A good PCB layout for the TPS651851RSLR involves placing the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the input and output traces. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure the stability of the output voltage, it's essential to choose the correct output capacitor value and type. A minimum capacitance of 10uF is recommended, and the capacitor should have a low ESR (Equivalent Series Resistance) to minimize voltage ripple. Additionally, the output voltage can be stabilized by adding a small ceramic capacitor (e.g., 100nF) in parallel with the output capacitor.
The TPS651851RSLR can handle a maximum input voltage of 18V. However, it's recommended to operate the device within the specified input voltage range of 4.5V to 15V for optimal performance and reliability.
The TPS651851RSLR is rated for operation up to 125°C. However, the device's performance and reliability may degrade at high temperatures. It's essential to ensure proper thermal management and consider the device's thermal characteristics when designing for high-temperature applications.
To troubleshoot issues with the TPS651851RSLR, start by verifying the input voltage and current, as well as the output voltage and current. Check the PCB layout and component placement to ensure they meet the recommended guidelines. Use an oscilloscope to measure the output voltage ripple and noise. If the issue persists, consult the datasheet and application notes for guidance, or contact Texas Instruments' support team for further assistance.
TPS651851RSLR datasheet
by Texas Instruments
