LT3957IUHE#PBF

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Voltage regulators are essential for providing a stable steady power supply for electronic devices. In particular, DC-DC switching regulators are used in a variety of applications, from consumer IoT devices to electric vehicles. The LT3957IUHE#PBF device is one such component, and it provides efficient, highly regulated outputs ranging from 3.3V to 28V, with a maximum power output of 20W without heat sink and up to 32W with heat sink.

The LT3957IUHE#PBF is designed as a high-efficiency, high-output buck-boost regulator that operates at a nominal input of 5V. Its design allows it to convert a wide input voltage range of 4.5V to 28V into a lower output voltage. It also features two adjustable power stages, which allow for increased efficiency over a greater output power range and improved transient response. Furthermore, it includes a wide range of built-in protection functions, such as overvoltage, undervoltage, overcurrent, and overtemperature protection.

The LT3957IUHE#PBF consists of two stages – an input section and an output section. The input section includes a buck-boost converter, consisting of a high-efficiency power switching circuit, control logic, and a voltage loop control. The buck-boost converter performs the input voltage conversion to the required output voltage. The output section includes a low-side synchronous MOSFET, a precision reference voltage, and a voltage loop control. It is responsible for the final voltage regulation and stable output power.

The LT3957IUHE#PBF’s two-stage conversion ensures high efficiency and high-load regulation when powering a variety of applications. It features programmable output current and voltage control, along with adjustable output voltage slew rate, which can be tailored to meet the needs of specific applications. Moreover, the device features one of the lowest quiescent currents of any comparable device, allowing for maximum battery life.

The LT3957IUHE#PBF is ideal for a wide range of applications where efficient and low-noise power supply is required. It is suited for applications such as communication battery-operated systems, LED drivers, mobile device charging, and automotive systems. Additionally, since it operates with no heat sink and a maximum output power of 20W, the LT3957IUHE#PBF is particularly suitable for applications requiring limited board space and low profile.

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