The output of the DC voltage can be regulated in a wide range only by changing the datum component.
输出DC电压可在很宽的范围内任意调节，只需要改变基准电压元件。
The chip ensures the regulated 5v voltage output, in condition of no load, in the range from 2.8 to 5v of input voltage.
本芯片能够保证在2.8 ~ 5 V的输入范围内，实现在空载条件下的稳定5v电压输出。
The advantage is that: the output voltage in range can be continuously regulated;
其优点是：输出电压范围内连续可调；
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