Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital grounds separate. Additionally, use a ferrite bead or a 10-ohm resistor in series with the VCC pin to reduce high-frequency noise.
To ensure accurate voltage regulation, use a high-quality input capacitor (e.g., 10uF ceramic) and a low-ESR output capacitor (e.g., 22uF ceramic). Also, keep the input and output capacitors close to the device and use a short, wide trace for the output voltage.
Although the datasheet specifies a maximum input voltage of 5.5V, it's recommended to limit the input voltage to 5V to ensure reliable operation and prevent damage to the device.
The DS3487M is rated for operation up to 125°C, but it's essential to consider the device's power dissipation and thermal resistance when designing for high-temperature applications. Ensure proper heat sinking and thermal management to prevent overheating.
Start by verifying the input voltage, output load, and PCB layout. Check for proper decoupling, and ensure that the input and output capacitors are of sufficient value and quality. Also, review the device's thermal management and consider using a thermal camera to identify hotspots.
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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.
