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关于LM1117-ADJ输出电压调节电阻的问题

Other Parts Discussed in Thread: LM1117

需要对输出进行电流采样,所以在输出端串接了采样电阻R3=100R,为了保证到达负载的电压仍为我所设定的1.9V,所以我想将调节输出电压的R1的一端接到采样电阻之后。如下图。

在LM1117的式样书中记载“The LM1117 adjustable version develops a 1.25V reference voltage, VREF, between the output and the adjust terminal.”

我想问的是:此时1.25V为LDO的out_pin与adj_pin之间的电压还是R1两端的电压?