Datasheet LTC1871 (Analog Devices) - 5

LTC1871
TYPICAL PERFORMANCE CHARACTERISTICS FB Voltage vs Temp FB Voltage Line Regulation FB Pin Current vs Temperature
1.25 1.231 60 50 1.24 40 1.23 1.230 30 FB VOLTAGE (V) FB VOLTAGE (V) 20 FB PIN CURRENT (nA) 1.22 10 1.21 1.229 0 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 1871 G01 1871 G02 1871 G03
Shutdown Mode IQ vs VIN Shutdown Mode IQ vs Temperature Burst Mode IQ vs VIN
30 20 600 VIN = 5V 500 15 (μA) (μA) Q 20 Q 400 (μA) Q 10 300 10 Burst Mode I 200 SHUTDOWN MODE I SHUTDOWN MODE I 5 100 0 0 0 0 10 20 30 40 –50 –25 0 25 50 75 100 125 150 0 10 20 30 40 VIN (V) TEMPERATURE (°C) VIN (V) 1871 G04 1871 G05 1871 G06
Gate Drive Rise and Burst Mode IQ vs Temperature Dynamic IQ vs Frequency Fall Time vs CL
500 18 60 CL = 3300pF 16 IQ(TOT) = 550μA + Qg • f 50 400 14 12 40 (μA) Q 300 RISE TIME 10 (mA) 30 I Q 8 200 TIME (ns) Burst Mode I 6 20 FALL TIME 100 4 10 2 0 0 0 –50 –25 0 25 50 75 100 125 150 0 200 400 600 800 1000 1200 0 2000 4000 6000 8000 10000 12000 TEMPERATURE (°C) FREQUENCY (kHz) CL (pF) 1871 G07 1871 G08 1871 G09 1871fe 5