BD9S231NUX-CE2

Overview

The BD9S231NUX-CE2 is a single-channel synchronous buck DC/DC converter IC designed for automotive applications, qualified under AEC-Q100 Grade 1 standards. It accepts an input voltage range of 2.7V to 5.5V and delivers a maximum output current of 2A. The adjustable output voltage spans from 0.8V to the input voltage limit. Operating at a switching frequency of up to 2.2MHz, it supports compact external component designs. The device functions within an ambient temperature range of -40°C to +125°C and is housed in an 8-pin VSON package measuring 2.0mm x 2.0mm with a thickness of 0.6mm.

Feature Summary

• Integrates low on-resistance power MOSFETs for efficient synchronous rectification.
• Employs current mode control architecture to ensure high-speed transient response performance.
• Includes built-in phase compensation circuitry to minimize required external components.
• Features comprehensive protection mechanisms including short circuit, overvoltage, and thermal shutdown.

Applications

• Automotive electronic control units requiring robust power management
• Infotainment systems and display driver power supplies
• Sensor interface circuits in vehicle networks
• General automotive embedded processing modules

Procurement Notes

Verify that the specific part number suffix matches the required automotive grade qualification. Confirm the package type corresponds to the design layout requirements. Ensure compatibility with the intended input voltage profile and load current demands before integration. Check for functional safety support documentation if used in safety-critical subsystems.

Selection Notes

Select this component when a single channel capable of delivering 2A is required for automotive environments. It is suitable for designs prioritizing small footprint due to the high switching frequency capability. Consider the adjustable output feature if fixed voltage variants do not match system rails. Evaluate the thermal performance within the specified operating temperature range.

Part Context

This device belongs to the BD9S series of ROHM Semiconductor, which focuses on automotive-grade power management solutions. The series utilizes Nano Pulse Control technology to achieve high step-down ratios and system miniaturization. These converters are engineered to meet the rigorous reliability and environmental standards mandated by the automotive industry.

Replacement Considerations

BD9S201NUX-CE2 offers similar topology but with reduced output current capacity. BD9S110NUX-CE2 provides lower current output with fixed voltage options. Verify pinout compatibility and electrical specifications when substituting with other members of the BD9S family or alternative manufacturers' automotive buck converters.