L5975AD

Voltage Regulators - DC DC Switching Regulators Overview

The L5975AD is a step-down monolithic power switching regulator designed for automotive applications. It delivers up to 2.5 A DC output current with a minimum switch current limit of 3.1 A. The operating input voltage ranges from 4 V to 36 V, accommodating cold crank conditions. The adjustable output voltage spans from 1.235 V to 35 V using a 3.3 V ±2% reference. An internal P-channel DMOS transistor provides a typical RDS(on) of 250 mΩ. The device operates at a fixed frequency of 500 kHz and features thermal shutdown, pulse-by-pulse current limiting, and synchronization capabilities.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Qualified following AEC-Q100 requirements for automotive reliability
• Low dropout operation enabling 100% duty cycle performance
• Inhibit function allows zero current consumption when disabled
• Protection against feedback disconnection ensures stable regulation

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive systems requiring operation during cold crank conditions
• Power management for 5V bus architectures in vehicle electronics
• General purpose step-down conversion in industrial environments

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix designation to confirm package type and environmental compliance status. Ensure the ordering code matches the required HSOP8 exposed frame configuration for optimal thermal performance. Cross-reference the datasheet revision to validate feature availability such as synchronization or inhibit functions before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an input voltage range of 4 V to 36 V is required for buck conversion. It is suitable for designs needing up to 2.5 A continuous load current with high efficiency due to the internal P-channel switch. Consider the HSOP8 package for thermal management needs and verify compatibility with 500 kHz switching frequency constraints for external component sizing.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to STMicroelectronics' family of monolithic step-down switching regulators. It shares architectural similarities with the L5970AD but offers higher current capability. The series targets robust power management solutions for automotive and industrial sectors, emphasizing reliability and compact design through integrated high-side MOSFET technology.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct substitutes within the same product family that may offer different current ratings or package options. Verify pin-to-pin compatibility if replacing existing designs. Confirm that alternative parts meet the same AEC-Q100 qualification standards for automotive deployment.