
Isolated DC-DC converter, 5V/50mA output, 4.5-5.5V input, 78% efficiency, -40°C to +105°C operation, 0.25W.
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The QT8B_0505S3UP is a compact, isolated DC-DC converter module designed for point-of-load power applications. This unit provides a regulated 5V DC output at 50mA, delivering 0.25W of power. The input voltage range is specified as 4.5V to 5.5V, tolerating a ±10% variation around a nominal 5V input. Isolation is a key feature, providing galvanic separation between the input and output stages. The converter achieves a typical efficiency of 78%, minimizing heat dissipation. Its robust design allows for operation across a wide temperature range, from -40°C to +105°C, making it suitable for harsh industrial environments. Internal circuitry includes protection against over-temperature and short-circuit conditions. The module utilizes a flyback topology to achieve isolation and voltage regulation.