LM43602DSUT

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The LM43602DSUT is a dual synchronous DC-DC switching regulator, grown out of Texas Instruments’ Powerstage family. It is intended to provide power conversion in today’s demanding and fast-paced industrial systems, where performance and availability are paramount. It features an efficient, robust design and low standby current. This makes it ideal for a wide range of applications in embedded, industrial and communications markets, with the ability to adjust step-down and step-up output voltage configurations.

This integrated solution is intended to facilitate the design of high efficiency, very low EMI, power-over-Ethernet (PoE) systems, providing dual isolated inputs and ultra-low dropout operation. Operating over an input voltage range of 4.5V to 15V, and output voltages of 1.8V to 18V, this integrated device makes a great substitute for discrete power supplies, needing fewer components and less board space. It is capable of delivering 24W of power into a 2-phase paralleled buck configuration and 18W into a 2-phase paralleled boost configuration. Ultimately, it simplifies the design process, allowing engineers to concentrate on other aspects of the design.

Working Principle

The LM43602DSUT synchronous DC-DC switching regulator employs two stages of conversion of voltage from the input to the output in its design. During the first stage, the regulator is a buck converter, meaning it takes in the power at one voltage level and reduces it to a lower level to produce the required output voltage setpoint. During the second stage, the regulator uses a boost converter to increase the power from the input voltage at the setpoint to the output voltage. A buck-boost converter is also available with the LM43602DSUT, which is a switching regulator that can step down or step up the voltage as required. This dual mode operation allows the LM43602DSUT to be used in a range of applications.

The LM43602DSUT is a highly efficient switching regulator that offers greater power density than is normally achievable with linear regulators. The LM43602DSUT also offers better noise immunity, because switching frequencies are generally higher than linear frequencies. It also has a lower component count than a linear regulator because of its synchronous design, meaning there is no need for an inductor or transformer. The switching regulator is able to run at higher output currents and is capable of simultaneously converting two isolated power domains, with the same input voltage. Additionally, the device has a low standby current of less than 1m for both channels, which reduces its overall power consumption.

Applications

The LM43602DSUT DC-DC switching regulator is an ideal solution for a wide range of applications, including but not limited to PoE applications, such as midspans and end-point PDs; automotive systems such as body electronics, motor control and cluster/dashboards; and industrial applications such as industrial motorsprt drives, power supplies and energy meters. In automotive applications, the LM43602DSUT is a reliable and efficient solution for engine control, body control and cluster/dashboards. It can provide high power delivery and isolation with low dropout to keep the system running smoothly and efficiently. In industrial applications, the LM43602DSUT is well-suited for motor speed and motor control systems, as well as power supplies and energy meters. With its high-efficiency and dual mode operation, the device is highly integrated and cost-effective solution for these types of applications.

Additionally, the LM43602DSUT has a variety of features designed to streamline the design process and make the device more secure and reliable. These features include an external control logic, which provides a reliable and secure mechanism for controlled power cycling; programmable output voltage, allowing engineers to adapt the device to different operational demands; and robust fault protection, which protect from overcurrent, overvoltage and undervoltage conditions with advanced soft-start, forced continuous and pulse-skipping modes.

By offering an efficient and reliable switching regulator, the LM43602DSUT is an ideal solution for a wide range of applications, offering a cost-effective and highly integrated solution. With its dual mode operation and advanced fault protection, the device is able to provide reliable power and enhanced performance in various demanding environments.

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