LM2575N-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575N-ADJ/NOPB is a monolithic integrated circuit from the Texas Instruments SIMPLE SWITCHER family, functioning as a step-down (buck) switching voltage regulator. It provides a maximum output current of 1 A with an adjustable output voltage range spanning from 1.23 V to 37 V. The device operates with a wide input voltage range of 4 V to 40 V and utilizes a fixed internal oscillator frequency of 52 kHz. Designed for through-hole mounting in a TO-220-5 package, it supports an operating temperature range from -40 °C to +125 °C. Key electrical characteristics include a typical quiescent current of 5 mA and a shutdown supply current of 50 µA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and internal frequency compensation to minimize external component count.
• Includes built-in thermal shutdown and cycle-by-cycle current limiting for fault protection.
• Features an external shutdown pin that reduces standby current consumption significantly.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply architectures requiring efficient buck conversion.
• Pre-regulator stages for downstream switching regulators.
• Battery-powered systems utilizing high-efficiency DC-DC step-down topologies.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'N' confirms the through-hole TO-220-5 package variant rather than surface-mount options. Confirm the 'ADJ' designation indicates the adjustable output version. Ensure the 'NOPB' suffix denotes lead-free and RoHS compliance status per manufacturer specifications before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust through-hole solution is required for 1 A load applications. The adjustable output allows flexibility for non-standard voltage rails within the 1.23 V to 37 V range. Consider the thermal performance of the TO-220 package relative to expected ambient temperatures and heat dissipation requirements in the target enclosure design.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of SIMPLE SWITCHER regulators, which are designed as direct replacements for traditional three-terminal linear regulators. The series offers improved efficiency and reduced heat generation. The LM2575N-ADJ/NOPB specifically represents the adjustable, through-hole variant within this widely used power management family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct functional equivalents include other LM2575 series variants such as the LM2575T-ADJ/NOPB for surface-mount applications or fixed-voltage versions like LM2575T-5.0/NOPB if a specific rail is needed. Verify pinout compatibility and thermal resistance differences when substituting between package types.