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TPS7A88芯片使用时是否还需要利用一个DCDC芯片去驱动

Other Parts Discussed in Thread: TPS7A88

在TPS7A88的数据手册上看到,如下这个

input voltage          1.8V,provide by the dc-dc converter swtichting at 750KHz

这个是意味着这款LDO芯片的输入需要被dc-dc的输出驱动么?