LTC3890EUH#PBF - Dual Output Step-Down Synchronous Controller

The LTC3890EUH#PBF is a high-performance, dual-channel synchronous step-down switching regulator controller from Linear Technology, designed to manage power efficiently in a compact package. This versatile controller is capable of driving all N-channel power MOSFET stages, which can produce a dual output or can be configured to provide a two-phase single output, making it a flexible solution for a variety of power supply designs.

With its wide input voltage range of 4.5V to 60V, the LTC3890EUH#PBF is suitable for a broad array of applications, from automotive to industrial and telecommunications systems. It can operate with a quiescent current of only 50uA in sleep mode, ensuring energy efficiency even when the system is in standby or low-power states.

The LTC3890EUH#PBF features a powerful 1.1Ω on-chip gate drivers, which provide the ability to drive large power MOSFETs, thereby reducing switching losses and improving overall system efficiency. The device offers a selectable fixed frequency from 50kHz to 900kHz or can be synchronized to an external clock signal in the same range, giving designers the flexibility to optimize the switching frequency as per their specific design requirements.

Additional features of the LTC3890EUH#PBF include phase-lockable frequency modulation (PLL), which helps to minimize noise and interference in noise-sensitive applications. The device also provides a TRACK/SS pin for each channel, allowing for the tracking of supply voltages or programmable output voltage ramp-up, which is critical for sequencing power rails in complex systems.

Protection features are also robust on the LTC3890EUH#PBF, including overvoltage, overcurrent, and over-temperature protection, ensuring the reliability and longevity of the end application. The current mode operation provides excellent line and load transient response.

Supplied in a 5mm x 5mm QFN package, the LTC3890EUH#PBF is designed to minimize the footprint on the PCB and reduce the need for additional external components, making it an ideal choice for space-constrained applications. The combination of its feature set and compact form factor makes the LTC3890EUH#PBF a powerful and versatile solution for your dual output or two-phase power supply needs.