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LTC3727 Datasheet(PDF) 6 Page - Linear Technology |
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LTC3727 Datasheet(HTML) 6 Page - Linear Technology |
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6 LTC3727/LTC3727-1 3727f Soft-Start Up (Figure 13) IOUT 5A/DIV VOUT 5V/DIV VRUN/SS 5V/DIV VIN = 20V 50ms/DIV 3727 G16 VOUT = 12V Load Step (Figure 13) VOUT 200mV/DIV IOUT 2A/DIV VIN = 15V 50 µs/DIV 3727 G17 VOUT = 12V LOAD STEP = 0A TO 3A Burst Mode OPERATION Load Step (Figure 13) VOUT 200mV/DIV IOUT 2A/DIV VIN = 15V 50 µs/DIV 3727 G18 VOUT = 12V LOAD STEP = 0A TO 3A CONTINUOUS MODE Input Source/Capacitor Instantaneous Current (Figure 13) VSW1 20V/DIV VIN = 15V 1 µs/DIV 3727 G19 VOUT1 = 12V VOUT2 = 5V IOUT1 = IOUT2 = 2A Burst Mode Operation (Figure 13) VOUT 20mV/DIV IOUT 0.5A/DIV VIN = 15V 50 µs/DIV 3727 G20 VOUT = 12V VFCB = OPEN IOUT = 20mA Constant Frequency (Burst Inhibit) Operation (Figure 13) VOUT 20mV/DIV IOUT 0.5A/DIV VIN = 15V 5 µs/DIV 3727 G21 VOUT = 12V VFCB = 7.5V IOUT = 20mA VSW2 20V/DIV TYPICAL PERFOR A CE CHARACTERISTICS IIN 1A/DIV SENSE Pins Total Source Current VSENSE COMMON MODE VOLTAGE (V) 0 –400 –300 –250 –200 –150 –100 –50 5 10 3727 G13 0 50 100 –350 15 Dropout Voltage vs Output Current (Figure 13) RUN/SS Current vs Temperature OUTPUT CURRENT (A) 0 1.0 1.2 1.4 4 3727 G14 0.8 0.6 123 5 0.4 0.2 0 VOUT = 5V RSENSE = 0.015Ω RSENSE = 0.010Ω TEMPERATURE ( °C) –50 –25 0 0.2 0.6 0.8 1.0 75 100 50 1.8 3727 G15 0.4 0 25 125 1.2 1.4 1.6 |
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