LM2575T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575T-3.3/NOPB is a monolithic integrated circuit from the SIMPLE SWITCHER family, functioning as a step-down switching voltage regulator with a fixed 3.3V output. It supports an input voltage range of 4.75V to 40V and delivers up to 1A of output current. The device operates at a fixed frequency of 52kHz and utilizes a TO-220-5 through-hole package. Key electrical parameters include a maximum operating temperature of +125°C, a minimum of -40°C, and a typical quiescent current of 5mA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates all active functions for a buck converter, requiring minimal external components.
• Includes internal frequency compensation and a fixed-frequency oscillator for simplified design.
• Features TTL shutdown capability for low-power standby operation.
• Provides comprehensive protection via thermal shutdown and per-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Applications

• Direct replacement for three-terminal linear regulators in power supply designs.
• Point-of-load regulation modules requiring high efficiency.
• Pre-regulator stages for downstream switching regulators.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific manufacturer suffix (e.g., NOPB) against the required datasheet revision, as component specifications may vary between original Texas Instruments production and licensed manufacturers such as Microchip or onsemi. Confirm that the TO-220-5 package variant matches the intended PCB footprint and thermal requirements. Ensure RoHS compliance status aligns with project constraints, particularly when sourcing from distributors holding mixed inventory.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model for applications requiring a fixed 3.3V output with up to 1A load capacity. It is suitable for systems where a wide input voltage range up to 40V is necessary. Consider the TO-220-5 through-hole package for prototyping or applications prioritizing ease of assembly over surface-mount density. Evaluate thermal dissipation needs based on the expected voltage drop and load current.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2575 series of SIMPLE SWITCHER regulators, designed to offer high-efficiency alternatives to traditional linear regulators. The series includes various fixed voltage outputs and adjustable versions, catering to diverse industrial and commercial power management needs. The LM2575T-3.3 specifically targets stable 3.3V generation in robust, through-hole configurations.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-3.3/NOPB