Datasheet LTC3407-4 (Analog Devices) - 4

LTC3407-4
TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency vs Oscillator Frequency Deviation Effi ciency vs Input Voltage Temperature vs Supply Voltage
100 2.5 10 VIN = 3.6V 95 8 LOAD = 100mA LOAD = 10mA 90 2.4 6 85 4 LOAD = 800mA 80 2.3 2 LOAD = 1mA 75 0 70 2.2 –2 EFFICIENCY (%) 65 FREQUENCY (MHz) –4 60 2.1 FREQUENCY DEVIATION (%) –6 55 VOUT = 1.8V –8 Burst Mode OPERATION 50 2.0 –10 2 3 4 5 6 –50 –25 0 25 50 75 100 125 2 3 4 5 6 INPUT VOLTAGE (V) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 34074 G04 34074 G05 34074 G06
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 ) Ω SWITCH Ω (m 350 (m 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) VIN (V) TEMPERATURE (°C) 34074 G07 34074 G08 34074 G09
Effi ciency vs Load Current Effi ciency vs Load Current Load Regulation
100 100 4 VIN = 2.7V VIN = 3.6V 95 3 Burst Mode 90 90 2 V OPERATION IN = 4.2V Burst Mode 85 1 OPERATION 80 80 0 PULSE-SKIPPING PULSE-SKIPPING ERROR (%) 75 –1 MODE EFFICIENCY (%) EFFICIENCY (%) MODE OUTV 70 70 –2 VOUT = 2.5V 65 Burst Mode OPERATION –3 V V IN = 3.6V, VOUT = 1.8V IN = 3.6V, VOUT = 1.8V NO LOAD ON OTHER CHANNEL NO LOAD ON OTHER CHANNEL NO LOAD ON OTHER CHANNEL 60 60 –4 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) LTC1273/75/76 • F25 34074 G12 34074 G11 34074fa 4