DA9131-XXRT1

Overview

The DA9131-XXRT1 is a dual-channel step-down DC/DC converter from the Renesas DA9131 series, designed for high-efficiency power delivery in compact systems. It features integrated switching FETs capable of delivering 5A per channel, with an input voltage range of 2.8V to 5.5V and adjustable output voltages from 0.3V to 1.9V. The device operates at a nominal switching frequency of 4MHz, utilizing I²C-compatible FM+ interface for configuration. It includes programmable GPIOs, soft-start, and comprehensive protection features such as overvoltage, undervoltage, and overtemperature safeguards.

Feature Summary

• Dual-channel buck architecture with fully integrated switching FETs eliminates external components
• I²C-compatible FM+ interface enables precise digital control and monitoring
• Programmable GPIOs support flexible system integration and status indication
• Advanced safety mechanisms include dynamic voltage control and multi-step thermal protection

Applications

• High-performance mobile processors requiring efficient core voltage regulation
• Memory subsystems needing stable low-voltage power rails
• Automotive infotainment and telematics systems
• Advanced Driver Assistance Systems (ADAS) processing units

Procurement Notes

Verify exact output voltage configurations against the specific suffix code, as the XX placeholder indicates customizable parameters. Confirm package type and reel/tray specifications with the manufacturer or authorized distributors prior to ordering. Ensure compatibility with existing I²C bus addresses and GPIO mappings in the target design. Check for moisture sensitivity levels and reflow soldering profile requirements during assembly planning.

Selection Notes

Select this component when designing systems that demand high current density in a minimal footprint. The integrated FETs reduce bill of materials by removing external Schottky diodes. Consider the 4MHz switching frequency for smaller passive components compared to lower-frequency alternatives. Ensure the application environment stays within the specified temperature range for optimal efficiency and reliability.

Part Context

Part of the Renesas DA9131 family of sub-PMICs, offering scalable power solutions for automotive and industrial applications. The series supports both commercial and automotive-grade variants, providing flexibility for different qualification requirements. Designed to complement Renesas microcontrollers and processors in complex embedded systems.

Replacement Considerations

Check for DA9131-A variant if automotive qualification is required. Verify pinout and electrical characteristics against other dual-channel buck converters from Renesas or competitors before substitution.

FAQ

What is the maximum output voltage supported by the DA9131-XXRT1?

The standard internal regulation supports up to 1.9V. Voltages above 1.9V can be achieved using an external resistor divider.

Does the DA9131-XXRT1 require external Schottky diodes?

No, the device features fully integrated switching FETs, eliminating the need for external diodes or FETs.