这个芯片的spec里有这样的描述：
If it is desired to increase the slope of the voltage limited duty cycle characteristic, two possible configurations are shown in Figure 30. After the LM5026 is enabled, the zener diode causes the UVLO pin voltage to increase more rapidly with increasing input voltage (VPWR).
想问下，稳压管在这里是怎么起到让UVLO的电压快速升高的作用的？
