LM25576MHX-NS

Voltage Regulators - DC DC Switching Regulators Overview

The LM25576MHX-NS is a step-down DC/DC switching regulator manufactured by National Semiconductor, now part of Texas Instruments. It operates with an input voltage range from 6 V to 42 V and delivers a maximum output current of 3 A. The device supports adjustable output voltages between 1.225 V and 40 V. It features a programmable switching frequency ranging from 50 kHz to 1 MHz and includes frequency synchronization capabilities. The controller utilizes current-mode control with pulse width modulation. It is housed in a 20-pin HTSSOP package and functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-voltage power switch for efficient buck conversion
• Supports external clock synchronization for noise reduction
• Includes comprehensive protection against overcurrent and thermal overload

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial point-of-load regulation
• Automotive electronics power distribution
• Distributed power systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Confirm that the specific suffix corresponds to the intended packaging and compliance status. Ensure the component matches the required electrical specifications for your design. Check for RoHS compliance documentation if environmental regulations apply. Validate the pinout configuration against the official datasheet before integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when an input voltage up to 42 V is required. Choose it for applications needing precise current-mode control. Consider it for designs requiring frequency synchronization to avoid audible noise or EMI issues. Evaluate the thermal performance requirements based on the 3 A output capability. Ensure the chosen switching frequency aligns with the passive component selection.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the Simple Switcher family of power management ICs. It represents a transition period product where National Semiconductor branding may appear alongside Texas Instruments manufacturing. The device serves as a robust solution for medium-power buck applications. It complements other regulators in the series offering different voltage ratings or package options.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM25576MH/NOPB is a confirmed equivalent part number from Texas Instruments. Verify pin compatibility and electrical parameters before substitution. Ensure the replacement meets the same thermal and regulatory standards.