US 12,170,481 B2
DC-DC voltage control mode with seamless PFM and load-line operation
Hassan Ihs, Encinitas, CA (US)
Assigned to Endura IP Holdings Ltd., George Town (KY)
Filed by Endura IP Holdings Ltd., George Town (KY)
Filed on Jan. 28, 2022, as Appl. No. 17/649,293.
Claims priority of provisional application 63/143,205, filed on Jan. 29, 2021.
Prior Publication US 2022/0247312 A1, Aug. 4, 2022
Int. Cl. H02M 3/158 (2006.01); H02M 3/157 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 3/157 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A DC-DC power converter comprising:
a power stage and an output inductor and an output capacitor, in a buck configuration, for coupling to a load;
a type III compensator;
a first feedback loop including the type III compensator, for determining a duty cycle for the power stage in a first mode of operation based on an output voltage provided to the load; and
a second feedback loop including a replica power stage and a resistor and a replica output capacitor and the type III compensator, for determining the duty cycle for the power stage in a second mode of operation;
logic circuitry configured for selecting use of the first feedback loop in the first mode of operation and for selecting use of the second feedback loop in the second mode of operation; and
a load replica selectively couplable into the second feedback loop;
wherein the logic circuitry is further configured for selecting coupling of the load replica into the second feedback loop in a third mode of operation.