Bourns provides a recommended PCB layout and land pattern in their application note AN164, which can be found on their website. It's essential to follow these guidelines to ensure proper thermal management, minimize parasitic inductance, and optimize the overall performance of the SM91501AL-E.
The selection of input and output capacitors depends on the specific requirements of your application, such as voltage rating, capacitance value, and ESR. Bourns recommends using low-ESR capacitors with a voltage rating of at least 2x the maximum input voltage. A good starting point is to use capacitors with a capacitance value of 10uF to 22uF for the input and 22uF to 47uF for the output.
The SM91501AL-E has an operating temperature range of -40°C to +125°C, but the maximum junction temperature (TJ) should not exceed 150°C. It's essential to ensure proper thermal management and heat sinking to prevent overheating and ensure reliable operation.
To ensure EMC and reduce EMI, follow proper PCB layout and design practices, such as using a solid ground plane, minimizing loop areas, and using shielding and filtering components as needed. Additionally, consider using a metal shield or enclosure to contain EMI radiation. Bourns also provides guidance on EMC and EMI reduction in their application notes and design guides.
Bourns recommends a soldering profile with a peak temperature of 260°C to 270°C, a dwell time of 10-30 seconds, and a ramp rate of 3°C/second to 6°C/second. It's essential to follow a controlled soldering process to prevent damage to the device and ensure reliable operation.
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