Hi Graham

You could look at the LM2577 - ADJ from national semiconductor.
It is a switching regulator and it can go up to 60V max out.

I have been using it as a 12-24V doubler for which it is ideally suited.

You can view the data sheet at:

http://www.national.com/ads-cgi/viewer.pl/ds/LM/LM1577.pdf

Regards

Alan

Embedded Systems Engineer
Microtima Ltd
Ouseburn Mews
3-7 Stepney Bank
Newcastle upon Tyne
NE1 2PW

Tel: 0191 2304411
Fax: 0191 2304422


-----Original Message-----
From: Graham North <grahamnorth@CASTLEGROUP.CO.UK>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: 29 August 2001 10:06
Subject: [ee]: 35 to 40 Volt Output Charge Pump


>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
>
>Graham North, BEng(Hons), AMIEE
>Castle Group Ltd
>Salter Road
>Scarborough
>North Yorkshire
>YO11 3UZ
>
>Tel No: 01723 584250
>Fax No: 01723 583728
>E-Mail: grahamnorth@castlegroup.co.uk
>
>--
>http://www.piclist.com hint: To leave the PICList
>mailto:piclist-unsubscribe-request@mitvma.mit.edu
>
>

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