Semiconductor device for monitoring a reverse voltage

A semiconductor device comprising:

• a first node having a first voltage level;
• a second node having a second voltage level;
• a near field communication coil connected to the second node and configured to generate data related to a near field communication;
• and
• a reverse voltage monitoring circuit configured to monitor a difference between the first voltage level and the second voltage level,
• wherein the reverse voltage monitoring circuit is further configured to block a reverse current in a case where the second voltage level is higher than the first voltage level.

A mobile device comprising:

• a power management integrated circuit configured to manage a source power voltage;
• a wireless charging circuit configured to control a level of a voltage received from a wireless charging coil;
• a regulator configured to regulate a voltage at an input node to generate a regulated voltage at an output node;
• a power amplifier configured to amplify a voltage which is outputted at the output node;
• and
• a reverse voltage monitoring circuit configured to monitor a voltage difference between the input node and the output node and generate a control signal based on the voltage difference.