10.2 10.1 0.9 10.0 9.9 0.8 RISING TAGE (V) 9.8 9.7 FALLING 0.7 TION VOL 9.6 RUN THRESHOLDS (V) 9.5 REGULA 0.6 9.4 9.3 0.5 9.2 –60 –40 –20 0 20 40 60 80 100 120 0 5 10 15 20 25 30 35 40 45 TEMPERATURE (°C) ISHUNT (mA) 3873 G07 3873 G08 3873fb 4 For more information www.linear.com/LTC3873
TYPICAL PERFORMANCE CHARACTERISTICS Feedback Voltage vs Temperature Feedback Voltage Line Regulation ITH Voltage vs RUN/SS Voltage
1.25 1.2025 2.5 VIN = 5V 1.24 1.2020 2.0 1.23 1.2015 1.5 1.2010 TAGE (V) 1.22 TAGE (V) TAGE (V) VOL 1.21 VOL 1.2005 VOL 1.0 V FB V FB I TH 1.20 1.2000 0.5 1.19 1.1995 1.18 1.1990 0 –60 –40 –20 0 20 40 60 80 100 120 5 6 7 8 9 10 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TEMPERATURE (°C) VIN (V) RUN/SS VOLTAGE (V) 3873 G01 3873 G02 3873 G03
Gate Drive Rise and Fall Time Shutdown Mode IQ vs VIN Shutdown IQ vs Temperature vs CLOAD
70 80 100 65 90 70 60 80 60 (µA) 55 (µA) Q 70 Q RISE TIME 50 50 60 FALL TIME 45 40 50 40 TIME (ns) 40 30 35 30 SHUTDOWN MODE I 20 30 SHUTDOWN MODE I 20 25 10 10 20 0 0 3 4 5 6 7 8 9 10 –60 –40 –20 0 20 40 60 80 100 120 0 2000 4000 6000 8000 10000 VIN (V) TEMPERATURE (°C) CLOAD (pF) 3873 G04 3873 G05 3873 G06
Shunt Regulation Voltage RUN Threshold vs Temperature vs ISHUNT
1.0 10.2 10.1 0.9 10.0 9.9 0.8 RISING TAGE (V) 9.8 9.7 FALLING 0.7 TION VOL 9.6 RUN THRESHOLDS (V) 9.5 REGULA 0.6 9.4 9.3 0.5 9.2 –60 –40 –20 0 20 40 60 80 100 120 0 5 10 15 20 25 30 35 40 45 TEMPERATURE (°C) ISHUNT (mA) 3873 G07 3873 G08 3873fb 4 For more information www.linear.com/LTC3873
