ACE301_1 Datasheet, PDF (8/19 Pages) ACE Technology Co., LTD. – High-precision Low Voltage Detector

Technology
Function description
ACE301
High-precision Low Voltage Detector
High precision low temperature co-efficiency reference voltage is applied to the negative input of a
comparator. Input voltage, divided by resistor array of Ra Rb and Rc, is applied to the positive input of the
comparator. Output of the comparator controls a pair of NMOS and PMOS switches, generating the
hysteresis. Output of the comparator passes a series of buffer to drive the output CMOS pair.
+V_DET, -V_DET, V_HYS can be calculated as follows:
-V_DET =V_REF*(1+Ra/(Rb+Rc))
+V_DET =V_REF*(1+(Ra+Rb)/Rb)=V_REF *(1+(Ra+Rc)/Rb)
V_HYS = +V_DET-(-V_DET)=V_REF*(Ra+Rb+Rc)(1/Rb-1/(Rb+Rc))
VER 1.4 8