LT3959EFE#TRPBF

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The LT3959EFE#TRPBF is a budget-friendly, low-voltage, high-efficiency synchronous buck DC/DC switching regulator designed for buck regulator applications. It operates at a maximum input voltage of 5.25V, and its maximum switch current is 4A. It features an adjustable switching frequency up to 1.2MHz and a programmable dead-time to optimize efficiency. It also features integrated overcurrent protection and an adjustable soft-start. It is housed in a small 10-pin MSOP package and is suitable for applications requiring a small, highly efficient, low-output voltage power supply.

Application Field

The LT3959EFE#TRPBF is a great solution for a variety of space-limited applications requiring a powerful yet budget-friendly regulator. It can be used to power a variety of electronics, such as laptops, mobile phones, tablets, HDTVs, home theater systems, automotive electronics, wearables, and more. It is also suitable for use in battery-powered and charger-based applications, eliminating the need for a dedicated transformer.

Working Principle

The LT3959EFE#TRPBF DC/DC switching regulator works by controlling an oscillator that switches the power MOSFETs between states of conduction and non-conduction. This switching action creates a voltage step-down effect that is regulated in order to maintain a constant voltage across the output terminals. The regulator also adjusts the switching frequency in response to changes in the load in order to ensure that the output voltage remains stable. Additionally, it utilizes overcurrent protection in order to prevent over-heating of the MOSFETs, as well as a programmable soft-start feature to limit in-rush current during startup. The LT3959EFE#TRPBF offers a wide range of programmable dimensional parameters to customize the performance for the specific application.

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