Recommendation for 24V > 5.2V @ 2A DC-DC with good thermal package

Dear Team,

We are looking for an DC-DC converter with reasonable efficiency and good thermal package. Unfortunately it is not that easy to look for a part on ti.com with the search criteria 'thermal resistance' / RθJA.

Parameters:

• Syncr. non-isolated DC-DC
• Vin = 24V
• Vout = 5.2V
• Iout = 2A (for reliability reason a 2.5-A...3-A version is fine!)
• Reasonable price/efficiency/size
• Low thermal resistance in the range of 27°C/W ... 45°C/W (the lower the better)

In general I was looking for parts with Power Pad Package like SO PowerPad or MSOP PowerPad, but later on also VQFN-HR, VSON-HR and HTTSOP.

Interesting devices could be the 

1. LM53625: nice RθJA however a bit expensive for the target application (only judged by approx. 1k web price).
2. LM43603: Good compromise between RθJA and price.
3. TPS54335A or LMR23625: lower cost alternative with higher RθJA.

Do you maybe have another part on the list, or another package which is known to have a better thermal performance?

Thanks and best regards
Martin