DCR021205: Equivalent circuit

Hi Team,

A customer is using DCR021205P however, the stock is very limited.

Now the customer is asking for an alternative solution for their design and would like to know if we can suggest a 2 or 3-part circuit solution that functions like DCR021205 that can generate a very quiet +5V and -5V from a 12V (Input Voltage Range is 10.8V to 13.4V, 12V nominal) battery and Current draw >= 400 mA.

I am thinking of using an isolated DC-DC converter followed by 2 LDO with low ripple voltage to generate the positive and negative voltages. Would this work?

I am hoping you can help.

Thanks!

Regards,

Marvin