Datasheet LTC3770 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Fast No RSENSE Step-Down Synchronous Controller with Margining, Tracking and PLL |
| Pages / Page | 24 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Track Up. Track Down. Transient … |
| File Format / Size | PDF / 273 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Track Up. Track Down. Transient Response. Effi ciency vs Load Current
Model Line for this Datasheet
Text Version of Document
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
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
