LTC3851IMSE/LTC3851EMSE - High Performance Step-Down Switching Regulator Controller

The LTC3851IMSE/LTC3851EMSE from Linear Technology is a high-performance, synchronous step-down DC/DC switching regulator controller that drives all N-channel power MOSFET stages. This advanced regulator features a constant frequency, current mode architecture that allows a phase-lockable frequency of up to 850kHz, making it ideal for a wide range of power supply designs.

Designed for precision, the LTC3851IMSE/LTC3851EMSE offers a 1.5% output voltage accuracy over a wide temperature range. This precision is maintained over a 4V to 38V input voltage range, ensuring its adaptability to a variety of input sources. The output voltage is adjustable from 0.8V to 24V, which makes the LTC3851IMSE/LTC3851EMSE versatile for a multitude of applications, from simple point-of-load conversions to more complex, multi-output and multi-phase configurations.

The LTC3851IMSE/LTC3851EMSE incorporates an optimal power stage topology that includes integrated output voltage sensing, which eliminates the need for an external sense resistor. This not only simplifies the design but also improves efficiency. Additionally, the device features a differential amplifier for true remote output voltage sensing, compensating for voltage drops due to PCB traces, ensuring accurate output voltage regulation.

Protection features of the LTC3851IMSE/LTC3851EMSE include overvoltage, overcurrent and over-temperature protection, ensuring safe operation under abnormal operating conditions. The device also provides a selectable shutdown option that can be triggered by an external signal, allowing for efficient power management in system-level applications.

The LTC3851IMSE is offered in a thermally enhanced MSOP-16 package, while the LTC3851EMSE is available in a 4mm x 3mm DFN-16 package. Both versions are RoHS compliant and are designed to meet the stringent requirements of complex and high-performance power systems.

Whether you are designing power supplies for data communication equipment, distributed power systems, or portable battery-powered devices, the LTC3851IMSE/LTC3851EMSE is an excellent choice for a reliable and efficient power management solution.