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LT1107CS8 датащи(PDF) 3 Page - Linear Technology |
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LT1107CS8 датащи(HTML) 3 Page - Linear Technology |
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3 / 16 page ![]() 3 LT1107 1107fa LT1107C SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current Switch OFF q 450 µA fOSC Oscillator Frequency q 50 63 88 kHz DC Duty Cycle Step-Up Mode q 62 69 78 % Step-Down Mode, VIN = 12V q 50 60 70 % tON Switch ON Time Step-Up Mode q 8 11 13.5 µs Step-Down Mode, VIN = 12V q 6 9 12.0 µs Reference Line Regulation 2V ≤ VIN ≤ 5V q 0.2 0.7 %/V VSAT Switch Saturation Voltage, Step-Up Mode VIN = 3V, ISW = 650mA q 0.5 0.65 V Switch Saturation Voltage, Step-Down Mode VIN = 12V, ISW = 650mA q 1.1 1.5 V ELECTRICAL C C HARA TERISTICS The q denotes the specifications which apply over the full operating temperature range, VIN = 3V, – 55°C ≤ TA ≤ 125°C, unless otherwise noted. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: This specification guarantees that both the high and low trip points of the comparator fall within the 1.2V to 1.3V range. Note 3: The output voltage waveform will exhibit a sawtooth shape due to the comparator hysteresis. The output voltage on the fixed-output versions will always be within the specified range. Note 4: 100k resistor connected between a 5V source and the AO pin. The q denotes the specifications which apply over the full operating temperature range, VIN = 3V, military or commercial version, TA = 25°C, unless otherwise noted. The q denotes the specifications which apply over the full operating temperature range, VIN = 3V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Feedback Pin Bias Current LT1107, VFB = 0V q 70 120 nA Set Pin Bias Current VSET = VREF q 70 300 nA VOL Gain Block Output Low ISINK = 300µA, VSET = 1V q 0.15 0.4 V Reference Line Regulation 5V ≤ VIN ≤ 30V q 0.02 0.075 %/V AV Gain Block Gain RL = 100k (Note 4) q 1000 6000 V/V Current Limit 220 Ω to ILIM to VIN 400 mA Current Limit Temperature Coefficient q – 0.3 %/ °C Switch OFF Leakage Current Measured at SW1 Pin, VSW1 = 12V 1 10 µA VSW2 Maximum Excursion Below GND ISW1 ≤ 10µA, Switch OFF – 400 – 350 mV LT1107M SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current Switch OFF q 500 µA fOSC Oscillator Frequency q 40 63 95 kHz DC Duty Cycle Step-Up Mode q 56 69 81 % Step-Down Mode, VIN = 12V q 45 60 73 % tON Switch ON Time Step-Up Mode q 711 15 µs Step-Down Mode, VIN = 12V q 59 13 µs Reference Line Regulation 2V ≤ VIN ≤ 5V, 0°C ≤ TA ≤ 125°C 0.2 0.4 %/V 2.4V ≤ VIN ≤ 5V, TA = –55°C 0.8 %/V VSAT Switch Saturation Voltage, Step-Up Mode 0 °C ≤ TA ≤ 125°C, ISW = 500mA 0.5 0.65 V TA = – 55°C, ISW = 400mA 0.5 0.65 V Switch Saturation Voltage, Step-Down Mode VIN = 12V, ISW = 500mA 0 °C ≤ TA ≤ 125°C 1.5 V TA = – 55°C 2.0 V |
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