LTC7891RUFDM#PBF

DC DC Switching Controllers Overview

The LTC7891RUFDM#PBF is a single-channel, high-performance synchronous buck DC-DC controller designed to drive all N-channel synchronous Gallium Nitride (GaN) field-effect transistor power stages from input voltages up to 100V. It features a wide VIN range of 4V to 100V and supports output voltages from 0.8V to 60V. The device operates with a programmable switching frequency between 100kHz and 3MHz. It utilizes a 28-pin, 4mm x 5mm side-wettable QFN package.

DC DC Switching Controllers Feature Summary

• Optimized GaN driver technology eliminates the need for catch, clamp, or bootstrap diodes
• Internal smart bootstrap switch prevents overcharging of the high-side driver supply during dead time
• Internally optimized near-zero dead time or resistor-adjustable dead time for high efficiency
• Separate output gate drivers allow adjustable turn-on and turn-off drive strength

DC DC Switching Controllers Applications

• Compact distributed power systems in humanoid robots powered by 48V lithium batteries
• Industrial power systems
• Military avionics and medical systems
• Telecommunications power systems

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when reviewing official documentation. Confirm the package type matches the required 28-QFN footprint. Ensure the design accommodates the specified 4V to 100V input range. Check for any RoHS directives applicable to the final assembly.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring high-voltage input handling with GaN FETs. It is suitable where space constraints favor a small 28-pin QFN package. Consider its low IQ and programmable frequency for efficiency optimization. Verify compatibility with the target GaN FET logic levels using the adjustable driver voltage.

DC DC Switching Controllers Part Context

This part belongs to the LTC7890/LTC7891 family of synchronous buck controllers. While the LTC7890 offers dual channels in a larger 40-pin package, the LTC7891 provides a single-channel solution in a more compact form factor. Both share similar GaN-optimized driver technologies and input voltage capabilities.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.