LM5169FQDDARQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM5169FQDDARQ1 is an automotive-grade synchronous buck converter with Fly-Buck capability, designed for high-voltage input applications. It operates within a wide input voltage range of 6 V to 120 V and delivers up to 650 mA output current. The device features adjustable output voltage starting from 1.2 V, integrated synchronous rectification, and supports switching frequencies between 100 kHz and 1 MHz. It includes comprehensive protection mechanisms such as overcurrent, thermal shutdown, and undervoltage lockout. Operating reliably across an extended junction temperature range of -40°C to +150°C, it utilizes an 8-SO-PowerPad package for efficient thermal management in compact designs.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports both standard buck and Fly-Buck isolated topology configurations
• Integrated synchronous rectification for enhanced efficiency
• Wide input voltage tolerance suitable for harsh automotive environments
• Extended operating temperature range for reliable performance

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Body control modules
• High-voltage DC-DC conversion in electric vehicles
• Industrial power distribution networks

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'FQ' against the manufacturer's official datasheet to confirm automotive qualification status and exact electrical tolerances. Ensure the ordering part number matches the required package variant and temperature grade. Cross-reference the RoHS compliance status and moisture sensitivity level with current production notices. Confirm that the supplier provides genuine Texas Instruments components with traceable lot codes to prevent counterfeit risks in safety-critical automotive assemblies.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits requiring high input voltage tolerance combined with isolated output capabilities via Fly-Buck topology. It is suitable for applications needing moderate output current with high efficiency in constrained spaces. Consider the 8-SO-PowerPad package for its thermal performance advantages over standard SOIC packages. Evaluate the switching frequency range to balance electromagnetic interference requirements against external component size constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM5169 family of high-voltage DC/DC converters from Texas Instruments. The family includes non-automotive variants like the LM5169FDDAR and other automotive grades such as the LM5169PQDDARQ1. These parts share core architectural features but differ in qualification standards, temperature ranges, and specific electrical parameters. The LM5169 series is engineered for robust performance in demanding power management scenarios.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM5169PQDDARQ1 serves as a verified alternative within the same automotive family, offering similar functionality with potentially different thermal or electrical specifications. Verify pin compatibility and parameter alignment before substitution. Other members of the LM516x series may require circuit adjustments due to variations in input voltage limits or current ratings.