LM2574M-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574M-12 is a SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator manufactured by National Semiconductor, now part of Texas Instruments. It operates as a buck converter with an input voltage range of 4 V to 40 V and provides a fixed 12 V output at up to 500 mA. The device features a switching frequency of approximately 58 kHz and includes internal compensation for minimal external component requirements. It supports shutdown functionality and operates within a temperature range of -40°C to +125°C in a 14-pin SOIC-Wide package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch eliminates the need for external protection diodes
• Internal frequency compensation reduces required external component count
• Fixed 12 V output option simplifies design for standard voltage rails
• Shutdown pin enables low standby current consumption

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic circuits
• Pre-regulation for downstream linear regulators
• Battery-powered systems requiring efficient step-down conversion
• Industrial control boards needing isolated or separated power domains

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific batch corresponds to National Semiconductor origin rather than Texas Instruments rebranding if legacy sourcing is required. Confirm RoHS compliance status via the manufacturer's official datasheet revision history. Ensure the SOIC-Wide-14 package matches your PCB footprint specifications. Check for moisture sensitivity level (MSL) ratings relevant to your assembly process timeline.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from a wide input range up to 40 V. It is suitable for applications prioritizing simplicity over adjustable output flexibility. Consider thermal management due to the 0.5 A continuous current capability in a surface-mount package. Evaluate efficiency requirements against the fixed 58 kHz switching frequency constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574 family of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. It serves as a direct replacement for older National Semiconductor inventory while maintaining functional compatibility with Texas Instruments' updated manufacturing processes. The series is widely used in general-purpose power supply designs requiring robust step-down performance.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2574M-12/NOPB is the lead-free equivalent version. LM2574HV variants support higher input voltages but may differ in absolute maximum ratings.