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LTC1709EG-9 Datasheet(PDF) 7 Page - Linear Technology |
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LTC1709EG-9 Datasheet(HTML) 7 Page - Linear Technology |
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7 / 28 page  7 LTC1709-8/LTC1709-9 TYPICAL PERFOR A CE CHARACTERISTICS Current Sense Pin Input Current vs Temperature EXTVCC Switch Resistance vs Temperature Oscillator Frequency vs Temperature TEMPERATURE ( °C) –50 –25 25 29 35 0 50 75 170989 G20 27 33 31 25 100 125 VOUT = 5V TEMPERATURE ( °C) –50 –25 0 4 10 0 50 75 170989 G21 2 8 6 25 100 125 TEMPERATURE ( °C) –50 200 250 350 25 75 170989 G22 150 100 –25 0 50 100 125 50 0 300 VFREQSET = 5V VFREQSET = OPEN VFREQSET = 0V Undervoltage Lockout vs Temperature TEMPERATURE ( °C) –50 3.40 3.45 3.50 25 75 170989 G23 3.35 3.30 –25 0 50 100 125 3.25 3.20 Shutdown Latch Thresholds vs Temperature TEMPERATURE ( °C) –50 –25 0 0.5 1.5 2.0 2.5 75 100 50 4.5 170989 G24 1.0 0 25 125 3.0 3.5 4.0 LATCH ARMING LATCHOFF THRESHOLD RUN/SS (Pin 1): Combination of Soft-Start, Run Control Input and Short-Circuit Detection Timer. A capacitor to ground at this pin sets the ramp time to full current output. Forcing this pin below 0.8V causes the IC to shut down all internal circuitry. All functions are disabled in shutdown. SENSE1+, SENSE2+ (Pins 2,14): The (+) Input to Each Differential Current Comparator. The ITH pin voltage and built-in offsets between SENSE– and SENSE+ pins in conjunction with RSENSE set the current trip threshold. PI FU CTIO S SENSE1–, SENSE2– (Pins 3, 13): The (–) Input to the Differential Current Comparators. EAIN (Pin 4): Input to the error amplifier that compares the feedback voltage to the internal 0.8V reference voltage. This pin is normally connected to a resistive divider from the output of the differential amplifier (DIFFOUT). PLLFLTR (Pin 5): The phase-locked loop’s lowpass filter is tied to this pin. Alternatively, this pin can be driven with an AC or DC voltage source to vary the frequency of the internal oscillator. |
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Similar Description - LTC1709EG-9 |
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