Patent ID: 9722483
Date: 2017-08-01
CPC Classifications: H02M,Y02B

Claim:
1. A voltage regulator having an input terminal and a ground terminal, the voltage regulator comprising: a high-side device coupled between the input terminal and an intermediate terminal, the high-side device including first and second transistors each coupled between the input terminal and the intermediate terminal, such that the first and second transistors are electrically coupled in parallel and the first transistor controls a drain-source switching voltage of the second transistor, a drain junction of the first transistor having a doping profile that results in the first transistor having a higher breakdown voltage than the second transistor; a low-side device coupled between the intermediate terminal and the ground terminal, the low side device including third and fourth transistors each coupled between the intermediate terminal and the ground terminal, such that the third and fourth transistors are electrically coupled in parallel and the third transistor controls a drain-source switching voltage of the fourth transistor; a first inverter configured to drive a gate of the third transistor; a second inverter configured to drive a gate of the fourth transistor; and a controller that drives the high-side and low-side devices to alternately couple the intermediate terminal to the input terminal and the ground terminal; wherein: