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LTC1643L-1CGN Datasheet(PDF) 3 Page - Linear Technology |
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LTC1643L-1CGN Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page 3 LTC1643L/LTC1643L-1/LTC1643H DC ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS 3.3V and 5V Current Foldback Profile OUTPUT VOLTAGE (V) 0 11 10 9 8 7 6 5 4 3 2 1 0 4 1643 G01 1 2 3 5 RSENSE = 0.005Ω 3VOUT 5VOUT OUTPUT VOLTAGE (V) 0 1.0 0.5 0 –8 –10 1643 G03 –2 –4 –6 –12 OUTPUT VOLTAGE (V) 0 1.0 0.5 0 810 1643 G02 2 4 6 12 12V Current Foldback Profile – 12V Current Foldback Profile SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VTH Power-Good Threshold Voltage V3VOUT C Grade q 2.8 2.9 3.0 V I Grade q 2.75 2.9 3.0 V V5VOUT C Grade q 4.5 4.65 4.75 V I Grade q 4.4 4.65 4.75 V VIL Input Low Voltage ON/ON, FAULT q 0.8 V VIH Input High Voltage ON/ON, FAULT q 2V VOL Output Low Voltage FAULT, PWRGD, I = 3mA q 0.4 V IIN ON/ON Pin Input Current ON/ON = GND q ± 0.08 ±10 µA ON/ON= 12VIN q ± 0.08 ±10 µA 5VSENSE Input Current 5VSENSE = 5V q 50 100 µA 3VSENSE Input Current 3VSENSE = 3V q 50 100 µA 5VIN Input Current 5VIN = 5V q 460 700 µA 3VIN Input Current 3VIN = 3V q 320 600 µA 5VOUT Input Current 5VOUT = 5V, ON = 3V, ON = GND q 240 500 µA 3VOUT Input Current 3VOUT = 3.3V, ON = 3V, ON = GND q 220 500 µA RDIS 5VOUT Discharge Impedance ON = GND or ON = 3V 100 Ω 3VOUT Discharge Impedance ON = GND or ON = 3V 70 Ω 12VOUT Discharge Impedance ON = GND or ON = 3V 450 Ω VEEOUT Discharge Impedance ON = GND or ON = 3V 1600 Ω ITIMER TIMER Pin Current Timer On, VTIMER = GND q –15 – 22 – 27 µA Timer Off, VTIMER = 5V 45 mA VTIMER TIMER Threshold Voltage (V12VIN – VTIMER) q 0.5 0.9 1.3 V 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. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. V12VIN = 12V, VEE = – 12V, V3VIN = 3.3V, V5VIN = 5V.(Note 2) |
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