The National simple switcher range are available in TO263-5 surface mount packages. They should also easily meet your o/p current requirements. Alan -----Original Message----- From: Graham North To: PICLIST@MITVMA.MIT.EDU Date: 29 August 2001 16:06 Subject: FW: [ee]: 35 to 40 Volt Output Charge Pump >> 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 >> >> > >-- >http://www.piclist.com hint: To leave the PICList >mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu