Datasheet LT3710 (Analog Devices) - 4

LT3710
W U TYPICAL PERFOR A CE CHARACTERISTICS
∆
VREF vs VCC,
∆
FREQ vs VCC VREF vs Temperature
0.801 CSET = 500pF CSET = 500pF 3 TA = 25°C 2 (mV) 0.800 1 REF ∆VREF ∆V (V) 0 REF ∆ V –1 1 FREQ (kHz) ∆FREQ 0.799 0 –1 0.798 10 15 20 25 –40 –20 0 25 50 75 125 VCC (V) JUNCTION TEMPERATURE (°C) 3710 G04 3710 G05
Frequency vs Temperature CSET vs Switching Frequency
195 500 CSET = 500pF TA = 25°C 1.00 CSET MAXIMUM DUTY CYCLE 200 400 0.95 MAXIMUM DUTY CYCLE 0.90 205 300 0.85 0.80 FREQUENCY (kHz) 210 200 0.75 SWITCHING FREQUENCY (kHz) 0.70 215 100 –40 –20 0 25 50 75 125 200 400 600 800 1000 JUNCTION TEMPERATURE (°C) CSET (pF) 3710 G06 3710 G07
Current Limit Amplifier CA1 Gain G – BIAS vs IGBIAS (Charging 2.2
µ
F) at VCC = 11V, VCL = 5V
8 C V GBIAS = 2.2µF CC = 11V V 300 12 7 CLN = 5V TA = 25°C 250 10 6 VGBIAS 200 8 5 V (V) GBIAS 150 6 OUT 4 CSET PEAK (V) VA 100 4 3 (mA) IGBIAS 50 2 2 I GBIAS CSET VALLEY 0 0 1 0 0 500µs 1ms 50 60 70 80 90 TIME V + – CL – VCL (mV) 3710 G08 3710 G09 3710f 4