LM25574MT

Voltage Regulators - DC DC Switching Regulators Overview

The LM25574MT is a SIMPLE SWITCHER step-down switching regulator manufactured by Texas Instruments. It operates with an input voltage range of 6V to 42V and provides a single adjustable output from 1.225V to 40V. The device delivers a maximum output current of 500mA with a switchable frequency between 50kHz and 1MHz. It features current mode control, integrated power MOSFETs, and thermal shutdown protection. The component is housed in a 16-TSSOP package and supports operation temperatures from -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side and low-side power MOSFETs for efficient step-down conversion
• Current mode control architecture enabling fast transient response and simplified compensation
• Programmable switching frequency allows optimization for size and efficiency
• Built-in thermal shutdown and cycle-by-cycle current limiting for robust protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Industrial control power supplies
• Automotive electronics subsystems
• Communication equipment power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix and revision level against the manufacturer's latest datasheet to ensure compatibility with design requirements. Confirm lead times and availability status as this part may be subject to obsolescence or supply chain constraints. Validate that the package dimensions and pinout match the intended PCB footprint before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, non-synchronous buck solution is required for inputs up to 42V. Ensure the load current does not exceed 500mA continuous. Consider the external component count for feedback resistors and filter capacitors during the initial design phase. Verify that the chosen switching frequency aligns with electromagnetic interference constraints and inductor size limitations.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the SIMPLE SWITCHER family, designed to simplify power supply design with minimal external components. It serves as a cost-effective alternative to synchronous rectifiers in applications where peak efficiency is secondary to simplicity and component count reduction. The LM25574 series is widely used in general-purpose industrial and commercial electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM25574MT/NOPB is a direct equivalent offering identical electrical specifications and pinout compatibility.