LM2574HVMX-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574HVMX-3.3 is a SIMPLE SWITCHER step-down voltage regulator manufactured by Texas Instruments, designed for high-voltage input applications up to 60 V. It provides a fixed 3.3 V output with a maximum load current of 500 mA. The device operates at a switching frequency of 58 kHz and supports both buck and inverting topologies. It is housed in a SOIC-Wide-14 surface-mount package and functions within an operating temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch capable of delivering 500 mA output current
• Fixed 3.3 V output option eliminates external resistor divider requirements
• Internal frequency compensation simplifies external component count
• Built-in thermal shutdown protects against excessive junction temperatures

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for high-voltage bus systems
• Pre-regulation stage for downstream linear regulators
• Inverting power supply generation from positive inputs
• Battery-powered equipment requiring efficient voltage conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'HVMX' confirms the wide-input voltage variant (up to 60 V) rather than the standard 40 V version. Confirm '/NOPB' indicates lead-free and RoHS compliance. Ensure the SOIC-Wide-14 package matches the PCB footprint design. Cross-reference the manufacturer datasheet for specific ordering information and environmental ratings.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when input voltages exceed 40 V but remain below 60 V. The fixed 3.3 V output is suitable for digital logic supplies. Consider the 58 kHz switching frequency for balancing efficiency and passive component size. Verify that the 500 mA current rating meets the peak load requirements of the target circuit.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574HV series, which extends the standard LM2574 family to handle higher input voltages. It shares the SIMPLE SWITCHER architecture with internal feedback and control circuits. The 'MX' designation specifies the tape-and-reel packaging format for automated assembly processes.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2574HVMX-3.3/NOPB is the identical lead-free and RoHS-compliant version of the same component.