Voltage regulator
AssigneeHangzhou Vango Technologies, Inc.
InventorsLing LIN, Nick Nianxiong Tan, Xiangyang JIANG, Zhong TANG
Life of this patent
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Abstract
Disclosed is a voltage regulator, which makes a low dropout regulator stop working by controlling a sampling circuit of the low dropout regulator to break in a sleep mode, and makes an output voltage of the low dropout regulator follow an output voltage of a first bias voltage generating circuit by using a first MOS transistor connected between an voltage input end and an voltage output end of the low dropout regulator in a source follower structure, and is capable of controlling an output voltage of the whole voltage regulator by a generated bias voltage applied to the first bias voltage generating circuit by a first bias current source.
Claims7
A voltage regulator, comprising a low dropout regulator, a first MOS transistor, a second MOS transistor, a first bias current source, a first bias voltage generating circuit, a switch inserted in a sampling circuit of the low dropout regulator, and a controller connected with a control end of the switch and configured to switch off the switch in a sleep mode;
- wherein a drain of the first MOS transistor and a positive end of the first bias current source are both connected with a voltage input end of the low dropout regulator, a source of the first MOS transistor is connected with a voltage output end of the low dropout regulator, a gate of the first MOS transistor, a negative end of the first bias current source, a drain of the second MOS transistor, and a gate of the second MOS transistor are connected, a source of the second MOS transistor is connected with a positive electrode of the first bias voltage generating circuit, and a negative electrode of the first bias voltage generating circuit is grounded.
Dependencies are inferred from the claim text.