hi friends,
i have 5V in my circuit and i want to convert it to 15V to give it to opamp
can any one please suggest me is there any IC which will convert 5V DC to 15V DC.
Loads of them. Look at national.com & put your input & output voltage/current requirements in the box in the top right of the page. There are others from Linear Technology, Maxim, loads of manufacturers. Look for DC-DC converters. You can buy ready made ones as well.