Boot-strap regulator for gate driver

An apparatus, comprising:

• high-side and low-side gate drivers configured to control a voltage at a first node;
• a low-side regulator configured to generate a first power supply voltage usable by the low-side gate driver;
• and
• a high-side regulator coupled to the low-side regulator, wherein the high-side regulator is configured to generate a second power supply voltage usable by the high-side driver based on the first power supply voltage.

A method, comprising:

• a circuit generating a first power supply voltage for a first driver coupled to a gate of a first transistor;
• the circuit generating a second power supply voltage for a second driver coupled to a gate of a second transistor, wherein the second power supply voltage is generated based on the first power supply voltage such that generating the second power supply voltage includes:
• the circuit comparing the first power supply voltage with the second power supply voltage;
• and
• the circuit adjusting the second power supply voltage based on the comparing;
• and
• the circuit using the first and second transistors to control a voltage at an output node.