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LTC693I Datasheet(PDF) 3 Page - Linear Technology |
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LTC693I Datasheet(HTML) 3 Page - Linear Technology |
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3 / 16 page  3 LTC692/LTC693 ELECTRICAL C C HARA TERISTICS VCC = Full Operating Range, VBATT = 2.8V, TA = 25°C, unless otherwise noted. PARAMETER CONDITONS MIN TYP MAX UNITS Battery Backup Switching Operating Voltage Range VCC 4.50 5.50 V VBATT 2.00 4.00 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 Backup 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 Backup Mode VCC = 0V, VBATT = 2.8V 0.04 1 µA q 0.04 5 µA Battery Standby Current 5.5 > VCC > VBATT + 0.2V – 0.1 0.02 µA (+ = Discharge, – = Charge) q – 1.0 0.10 µA Battery Switchover Threshold Power Up 70 mV VCC – VBATT 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 mA BATT ON = 0V Source Current 0.5 1 25 µA Reset and Watchdog Timer Reset Voltage Threshold q 4.25 4.40 4.50 V Reset Threshold Hysteresis 40 mV Reset Active Time OSC SEL HIGH, VCC = 5V 160 200 240 ms (Note 5) q 140 200 280 ms Watchdog Time-Out Period, Long Period, VCC = 5V 1.2 1.6 2.00 sec Internal Oscillator 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 Long Period 4032 4097 Clock (Note 6) 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 ISINK = 1.6mA, VCC = 4.25V 0.4 V (Note 4) ISOURCE = 1µA, VCC = 5V 3.5 V RESET and WDO Output Voltage ISINK = 1.6mA, VCC = 5V 0.4 V (Note 4) ISOURCE = 1µA, VCC = 4.25V 3.5 V |
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