LM25085ASDX/NOPB

DC DC Switching Controllers Overview

The LM25085ASDX/NOPB is a non-synchronous buck switching controller from Texas Instruments. It operates with an input voltage range of 4.5V to 42V and supports output voltages from 900mV to 42V. The device features a fixed 1MHz switching frequency and delivers up to 1.75A of drive current. It utilizes a constant on-time control architecture for rapid transient response. The component is housed in an 8-WSON (3x3) package and functions within a junction temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Constant on-time control architecture enables fast transient response without requiring external compensation networks.
• Integrated high-side power switch driver capable of delivering up to 1.75A peak current.
• Wide input voltage operating range supports direct connection to standard bus voltages.
• Fixed 1MHz switching frequency allows for the use of small passive components.

DC DC Switching Controllers Applications

• Industrial point-of-load regulation
• Automotive infotainment systems
• Telecommunications equipment power distribution

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'ASDX' against the manufacturer's official datasheet to confirm the exact package type and tape-and-reel specifications. Ensure compatibility with the target PCB footprint, as the WSON-8 package requires precise soldering techniques. Confirm RoHS compliance status through the latest product migration notices before finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this controller when a compact solution is required for wide-input buck applications. The constant on-time topology simplifies design by eliminating stability compensation issues common in voltage mode control. Consider the 1.75A drive capability for driving external MOSFETs efficiently at 1MHz frequencies while maintaining low quiescent current operation.

DC DC Switching Controllers Part Context

This component belongs to the LM25085A family of non-synchronous buck controllers. It shares architectural similarities with the LM25085 but offers optimized performance characteristics for modern power management needs. The series is designed to replace older generation controllers in space-constrained industrial and automotive designs requiring robust transient performance.

DC DC Switching Controllers Replacement Considerations

Direct pin-to-pin replacements include the LM25085MM/NOPB and LM25085AMMX/NOPB. Verify that the substitute part matches the required input voltage range and switching frequency. Ensure the replacement package variant aligns with existing board layout constraints and thermal requirements.