LM2575T-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575T-3.3/NOPB is a monolithic integrated circuit step-down switching voltage regulator from the Texas Instruments SIMPLE SWITCHER family, housed in a TO-220-5 through-hole package. It provides a fixed 3.3 V output with a maximum load current of 1 A. The device operates within an input voltage range of 4.75 V to 40 V and utilizes a fixed 52 kHz internal oscillator. Designed for high efficiency, it replaces linear regulators to reduce heat dissipation requirements. Key electrical specifications include a typical quiescent current of 5 mA, an operating temperature range from -40 °C to +125 °C, and built-in thermal shutdown and cycle-by-cycle current limiting protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated buck topology with fixed frequency oscillation for simplified external component requirements
• Built-in thermal shutdown and cycle-by-cycle current limiting for system fault protection
• Designed as a direct replacement for three-terminal linear regulators to minimize heatsink needs

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power supply architectures
• Pre-regulator stages for downstream switching regulators
• Efficient battery-powered systems requiring step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status according to the manufacturer's latest documentation. Confirm the TO-220-5 package variant matches the required through-hole mounting specifications for the target PCB design. Ensure the fixed 3.3 V output version aligns with the system voltage requirements, as other fixed voltage options exist within the same series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output at up to 1 A is required with minimal external parts count. The TO-220-5 package is suitable for applications where through-hole assembly is preferred or higher thermal mass is beneficial. Consider the 40 V maximum input rating and ensure the input voltage source remains within the specified 4.75 V to 40 V operational window for stable regulation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of SIMPLE SWITCHER power converters, which are widely recognized for their ease of use and robust performance in DC-DC conversion applications. The series includes various fixed output voltages and adjustable versions, catering to diverse power management needs across industrial and consumer electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-3.3/NOPB is functionally equivalent to LM2575T-3.3. Cross-manufacturer equivalents such as onsemi LM2575TV-3.3G share similar pinouts and electrical characteristics but require verification of specific parameter tolerances and packaging details.