of the MOSFETs M1, M2 and to the supply voltage for voltage supply purposes. So that the required drive potential for the first MOSFET M1, which functions as a high-side switch, can be made available in the drive circuit 100, a bootstrap circuit with a capacitor C2 and a diode D1 is provided, which is likewise connected to the drive circuit 100. The drive potential required for the first MOSFET M1 is higher than the supply voltage U1.
The known half-bridge circuit shown in FIG. 1 is part of a switching regulator, a so-called buck converter in the example illustrated, which provides a smaller output voltage U2 from the supply voltage U1. In this case, a series circuit including a coil L1 and a capacitor C1 is connected inload change at the output of the switching regulator within a time period of less than 100 ns. That requires clock frequencies of 2 MHz or more for the switches.
In this case, the line connections between the components and the half-bridge should be as short as possible. Furthermore, the two transistors should be accommodated in one housing, as much as possible, to save space.
In the case of the known half-bridge circuit, a comparatively high outlay is required to accommodate the two transistors and possibly also the drive circuit. Vertically designed transistors are usually used as the power transistors in switching regulators. Such transistors are usually applied to a printed circuit board by their rear side, which forms the drain connection of the transistor. In the case of the