BD9S201NUX-CE2

Overview

The BD9S201NUX-CE2 is a single synchronous buck DC/DC converter manufactured by ROHM Semiconductor. It operates with an input voltage range of 2.7 V to 5.5 V and provides an adjustable output voltage from 0.8 V to 5.5 V. The device supports a maximum output current of 2 A and features a fixed switching frequency of 2.2 MHz. It is housed in an 8-pin VSON package (VSON008X2020) measuring 2.0 x 2.0 mm. The component is qualified under AEC-Q100 Grade 1 standards and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates low on-resistance power MOSFETs for high efficiency in a compact synchronous buck topology.
• Utilizes current-mode control architecture to achieve fast transient response performance.
• Includes built-in phase compensation circuitry to minimize the number of required external components.
• Provides comprehensive protection mechanisms including UVLO, SCP, OVP, and soft start functionality.

Applications

• Automotive infotainment systems
• Digital cockpit displays
• Sensor hub power management
• Body control modules

Procurement Notes

Verify the specific suffix CE2 against the official datasheet to confirm automotive qualification status and pinout compatibility. Ensure the ordering part number matches the exact tape and reel specifications required for your assembly process. Cross-reference the manufacturer's latest documentation for any updates regarding RoHS compliance or environmental declarations before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring a 2 A output capability within a 2.7 V to 5.5 V input window. The 2.2 MHz switching frequency allows for the use of smaller inductors compared to lower-frequency alternatives. Consider the VSON-8 package dimensions if board space is constrained. Verify that the application environment falls within the specified -40°C to +125°C operating temperature range.

Part Context

This device belongs to the BD9S series of switching voltage regulators designed specifically for automotive applications. The series shares common architectural features such as synchronous buck topology and integrated protection circuits. Variants within the family differ primarily in maximum output current ratings while maintaining similar input/output voltage ranges and packaging styles.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's official cross-reference tools or datasheets for potential equivalents based on specific electrical requirements.