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LTC3549 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3549 Datasheet(HTML) 5 Page - Linear Technology |
5 / 16 page LTC3549 5 3549f INPUT VOLTAGE (V) 1.5 0.5 1.0 1.5 5.5 3549 G08 0 –0.5 –1.5 2.5 3.5 4.5 –1.0 2.5 2.0 2.05 2.15 2.25 2.35 2.10 2.20 2.30 TEMPERATURE ( °C) –50 –25 0 25 50 3549 G07 75 100 125 VIN = 2.7V VIN = 1.6V VIN = 4.2V LOAD CURRENT (mA) 0 1.203 1.204 300 3549 G09 1.202 1.201 1.199 100 200 1.200 1.205 VOUT PULSE SKIP BURST Oscillator Frequency vs Temperature Oscillator Frequency Shift vs Input Voltage Output Voltage vs Load Current VIN = 1.6V, VOUT = 1.2V RDS(ON) vs Input Voltage RDS(ON) vs Temperature Dynamic Input Current VOUT = 1.5V, 247k Ω Load Dynamic Supply Current vs Temperature, VIN = 3.6V, VOUT = 1.5V, No Load Switch Leakage vs Temperature VIN = 5.5V Switch Leakage vs Input Voltage TYPICAL PERFOR A CE CHARACTERISTICS (From Typical Application on the front page, except for the resistive divider resistor values) INPUT VOLTAGE (V) 1.5 0.4 0.5 0.6 5.5 3549 G10 0.3 0.2 0 2.5 3.5 4.5 0.1 0.9 0.8 0.7 MAIN SWITCH SYNCHRONOUS SWITCH TEMPERATURE ( °C) –50 –25 0 25 50 3549 G11 75 100 125 0.15 0.25 0.35 0.45 0.65 0.85 0.95 0.75 0.55 VIN = 1.6V VIN = 2.7V VIN = 4.2V VIN = 1.6V VIN = 2.7V VIN = 4.2V MAIN SWITCH SYNCHRONOUS SWITCH TEMPERATURE ( °C) –50 –25 0 25 50 3549 G13 75 100 125 50 0 150 250 350 100 200 300 PULSE SKIP BURST SYNCHRONOUS SWITCH TEMPERATURE ( °C) –50 –25 0 25 50 3549 G14 75 100 125 50 0 150 250 100 200 MAIN SWITCH INPUT VOLTAGE (V) 0 0.8 1.0 1.2 3549 G15 0.6 0.4 0 2 4 6 0.2 1.6 1.4 MAIN SWITCH SYNCHRONOUS SWITCH INPUT VOLTAGE (V) 2.0 3.0 10000 70 60 50 40 30 20 10 0 3549 G12 100 1000 2.5 6.0 5.5 5.0 4.5 4.0 3.5 1.5 Burst Mode OPERATION PULSE SKIP MODE |
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