LM2575T-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575T-5.0/NOPB is a monolithic integrated circuit from Texas Instruments, functioning as a step-down switching voltage regulator within the SIMPLE SWITCHER family. It provides a fixed 5V output with a maximum load current of 1A. The device operates with an input voltage range of 4V to 40V and utilizes a fixed internal oscillator frequency of 52kHz. Designed for through-hole installation, it features a TO-220-5 package. Key electrical specifications include ±4% output voltage tolerance under specified line and load conditions, and ±10% oscillator frequency deviation. The component supports operation across a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates all active functions required for buck switching regulation, including a fixed-frequency oscillator and internal frequency compensation.
• Incorporates per-cycle current limiting and thermal shutdown mechanisms to ensure system safety during fault conditions.
• Supports external shutdown functionality with a typical standby current of 50μA.
• Serves as a high-efficiency replacement for three-terminal linear regulators, significantly reducing heat sink requirements.

Voltage Regulators - DC DC Switching Regulators Applications

• General-purpose DC/DC power supply designs requiring efficient step-down conversion
• Direct replacement for standard three-terminal linear regulators in existing circuits
• Battery-powered systems utilizing wide input voltage ranges
• Embedded hardware power distribution networks

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix /NOPB confirms compliance with RoHS standards and absence of hazardous substances. Confirm the physical package matches the TO-220-5 through-hole specification. Ensure the fixed 5.0V output variant aligns with design requirements, distinguishing it from adjustable or other voltage versions within the LM2575 series. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and revision status.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required with up to 1A load capacity. It is suitable for applications where through-hole mounting is preferred or necessary for mechanical stability. Consider the 52kHz switching frequency for standard inductor selection. Evaluate thermal management needs based on the input-to-output voltage differential and expected ambient temperatures within the -40°C to +125°C operating range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of SIMPLE SWITCHER power converters. The series offers various fixed output voltages (3.3V, 5V, 12V, 15V) and adjustable versions. The 'T' designation indicates the TO-220-5 through-hole package, while '/NOPB' signifies non-halogenated and lead-free construction. This specific model provides a regulated 5V output, differentiating it from the adjustable LM2575-ADJ or higher-current LM2576 variants.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-5.0/NOPB is functionally equivalent to LM2575T-5.0. Other variants in the same package include LM2575T-3.3/NOPB, LM2575T-12/NOPB, and LM2575T-15/NOPB for different fixed voltages. For adjustable output requirements in the same package, consider LM2575T-ADJ/NOPB.