发明名称 |
LOW DROPOUT REGULATOR AND THE OVER CURRENT PROTECTION CIRCUIT THEREOF |
摘要 |
An over current protection circuit for low dropout regulator comprises a sense transistor, a sense resistor, an operational amplifier and a first transistor. The sense transistor senses the current flowing through the power transistor. The sense resistor is coupled to the sense transistor and shares the same current flowing through the sense transistor. The operational amplifier outputs a control signal according to the voltage across the sense resistor and a reference voltage. The first transistor controls the power transistor according to the control signal.
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申请公布号 |
US2010026254(A1) |
申请公布日期 |
2010.02.04 |
申请号 |
US20080236064 |
申请日期 |
2008.09.23 |
申请人 |
ADVANCED ANALOG TECHNOLOGY, INC. |
发明人 |
KAO SHUN HAU;CHIEN MAO CHUAN |
分类号 |
G05F1/573 |
主分类号 |
G05F1/573 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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