Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for switching regulator layout, such as keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing trace lengths and widths.
To ensure stability, make sure to follow the recommended component values and layout guidelines, and also consider the output capacitor's ESR (Equivalent Series Resistance) and ESL (Equivalent Series Inductance) when selecting the output capacitor. Additionally, a minimum of 10uF output capacitance is recommended.
Although the datasheet specifies a maximum input voltage of 12V, it's recommended to derate the input voltage to 10.5V to ensure reliable operation and to account for voltage spikes and transients.
The TPS3110E12DBVR is rated for operation up to 125°C, but it's essential to consider the thermal design and ensure that the IC's junction temperature (TJ) does not exceed the maximum rating. This may require additional thermal management, such as heat sinks or thermal interfaces.
Start by verifying the input voltage, output voltage, and current. Check the PCB layout and component values against the recommended design. Use an oscilloscope to observe the output voltage and current waveforms. If issues persist, consult the datasheet and application notes, or contact Texas Instruments' support team for further assistance.
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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.
