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Power Conservation in 3V/5V Dual-Supply Systems

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  • 上传时间:2022-01-06
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  • 标      签: 供电系统

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The MAX1630/MAX1633 and MAX1632/MAX1635 ICs each contain 12V/120mA linear regulators in addiTIon to the 5V and 3.3V regulators. In place of 12V regulators, the MAX1631/MAX1634 devices accept feedback from a transformer secondary and provide a control pin that selects which regulator (3.3V or 5V) receives the secondary-feedback signal. This signal aids in the generaTIon of auxiliary voltages other than 12V. Coupled via an external resistor divider, it adjusts the point of voltage regulaTIon for the secondary winding. A simplified applicaTIon circuit, containing no transformer and therefore producing only two output voltages, is shown in Figure 1.
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