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发表于 2011-1-4 02:34:06
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think about the power transferring from input to output. For ldo case, input power Pin=Vin*Iin, and output power Pout=Vout*Iout, while Iin=Iout, and Vout<Vin, your Pout<Pin. For DC-DC case, the power is stored in reactive devices, thus with ideal components, theoretically no power is lost when transferred from input to output. The difference between these two is basically straight physics. |
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