VOLTAGE REGULATOR

专利名称：VOLTAGE REGULATOR发明人：HALLIKAINEN, Samuli申请号：EP17811357.7申请日：20171130公开号：EP3548981A1公开日：20191009

摘要：A low-dropout voltage regulator provides an output voltage VDD from outputcircuit 10 controlled by a differential amplifier 4 which determines the differencebetween a reference voltage VREF and the output voltage VDD. A first bias current isprovided to the differential amplifier by an adaptive bias circuit 6 depending on ameasurement of the output current. A second bias current is provided to the differentialamplifier by a boost circuit 8 having a DC blocking capacitor C0 connected to the outputdepending on a measurement of the rate of change of output voltage. The differentialamplifier can also receive a static bias current 12 regardless of output current andcomprise a long tailed pair having tail transistors MN7, MN6 and MN5 for boost, staticand adaptive bias currents respectively. A current comparator can set an overcurrent flagICMP, to enable a further regulator, when output current exceeds a threshold and alsouse adaptive biasing. The adaptive and boost biasing can include low pass filters formedfrom transistors.

申请人：Nordic Semiconductor ASA

地址：Otto Nielsens veg 12 7052 Trondheim NO

国籍：NO

代理机构：Dehns

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