Datasheet LT8631 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 100V, 1A Synchronous Micropower Step-Down Regulator |
| Pages / Page | 26 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency at VOUT = 5V. Efficiency … |
| File Format / Size | PDF / 375 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency at VOUT = 5V. Efficiency at VOUT = 3.3V. Efficiency. Shutdown Supply Current
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LT8631
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency at VOUT = 5V Efficiency at VOUT = 3.3V Efficiency at VOUT = 5V
95 100 100 FSW = 400kHz FSW = 400kHz FSW = 400kHz 90 95 90 85 90 80 80 85 70 80 60 75 75 50 70 70 40 EFFICIENCY (%) 65 EFFICIENCY (%) EFFICIENCY (%) 65 30 60 V 60 20 IN = 12V VIN = 12V VIN = 12V 55 VIN = 24V 55 VIN = 24V 10 VIN = 24V VIN = 48V VIN = 48V VIN = 48V 50 50 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0.00001 0.0001 0.001 0.01 0.1 1 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8631 G01 8631 G02 8631 G03
Efficiency at VOUT = 3.3V Efficiency Shutdown Supply Current
100 100 20.0 FSW = 400kHz 90 17.5 80 95 15.0 70 90 60 12.5 50 85 10.0 40 EFFICIENCY (%) EFFICIENCY (%) CURRENT (µA) 7.5 30 80 V 5.0 20 IN = 12V VIN = 12V 75 VOUT = 5V 10 VIN = 24V LOAD = 0.5A 2.5 VIN = 48V ILRIPPLE = 0.4A 0 70 0 0.00001 0.0001 0.001 0.01 0.1 1 100 200 300 400 500 600 700 800 900 1000 –50 –25 0 25 50 75 100 125 150 LOAD CURRENT (A) SWITCHING FREQUENCY (kHz) TEMPERATURE (°C) 8631 G04 8631 G05 8631 G06
EN/UV Thresholds VIN Undervoltage Lockout Reference Voltage
1.195 2.90 812 EN/UV RISING 1.190 810 1.185 2.85 808 1.180 806 1.175 2.80 TAGE (V) TAGE (V) EN/UV FALLING TAGE (mV) 804 VOL 1.170 VOL VOL 1.165 2.75 802 LOAD = 0mA 800 1.160 LOAD = 100mA LOAD = 1A 1.155 2.70 798 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8631 G07 8631 G08 8631 G09 8631fb For more information www.linear.com/LT8631 5
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency at VOUT = 5V Efficiency at VOUT = 3.3V Efficiency at VOUT = 5V
95 100 100 FSW = 400kHz FSW = 400kHz FSW = 400kHz 90 95 90 85 90 80 80 85 70 80 60 75 75 50 70 70 40 EFFICIENCY (%) 65 EFFICIENCY (%) EFFICIENCY (%) 65 30 60 V 60 20 IN = 12V VIN = 12V VIN = 12V 55 VIN = 24V 55 VIN = 24V 10 VIN = 24V VIN = 48V VIN = 48V VIN = 48V 50 50 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0.00001 0.0001 0.001 0.01 0.1 1 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8631 G01 8631 G02 8631 G03
Efficiency at VOUT = 3.3V Efficiency Shutdown Supply Current
100 100 20.0 FSW = 400kHz 90 17.5 80 95 15.0 70 90 60 12.5 50 85 10.0 40 EFFICIENCY (%) EFFICIENCY (%) CURRENT (µA) 7.5 30 80 V 5.0 20 IN = 12V VIN = 12V 75 VOUT = 5V 10 VIN = 24V LOAD = 0.5A 2.5 VIN = 48V ILRIPPLE = 0.4A 0 70 0 0.00001 0.0001 0.001 0.01 0.1 1 100 200 300 400 500 600 700 800 900 1000 –50 –25 0 25 50 75 100 125 150 LOAD CURRENT (A) SWITCHING FREQUENCY (kHz) TEMPERATURE (°C) 8631 G04 8631 G05 8631 G06
EN/UV Thresholds VIN Undervoltage Lockout Reference Voltage
1.195 2.90 812 EN/UV RISING 1.190 810 1.185 2.85 808 1.180 806 1.175 2.80 TAGE (V) TAGE (V) EN/UV FALLING TAGE (mV) 804 VOL 1.170 VOL VOL 1.165 2.75 802 LOAD = 0mA 800 1.160 LOAD = 100mA LOAD = 1A 1.155 2.70 798 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8631 G07 8631 G08 8631 G09 8631fb For more information www.linear.com/LT8631 5
