LM5575QMHX/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM5575QMHX/NOPB is an automotive-grade synchronous step-down switching regulator from Texas Instruments. It operates with an input voltage range of 4.5V to 60V and delivers a continuous output current of 1.5A. The device features an adjustable output voltage ranging from 0.8V to 57V, with a fixed 5V option available. It supports switching frequencies between 300kHz and 2.2MHz. Qualified under AEC-Q100 standards, it functions reliably across an extended junction temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side and low-side N-channel power MOSFETs for efficient synchronous rectification
• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments
• Programmable soft-start capability to limit inrush current during startup
• Built-in protection mechanisms including cycle-by-cycle current limiting, thermal shutdown, and undervoltage lockout

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for automotive electronic control units (ECUs)
• Power distribution systems in infotainment and telematics modules
• Industrial DC-DC conversion requiring wide input voltage tolerance
• Battery-powered equipment utilizing buck topology for efficiency

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'Q' confirms AEC-Q100 automotive qualification status. Confirm the 'HX' designation indicates tape-and-reel packaging suitable for automated surface-mount assembly. Ensure the design accounts for the specified maximum junction temperature of 150°C to maintain long-term reliability in high-thermal environments.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an automotive-rated synchronous buck converter is required with an input voltage up to 60V. It is appropriate for designs needing a continuous 1.5A output current with adjustable voltage settings. Consider the thermal performance requirements given the 150°C junction limit and the availability of the HTSSOP package for space-constrained PCB layouts.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM557x family of SIMPLE SWITCHER regulators, designed for high-efficiency power conversion. It serves as a robust solution for replacing older asynchronous regulators in automotive and industrial applications where higher efficiency and compact size are critical. The family emphasizes ease of use with minimal external component counts.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum operating junction temperature?

The device is rated for a maximum junction temperature of 150°C.

Is the output voltage adjustable?

Yes, the output voltage is adjustable from 0.8V to 57V using external resistors.