Datasheet LTC3770 (Analog Devices) - 6

LTC3770
TYPICAL PERFORMANCE CHARACTERISTICS Track Up Track Down Transient Response
FIGURE 12 CIRCUIT FIGURE 12 CIRCUIT FIGURE 12 CIRCUIT TRACK/SS TRACK/SS VOUT TRACK/SS 100mV/DIV AND V V FB FB V 500mV/DIV FB TRACK/SS AND VFB VOUT VOUT 500mV/DIV VOUT 2V/DIV IL VOUT 5A/DIV 2V/DIV STEP 0A TO 10A 250ms/DIV 3770 G13 250ms/DIV 3770 G14 20μs/DIV 3770 G15
Effi ciency vs Load Current ITH Voltage vs Load Current Frequency vs Input Voltage
100 2.5 480 FIGURE 12 CIRCUIT FIGURE 12 CIRCUIT 95 460 DISCONTINUOUS IOUT = 10A 90 2.0 MODE 440 85 420 80 1.5 400 75 CONTINUOUS CONTINUOUS MODE MODE 380 70 VOLTAGE (V) 1.0 IOUT = 0A EFFICIENCY (%) I TH 360 65 FREQUENCY (kHz) 60 0.5 340 DISCONTINUOUS 55 MODE 320 FCB = 0V FIGURE 12 CIRCUIT 50 0 300 0.01 0.1 1 10 0 2 4 6 8 10 12 0 5 10 15 20 25 30 LOAD CURRENT (A) LOAD CURRENT (A) INPUT VOLTAGE (V) 3770 G16 3770 G17 3770 G18
Effi ciency vs Input Voltage Frequency vs Load Current
100 500 FCB = 5V FIGURE 12 CIRCUIT FIGURE 12 CIRCUIT 450 95 400 350 90 ILOAD = 10A 300 CONTINUOUS MODE 85 250 I 200 LOAD = 1A EFFICIENCY (%) 80 FREQUENCY (kHz) DISCONTINUOUS 150 MODE 100 75 50 70 0 0 5 10 15 20 25 30 0 2 4 6 8 10 12 INPUT VOLTAGE (V) LOAD CURRENT (A) 3770 G19 3770 G20 3770fc 6