maybe need a buck DC/DC

The use of 'linear' components in achieving this is possible, but energy wasteful (losses mean heat generation)

I would suggest a circuit based upon the Analog Devices LT3845 Current mode step-down converter would be suitable. A circuit which can attain the parameters you require (and is easily modified) is given on page 1 of the data sheet.Note that heatsinking of the power MOSFET(s) in the output stage will be necessary, and can be calculated from the current and efficiency figures.(data sheet)

I attach the data sheet for this IC

Hi Maizal

The use of 'linear' components in achieving this is possible, but energy wasteful (losses mean heat generation)

I would suggest a circuit based upon the Analog Devices LT3845 Current mode step-down converter would be suitable. A circuit which can attain the parameters you require (and is easily modified) is given on page 1 of the data sheet. Note that heatsinking of the power MOSFET(s) in the output stage will be necessary, and ratings can be calculated from the current and efficiency figures.(data sheet)

I attach the data sheet for this IC

Al

Hello Maizal Isnen ,

Have a look at the quick power search on Analog Devices:

https://www.analog.com/en/products/power-management/switching-regulators/step-down-buck-regulators.html

Many manufacturers have similar search functions (MAXIM, TI, ST Microelectronics, etc.)

Jules