发明名称 |
Constant-voltage circuit capable of reducing time required for starting, semiconductor apparatus including constant-voltage circuit, and control method of constant-voltage circuit |
摘要 |
A constant-voltage circuit includes a switching regulator and a series regulator each configured to start operating according to a selection signal input from outside the integrated circuit for exclusively causing one of the switching or the series regulators to operate, convert an input voltage to a rated voltage and to output the voltage to an output terminal. The switching regulator performs a soft-start operation for raising an output voltage to the rated voltage at a constant speed when starting operation. The series regulator regulates a current so that an output current does not exceed a predetermined value, simultaneously starts operating when the switching regulator starts operating, and automatically stops outputting a current to the output terminal when the soft-start operation is completed. A semiconductor apparatus provided with a predetermined function includes the constant-voltage circuit. A control method controls the constant-voltage circuit.
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申请公布号 |
US2006238178(A1) |
申请公布日期 |
2006.10.26 |
申请号 |
US20060408028 |
申请日期 |
2006.04.21 |
申请人 |
AGARI HIDEKI;SAKAI YOHICHI |
发明人 |
AGARI HIDEKI;SAKAI YOHICHI |
分类号 |
G05F1/00;H02M3/155 |
主分类号 |
G05F1/00 |
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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