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LTC1645IS Datasheet(PDF) 3 Page - Linear Technology |
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LTC1645IS Datasheet(HTML) 3 Page - Linear Technology |
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3 / 24 page  3 LTC1645 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VTM TIMER Pin Voltage Threshold q 1.212 1.230 1.248 V ∆VTM TIMER Pin Threshold Line Regulation VCC1 = 2.375V to 12V q 19 mV ITM TIMER Pin Current Timer On, VTIMER = 0.6V, VCC1 = 5V q – 2.3 – 2 – 1.7 µA Timer Off, VTIMER = 1.5V 12 mA VCB1 Circuit Breaker Trip Voltage 1 VCB1 = (VCC1 – VSENSE1) q 46 50 56 mV VCB2 Circuit Breaker Trip Voltage 2 VCB2 = (VCC2 – VSENSE2) q 46 50 56 mV tCBDn Circuit Breaker Trip Delay VCBn = (VCCn – VSENSEn) > 60mV 1.5 µs ICP GATE n Pin Output Current ON = 2.2V, VGATEn = VCCn, VCC1 = 5V, VCC2 = 3.3V q – 12.5 – 10 – 7.5 µA ON = 0.7V, VGATEn = VCCn, VCC1 = 5V, VCC2 = 3.3V q 30 40 50 µA ON = 0.3V, VGATEn = VCCn, VCC1 = 5V, VCC2 = 3.3V 12 mA ∆VGATEn External N-Channel Gate Drive ∆VGATEn = (VGATEn – VCCn) q 4.5 16 V VONFPD ON Pin Fast Pull-Down Threshold Low to High q 0.375 0.4 0.425 V High to Low, Fast Pull-Down Engaged q 0.35 0.375 0.4 V VON1 ON Pin Threshold #1 Low to High, GATE1 Turns On q 0.8 0.825 0.85 V High to Low, GATE1 Turns Off q 0.775 0.8 0.825 V VON2 ON Pin Threshold #2 Low to High, GATE2 Turns On q 2 2.025 2.050 V High to Low, GATE2 Turns Off q 1.975 2 2.025 V VONHYST ON Pin Hysteresis 25 mV ION ON Pin Input Current VCC1 = 5V, VCC2 = 3.3V q ±0.01 ±2 µA VOL Output Low Voltage RESET, FAULT, COMPOUT, IOUT = 1.6mA, VCC1 = 5V q 0.16 0.4 V Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to ground unless otherwise specified. The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. 2.375V ≤ VCC1 ≤ 12V, 1.2V ≤ VCC2 ≤ 12V unless otherwise noted (Note 2). Note 3: An internal zener on the GATE n pins clamps the charge pump voltage to a typical maximum operating voltage of 22V. External overdrive of a GATE pin (for example, from capacitive coupling of VCCn glitches) beyond the internal zener voltage may damage the device. If a lower GATE n pin clamp voltage is desired, use an external zener diode. VCC1 Supply Current vs Voltage VCC2 Supply Current vs Voltage VCC1 (V) 0 1.0 2.0 3.0 0.5 1.5 2.5 46 8 10 1645 G01 12 3 25 7 9 11 TA = 25°C VCC2 = 1.5V VCC2 = 12V VCC2 (V) 0 0.5 1.5 2.0 2.5 3.5 1 5 7 1645 G02 1.0 3.0 4 9 10 11 12 2 3 68 TA = 25°C VCC1 = 2.375V VCC1 = 12V Supply Current vs Temperature TEMPERATURE ( °C) –40 0.8 1.0 1.4 20 60 1645 G03 0.6 0.4 –20 0 40 80 100 0.2 0 1.2 VCC1 = 5V VCC2 = 3.3V ICC1 ICC2 ELECTRICAL CHARACTERISTICS TYPICAL PERFOR A CE CHARACTERISTICS |
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Similar Description - LTC1645IS |
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