LT3782EFE#PBF

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The LT3782EFE#PBF integrated circuit from Linear Technology is an incomplete device that requires external components for requisite circuit functionality. As such, it is part of the Power Management Integrated Circuit (PMIC) family and falls within the Voltage Regulator and DC DC Switching Controller class. This device is a wide programmable integrated circuit (IC) synchronous step-down converter available in a 10-lead 3x3mm DFN package that operates at higher switching frequencies to provide efficient power conversion in various applications.

The LT3782EFE#PBF is designed to offer solutions to industry needs, allowing it to be leveraged in a variety of scenarios such as in energy-efficient isolated and non-isolated DC-DC switching power supplies, LED applications, automotive, industrial and space applications, thanks to its key features of space savings, scalability, system flexibilty and efficiency.

The LT3782EFE#PBF employs a 3.2MOS architecture with a synchronous buck controller and a low-dropout (LDO) voltage detector, which operate from a wide supply range spanning from 2.8 V to 20 V. The synchronous buck controller is designed to operate at higher switching frequencies with lower losses from a high-side power MOSFET up to 20V and a low-side power MOSFET to the output voltage rail. The LDO voltage detector is precision-programmable, temperature-compensated and is operable with an output voltage range as low as 0.8V.

Apart from its main topology, the LT3782EFE#PBF integrates a wide array of protection functions and allows robust performance including an Enhanced Load Current Limit (ELCL) feature, typical efficiencies of over 90%, and light load efficiencies of more than 80%. The ELCL offers over current protection, preventing output overload. The LDO voltage detector precision of the LT3782EFE#PBF ensures adequate accuracy over its whole range, and its pin protection design enables it to be used in noisy environments.

In its normal operating mode, the LT3782EFE#PBF accepts input voltage up to the selected Vin max and produces a tightly regulated output voltage, Vout. When the output voltage exceeds a programmable overvoltage threshold, the LT3782EFE#PBF shuts down the switching regulator and sets the output to the selectable overvoltage threshold. The overvoltage/overcurrent threshold can be programmed with two external resistors on overvoltage pin. As long as the input voltage remains within the specified limits, the output stays at the programmed overvoltage threshold and the IC remains in the overvoltage lockout mode.

The LT3782EFE#PBF has a low quiescent current of 7 µA and delivers up to 5 A of continuous output current with a minimum 6 µA operating current. It also features an overcurrent limit provides protection against output overload, overvoltage protection and over temperature protection, as well as an open drain fault output providing a visual indication on the status of the IC. In addition, the LT3782EFE#PBF’s fixed-frequency PWM operation enables it to maintain efficiency even in discontinuous conduction mode, allowing it to meet or exceed Energy Star efficiency requirements and extending the operating temperature range to 150°C.

In conclusion, the LT3782EFE#PBF is a high-performance, flexible and feature-packed power management IC. With its wide range of programmability, it is a great choice for applications requiring small size and lower cost. Whether you are looking for efficiency, accuracy, or just a reliable system, the LT3782EFE#PBF offers a good solution.

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