US 12,136,870 B2
Buck converter having super-junction MOSFET
Akinobu Sawada, Kyoto (JP)
Assigned to ROHM CO., LTD., Kyoto (JP)
Filed by ROHM CO., LTD., Kyoto (JP)
Filed on Dec. 8, 2021, as Appl. No. 17/643,371.
Claims priority of application No. 2020-208250 (JP), filed on Dec. 16, 2020.
Prior Publication US 2022/0190725 A1, Jun. 16, 2022
Int. Cl. H02M 1/00 (2007.01); H02M 1/08 (2006.01); H02M 3/156 (2006.01)
CPC H02M 1/0054 (2021.05) [H02M 1/08 (2013.01); H02M 3/156 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A buck converter, comprising:
a MOSFET, including a first side connected to an application end of an input voltage;
a rectifying element, connected to a second side of the MOSFET by a first connection node;
a coil, having a first terminal connected to the first connection node;
a first capacitor, connected to a second terminal of the coil, wherein the MOSFET is a super-junction MOSFET;
a first resistor, having a first end portion directly connected to a gate of the MOSFET;
a second resistor, having a first end portion directly connected to a second end portion of the first resistor;
a first diode, having:
an anode, directly connected to the first end portion of the first resistor; and
a cathode, directly connected to the second end portion of the first resistor,
a second diode, having:
an anode, directly connected to the second terminal of the coil; and
a cathode directly connected to a second end portion of the second resistor; and
a second capacitor, having a first end directly connected to the cathode of the second diode and a second end directly connected to the first connection node.