As shown in the figure, lt8610ab can't work without power output. If you change to lt8610, it can work normally. Please help to solve it. Thank you

Hello,

could you please be more specific? Why should the LT8610AB not work in a circuit where the LT8610 does operate normal? The differences of both parts are described in the DS and should not influence normal operation to generate 4V from your 12V input source.
Does your question come from Simulation results or real hardware measurements?

您好，谢谢您的回覆

通过了软件仿真，但是硬件调试无法正常工作

LT8610AB的所有引脚参数都是错误的。我严格按照手册安排了PCB。这个问题很奇怪

I will move your question the China E-zone forum so ADI chinese counterparts can help.

I will move your question the China E-zone forum so ADI chinese counterparts can help.