Datasheet LTC3405A-1.375 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 1.375V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT |
| Pages / Page | 12 / 3 — TYPICAL PERFOR A CE CHARACTERISTICS TA = 25. C unless otherwise noted. … |
| File Format / Size | PDF / 267 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25. C unless otherwise noted. (From Figure1a). Efficiency vs Input Voltage
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LTC3405A-1.375
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. (From Figure1a) Efficiency vs Input Voltage Efficiency vs Output Current Efficiency vs Output Current
90 100 100 Burst Mode OPERATION 90 90 80 80 80 IOUT = 0.1mA 70 70 IOUT = 1mA PULSE SKIPPING MODE 60 I 70 OUT = 10mA 60 IOUT = 100mA 50 IOUT = 250mA 60 40 EFFICIENCY (%) EFFICIENCY (%) 50 EFFICIENCY (%) 30 50 V 3.6V IN = 2.7V Burst Mode OPERATION 20 V 40 4.2V 40 IN = 3.6V V 3.6V IN = 4.2V 10 V 4.2V IN = 5.5V 30 30 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 3405A1375 G03 3405A1375 G01 3405A1375 G02
Oscillator Frequency vs Oscillator Frequency vs Temperature Supply Voltage Output Voltage vs Load Current
1.70 1.8 1.395 VIN = 3.6V 1.65 1.7 1.385 1.60 Burst Mode OPERATION 1.6 1.55 1.375 PULSE SKIPPING MODE 1.50 1.5 1.45 1.365 FREQUENCY (MHz) 1.4 OUTPUT VOLTAGE (V) 1.40 1.355 OSCILLATOR FREQUENCY (MHz) 1.3 1.35 1.30 1.2 1.345 –50 –25 0 25 50 75 100 125 2 3 4 5 6 0 100 200 300 400 500 TEMPERATURE (°C) SUPPLY VOLTAGE (V) CURRENT LOAD (mA) 3405A1375 G05 3405A1375 G04 3405A1375 G06
RDS(ON) vs Input Voltage RDS(ON) vs Temperature
1.2 1.2 1.1 VIN = 4.2V 1.0 1.0 VIN = 2.7V VIN = 3.6V 0.9 MAIN SWITCH 0.8 0.8 ) Ω 0.7 Ω ( 0.6 0.6 SYNCHRONOUS DS(0N) 0.5 DS(ON) R SWITCH R 0.4 0.4 0.3 0.2 0.2 SYNCHRONOUS SWITCH 0.1 MAIN SWITCH 0 0 0 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) TEMPERATURE (°C) 3405A1375 G07 3405A1375 G08 3405a1375f 3
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. (From Figure1a) Efficiency vs Input Voltage Efficiency vs Output Current Efficiency vs Output Current
90 100 100 Burst Mode OPERATION 90 90 80 80 80 IOUT = 0.1mA 70 70 IOUT = 1mA PULSE SKIPPING MODE 60 I 70 OUT = 10mA 60 IOUT = 100mA 50 IOUT = 250mA 60 40 EFFICIENCY (%) EFFICIENCY (%) 50 EFFICIENCY (%) 30 50 V 3.6V IN = 2.7V Burst Mode OPERATION 20 V 40 4.2V 40 IN = 3.6V V 3.6V IN = 4.2V 10 V 4.2V IN = 5.5V 30 30 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 3405A1375 G03 3405A1375 G01 3405A1375 G02
Oscillator Frequency vs Oscillator Frequency vs Temperature Supply Voltage Output Voltage vs Load Current
1.70 1.8 1.395 VIN = 3.6V 1.65 1.7 1.385 1.60 Burst Mode OPERATION 1.6 1.55 1.375 PULSE SKIPPING MODE 1.50 1.5 1.45 1.365 FREQUENCY (MHz) 1.4 OUTPUT VOLTAGE (V) 1.40 1.355 OSCILLATOR FREQUENCY (MHz) 1.3 1.35 1.30 1.2 1.345 –50 –25 0 25 50 75 100 125 2 3 4 5 6 0 100 200 300 400 500 TEMPERATURE (°C) SUPPLY VOLTAGE (V) CURRENT LOAD (mA) 3405A1375 G05 3405A1375 G04 3405A1375 G06
RDS(ON) vs Input Voltage RDS(ON) vs Temperature
1.2 1.2 1.1 VIN = 4.2V 1.0 1.0 VIN = 2.7V VIN = 3.6V 0.9 MAIN SWITCH 0.8 0.8 ) Ω 0.7 Ω ( 0.6 0.6 SYNCHRONOUS DS(0N) 0.5 DS(ON) R SWITCH R 0.4 0.4 0.3 0.2 0.2 SYNCHRONOUS SWITCH 0.1 MAIN SWITCH 0 0 0 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) TEMPERATURE (°C) 3405A1375 G07 3405A1375 G08 3405a1375f 3
