> I would really like surface mount components.  Does anyone know of any
> Maxim or similar
> products that will work.  Space is to a premium.
>
> Thanks
>
>
> -----Original Message-----
> From: Mike Harrison [SMTP:mike@whitewing.co.uk]
> Sent: Wednesday, August 29, 2001 2:03 PM
> To:   Graham North
> Subject:      Re: [ee]: 35 to 40 Volt Output Charge Pump
>
> IN Which case a switchmode stepupfrom the 20V rail would be the
> easiest. - check out the Nat. Semi simple switcher range.
>
> On Wed, 29 Aug 2001 12:34:19 +0100, you wrote:
>
> >I need about acouple of hundred milli amps.
> >
> >Space is also a problem. (theres never enough is there!), surface
> mount
> >would be preferable.
> >
> >Thanks
> >
> >> -----Original Message-----
> >> From:      Mike Harrison [SMTP:mike@WHITEWING.CO.UK]
> >> Sent:      Wednesday, August 29, 2001 12:15 PM
> >> To:        PICLIST@MITVMA.MIT.EDU
> >> Subject:   Re: [ee]: 35 to 40 Volt Output Charge Pump
> >>
> >> On Wed, 29 Aug 2001 09:34:03 +0100, you wrote:
> >>
> >> >Hi
> >> >
> >> >Does anyone know of a circuit to generate 35 to 40 Volt output?
> >> >
> >> >The Voltages available to power the circuit are:
> >> >
> >> >3.3V, or 5V, or 10V, or 20V
> >> >
> >> >Thanks
> >> How much current do you need ?
> >> If low (a mA or two), a charge-pump based on a 4049 hex inverter (2
> >> gates for the oscillator, and two pairs of parallelled gates as
> >> drivers) ruuning from the 10V supply will be the cheapest option.
> >>
> >> --
> >> http://www.piclist.com hint: To leave the PICList
> >> mailto:piclist-unsubscribe-request@mitvma.mit.edu
> >>

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