SI9910DJ-E3 footprint, schematic symbol and 3D model by Vishay

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SI9910DJ-E3 Details

The recommended PCB footprint for the SI9910DJ-E3 is a 5-pin SOT23 package with a 1.5mm x 2.5mm body size. A minimum pad size of 0.5mm x 0.5mm is recommended for each pin.
To ensure proper biasing, connect the input pin (VIN) to a stable voltage source between 4.5V to 18V, and the enable pin (EN) to a logic-level signal (0V or VIN). The output pin (VOUT) should be decoupled with a 10uF ceramic capacitor.
The SI9910DJ-E3 is capable of delivering up to 1A of continuous output current. However, it's recommended to limit the output current to 0.8A for optimal reliability and thermal performance.
To protect the SI9910DJ-E3 from overvoltage and undervoltage conditions, consider adding a voltage supervisor or a reset IC to monitor the input voltage and reset the device if it falls outside the recommended operating range.
The thermal derating curve for the SI9910DJ-E3 is typically 1.5% per °C above 25°C. This means that for every 1°C increase in temperature above 25°C, the maximum output current capability decreases by 1.5%.

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