LMR51425SQDRRRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR51425SQDRRRQ1 is an automotive-grade synchronous buck converter from Texas Instruments, designed for high-voltage applications. It operates with an input voltage range of 4 V to 36 V and delivers a maximum output current of 2.5 A. The device supports adjustable output voltages from 800 mV to 28 V. Key electrical parameters include a quiescent current of 25 uA and a programmable switching frequency ranging from 200 kHz to 1 MHz. It functions within a junction temperature range of -40°C to +125°C and utilizes a WSON-12 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Integrated synchronous rectification provides efficient step-down conversion without external diodes.
• Programmable switching frequency allows optimization for specific size and performance requirements.
• Low quiescent current minimizes power consumption during standby or light-load conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems requiring stable voltage regulation.
• Body control modules (BCM) for managing peripheral power distribution.
• Telematics units and gateway devices in connected vehicles.
• ADAS sensor power supplies needing robust transient response.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes to ensure correct packaging and temperature grade. Confirm AEC-Q100 certification status if automotive compliance is mandatory for your design. Check moisture sensitivity level handling requirements prior to assembly. Ensure input voltage specifications align with your system's rail characteristics to prevent overvoltage damage.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing for automotive environments requiring a 36V input capability. Choose this model if a compact WSON-12 footprint is necessary for space-constrained PCB layouts. Consider this device for applications needing low static current to preserve battery life in standby modes. Evaluate thermal performance based on the expected load current and ambient operating conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMR514xx family of SIMPLE SWITCHER converters. It shares architectural similarities with other members like the LMR51450 but differs in current rating and specific feature sets. The Q1 suffix indicates automotive qualification, distinguishing it from commercial variants. It complements higher voltage options like the LMR38025 for broader system power management strategies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same family include the LMR51425SDRRR for non-automotive applications. Verify pin compatibility and thermal characteristics when cross-referencing with older generations. No other direct equivalent part numbers are confirmed in the provided documentation.