US 12,308,831 B2
Power switch having cascoded transistors of a same condictivity type, each of the cascoded transistors having its source tied to its body
Robert Matthew Mertens, Crystal Lake, IL (US); and Christopher James Micielli, Clawson, MI (US)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on Nov. 15, 2022, as Appl. No. 18/055,679.
Prior Publication US 2024/0162899 A1, May 16, 2024
Int. Cl. H03K 17/10 (2006.01); H03K 17/567 (2006.01)
CPC H03K 17/102 (2013.01) [H03K 17/567 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power switch, comprising:
a first transistor of a first conductivity type having a first current electrode corresponding to an output of the power switch and a second current electrode tied to a body terminal of the first transistor;
a second transistor of the first conductivity type having a first current electrode coupled to the second current electrode of the first transistor and a second current electrode tied to a body terminal of the second transistor;
a third transistor of the first conductivity type having a first current electrode coupled to the second current electrode of the second transistor and a second current electrode tied to a body terminal of the third transistor and coupled to a first power supply voltage terminal configured to provide a first power supply voltage;
an analog switch configured to either couple the second current electrode of the second transistor or a first reference voltage to a control electrode of the second transistor based on a control signal; and
a voltage selector circuit configured to either couple the second current electrode of the first transistor or the first reference voltage to a control electrode of the first transistor.