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+5.5V转-5.5VDCDC芯片求推荐

Other Parts Discussed in Thread: OPA657, TPS65135, LM27761, TPS561208, TPS7A49, TPS60400

用于高速运放 opa657的供电,想法是先用DCDC把+5.5V转换成-5.5V,,再用负压的LDO进行降压到-5V,然后给opa657供电。由于对整个系统噪声要求较高,有没有什么合适的DCDC芯片推荐?