LTC3861EUHE#PBF - Dual Output Step-Down DC/DC Controller

The LTC3861EUHE#PBF is a high-performance, dual output synchronous step-down DC/DC controller designed by Linear Technology. It is specifically engineered to drive all N-channel power MOSFET stages, which makes it a versatile choice for a variety of demanding applications. With its wide input voltage range of 4.5V to 38V, the LTC3861 is suited for systems that operate from a variety of input sources including automotive batteries, industrial supplies, and distributed power systems.

This controller integrates a precision voltage reference and an oscillator with a selectable frequency range from 50kHz to 900kHz, which can also be synchronized to an external clock signal within the same range. This feature allows for flexibility in optimizing the performance of the power supply with respect to efficiency, component size, and operational noise.

The LTC3861 features a phase-lockable frequency of up to 425kHz, providing a stable operation even in the most challenging conditions. It includes a powerful 1.1Ω onboard all N-channel gate driver that ensures efficient power handling capabilities and minimized switching losses, leading to higher efficiency and reduced heat generation.

To ensure the protection of the system, the LTC3861EUHE#PBF comes with a range of safety features. These include overvoltage, undervoltage, and overcurrent protection. The current mode operation provides excellent line and load transient response, while the adjustable current limit function allows for precise control over the maximum output current, thereby safeguarding the power supply and the load from potential damage.

The LTC3861EUHE#PBF is available in a 5mm × 5mm QFN-36 package, making it compact enough for space-constrained applications without compromising on performance. Its advanced design and robust feature set make it an ideal solution for dual output power supplies in automotive, industrial, and telecommunications equipment, as well as in datacom applications.

With its combination of performance, flexibility, and protection features, the LTC3861EUHE#PBF from Linear Technology stands out as a reliable and efficient solution for modern power supply designs.