BD9S100NUX-CE2

Overview

The BD9S100NUX-CE2 is a synchronous buck DC/DC converter from ROHM Semiconductor, classified under PMIC. It operates with an input voltage range of 2.7 V to 5.5 V and provides a single adjustable output ranging from 800 mV to 5.5 V. The device supports a maximum output current of 1 A and functions at a switching frequency of 2.2 MHz. It features a quiescent current of 350 uA and includes a shutdown function. The component is qualified to AEC-Q100 standards for automotive applications and operates within a temperature range of -40°C to +125°C. It is housed in an 8-UFDFN exposed pad package.

Feature Summary

• Integrated synchronous rectification for improved efficiency in step-down conversion
• Adjustable output voltage capability allowing flexible power rail configuration
• Automotive-grade qualification ensuring reliability under harsh environmental conditions
• Compact surface-mount packaging designed for space-constrained PCB layouts

Applications

• Portable electronic devices requiring efficient power management
• Industrial control systems utilizing regulated DC power supplies
• Automotive infotainment and instrumentation modules
• Battery-powered equipment needing extended operational life

Procurement Notes

Verify the specific ordering suffix and manufacturer part number against official ROHM documentation to ensure correct variant selection. Confirm that the requested quantity aligns with standard factory packaging specifications. Check for any recent product lifecycle changes or obsolescence notices directly from the manufacturer. Ensure compatibility with required thermal dissipation methods for the selected application environment.

Selection Notes

Choose this component when a single adjustable output with up to 1 A capacity is required within a 2.7 V to 5.5 V input window. The 2.2 MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the 350 uA quiescent current for battery-sensitive designs. Verify that the 8-UFDFN package footprint fits the target PCB design constraints.

Part Context

This part belongs to the BD9S series of switching voltage regulators by ROHM Semiconductor. It is categorized as a Power Management IC (PMIC) specifically designed for synchronous buck conversion. The series targets applications requiring high efficiency and compact form factors, often serving as primary voltage regulation stages in multi-rail systems.

Replacement Considerations

BD9S100NUX-C is listed as an alias for this part number. No other distinct substitute part numbers are confirmed in the provided data.