
Isolated DC-DC converter module: 4.5-5.5V in, 3.3V/75.7mA out, 0.25W, 74% efficiency, -40°C to +85°C.
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The QS4E_0503S1U is a compact, isolated DC-DC converter module designed for point-of-load power applications. It accepts a 4.5V to 5.5V DC input and provides a regulated 3.3V DC output at a maximum current of 75.7mA, delivering a power output of 0.25W. The module incorporates galvanic isolation between the input and output stages, enhancing system safety and reducing ground loop noise. Its input voltage tolerance is ±10%, providing stable operation under varying input conditions. With a typical efficiency of 74%, the module minimizes power dissipation and heat generation. The QS4E_0503S1U is designed for reliable operation across a wide temperature range of -40°C to +85°C, making it suitable for harsh environments. The isolation barrier is rated for Hypothetical Value kVDC and the module adheres to Hypothetical Safety Standard, e.g., EN62368-1 safety standards.