Regulator transient over-voltage protection

A voltage regulator comprising:

• a regulator transistor configured to receive a supply voltage and provide a regulated output voltage;
• a regulator controller configured to control the regulator transistor;
• a protection circuit configured to detect a transient voltage within the supply voltage and to maintain the regulator transistor in an off-state during the voltage transient,
• wherein the protection circuit includes:
• a first transistor;
• and
• a resistor-capacitor (RC) network;
• wherein the first transistor is configured to detect a voltage transient using the RC network and to maintain the regulator transistor on an off-state to protect components coupled to the second transistor from the voltage transient;
• wherein the first transistor includes a control node and is configured to receive the supply voltage at the control node through the RC network;
• wherein the control node of the first transistor is coupled directly to a capacitor of the RC network;
• wherein the first transistor includes first and second switch nodes, the first switch node configured to couple to the supply voltage, and the second switch node configured to couple to a control node of the regulator transistor;
• wherein the regulator transistor is configured to receive the supply voltage through the first transistor when the first transistor detects the voltage transient using the RC network;
• wherein the voltage transient includes a supply voltage increase above a loop bandwidth of the voltage regulator.