A good PCB layout for the TPS3805H33QDCKREP involves placing the device close to the power source, using a solid ground plane, and keeping the input and output capacitors close to the device. Additionally, it's recommended to use a separate analog and digital ground plane to minimize noise coupling.
The input capacitor should be a low-ESR ceramic capacitor with a value of at least 10uF, while the output capacitor should be a low-ESR ceramic capacitor with a value of at least 22uF. The capacitor values can be adjusted based on the specific application requirements and noise tolerance.
The TPS3805H33QDCKREP is rated for operation from -40°C to 125°C, but the maximum ambient temperature range depends on the specific application and the device's power dissipation. It's recommended to derate the device's power dissipation based on the ambient temperature to ensure reliable operation.
The TPS3805H33QDCKREP has a power-good output (PG) that indicates when the output voltage is within regulation. It's recommended to use the PG output to sequence the power-up and power-down of the device, ensuring that the output voltage is stable before enabling the load.
The recommended input voltage range for the TPS3805H33QDCKREP is 2.7V to 5.5V, but the device can operate with input voltages as low as 2.3V. However, the output voltage regulation and accuracy may be affected at lower input voltages.
TPS3805H33QDCKREP datasheet
by Texas Instruments
