NCV8851BDBR2G

Overview

The NCV8851BDBR2G is an automotive-grade dual synchronous buck and linear regulator controller manufactured by onsemi. It integrates a high-frequency current-mode buck converter with a low-noise LDO in a single package. The device operates within a supply voltage range of 4.5V to 36V, supporting flexible input power configurations for automotive applications. It features a switching frequency up to 575kHz, enabling the use of compact external components. The integrated LDO provides clean power for sensitive analog loads, while the buck section delivers efficient step-down conversion. Designed for robust performance, it includes comprehensive protection mechanisms such as overcurrent, thermal shutdown, and undervoltage lockout.

Feature Summary

• Integrates a synchronous buck converter and a low-dropout linear regulator (LDO) for combined efficiency and noise reduction.
• Automotive qualification compliant with AEC-Q100 standards for reliability in harsh environments.
• Supports wide input voltage ranges suitable for various automotive power bus architectures.
• Includes built-in protection features like thermal shutdown and current limiting for system safety.

Applications

• Infotainment systems requiring stable power rails for audio and video processing.
• Instrument clusters needing isolated or regulated power for displays and sensors.
• Body control modules managing multiple electronic sub-systems.
• ADAS sensor interfaces requiring low-noise power supplies for signal integrity.

Procurement Notes

Verify the specific suffix 'BDBR2G' against the official datasheet to ensure correct pinout and packaging configuration. Confirm AEC-Q100 compliance requirements match your design specifications. Check for recent Product Change Notifications (PCN) regarding manufacturing site changes or material updates. Ensure compatibility with your PCB footprint for the TSSOP-20 package. Validate that the supplier provides genuine onsemi parts with traceable lot codes.

Selection Notes

Select this component when a design requires both high-efficiency DC-DC conversion and low-noise linear regulation in a compact form factor. It is suitable for applications where board space is limited but multiple power rails are necessary. Consider its automotive rating if operating in vehicles. Evaluate the thermal performance under maximum load conditions. Compare its switching frequency capabilities with other controllers to optimize inductor size and EMI characteristics.

Part Context

This part belongs to the NCV8851 family of dual-channel regulators from onsemi. The family is designed specifically for automotive electronics, offering integrated solutions to reduce bill of materials and board area. Similar parts in the series may vary in output current ratings or package types. The NCV8851 series addresses the trend toward higher integration in modern vehicle electronic control units.

Replacement Considerations

Direct substitutes include other NCV8851 variants with different suffixes for package or temperature grade adjustments. Cross-reference with NCV8852 series for similar functionality but potentially different pinouts. Verify electrical parameters and pin compatibility before substitution. Consult onsemi documentation for approved replacement lists.