LM2575M-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575M-3.3 is a monolithic integrated circuit from the SIMPLE SWITCHER family, functioning as a step-down switching regulator. It provides a fixed 3.3V output with a maximum load current of 1A. The device operates within an input voltage range of 4.75V to 40V and utilizes a buck topology. Designed for through-hole mounting in a TO-220-5 package, it supports an operating junction temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 1A power switch for efficient DC-DC conversion
• Includes internal frequency compensation for simplified design
• Features thermal shutdown protection for operational safety

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation modules
• Pre-regulator stages for linear regulators
• Efficient buck converter circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin carefully, as National Semiconductor was acquired by Texas Instruments. Confirm that the specific part number corresponds to the legacy National Semiconductor production run rather than the TI equivalent. Check datasheet revisions to ensure pinout and electrical specifications match the intended application requirements before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output at 1A is required with minimal external components. The TO-220-5 package facilitates through-hole assembly and heat dissipation. Ensure the input voltage remains within the specified 4.75V to 40V range to maintain stable regulation and protect the internal switch.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of SIMPLE SWITCHER regulators, known for ease of design and high efficiency. The 'M' suffix typically denotes the plastic TO-220-5 package variant. As a legacy product from National Semiconductor, it represents a standard solution for basic step-down power supply applications prior to industry consolidation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM2575T-3.3/NOPB (Texas Instruments)
• LM2575HV-3.3/NOPB (Texas Instruments)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the switching frequency of the LM2575M-3.3?

The device operates at a nominal switching frequency of 52 kHz.

Does the LM2575M-3.3 support adjustable output voltage?

No, the '-3.3' suffix indicates a fixed 3.3V output. Adjustable versions use the '-ADJ' suffix.