ZHCSLJ5D February 2022 – March 2023 TIOL112 , TIOL1123 , TIOL1125
PRODUCTION DATA
For a 200 mA current limit:
This causes a power consumption of:
For a 5 mA LDO current output,
Total power dissipation,
Multiply this value with the Junction-to-ambient thermal resistance of θJA = 45.9 °C/W (taken from the Thermal Information table table) to receive the difference between junction temperature, TJ, and ambient temperature, TA:
Add this value to the maximum ambient temperature of TA = 105°C to receive the final junction temperature:
As long as TJ is below the recommended maximum value of 150°C, no thermal shutdown will occur. However, the junction temperature is closer to TWRN and thermal warning may be generated if the junction temperature rises above TWRN.
Note that the modeling of the complete system may be necessary to predict junction temperature in smaller PCBs and/or enclosures without air flow.