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TPS777: Please help me to find a suitable solution

Part Number: TPS777

Dear team,

Could you please help me to recommend a suitable LDO product for my customer? below are the requirements:

   1. ) Input voltage : 2.2~6V (Over 6V is ok , customer request Max at least 6V)
   2. ) Output voltage : 3.3 V
   3. ) Output current : 600 mA 以上
   4. ) Drop voltage : 0.5~0.8V at 3.3V 
   5. ) Power Dissipation : 400mW~600mW
   6. ) Package : SOT-23 , 3pin or 5pin.

I found TPS777 but it seems a old product, please kindly let me know our hero products.

Thank you.


  • HI Kane,

    The TPS777 is not available in a SOT-23 package for your power dissipation, the thermal performance of a SOT-23 is simply insufficient. For example, at best the TJA for a SOT-23 package could be 200C/W. So at 600mW of power dissipation, this is a 120C rise above ambient. 

    If you can use a 2x2 package, the TPS746 is a great choice. Here the TJA is 80.3 so with 600mW of power dissipation, you are looking at only a 48C rise above ambient.

    I hope this answers your question.