Texas Instruments Corporation

Wei Da

Stephen Isaac Brink

Henry Litzmann Edwards

Joseph Maurice Khayat

A switching regulator includes a low-side switching transistor, a snubber transistor, a first pull-down transistor, and a second pull-down transistor. The low-side switching transistor includes a first current terminal and a second current terminal. The first current terminal is coupled to a switching node. The second current terminal is coupled to a ground terminal. The snubber transistor includes a first current terminal, a second current terminal, and a control terminal. The first current terminal is coupled to the switching node. The second current terminal is coupled to the ground terminal. The first pull-down transistor is coupled between the control terminal of the snubber transistor and the ground terminal. The second pull-down transistor is coupled between the control terminal of the snubber transistor and the ground terminal.

Switching regulator with configurable snubber

In an example, a method includes providing a signal to a driver for a switching voltage regulator to turn off a high-side field effect transistor (FET) of the switching voltage regulator. The method also includes reducing a voltage at a source of the high-side FET. The method includes responsive to the signal, turning off a pull-down FET coupled to a gate of the high-side FET. The method also includes commutating current from the high-side FET to a low-side FET.

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