PMIC - Voltage Regulators - DC DC Switching Controllers

The LT3758AHMSE#TRPBF is a high-performance DC-DC switching controller designed for synchronous step-down applications. It uniquely offers a combination of control, robustness, and efficiency, making it suitable for a wide range of applications. One of the key features of the LT3758AHMSE#TRPBF is its ability to provide multiple input voltage ranges for tight supply voltages, making it versatile and capable of handling a wide range of input sources. The LT3758AHMSE#TRPBF can operate from as low as 0.7V to as high as 6V and can accommodate input voltage possibilities from 0.7V to 16V with ease.

Application Field

The LT3758AHMSE#TRPBF is generally used for powering point-of-load applications and can be used for automotive applications as well. It is suitable for applications that require high efficiency, high-speed transient response, strong ESD performance, high reliability, and small footprint. Thanks to its ability to accurately measure input voltage and adjust the output voltage, it offers excellent load regulation performance.

In addition to automotive applications, the LT3758AHMSE#TRPBF is also suitable for applications requiring the control, monitoring, and protection of various electrical devices, such as solar microinverters, home and network appliances, LCD displays and televisions, computer components, battery-powered products, and healthcare products. Furthermore, thanks to its wide temperature range, the LT3758AHMSE#TRPBF can also be used in temperature-critical appliances such as microwave ovens and refrigerators.

Working Principle

Under normal operations, the LT3758AHMSE#TRPBF works by monitoring the resistance of the series PNP current-sense transistor for load current. When the current in the PNP device is greater than the reference current, the output is turned off. When the current is below the reference current, the controller turns on the output voltage. When the output voltage approaches the reference voltage, the device turns off the output.

The LT3758AHMSE#TRPBF also features programmable switching frequency, allowing the user to tailor the device\'s frequency to match the application requirements. In addition, it has an integrated 5-bit current limit that can be programmed with external resistors to adjust the peak current limit to the desired level. The device also offers thermal shutdown protection, overvoltage protection, and reverse current protection.

The LT3758AHMSE#TRPBF also offers two internal enable pins that allow the user to prevent output voltage from exceeding the programmed V_ref. This feature is especially helpful for applications where remote programming or manual settings are required. The device also features over temperature warning and protection, making it suitable for use in environments where higher temperature levels are expected.

Conclusion

The LT3758AHMSE#TRPBF high-performance DC-DC switching controller is suitable for a wide range of applications and offers an ideal combination of control, robustness, and efficiency. It features programmable switching frequency and adjustable peak current limit, enabling it to accommodate various input sources with ease. In addition, it offers two internal enable pins and various protection functions, making it suitable for temperature-critical applications such as microwave ovens and refrigerators. The LT3758AHMSE#TRPBF is an ideal choice for point-of-load and automotive applications requiring high efficiency and reliability.