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tlv1117-50cdcy excess heating

veeresh shidlagatti
Prodigy 20 points
Other Parts Discussed in Thread: TLV1117

sir,

      In our project we are using  TLV1117-50CDCY we giving Vin=12V  and taking Vout=5V  . Its generating excess heat when we connected 250mA load .plz reply as earliest.

  • 0
    TI__Guru**** 164656 points

    Veeresh,

    The power dissipated in the device is VIN*ICC+(VIN-VOUT)*IOUT = 12V*5mA+7V*250mA = 1.81Watt

    The heat needs to flow easily into the printed circuit board then the PCB conducts heat to ambient air.
    If the tlv1117 is too hot then the PCB is too hot or the PCB does not accept heat from the tlv1117 well.
    There should be a good thermal path from the copper under the tlv1117 pad to the PCB ground plane.