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LM5160A: LDO (78L12) > 100ºC

Part Number: LM5160A

Hi,

We use LM5160A for flybuck. The input is 9~36VDC and output is 24V. And we require power as following:

  1. 24VDC / 0~200mA
  2. 12VDC / 35mA (Using 78L12 LDO)

There is a problem is that when the input of LM5160A under 12.5V, the U3(LDO) temperature is very high(>100ºC).

Do you have any recommend?

best Regards,

Aaron

P.S.The load always 35mA / 12VDC.