The maximum operating temperature range for the TPS2815DR is -40°C to 125°C. However, it's recommended to operate within -40°C to 85°C for optimal performance and reliability.
To ensure proper power-up and initialization, make sure to follow the recommended power-up sequence: VCC, then EN, and finally IN. Also, ensure that the input voltage is within the recommended range and that the output capacitor is properly sized.
To minimize EMI and noise, place the TPS2815DR close to the input capacitors and keep the input and output traces short and separate. Use a solid ground plane and avoid routing sensitive signals near the switching node. Also, consider using a shielded inductor and a common-mode choke to reduce EMI.
To calculate the output voltage ripple, use the following formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency. Ensure that the calculated ripple is within your application's requirements by selecting the appropriate output capacitor and inductor values.
When selecting input and output capacitors, consider the following factors: voltage rating, capacitance value, equivalent series resistance (ESR), and equivalent series inductance (ESL). Choose capacitors with low ESR and ESL to minimize losses and ensure stable operation. Also, ensure that the capacitors are rated for the maximum operating temperature and meet the required ripple current rating.
TPS2815DR datasheet
by Texas Instruments
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