LM3525MX-H

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Power Management Integrated Circuits (PMICs) play an increasingly important role in the realization of today’s complex, intelligent and power-efficient electronics solutions. PMICs integrate a variety of power management functions and provide the interface between the battery, the power source and the various controlling devices. One specific example of a Power Distribution Switch and Load Driver PMIC is the LM3525MX-H.

This power management IC is a true DC/DC converter with integrated power-switching capabilities, which are based on MOSFET (metal-oxide semiconductor field-effect transistor) technology. The IC provides the load current or sources the current to the load, helping to control the power levels used in the target system. It can operate in both step-down (Buck) or step-up (Boost) modes and can provide positive or negative current, depending on the needs of the system.

The LM3525MX-H is specifically designed for high-voltage applications (>20V) and has an internal power supply range of 8-20V. Its operating frequency can extend up to 10MHz, making it well suited for high-power designs. Furthermore, it features a low on-resistance FET switch with a typical RDS(ON) of 0.175Ω, allowing it to handle up to 7A of continuous load current.

The LM3525MX-H can be configured for either synchronous or non-synchronous buck operation. In synchronous mode, the FET switch is directly driven by its own internal oscillator, providing good efficiency and improved thermal performance. In non-synchronous mode, the device can be synchronized to an external clock or other control signal.

In addition to these features, the LM3525MX-H also provides a current limit (ILIM) setting to protect the FET and the load from over-current. It also has a built-in soft-start circuit and a thermal shutdown circuit, which protect the device in case of overload or over-temperature. Finally, a programmable frequency modulation (PFM) mode allows it to reduce the operating frequency when the output voltage is above a certain threshold, resulting in improved efficiency at light load conditions.

Overall, the LM3525MX-H is an ideal solution for high-voltage applications, thanks to its high current-handling capability, low RDS(ON) and programmable frequency modulation mode. Its multi-mode operation and high frequency operation extend the flexibility and the performance-oriented features of the device, making it well suited for a wide range of high-current applications, including power rails, battery charging, voltage or current shifting and motor control.

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