Datasheet LTC3407-3 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Dual Synchronous, 1.8V/0.8A and 3.3V/0.8A 2.25MHz Step-Down DC/DC Regulator |
| Pages / Page | 16 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. … |
| File Format / Size | PDF / 269 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Oscillator Frequency vs
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LTC3407-3
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Oscillator Frequency vs Oscillator Frequency Deviation Load Step Temperature vs Supply Voltage
2.5 10 V VIN = 3.6V OUT 8 200mV/DIV 2.4 6 4 IL 500mA/DIV 2.3 2 0 ILOAD 2.2 –2 500mA/DIV FREQUENCY (MHz) –4 2.1 FREQUENCY DEVIATION (%) –6 34073 G04 VIN = 5V 20μs/DIV V –8 OUT = 3.3V ILOAD = 80mA TO 800mA 2.0 –10 CIRCUIT OF FIGURE 1 –50 –25 0 25 50 75 100 125 2 3 4 5 6 TEMPERATURE (°C) SUPPLY VOLTAGE (V) 34073 G05 34073 G06
Reference Voltage vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Temperature
0.615 500 550 VIN = 3.6V 500 0.610 450 V 450 IN = 3.6V VIN = 4.2V 0.605 400 ) 400 ) Ω MAIN Ω (m SWITCH 350 (m 0.600 350 300 DS(ON)R DS(ON)R 0.595 300 250 SYNCHRONOUS REFERENCE VOLTAGE (V) SWITCH 200 0.590 250 150 MAIN SWITCH SYNCHRONOUS SWITCH 0.585 200 100 –50 –25 0 25 50 75 100 125 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 34073 G07 34073 G08 34073 G09
Effi ciency vs VIN Effi ciency vs Load Current Effi ciency vs Load Current
100 100 100 95 95 90 Burst Mode OPERATION 10mA 100mA 90 90 Burst Mode OPERATION 85 800mA 85 80 1mA 75 80 80 PULSE-SKIPPING 70 75 MODE PULSE-SKIPPING EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) MODE 65 70 V 70 60 IN = 5V, V V OUT = 1.8V OUT = 3.3V 65 55 Burst Mode OPERATION NO LOAD ON VIN = 3.6V, VOUT = 1.8V CH2 OFF OTHER CHANNEL NO LOAD ON OTHER CHANNEL 50 60 60 2 3 4 5 6 1 10 100 1000 1 10 100 1000 INPUT VOLTAGE (V) LOAD CURRENT (mA) LOAD CURRENT (mA) 34073 G14 34073 G10 34073 G11 34073fb 4
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Oscillator Frequency vs Oscillator Frequency Deviation Load Step Temperature vs Supply Voltage
2.5 10 V VIN = 3.6V OUT 8 200mV/DIV 2.4 6 4 IL 500mA/DIV 2.3 2 0 ILOAD 2.2 –2 500mA/DIV FREQUENCY (MHz) –4 2.1 FREQUENCY DEVIATION (%) –6 34073 G04 VIN = 5V 20μs/DIV V –8 OUT = 3.3V ILOAD = 80mA TO 800mA 2.0 –10 CIRCUIT OF FIGURE 1 –50 –25 0 25 50 75 100 125 2 3 4 5 6 TEMPERATURE (°C) SUPPLY VOLTAGE (V) 34073 G05 34073 G06
Reference Voltage vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Temperature
0.615 500 550 VIN = 3.6V 500 0.610 450 V 450 IN = 3.6V VIN = 4.2V 0.605 400 ) 400 ) Ω MAIN Ω (m SWITCH 350 (m 0.600 350 300 DS(ON)R DS(ON)R 0.595 300 250 SYNCHRONOUS REFERENCE VOLTAGE (V) SWITCH 200 0.590 250 150 MAIN SWITCH SYNCHRONOUS SWITCH 0.585 200 100 –50 –25 0 25 50 75 100 125 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 34073 G07 34073 G08 34073 G09
Effi ciency vs VIN Effi ciency vs Load Current Effi ciency vs Load Current
100 100 100 95 95 90 Burst Mode OPERATION 10mA 100mA 90 90 Burst Mode OPERATION 85 800mA 85 80 1mA 75 80 80 PULSE-SKIPPING 70 75 MODE PULSE-SKIPPING EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) MODE 65 70 V 70 60 IN = 5V, V V OUT = 1.8V OUT = 3.3V 65 55 Burst Mode OPERATION NO LOAD ON VIN = 3.6V, VOUT = 1.8V CH2 OFF OTHER CHANNEL NO LOAD ON OTHER CHANNEL 50 60 60 2 3 4 5 6 1 10 100 1000 1 10 100 1000 INPUT VOLTAGE (V) LOAD CURRENT (mA) LOAD CURRENT (mA) 34073 G14 34073 G10 34073 G11 34073fb 4
