Tool/software:
A TLV9051QDBVRQ1 operational amplifier is used to amplify the 0.75V power output from the LDO to 0.8V, and then output a comparator to determine whether there is overvoltage or undervoltage. The operational amplifier and LDO circuit are as follows.
Our ECU test found that during cold start at -40 ° C, the output voltage of VMON2 is a positive cosine wave. As shown in the following figure.
Pink represents the LDO output, which is the IN+of the operational amplifier, while cyan represents the operational amplifier output.
Can you help me identify any issues with the schematic design and provide any optimization suggestions.
