LM5574MTX

Voltage Regulators - DC DC Switching Regulators Overview

The LM5574MTX is a high-voltage synchronous buck regulator from Texas Instruments, part of the Simple Switcher family. It operates with an input voltage range of 6 V to 75 V and delivers up to 500 mA output current. The device supports adjustable output voltages from 1.225 V to 70 V. It features a switching frequency range of 50 kHz to 500 kHz and includes emulated current mode control for stability. The component is housed in a TSSOP-16 package and functions within a temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-side N-channel MOSFET and low-side synchronous rectifier for efficient power conversion.
• Utilizes emulated current mode control architecture to ensure stable operation across wide input voltage ranges.
• Includes programmable soft-start functionality to limit inrush current during startup sequences.
• Features integrated overcurrent protection and thermal shutdown mechanisms for system reliability.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive point-of-load (PoL) regulation
• Telecommunications power distribution systems
• Industrial DC-DC conversion modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout compatibility and electrical specifications. Ensure the ordering code matches the required tape-and-reel packaging format. Cross-reference the manufacturer's latest documentation to validate RoHS compliance status and any recent product change notices affecting the component.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing systems requiring high input voltage tolerance up to 75 V. It is suitable for applications needing compact solutions due to its integrated synchronous rectification. Consider the operating temperature range and available switching frequencies to optimize efficiency and external component sizing for the specific load requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM5574 series of high-voltage synchronous buck regulators. It is designed as a drop-in replacement for older non-synchronous counterparts like the LM2574 in certain high-voltage applications, offering improved efficiency through internal synchronous rectification while maintaining similar control loop characteristics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the LM5574MT/NOPB variant which differs primarily in packaging configuration. Verify functional equivalence with legacy parts such as the LM25574 by comparing pinouts and electrical limits carefully.