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PMIC - Voltage Regulators - DC DC Switching Regulators

DC-DC switching regulators are essential components of modern power supplies in a wide variety of applications. In this article, we will explain the application field and working principles of S-85S1AB30-I6T1U, an advanced DC-DC switching regulator.

Application Field

The S-85S1AB30-I6T1U DC-DC switching regulator is designed to be used in harsh applications with extreme temperature conditions, from -40°C to +85°C. This capability makes the regulator well-suited for use in industrial, automotive, and military applications. The regulator is able to handle 24V input voltages, making it suitable for renewable energy applications such as wind and solar, as well.

The S-85S1AB30-I6T1U is designed for high-performance applications, providing excellent dynamic load and line regulation of ±3% over output voltages from 0.8 V to 36 V. This regulator is extremely efficient, with efficiency peaks up to 97%, which makes it an ideal choice when considering efficiency and application lifecycle cost. Moreover, it offers high power density, a well-integrated differential remote sense, and wide input-voltage range. This DC-DC switching regulator is current-limited with an adjustable current-limit and has soft-start, making it a robust and reliable solution for harsh applications.

Working Principles

The S-85S1AB30-I6T1U’s topology is based on a buck-boost configuration, combining a buck and a boost circuit into one unit. Buck-boost converters are appealing for several reasons, such as the fact that they do not require two transformers, and that their wide range of voltage regulation is well-suited for applications with a wide input range.

The basic principle of operation of a buck-boost converter is similar to that of a buck or a boost converter, but combines aspects of both. When the input voltage is higher than the output voltage, the converter operates as a buck converter. When the input voltage is lower than the output voltage, the converter operates as a boost converter. The difference makers are the two switching elements used in the control circuit, which allows the converter to operate in both directions.

The S-85S1AB30-I6T1U DC-DC switching regulator is protected against input voltage transients and features an integrated emergency shutdown feature and remote shutdown capabilities, providing valuable protection to your system. The regulator also provides open-circuit protection as well as over- and under-voltage protection. The integrated over-temperature protection and integrated programmable soft-start further increase the reliability of this DC-DC switching regulator.

In summary, the S-85S1AB30-I6T1U is an advanced DC-DC switching regulator designed for use in harsh applications, from industrial to military and from wind and solar renewable energy applications. It provides excellent dynamic load and line regulation and high power density, as well as excellent efficiency. Its integrated protection and adjustable limiting current make it a robust, reliable and safe solution for a variety of applications.

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