LM5085MYE/NOPB

DC DC Switching Controllers Overview

The LM5085MYE/NOPB is a wide input voltage, constant on-time, non-synchronous buck switching controller from Texas Instruments. It supports an input voltage range of 4.5 V to 75 V and delivers up to 1.75 A of output current. The device operates at a fixed switching frequency of 1 MHz with a maximum duty cycle of 100%. It features an adjustable output voltage range from 1.25 V to 75 V and includes integrated protection mechanisms such as cycle-by-cycle current limiting and thermal shutdown. Designed for surface-mount installation in an MSOP-PowerPad-8 package, it functions within a temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Constant on-time control architecture enables stable operation across wide input voltage variations without requiring external compensation networks.
• Integrated high-side PFET driver simplifies design by eliminating the need for external bootstrap circuits or level shifters.
• Fixed 1 MHz switching frequency allows for the use of small passive components while maintaining efficient power conversion.
• Comprehensive protection suite includes cycle-by-cycle current limiting, thermal shutdown, and undervoltage lockout for reliable system performance.

DC DC Switching Controllers Applications

• Industrial point-of-load regulation
• Automotive electronics systems
• Distributed power architectures

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'MYE' against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the component meets AEC-Q100 qualification requirements if intended for automotive applications. Cross-reference the ordering part number with the latest Texas Instruments documentation to avoid discrepancies between legacy and updated revisions.

DC DC Switching Controllers Selection Notes

Select this controller when a wide input voltage range up to 75 V is required alongside a compact solution. The constant on-time topology is suitable for designs prioritizing simplicity and stability over variable frequency modulation. Consider the 1 MHz frequency trade-off between component size and efficiency. Verify that the external PFET selection aligns with the controller's drive capabilities and thermal requirements.

DC DC Switching Controllers Part Context

This component belongs to the LM5085 family of wide input voltage buck controllers. It shares architectural similarities with the LM25085 but offers extended input voltage support up to 75 V. The MYE variant denotes a specific tape and reel packaging configuration within the MSOP-PowerPad-8 footprint, distinguishing it from tube-packaged versions like the MYX.

DC DC Switching Controllers Replacement Considerations

LM5085MYX/NOPB: Pin-compatible alternative with identical electrical characteristics but different packaging format (tube vs. tape and reel). LM5085QMYE/NOPB: Automotive qualified version with AEC-Q100 certification, suitable for harsh environments.