LM5575MH/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM5575MH/NOPB is a high-voltage step-down switching regulator manufactured by Texas Instruments, originally part of the National Semiconductor portfolio. It operates with an input voltage range up to 75V and delivers a continuous output current of 1.5A. The device utilizes a buck topology and features an adjustable output voltage ranging from 1.225V to 70V. It supports a programmable switching frequency between 50kHz and 500kHz. The component is housed in a 16-lead HTSSOP package and is qualified under AEC-Q100 standards for automotive applications, ensuring reliability across an operating temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage power switch capable of handling input voltages up to 75V
• Adjustable output voltage regulation with wide input range compatibility
• Programmable switching frequency allows optimization for efficiency or size
• Automotive-grade qualification ensures robust performance in harsh environments

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment and display power systems
• Industrial control power distribution networks
• High-voltage battery-powered equipment
• Point-of-load regulation in telecom infrastructure

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments acquired National Semiconductor. Confirm the specific suffix 'NOPB' indicates lead-free and RoHS compliance. Ensure the package type matches the required PCB footprint, specifically the HTSSOP-16 variant. Cross-reference the AEC-Q100 qualification status if the application demands automotive reliability standards. Validate the date code against current production status to avoid obsolete stock issues.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a single-stage solution is required for high-input voltage buck conversion without external MOSFETs. The 1.5A current rating suits moderate power loads where thermal management in an HTSSOP package is feasible. Consider the adjustable output flexibility for custom voltage rails. Evaluate the switching frequency range to balance electromagnetic interference requirements against passive component sizing constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM5575 series of high-voltage switching regulators. It serves as a monolithic integrated circuit that combines the controller and power switch into a single package. This integration simplifies design compared to discrete solutions using separate controllers and external transistors. The series is designed to replace linear regulators in high-differential-voltage applications to improve efficiency and reduce heat dissipation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the LM5575MHX/NOPB, which shares identical electrical specifications but differs in packaging format (Reel vs Tube). Verify pinout compatibility and thermal characteristics when transitioning between tube and reel packages. No alternative functional equivalents are confirmed in the provided documentation.