Texas Instruments provides a recommended PCB layout in the TPS79901 evaluation module documentation, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize noise.
To ensure stability, it's essential to follow the recommended component values and PCB layout, and to add a sufficient output capacitor with a low equivalent series resistance (ESR) to filter out noise and ripple. Additionally, the input capacitor should be placed close to the VIN pin to reduce input noise.
Although the datasheet specifies a maximum input voltage of 5.5V, the device can handle input voltages up to 6V for short durations (e.g., during power-up or voltage transients). However, continuous operation above 5.5V is not recommended to ensure reliability and prevent damage to the device.
The TPS79901MDRVTEP is rated for operation up to 125°C, but the device's performance and reliability may degrade at high temperatures. It's essential to follow the recommended operating conditions and thermal management guidelines to ensure reliable operation in high-temperature environments.
To troubleshoot issues, start by verifying the input voltage, output voltage, and enable pin (EN) status. Check for proper PCB layout, component values, and soldering quality. Use an oscilloscope to measure the output voltage and input voltage ripple. Consult the datasheet and application notes for guidance on troubleshooting common issues.
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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.
