ZHCSU65D February 2010 – June 2025 TPS73801
PRODUCTION DATA
Example: Given an output voltage of 3.3 V, an input voltage range of 4 V to 6 V, an output current range of 0 mA to 500 mA, and a maximum ambient temperature of 50°C, what is the operating junction temperature?
The power dissipated by the device is equal to:
where:
So,
The thermal resistance of the DCQ package is 50.5°C/W. So the junction temperature rise above ambient is approximately equal to:
The junction temperature rise can then be added to the maximum ambient temperature to find the operating junction temperature (TJ):