Using BQ25120A with nrf52832

I am using BQ25120A with nrf52832, but when I power up the nrf52 with battery then it continuously reboots. What is the reason behind this and how should I overcome it? Initially I tried with DK board but still found the same issue. And also the problem persists when using only nrf25 module.

I am communicating using i2c with BQ25120A to set the Vsys to 3.0 V so once it sets the system voltage the device then resets or hangs(do know wxactly what happens) as I am not able to get the prints on the terminal.