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LTC1646 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1646 Datasheet(HTML) 3 Page - Linear Technology |
3 / 20 page LTC1646 3 1646fa SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIH Input High Voltage OFF/ON, RESETIN, FAULT ● 2V VTIMER TIMER Threshold Voltage VTIMER , FAULT = 0V ● 1.15 1.25 1.35 V IIN OFF/ON Input Current OFF/ON = 5V ● ±0.08 ±10 µA OFF/ON = 0V ● ±0.08 ±10 µA RESETIN Input Current RESETIN = 5V ● ±0.08 ±10 µA RESETIN = 0V ● ±0.08 ±10 µA 5VSENSE Input Current 5VSENSE = 5V, 5VOUT = 0V ● 66 100 µA 3VSENSE Input Current 3VSENSE = 3.3V, 3VOUT = 0V ● 66 100 µA 3VIN Input Current 3VIN = 3.3V ● 460 1000 µA 5VOUT Input Current 5VOUT = 5V, OFF/ON = 0V ● 0.9 1.5 mA 3VOUT Input Current 3VOUT = 3.3V, OFF/ON = 0V ● 0.9 1.5 mA ITIMER TIMER Pin Current OFF/ON = 0V, VTIMER = 0V ● –7 –5 –3 µA OFF/ON = 5V, VTIMER = 5V 6.6 mA RDIS 5VOUT Discharge Impedance OFF/ON = 5V ● 120 220 Ω 3VOUT Discharge Impedance OFF/ON = 5V ● 120 220 Ω VOL Output Low Voltage FAULT, PWRGD, RESETOUT, I = 2mA ● 0.25 0.4 V VPXG PRECHARGE Reference Voltage VPRECHARGE, V5VIN = 5V and 3.3V ● 0.90 1.00 1.10 V ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V5VIN = 5V and V3VIN = 3.3V unless otherwise noted. 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. TYPICAL PERFOR A CE CHARACTERISTICS 5V Current Foldback Profile 3.3V Current Foldback Profile OUTPUT VOLTAGE (V) 0 2 4 5 1646 G01 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RSENSE = 0.007Ω 1646 G02 12 11 10 9 8 7 6 5 4 3 2 1 0 OUTPUT VOLTAGE (V) 0 2 4 5 13 RSENSE = 0.005Ω –50 –25 0 25 50 75 100 TEMPERATURE ( °C) 1646 G03 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 5VIN Supply Current vs Temperature |
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