Datasheet LT3494, LT3494A (Analog Devices) - 4

LT3494/LT3494A
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Output Voltage vs Temperature Minimum Switching Frequency Quiescent Current–Not Switching
2.0 51.0 100 LT3494 VCC = 3.6V 95 1.5 FIGURE 5 CIRCUIT NO LOAD 50.5 90 1.0 50.0 85 0.5 49.5 80 μA) 0 49.0 ( 75 I VCC 70 –0.5 48.5 65 –1.0 48.0 OUTPUT VOLTAGE CHANGE (%) SWITCHING FREQUENCY (kHz) 60 –1.5 47.5 55 –2.0 47.0 50 –40 –20 0 20 40 60 80 100 120 –40 –20 0 20 40 60 80 100 120 3 4 5 6 7 8 9 10 TEMPERATURE (°C) TEMPERATURE (°C) VCC (V) 3494 G04 3494 G05 3494 G06
SHDN Current vs SHDN Voltage Peak Inductor Current (LT3494) Peak Inductor Current (LT3494A)
20 400 700 FIGURE 5 CIRCUIT FIGURE 6 CIRCUIT VCC = 3.6V VCC = 3.6V 350 VOUT = 16V 650 VOUT = 16V μA) 15 300 600 10 250 550 200 500 SHDN PIN CURRENT ( 5 PEAK INDUCTOR CURRENT (mA) 150 PEAK INDUCTOR CURRENT (mA) 450 0 100 400 0 2 4 6 8 10 12 14 16 –40 –20 0 20 40 60 80 100 120 –40 –20 0 20 40 60 80 100 120 SHDN PIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3494 G07 3494 G08 3494 G09
LT3494 Switching Waveforms at LT3494 Switching Waveforms at LT3494 Switching Waveforms at No Load 1mA Load 25mA Load
FIGURE 5 CIRCUIT FIGURE 5 CIRCUIT FIGURE 5 CIRCUIT VOUT VOUT VOUT 10mV/DIV 10mV/DIV 10mV/DIV AC AC AC COUPLED COUPLED COUPLED SW SW SW VOLTAGE VOLTAGE VOLTAGE 10V/DIV 10V/DIV 10V/DIV INDUCTOR INDUCTOR CURRENT 100mA/DIV INDUCTOR CURRENT CURRENT 100mA/DIV 50mA/DIV 3494 G10 V 3494 G11 3494 G12 CC = 3.6V 5μs/DIV V 2 CC = 3.6V μs/DIV V 500ns/DIV CC = 3.6V VOUT = 16V VOUT = 16V VOUT = 16V 3494fb 4