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EC95808CXXC7IR Datasheet(PDF) 9 Page - E-CMOS Corporation |
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EC95808CXXC7IR Datasheet(HTML) 9 Page - E-CMOS Corporation |
9 / 14 page EC95808 Ultra-Low Quiescent Current Voltage Detector E-CMOS Corp. (www.ecmos.com.tw) Page 9 of 14 4F17N Rev. F001 (5) When the VIN rises above the release voltage VREL, the N-ch MOS is OFF and P-ch MOS is ON to provide VIN at the output. Oscillation Notice When a resistor is connected between the input voltage and the input pin VIN with CMOS output configuration, oscillation may occur due to voltage drop at RIN. The voltage drop is VDROP = RIN x IOUT When the VIN input voltage rises above the release voltage, the detector output voltage increases and the load current IOUT will flow at RLOAD. A voltage drop is produced at RIN. The voltage drop will also lead to a fall in the input voltage at VIN pin. When the VIN input voltage falls below the detection voltage, output voltage falls to GND and the output current will cease. Then the voltage drop at RIN will disappear, and the VIN input voltage will rise to commence release operation. Oscillation may occur with this release detection-release repetition. It’s recommended not to use the CMOS configuration when a resistor RIN is connected between VIN input pin and the power source. Please use N-channel open drain configuration when RIN is required. |
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