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DC DC Converters

RU-3.30505/P application field and working principle

RU-3.30505/P is an advanced non-isolated buck DC-DC converter from RECOM, a world leader in DC/DC power conversion products and services. It is specifically designed to provide the highest efficiency and low noise performance for a wide range of applications, including data center power management, communications infrastructure, industrial and consumer market power solutions.

The RU-3.30505/P is an ultra low power, high efficiency DC-DC regulator. Its low ripple and high efficiency output regulation is ideal for many low-power and medium-power applications. Its design is based on RECOM’s patented Constant On-Time (COT) control topology combined with a proprietary thermal protection circuit. Its input voltage range is exceptionally wide, from 3 to 30 V, making it suitable for most applications, including those in the automotive industry.

The RU-3.30505/P provides excellent performance with a typical efficiency of up to 95%, a very low quiescent current of only 20 mA and adjustable current limit over output current range from 0 to 2 A. This unit is also equipped with optional overvoltage protection (OVP) for applications requiring some degree of overload protection. With its fully integrated protection scheme including short circuit protection and automatic thermal shutdown, it is robust enough for any application.

The working principle of the RU-3.30505/P DC-DC converter is based on the implementation of a synchronization technique which allows for the switching frequency of the converter to remain constant. To achieve this, a constant-on-time (COT) comparator continuously monitors the output voltage and adjusts the switching frequency to maintain the required voltage level. The COT comparator is then used to drive the clock signal of the high-side MOSFET driver. The output of the COT comparator is the clock signal for the high side MOSFET driver and the low side MOSFET driver.

To ensure additional protection, the RU-3.30505/P also includes current-mode limit control for output current limitation, adjustable OVP for overvoltage protection, and automatic thermal shutdown. This ensures both the efficiency and the safety of the converter. In addition, the device is subjected to an on-chip self-calibration process that reduces initial production calibration costs and allows it to operate within tight specification, providing guaranteed performance.

In summary, the RU-3.30505/P DC-DC converter provides an advanced power solution for many applications, thanks to its wide input voltage range, high efficiency, low quiescent current and low noise operation. It is highly customizable and offers reliable protection, thus making it suitable for a variety of applications where low power and high performance are required.

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