MCT8316Z: MCT8316ZT Buck in Resistor mode

Dear Team,

Could you let me understand how to caluculate the losses of RBK resistor unnder Buck in Resistor mode of MCT8316ZT?

Conditions are as follows,
 - VM=24V
 - VBK=5V by VSEL_BK=Hi-Z
 - No external load, only FB_BK current with ~15mA
 - RBK : 22ohm

My customer evaluates the MCT8316ZT on their board under Buck in Resistor mode. And the customer has a heat issue with the RBK resistor now.

About the SW_BK operation under Buck in Resistor mode, does the SW_BK output PWM pulse of VM-GND amplitude with On duty cycle of VBK/VM?

I look forward to your reply.
Thank you.

Best Regards,

Koshi Ninomiya