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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC4244IGN датащи(PDF) 3 Page - Linear Technology |
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LTC4244IGN датащи(HTML) 3 Page - Linear Technology |
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3 / 28 page  3 LTC4244/LTC4244-1 42441f SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ICL Current Foldback 12VIN = 12V, 12VOUT = 0V, TIMER = 0V q –100 –360 –1000 mA 12VIN = 12V, 12VOUT = 10V, TIMER = 0V q –550 –850 –1500 mA VEEIN = –12V, VEEOUT = 0V, TIMER = 0V q 50 225 350 mA VEEIN = –12V, VEEOUT = –10V, TIMER = 0V q 350 610 870 mA TTS Thermal Shutdown Temperature Junction Temperature, Ramping Up 150 °C VTH Power Good Threshold Voltage 12VOUT, Ramping Down q 10.8 11.1 11.4 V 5VOUT, Ramping Down q 4.50 4.61 4.75 V 3.3VOUT, Ramping Down q 2.80 2.90 3.00 V VEEOUT, Ramping Up, LTC4244 Only q –10.8 –11.1 –11.4 V VIL Logic Input Low Voltage OFF/ON, RESETIN, FAULT q 0.8 V VIH Logic Input High Voltage OFF/ON, RESETIN, FAULT q 2V IIN OFF/ON, RESETIN Input Current OFF/ON, RESETIN = 0V q ±10 µA OFF/ON, RESETIN = 12V q ±10 µA RESETOUT, FAULT Leakage RESETOUT, FAULT = 5V, OFF/ON = 0V, RESETIN = 3.3V q ±10 µA Current PWRGD Output Current PWRGD = 5V, OFF/ON = 4V q ±10 µA 5VSENSE Input Current 5VSENSE = 5V, 5VOUT = 0V q 57 100 µA 3.3VSENSE Input Current 3.3VSENSE = 3.3V, 3.3VOUT = 0V q 56 100 µA 5VIN Input Current 5VIN = 5V, TIMER = 0V q 0.8 1.5 mA 3.3VIN Input Current 3.3VIN = 3.3V, TIMER = FLOAT q 510 700 µA 3.3VIN = 3.3V, TIMER = 0V q 400 550 µA 5VOUT Input Current 5VOUT = 5V, OFF/ON = 0V, TIMER = 0V q 107 200 µA 3.3VOUT Input Current 3.3VOUT = 3.3V, OFF/ON = 0V, TIMER = 0V q 170 300 µA PRECHARGE Input Current VPRECHARGE = 1V q 0.1 10 µA ITIMER TIMER Pin Current OFF/ON = 0V, VTIMER = 0V q 16 21 26 µA OFF/ON = 5V, VTIMER = 5V q 25 45 70 mA VTIMER TIMER Threshold Voltage TIMER_HI, (V12VIN – VTIMER), FAULT = 0V, Ramping Up q 1.3 1.6 1.9 V TIMER_LO, VTIMER, Ramping Down q 0.5 0.8 1.1 V ∆VTIMER External Timer Voltage ∆VTIMER = (V12VIN – VTIMER), ITIMER = –1µA q 1V RDIS 12VOUT Discharge Resistance OFF/ON = 4V q 440 1000 Ω 5VOUT Discharge Resistance OFF/ON = 4V q 200 500 Ω 3.3VOUT Discharge Resistance OFF/ON = 4V q 200 500 Ω VEEOUT Discharge Resistance OFF/ON = 4V q 390 1000 Ω VOL Output Low Voltage PWRGD, RESETOUT, FAULT, I = 1mA q 0.4 V VPXG PRECHARGE Reference Voltage VDRIVE = 2V q 0.95 1 1.05 V ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V12VIN = 12V, VEEIN = –12V, V3.3VIN = 3.3V, V5VIN = 5V, 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. Note 3: The 12VIN and VEEIN pins will withstand transient surges up to ±15V, respectively, upon hot insertion. |
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