POWER SUPPLY CIRCUIT AND INTEGRATED POWER MANAGEMENT CIRCUIT

Abstract

The invention relates to a technique and apparatus for controlling the active terminals of a transistor in a switched-mode power supply (SMPS). An example power supply typically consists of a switched-mode power supply with a switching transistor and a gate controller whose output is coupled to the active terminal of the switching transistor. The gate controller consists of a first switch coupled between the output of the gate controller and the first voltage line; a second switch coupled between the output of the gate controller and the voltage node of the gate controller; a third switch coupled between the voltage node of the gate controller and the second voltage line; and a voltage clamp coupled in series with a fourth switch, the voltage clamp and the fourth switch coupled between the third voltage line and the voltage node (or output of the gate controller). The invention also relates to a power management integrated circuit.