公开(公告)号：US09641076B2

公开(公告)日：2017-05-02

申请号：US14589332

申请日：2015-01-05

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ryotaro Kudo ,  Gwang-yol Noh ,  Hwa-yeal Yu

IPC: H02M3/158 ,  H02M1/14

CPC classification number: H02M3/158 ,  H02M1/14 ,  H02M3/1588 ,  H02M2003/1586 ,  Y02B70/1466

Abstract: A switching regulator switches a current from input direct current (DC) power to generate target DC power. The switching regulator includes: a direct current (DC)-DC converter and a ripple injection circuit. The DC-DC converter is configured to: generate an output voltage at an output terminal based on an input voltage applied to an input terminal, and according to a switching cycle that selectively forms a voltage-down current path or a voltage-up current path based on a comparison between a reference voltage and a voltage sensed at a feedback node; and apply a feedback current from the output terminal to the feedback node. The ripple injection circuit is configured to: generate a pulse current synchronized with the switching cycle; and apply the pulse current to the feedback node.