LM2673SX-5.0 Integrated Circuits (ICs)

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LM2673SX-5.0 is a simple switch-mode DC/DC regulator, designed to convert a high voltage DC source down to a lower voltage regulated level.It is not only small, efficient, and low cost, but also, unlike many other converters, is designed with the goal of simplicity. Its intellectual property enables the user to design a high efficiency dc/dc converter with minimal external components. This makes the LM2673SX-5.0 an ideal choice for many applications, including automotive audio systems, telecommunication systems, and datacom applications.

The LM2673SX-5.0 is a three terminal, adjustable, self-contained step-down switching regulator. It has a wide output voltage range from 0.6 V to 5 V range, and can provide up to 300 mA continuous output current. It includes both Power ON/OFF control and enable function. It also includes several protection modes such as overload, overtemperature and short-circuit protections. The LM2673SX-5.0 is available in a small footprint 8-lead shrink Small Outline Package (TSOP) and is designed to operate over a wide input voltage range.

Working Principle: The LM2673SX-5.0 utilizes a switching converter topology. It features a Pulse Frequency Modulated (PFM) current mode control architecture. The main feature of the chip is that the core of the chip is a 0.7V Buck Switch, which provides maximum power conversion efficiency. It also features gate drive with synchronous rectifier, and operating frequency up to 1.2MHz with low-noise switching. The chip can be set up for either forced PFM or auto PFM mode using the MODE pin. In auto PFM mode, the inductor current limit sets the switching frequency that adjusts automatically to the load current.

Applications: The LM2673SX-5.0 is well-suited for a wide range of applications, such as automotive audio systems, telecommunication systems, and datacom applications. It can be used to generate multiple power supplies over a wide input voltage range, including in vehicles and during battery operation. The chip is very efficient with high output current capability and low standby current, making it suitable for a variety of power applications including Motor Driver Units, Portable Applications, and a wide range of industrial applications.

In summary, the LM2673SX-5.0 is a versatile 3-terminal step-down switching regulator that is capable of providing up to 300mA of continuous output current with improved transient response for any application. It includes an internal high voltage synchronous rectifier, as well as various protection modes, to provide the user with an efficient and reliable power solution.

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