LT3570EUF#PBF

Overview

The LT3570EUF#PBF is a monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. It integrates high-side and low-side N-channel power MOSFETs into a single package, eliminating the need for external Schottky diodes or bipolar transistors. The device operates with an input voltage range of 2.7V to 60V and delivers up to 1A of output current. It features a fixed internal switching frequency of 500kHz, selectable via an external resistor. The regulator includes precision current limit, thermal shutdown, and soft-start functionality. Output voltage adjustment is achieved through an external resistor divider. The component is housed in a 24-lead QFN package rated for operation between -40°C and 125°C.

Feature Summary

• Integrated synchronous rectification with internal high-side and low-side N-channel MOSFETs
• Wide input voltage operating range supporting 2.7V to 60V sources
• Fixed 500kHz switching frequency architecture for compact passive component selection
• Built-in protection mechanisms including thermal shutdown and programmable current limit

Applications

• Industrial point-of-load regulation
• Battery-powered equipment power management
• Distributed power supply architectures
• Automotive always-on systems

Procurement Notes

Verify the specific suffix designation against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure that the procurement channel provides traceability documentation consistent with Analog Devices quality standards. Confirm package marking codes match the intended revision level before integration into production designs.

Selection Notes

Select this component when a robust, high-voltage capable buck converter is required without external gate drive complexity. The integrated MOSFET design simplifies layout and reduces bill of materials compared to controller-based solutions. Consider the 500kHz fixed frequency for standard inductor sizing requirements and evaluate thermal performance based on the expected load current and ambient conditions within the target enclosure.

Part Context

This part belongs to the LT3570 family of synchronous step-down regulators designed for high-voltage applications. It serves as a complete power solution by combining control logic, drivers, and power switches in one unit. The series is characterized by its ability to handle wide input ranges while maintaining efficiency and stability across varying load conditions.

Replacement Considerations

Consult official cross-reference data for direct pin-compatible alternatives from Analog Devices or other manufacturers. Verify that any substitute matches the 60V maximum input rating, 1A current capability, and 24-lead QFN package dimensions to ensure mechanical and electrical interchangeability.