求一个5V变9V的电路和元件说明

核心提示调节电阻就可以达到9VThe?output?voltage?is?set?by?two?external?resistors?(R2and?R3,?Figures?2,?3,?4,?and?5).?First?select?a?value?

调节电阻就可以达到9V

The?output?voltage?is?set?by?two?external?resistors?(R2

and?R3,?Figures?2,?3,?4,?and?5).?First?select?a?value?for

R3?in?the?10kto?1Mrange.?R2?is?then?given?by:

R2?=?R3?[(VOUT?/?VREF)?–?1]

where?VREF?is?1.25V.

 
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