LM2575MX-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575MX-3.3/NOPB is a step-down switching voltage regulator from the SIMPLE SWITCHER family, manufactured by Texas Instruments. It operates with an input voltage range of 4.75 V to 40 V and provides a fixed 3.3 V output at up to 1 A load current. The device integrates a 150 kHz internal oscillator for efficient power conversion. It utilizes a TO-263-5 (D2PAK) surface-mount package designed for thermal performance. The component supports operation across a temperature range of -40°C to +125°C junction temperature.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a monolithic synchronous buck converter topology for high-efficiency DC-DC step-down regulation.
• Includes built-in frequency compensation and fixed-frequency oscillation to simplify external circuit design.
• Features internal thermal shutdown and current limiting protection mechanisms for robust operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power supply architectures
• Pre-regulator stages for linear post-regulators
• Efficient step-down conversion from standard bus voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per the manufacturer's latest documentation. Confirm the package designation matches the required TO-263-5 footprint for PCB layout compatibility. Ensure the operating environment remains within the specified -40°C to +125°C junction temperature limits to maintain reliability. Cross-reference the datasheet revision date to ensure all electrical characteristics align with current production standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required from an input voltage between 4.75 V and 40 V. It is suitable for applications needing up to 1 A continuous load current with minimal external components. Consider the TO-263-5 package for adequate heat dissipation without additional heatsinking in moderate environments. Evaluate the 150 kHz switching frequency against EMI requirements and inductor size constraints compared to higher or lower frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of SIMPLE SWITCHER power converters, known for their ease of use and high efficiency. The series includes adjustable and fixed voltage versions in various packages. The LM2575MX variant specifically denotes the surface-mount D2PAK form factor, distinguishing it from through-hole options like the TO-220. It serves as a core component in Texas Instruments' portfolio for general-purpose DC-DC conversion.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2575MX-3.3/NOPB?

The maximum input voltage is 40 V.

Does the LM2575MX-3.3/NOPB include internal feedback resistors?

Yes, the fixed 3.3 V version has internal feedback resistors set to provide the nominal output voltage, requiring no external divider network.