Datasheet LTC3862 (Linear Technology) - 7

LTC3862
Typical perForMance characTerisTics Maximum Current Sense Threshold vs Duty Cycle RUN Threshold vs Temperature RUN Threshold vs Input Voltage
80 1.30 1.5 75 SLOPE = 0.625 ON 1.4 1.25 70 SLOPE = 1 1.3 SLOPE = 1.66 65 1.20 ON OFF 1.2 60 RUN PIN VOLTAGE (V) OFF 1.15 RUN PIN VOLTAGE (V) 1.1 55 MAXIMUM CURRENT SENSE THRESHOLD (mV) 50 1.10 1.0 0 10 20 30 40 50 60 70 80 90 100 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 DUTY CYCLE (%) TEMPERATURE (°C) INPUT VOLTAGE (V) 3862 G18 3862 G09 3862 G20
RUN (Off) Source Current vs RUN (On) Source Current vs RUN Source Current vs Temperature Temperature Input Voltage
0 0 0 –0.1 –1 –1 –0.2 –2 –0.3 –2 –0.4 –3 –3 –0.5 –4 –0.6 –4 –5 –0.7 RUN PIN CURRENT (µA) RUN PIN CURRENT (µA) –5 –6 RUN PIN CURRENT (µA) –0.8 –6 –0.9 –7 –1.0 –8 –7 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 4 8 12 16 20 24 28 32 36 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3862 G21vv 1344 G06 3862 G23
Soft-Start Current vs Oscillator Frequency vs Soft-Start Current vs Temperature Soft-Start Voltage Temperature
–5.0 0 307 306 –5.1 –1 305 –5.2 –2 304 303 –5.3 –3 302 –5.4 –4 FREQUENCY (kHz) 301 SOFT-START CURRENT (µA) SOFT-START CURRENT (µA) 300 –5.5 –5 299 –5.6 –6 298 –50 –25 0 25 50 75 100 125 150 0 0.5 1 1.5 2 2.5 3 3.5 4 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) SOFT-START VOLTAGE (V) TEMPERATURE (°C) 3862 G24 3862 G25 3862 G26 3862fc For more information www.linear.com/LTC3862 7 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts