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放大器OPA2227的正负电源上电先后的影响

Other Parts Discussed in Thread: OPA2227

在我自己设计的电路中,OPA2227有+5V和-6V两个电源,用一个直流电源输出正负6V的两路电压,负6V电压直接给放大器供电,正6V电源通过一个三端稳压器转换成正5V给放大器供电,因为负电压比正电压先出现,导致了有时候三端稳压器没有正5V的输出,而在其输出端出现了一个大约-0.5V的电压。请问为什么会出现这种现象?