DA9131-XXRT1-AT

Overview

The DA9131-XXRT1-AT is a dual-channel step-down DC/DC converter from the Renesas DA9131 series, designed for high-efficiency power delivery in automotive and industrial applications. It features integrated switching FETs capable of delivering 5A per channel with an input voltage range of 2.5V to 5.5V and an adjustable output voltage range of 0.3V to 1.9V. The device operates at a nominal switching frequency of 4MHz and includes I2C-compatible interface control. It provides ±1% static accuracy and ±5% dynamic accuracy, ensuring stable performance under varying load conditions.

Feature Summary

• High-efficiency dual-channel buck conversion with integrated switches
• I2C-compatible programmable interface for configuration and monitoring
• Advanced protection mechanisms including overvoltage, undervoltage, and thermal shutdown

Applications

• Automotive infotainment systems
• Advanced Driver Assistance Systems (ADAS)
• Telematics units
• Navigation systems

Procurement Notes

Verify the specific suffix 'AT' against official Renesas documentation to confirm tape-and-reel packaging and temperature grade specifications. Ensure compatibility with required I2C addresses and output voltage configurations before integration. Confirm availability status as supply constraints may apply to this specific variant.

Selection Notes

Select this component for designs requiring compact footprints and high current density in low-voltage domains. The integrated FETs eliminate external Schottky diodes, reducing BOM complexity. Ensure inductor selection matches the 4MHz switching frequency for optimal efficiency and size reduction.

Part Context

Part of the DA9131 family of flexible sub-PMICs, enabling tailored power solutions for automotive systems. The series supports scalable architectures with standardized interfaces, facilitating design reuse across different vehicle platforms and processing requirements.

Replacement Considerations

Consult official substitution lists for equivalent dual-channel buck converters with similar current ratings and package dimensions. Verify pinout compatibility and electrical parameter alignment before considering alternative part numbers.