Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general best practices for switching regulator layout, such as keeping the input and output capacitors close to the IC, and using a solid ground plane to reduce noise and EMI.
To ensure stability, make sure to follow the recommended component values and layout, and also add a small ceramic capacitor (e.g. 10nF) between the VIN and EN pins to filter out noise. Additionally, ensure that the output capacitor has a low ESR and is placed close to the IC.
Although the datasheet specifies a maximum input voltage of 5.5V, it's recommended to derate the input voltage to 5V or less to ensure reliable operation and prevent damage to the IC.
The LMR36503R5URPER is rated for operation up to 125°C, but it's recommended to derate the output current and input voltage at high temperatures to prevent overheating and ensure reliable operation. Consult the datasheet for thermal derating curves.
The output voltage ripple can be calculated using the formula: ΔVout = (Iout * ESR) / (fsw * Cout), where Iout is the output current, ESR is the output capacitor's equivalent series resistance, fsw is the switching frequency, and Cout is the output capacitance. Consult the datasheet for recommended component values and switching frequency.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
