+5V to -5V conversion of powered supplied vis USB

[teekay_tk]

hi all
i am designing a micro controller circuit that is powered by usb. but some of the functionality need +5 to -5 volt range while usb provides only +5 volt, is there an easy way to convert the +5 to -5 volts as well?

 

[IanP]

Re: +5 to -5 conversion

For output currents below 100mA consider charge pump converters ..
For example, LM2663, LT1054, MAX660, MAX619, and so on ..
Make search in GOOGLE to find their data sheets ..
What they do, they produce -Vin out of +Vin, in other words, when you apply +5V to their input you will have output voltage of -5V ..

Regards,
IanP