
Isolated DC-DC converter module: 4.5-5.5V input, 12V/21mA output, 75% efficiency, -40°C to +105°C operation.
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The QS4A_0512S1.5UP is a highly compact, galvanically isolated DC-DC converter module designed for point-of-load applications. It delivers a regulated 12V DC output at 21mA from a nominal 5V input (4.5V – 5.5V range, ±10% tolerance). This module utilizes a fixed-frequency switching topology to achieve a typical efficiency of 75% across the specified input voltage range. Isolation is provided via a transformer-based architecture, ensuring robust electrical separation between input and output. The module is rated for operation across a wide temperature range of -40°C to +105°C, making it suitable for demanding industrial environments. With a maximum power output of 0.25W, it is ideally suited for powering low-power analog and digital circuits. The compact form factor facilitates easy integration into existing PCB layouts. Internal protection features include short-circuit protection.