backgroundView.frame = CGRectMake(3, 3, 55, 55);

if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone) {
    backgroundView.frame = CGRectMake(3, 3, 55, 55);
} else {
    backgroundView.frame = CGRectMake(/* iPad-friendly values here*/);
}

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
// iPad
{

}
else
// iPhone
{

}