Title:
POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/168403
Kind Code:
A1
Abstract:
The present invention stabilizes the output voltage to a prescribed target voltage using a charge pump circuit. This power supply device comprises: a first voltage dividing unit that is disposed between an output line to which an output voltage is applied and a feedback line, and that generates a first divided voltage according to the output voltage; and a second voltage dividing unit that is disposed between the feedback line and a ground, and that generates a second divided voltage according to the output voltage. A voltage is generated in the feedback line as a feedback voltage which is lower than the output voltage only by the first divided voltage. The second voltage dividing unit has a specific transistor of an N-channel type having a gate that receives a reference voltage and a drain connected to the feedback line.
Inventors:
FUJIMURA DAIGO (JP)
YAMAMOTO SEIICHI (JP)
YAMAMOTO SEIICHI (JP)
Application Number:
PCT/JP2021/042637
Publication Date:
August 11, 2022
Filing Date:
November 19, 2021
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H02M3/07
Foreign References:
| JP5940691B1 | 2016-06-29 | |||
| JP2006014581A | 2006-01-12 | |||
| JP2015177320A | 2015-10-05 | |||
| JP2013168880A | 2013-08-29 | |||
| US20070013434A1 | 2007-01-18 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
Download PDF: