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LM2984 Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LM2984 Datasheet(HTML) 4 Page - National Semiconductor (TI) |
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4 / 16 page  Electrical Characteristics V IN = 14V, COUT = 10 µF, Cbuf = 10 µF, Cstby = 10 µF, unless otherwise indicated. Boldface type refers to limits over the en- tire operating temperature range, −40˚C ≤ T A ≤ +125˚C, all other limits are for TA = Tj = 25˚C (Note 8) . Parameter Conditions Typical Limit Units (Note 4) Tracking and Isolation Tracking I OUT ≤ 500 mA, Ibuf = 5 mA, ±30 ±100/±100 mV max V OUT–Vstby I stby ≤ 7.5 mA Tracking I OUT = 5 mA, Ibuf ≤ 100 mA, ±30 ±100/±100 mV max V buf–Vstby I stby ≤ 7.5 mA Tracking I OUT ≤ 500 mA, Ibuf ≤ 100 mA, ±30 ±100/±100 mV max V OUT–Vbuf I stby = 1mA Isolation (Note 1) R OUT = 1Ω,Ibuf ≤ 100 mA 5.00 4.50/4.50 V min V buf from VOUT 5.50/5.50 V max Isolation (Note 1) R OUT = 1Ω,Istby ≤ 7.5 mA 5.00 4.50/4.50 V min V stby from VOUT 5.50/5.50 V max Isolation (Note 1) R buf = 1Ω,IOUT ≤ 500 mA 5.00 4.50/4.50 V min V OUT from Vbuf 5.50/5.50 V max Isolation (Note 1) R buf = 1Ω,Istby ≤ 7.5 mA 5.00 4.50/4.50 V min V stby from Vbuf 5.50/5.50 V max Note 1: Isolation refers to the ability of the specified output to remain within the tested limits when the other output is shorted to ground. Electrical Characteristics V IN = 14V, IOUT = 5 mA, Ibuf = 5 mA, Istby = 5 mA, Rt = 130 kΩ,Ct = 0.33 µF, Cmon = 0.47 µF, unless otherwise indicated, Boldface type refers to limits over the entire operating temperature range, −40˚C ≤ T A ≤ +125˚C, all other limits are for TA = TJ = 25˚C (Note 8) Parameter Conditions Typical Limit Units (Note 4) Computer Monitor/Reset Functions I reset Low V IN = 4V, Vrst = 0.4V 5 2/0.50 mA min V reset Low V IN = 4V, Irst = 1 mA 0.10 0.40/0.40 V max R t voltage (Pin 2) 1.22 1.15/0.75 V min 1.22 1.30/2.00 V max Power On Reset VµP mon = 5V 50 45/17.0 ms min Delay (T dly = 1.2 Rt Ct) 50 55/80.0 ms max ∆V OUT Low (Note 6) −350 −225/−175 mV min Reset Threshold −500/−550 mV max ∆V OUT High (Note 6) 600 225/175 mV min Reset Threshold 750/800 mV max Reset Output VµP mon = 5V, Vrst = 12V 0.01 1/5.0 µA max Leakage µP mon Input Current (Pin 4) VµP mon = 2.4V 7.5 25/25 µA max VµP mon = 0.4V 0.01 10/15 µA max µP mon Input 1.22 0.80/0.80 V min Threshold Voltage 1.22 2.00/2.00 V max µP Monitor Reset VµP mon = 0V 50 45/30 ms min Oscillator Period (T window = 0.82 RtCmon) 50 55/70 ms max µP Monitor Reset VµP mon = 0V 1.0 0.7/0.4 ms min Oscillator Pulse Width (RESET pw = 2000 Cmon) 1.0 1.3/2.10 ms max Minimum µP Monitor (Note 7) 2 µs Input Pulse Width Reset Fall Time R rst = 10k, Vrst = 5V, Crst ≤ 10 pF 0.20 1.00/1.00 µs max www.national.com 4 |
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