LM25576MHX

Voltage Regulators - DC DC Switching Regulators Overview

The LM25576MHX is a 4.5V to 42V, 3A step-down DC/DC switching regulator from Texas Instruments. It operates with an input voltage range of 6V to 42V and delivers up to 3A output current. The device supports adjustable output voltages from 1.225V to 40V using external resistors. It features a fixed switching frequency range of 50kHz to 1MHz, controlled via current-mode PWM. The component is housed in a 20-pin HTSSOP package and functions within an operating temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side N-channel MOSFET for simplified design
• Current-mode control architecture for fast transient response
• Frequency synchronization capability to reduce system noise
• Built-in thermal shutdown and cycle-by-cycle current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial point-of-load regulation
• Automotive electronics power distribution
• Distributed power supply architectures
• Battery-powered equipment step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout compatibility and electrical specifications. Ensure the ordering code matches the required package variant and temperature rating. Cross-reference the part number with official distributor catalogs to validate authenticity and revision status before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 3A buck converter solution is required for inputs up to 42V. Consider the HTSSOP-20 package constraints for thermal management at full load. Evaluate the need for frequency synchronization if multiple converters operate in proximity. Verify that the external component selection supports the desired output voltage and ripple specifications.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the SIMPLE SWITCHER family of integrated power modules. It combines the controller and power switch into a single package to minimize external component count. The LM25576 series provides a robust solution for medium-power applications requiring high efficiency and compact footprint compared to discrete designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM25576MHX/NOPB: Lead-free version with identical electrical characteristics. LM25576QMH: Automotive qualified variant with enhanced reliability standards. LM25576BLDT: Tape and reel packaging option for automated assembly.