Patent ID: 9722482
Date: 2017-08-01
CPC Classifications: H02M,Y02B

Claim:
1. A buck converter and regulation loop with pulse skipping modulation (PSM) and direct auto-transition to pulse frequency modulation (PFM) where in PFM the buck converter is self oscillating wherein the oscillating frequency of the PFM pulses depends on the inductor current, while in PSM clock cycles are skipped comprising: a peak current loop configured to provide a method of generating a constant minimal inductor peak current being set in a time domain by a circuitry configured to set a constant minimal inductor peak current, wherein said circuitry is configured to determine a minimum duration of a pulse which determines the minimal inductor peak current; said peak current loop configured to enable a method of skipping pulses utilizing a pulse skipping modulation (PSM) mode of operation, wherein clock pulses are masked to enable the pulse skipping; and said peak current loop configured to enable a method of a seamless direct auto-transition from said pulse skipping modulation (PSM) to a pulse frequency modulation (PFM) mode of operation, wherein the direct auto-transition from PSM to PFM is performed once a threshold number of skip pulses is counted and wherein a lower value of an inductor current threshold is used to enter PFM mode of operation again.