Datasheet LTC3407A (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator |
| Seiten / Seite | 16 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. … |
| Dateiformat / Größe | PDF / 296 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Load Step. Soft Start. Oscillator Frequency
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LTC3407A
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Load Step Soft Start
VOUT1 200mV/DIV VOUT2 100mV/DIV VIN 2V/DIV IL VOUT1 500mA/DIV 1V/DIV ILOAD I 500mA/DIV L 500mA/DIV 3407 G03 20μs/DIV 3407 G04 V 1ms/DIV IN = 3.6V VIN = 3.6V VOUT = 1.8V VOUT = 1.8V ILOAD = 50mA TO 600mA ILOAD = 500mA CIRCUIT OF FIGURE 3 CIRCUIT OF FIGURE 4
Oscillator Frequency Oscillator Frequency Effi ciency vs Input Voltage vs Temperature vs Supply Voltage
100 1.70 1.8 100mA 90 600mA 1.65 80 1.7 10mA 1mA 1.60 70 1.6 60 1.55 50 1.50 1.5 40 EFFICIENCY (%) 1.45 30 FREQUENCY (MHz) 1.4 1.40 20 OSCILLATOR FREQUENCY (MHz) 1.3 10 V 1.35 OUT = 1.8V CIRCUIT OF FIGURE 3 0 1.30 1.2 2 3 4 5 6 –50 –25 0 25 50 75 100 125 2 3 4 5 6 INPUT VOLTAGE (V) TEMPERATURE (°C) 3407A G06 SUPPLY VOLTAGE (V) 3407A G07 3407A G05
Reference Voltage vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Temperature
0.615 500 550 VIN = 3.6V VIN = 2.7V 500 0.610 450 VIN = 3.6V 450 VIN = 4.2V 0.605 400 MAIN 400 SWITCH (mΩ) 350 (mΩ) 0.600 350 300 DS(ON) DS(ON) R R 0.595 300 250 REFERENCE VOLTAGE (V) SYNCHRONOUS 200 SWITCH 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) 3407A G08 VIN (V) 3407A G09 TEMPERATURE (°C) 3407A G10 3407afa 4
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Load Step Soft Start
VOUT1 200mV/DIV VOUT2 100mV/DIV VIN 2V/DIV IL VOUT1 500mA/DIV 1V/DIV ILOAD I 500mA/DIV L 500mA/DIV 3407 G03 20μs/DIV 3407 G04 V 1ms/DIV IN = 3.6V VIN = 3.6V VOUT = 1.8V VOUT = 1.8V ILOAD = 50mA TO 600mA ILOAD = 500mA CIRCUIT OF FIGURE 3 CIRCUIT OF FIGURE 4
Oscillator Frequency Oscillator Frequency Effi ciency vs Input Voltage vs Temperature vs Supply Voltage
100 1.70 1.8 100mA 90 600mA 1.65 80 1.7 10mA 1mA 1.60 70 1.6 60 1.55 50 1.50 1.5 40 EFFICIENCY (%) 1.45 30 FREQUENCY (MHz) 1.4 1.40 20 OSCILLATOR FREQUENCY (MHz) 1.3 10 V 1.35 OUT = 1.8V CIRCUIT OF FIGURE 3 0 1.30 1.2 2 3 4 5 6 –50 –25 0 25 50 75 100 125 2 3 4 5 6 INPUT VOLTAGE (V) TEMPERATURE (°C) 3407A G06 SUPPLY VOLTAGE (V) 3407A G07 3407A G05
Reference Voltage vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Temperature
0.615 500 550 VIN = 3.6V VIN = 2.7V 500 0.610 450 VIN = 3.6V 450 VIN = 4.2V 0.605 400 MAIN 400 SWITCH (mΩ) 350 (mΩ) 0.600 350 300 DS(ON) DS(ON) R R 0.595 300 250 REFERENCE VOLTAGE (V) SYNCHRONOUS 200 SWITCH 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) 3407A G08 VIN (V) 3407A G09 TEMPERATURE (°C) 3407A G10 3407afa 4