Patent ID: 9634570
Date: 2017-04-25
CPC Classifications: H02M,H03K

Claim:
1. A multi-mode power converter comprising: an input port; an output port; a switching terminal coupled to the input port through an inductive element; a first transistor coupled between the switching terminal and a ground; a second transistor and a third transistor coupled in series between the switching terminal and the output port; wherein the multi-mode power converter has a boost operation mode and a buck operation mode; and wherein in the boost operation mode, the second transistor is ON while the first transistor and the third transistor are switched ON and OFF complementarily, or the second transistor and the third transistor are switched ON and OFF substantially simultaneously while the first transistor and the third transistor are switched ON and OFF complementarily; and wherein in the buck operation mode, the second transistor is ON while the first transistor and the third transistor are switched ON and OFF complementarily, and wherein an on-resistance of the second transistor is regulated to ensure the multi-mode power converter operates normally in the buck operation mode.