US 12,267,013 B2
Series stacked phase DC-DC converters with stable operation
Richard Nicholson, Aptos, CA (US); and Xiaogang Feng, Fremont, CA (US)
Assigned to Empower Semiconductor, Inc., San Jose, CA (US)
Filed by Empower Semiconductor, Inc., Milpitas, CA (US)
Filed on Aug. 19, 2022, as Appl. No. 17/820,986.
Claims priority of provisional application 63/236,116, filed on Aug. 23, 2021.
Prior Publication US 2023/0057337 A1, Feb. 23, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/007 (2021.05); H02M 1/0095 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A circuit comprising:
a first top buck converter circuit coupled to a second top buck converter circuit at a first connection node and a second connection node; and
a bottom buck converter circuit coupled to the first top buck converter circuit and to the second top buck converter circuit at the second connection node;
a power input terminal coupled to the first and second top buck converter circuits, wherein the power input terminal is not directly connected to the first connection node; and
a power output terminal coupled to the bottom buck converter circuit and to the first connection node, wherein the power output terminal is coupled to the first connection node through only a first inductor.