[AP4405AEN] 9. Functional Description9.1 Voltage Detection Function 1)Detection voltage(VIN) and supply voltage(VDD) both increase at a time. (POL = “L”) The OUT pin wil be in undefined status when VIN voltage is from VSS to VOPL which is the AP4405AEN minimum operating voltage(1.0V). The OUT pin outputs VSS when VIN voltage exceeds VOPL. When VIN voltage reaches to the detection voltage (VDETH), the OUT pin outputs VDD voltage. 2) Detection voltage(VIN) and supply voltage(VDD) both decrease at a time. (POL = “L”) When VIN voltage is higher than VDETH, the OUT pin outputs VDD. When VIN goes under the detection voltage (VDETL), the OUT pin outputs VSS. The OUT pin will be undefined status when VIN voltege becomes lower than VOPL. Figure 3. Voltage detection function, VIN = VDD, POL = “L” Table 1. Voltage Detection Table, POL=“L” VDD OUT Note ＜VDETH VSS Up phase ≧VDETH VDD ＞VDETL VDD Down phase ≦VDETL VSS
