**LT8365EMSE#TRPBF: A Comprehensive Guide to the 60V, 2A Synchronous Boost/SEPIC/Inverting Converter**

The **LT8365EMSE#TRPBF** from Analog Devices is a highly versatile and robust monolithic switching regulator that stands out in the realm of DC/DC conversion. This IC integrates two internal **60V, 2A power switches** and control logic within a single MSOP-16 package, enabling the design of highly efficient and compact power supplies for a wide array of industrial, automotive, and telecommunications applications.

At its core, the LT8365 is a **current mode step-up (boost) converter**, but its true power lies in its architectural flexibility. It can be readily configured to operate not only in boost mode but also in **SEPIC (Single-Ended Primary-Inductance Converter)** and **inverting (buck-boost)** topologies. This multi-topology capability allows a single IC to address diverse voltage conversion needs—stepping up a voltage, generating a negative output from a positive input, or providing an output that can be above or below the input voltage—all with minimal external component changes.

A key to its performance is the **synchronous rectification** provided by the internal switches. This feature significantly enhances conversion efficiency by reducing the power loss typically associated with an external Schottky diode. The result is higher efficiency, especially at lower output currents, and a reduction in the overall solution size and thermal management requirements. The device operates across a wide **input voltage range of 2.8V to 60V**, making it exceptionally resilient to high voltage transients and suitable for harsh electrical environments like 48V automotive systems or industrial power buses.

The switching frequency is user-programmable from **200kHz to 2MHz** via a single resistor. This allows designers to optimize their design for either highest efficiency (by choosing a lower frequency) or the smallest solution size (by using a higher frequency to shrink passive components). Furthermore, the LT8365 features a **programmable soft-start** function to mitigate inrush current during startup, and its frequency synchronization pin allows it to be synchronized to an external clock to avoid beat frequencies in noise-sensitive applications.

Designing with the LT8365 requires careful attention to layout and component selection. For a stable boost converter, the choice of inductor, output capacitor, and feedback network is critical. For SEPIC and inverting configurations, the selection of the coupling capacitor (for SEPIC) and the operating duty cycle calculations become paramount. The device's datasheet provides extensive guidance and formulas to streamline this process.

**ICGOOODFIND:** The LT8365EMSE#TRPBF is an **exceptional and flexible power conversion solution** for engineers facing demanding voltage requirements. Its unique combination of **high input voltage tolerance**, **multi-topology support**, and **highly integrated synchronous architecture** makes it an indispensable component for advanced power systems where reliability, efficiency, and space constraints are critical.

**Keywords:** Synchronous Boost Converter, SEPIC Topology, Inverting Converter, 60V Power Switch, Programmable Frequency.