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Title:
LOW DROPOUT REGULATOR AND VOLTAGE REGULATION METHOD
Document Type and Number:
WIPO Patent Application WO/2017/107193
Kind Code:
A1
Abstract:
A low dropout regulator and a voltage regulation method. The low dropout regulator comprises a first switch array module (100), a signal control module (200), a power switch module (300), a voltage feedback module (400), and a switch control module (500); the first switch array module (100) comprises multiple passages connected in parallel and used for inputting a first voltage (V1) and outputting a second voltage (V2); the signal control module (200) is used for periodically regulating conduction time and conduction state of the multiple passages connected in parallel, in order to periodically regulate the second voltage (V2); the power switch module (300) is used for inputting the second voltage (V2) and outputting a third voltage (Vo); the voltage feedback module (400) is used for generating a feedback voltage (Vreg) according to the third voltage (Vo); the switch control module (500) is used for controlling the conduction state of the power switch module (300) according to the comparison result between the feedback voltage (Vreg) and a reference voltage (Vref), in order to regulate the magnitude of the third voltage (Vo) and maintain the third voltage (Vo) within a preset value range, thereby improving the frequency response characteristic of the low dropout regulator and improving its performance by means of a non-algorithmic approach.

Inventors:
TANG, Yangyang (Huawei Administration Building, Bantian Longgang Distric, Shenzhen Guangdong 9, 518129, CN)
WANG, Xinru (Huawei Administration Building, Bantian Longgang Distric, Shenzhen Guangdong 9, 518129, CN)
ZHANG, Chen-Xiong (Huawei Administration Building, Bantian Longgang Distric, Shenzhen Guangdong 9, 518129, CN)
Application Number:
CN2015/098943
Publication Date:
June 29, 2017
Filing Date:
December 25, 2015
Export Citation:
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Assignee:
HUAWEI TECHNOLOGIES CO., LTD. (Huawei Administration Building, Bantian Longgang Distric, Shenzhen Guangdong 9, 518129, CN)
International Classes:
H02M3/156; G05F1/563
Domestic Patent References:
WO2015018002A12015-02-12
Foreign References:
CN102075088A2011-05-25
JP2006158110A2006-06-15
CN101242141A2008-08-13
CN102308464A2012-01-04
US20120223686A12012-09-06
US20090134858A12009-05-28
US5886509A1999-03-23
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (Room 1521, West Block Guomao Buildin, Shenzhen Guangdong 4, 518014, CN)
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