LM2575S-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575S-3.3 is a step-down switching regulator IC manufactured by UMW, designed for high-efficiency voltage regulation in DC-DC applications. It operates with a fixed output voltage of 3.3V and supports a maximum output current of 2A. The device accepts an input voltage range up to 40V and utilizes a buck topology for power conversion. Key electrical parameters include a switching frequency of 150kHz and a positive output configuration. The component is rated for an operating temperature range from -40°C to 125°C and is housed in a surface-mount TO-263-5L package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and internal compensation circuitry to minimize external component requirements.
• Includes built-in thermal shutdown and cycle-by-cycle current limiting for robust fault protection.
• Offers high conversion efficiency across various load conditions compared to linear regulators.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic circuits
• Pre-regulation stages for linear voltage regulators
• Efficient DC-DC conversion in industrial control systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation as UMW rather than legacy National Semiconductor or Texas Instruments sources. Confirm the specific suffix indicates the TO-263-5L surface mount package variant. Ensure the output voltage rating matches the required 3.3V specification. Check RoHS compliance status against current environmental regulations. Validate the switching frequency parameter of 150kHz if timing-sensitive designs are involved.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model when a higher output current capacity of 2A is required compared to standard 1A variants. The 150kHz switching frequency allows for smaller passive components than lower-frequency alternatives. Ensure the input voltage does not exceed the 40V maximum rating. Consider the thermal performance of the TO-263 package for heat dissipation needs in enclosed spaces.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2575 series of monolithic integrated switching regulators. The series provides all active functions necessary for step-down converters. It serves as a direct replacement for traditional three-terminal linear regulators, offering improved efficiency and reduced heat generation. The S suffix typically denotes surface mount packaging options within the family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-3.3/NOPB: Texas Instruments equivalent with similar specifications but different pinout compatibility verification required. LM2575HV-3.3: Higher input voltage variant suitable for applications exceeding 40V input limits.