> -----Original Message-----
> From: Roman Black [SMTP:fastvid@EZY.NET.AU]
> Sent: Friday, August 02, 2002 2:13 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [EE]: LM3485 Hysteretic PFET Buck Controller.
>
> Hi Mike, it's not cheap at all, $0.50 x 1000.
> In the circuit you showed you could probably replace
> the LM3485 with a cheap 8 pin comparator chip, or
> even a transistor and zener. With that many external components and FET
> you have many options for a much cheaper circuit.
> (once you are buying 1000 of them!) :o)
> -Roman
>
I wonder if you could achieve the 93% efficiency and the load regulation of
that IC though!

Regards

Mike

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