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LTC694CN8 Datasheet(PDF) 3 Page - Linear Technology |
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LTC694CN8 Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page 3 LTC690/LTC691 LTC694/LTC695 ELECTRICAL C C HARA TERISTICS The q denotes specifications which apply over the operating temperature range, otherwise specifications are at TA = 25°C. VCC = full operating range, VBATT = 2.8V, unless otherwise noted. PARAMETER CONDITONS MIN TYP MAX UNITS Battery Back-Up Switching Operating Voltage Range VCC 4.75 5.50 V VBATT 2.00 4.25 V VOUT Output Voltage IOUT = 1mA VCC – 0.05 VCC – 0.005 V q VCC – 0.10 VCC – 0.005 V IOUT = 50mA VCC – 0.50 VCC – 0.250 V VOUT in Battery Back-Up Mode IOUT = 250µA, VCC < VBATT VBATT – 0.1 VBATT – 0.02 V Supply Current (Exclude IOUT)IOUT ≤ 50mA 0.6 1.5 mA q 0.6 2.5 mA Supply Current in Battery Back-Up Mode VCC = 0V, VBATT = 2.8V 0.04 1 µA q 0.04 5 µA Battery Standby Current (+ = Discharge, – = Charge) 5.5 > VCC > VBATT + 0.2V – 0.1 + 0.02 µA q –1.0 + 0.10 µA Battery Switchover Threshold, VCC – VBATT Power Up 70 mV Power Down 50 mV Battery Switchover Hysteresis 20 mV BATT ON Output Voltage (Note 4) ISINK = 3.2mA 0.4 V BATT ON Output Short-Circuit Current (Note 4) BATT ON = VOUT Sink Current 35 m BATT ON = 0V Source Current 0.5 1 25 µA Reset and Watchdog Timer Reset Voltage Threshold q 4.5 4.65 4.75 V LTC690M q 4.4 4.65 4.75 V Reset Threshold Hysteresis 40 mV Reset Active Time (LTC690/91) (Note 5) OSC SEL HIGH, VCC = 5V 40 50 60 ms q 35 50 70 ms Reset Active Time (LTC694/95) (Note 5) OSC SEL HIGH, VCC = 5V 160 200 240 ms q 140 200 280 ms Watchdog Time-Out Period, Internal Oscillator Long Period, VCC = 5V 1.2 1.6 2.00 sec q 1.0 1.6 2.25 sec Short Period, VCC = 5V 80 100 120 ms q 70 100 140 ms Watchdog Time-Out Period, External Clock (Note 6) Long Period 4032 4097 Clock Short Period 960 1025 Cycles Reset Active Time PSRR 1 ms/V Watchdog Time-Out Period PSRR, Internal OSC 1 ms/V Minimum WDI Input Pulse Width VIL = 0.4V, VIH = 3.5V q 200 ns RESET Output Voltage at VCC = 1V ISINK = 10µA, VCC = 1V 4 200 mV RESET and LOW LINE Output Voltage (Note 4) ISINK = 1.6mA, VCC = 4.25V 0.4 V ISOURCE = 1µA, VCC = 5V 3.5 V RESET and WDO Output Voltage (Note 4) ISINK = 1.6mA, VCC = 5V 0.4 V ISOURCE = 1µA, VCC = 4.25V 3.5 V |
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