Free wheeling buck regulator with floating body zone switch
AssigneeInfineon Technologies AG
InventorJenoe Tihanyi
Life of this patent
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Abstract
A voltage transformer includes a pair of input terminals for applying an input voltage, a series circuit connected in parallel to the pair of input terminals of a first switch, and a low pass filter. The low pass filter has output terminals for connecting a load. A freewheeling circuit is connected in parallel to the low pass filter. The freewheeling circuit has a second switch, which is configured as a MOS transistor, with a gate terminal and a load path formed between a first load path terminal and a second load path terminal. The MOS transistor has a body zone mounted in a floated manner or connected to a source zone by an ohmic resistor.
Claims15
A voltage converter, comprising:
- a pair of input terminals for receiving an input voltage;
- a series circuit connected between said pair of input terminals and having:
- a first switch;
- and
- a low-pass filter having output terminals to be connected to a load;
- a freewheeling circuit connected in parallel with said low-pass filter, said freewheeling circuit having a second switch, said second switch having:
- a first load path terminal;
- a second load path terminal;
- a load path formed between said second load path terminal and said first load path terminal;
- and
- a control terminal;
- and
- said second switch being a MOS transistor having one of:
- a floating body zone;
- and
- a source zone, a non-reactive resistor, and a body zone connected to said source zone through said non-reactive resistor.
Dependencies are inferred from the claim text.