BD9S000NUX-CE2

Overview

The BD9S000NUX-CE2 is a single-channel synchronous buck DC/DC converter from ROHM Semiconductor, designed for automotive applications. It operates with an input voltage range of 2.7 V to 5.5 V and provides a positive adjustable output voltage between 0.8 V and 5.5 V. The device delivers a maximum output current of 600 mA at a fixed switching frequency of 2.2 MHz. It features integrated power MOSFETs and a controller within an 8-pin VSON package (VSON008X2020). The component is AEC-Q100 qualified and supports a junction temperature range from -40°C to +125°C.

Feature Summary

• Integrates low on-resistance power MOSFETs and control circuitry into a compact synchronous buck topology.
• Utilizes current-mode control architecture to achieve high transient response performance.
• Includes built-in phase compensation circuits to minimize the requirement for external components.

Applications

• Automotive electronic systems requiring AEC-Q100 qualified power management
• Portable devices needing efficient step-down conversion from 3.3V or 5V rails
• Embedded systems utilizing single-output DC/DC regulation

Procurement Notes

Verify the specific suffix CE2 against official ROHM documentation to confirm packaging type and automotive qualification status. Ensure compatibility with VSON008X2020 footprint requirements during PCB layout. Cross-reference datasheet revisions to confirm pinout consistency and thermal pad specifications before finalizing procurement orders.

Selection Notes

Select this component when a single-channel synchronous buck converter with 600 mA capacity is required for automotive environments. It is suitable for designs prioritizing small inductor size due to the 2.2 MHz switching frequency. Consider alternatives if higher output current exceeds 600 mA or if input voltages fall outside the 2.7 V to 5.5 V range.

Part Context

This part belongs to the BD9S000NUX series of ROHM's automotive-grade PMICs. It shares architectural similarities with other members like the BD9S111NUX and BD9S231NUX, differing primarily in output current ratings and fixed vs. adjustable voltage configurations. All variants utilize the same VSON-8 package and 2.2 MHz switching frequency.

Replacement Considerations

Direct substitutes include BD9S000NUX-C, which shares identical electrical characteristics but may differ in packaging format. Other family members such as BD9S111NUX-CE2 offer similar functionality with different output currents.