LM2575-12BT

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575-12BT is a monolithic integrated circuit step-down (buck) switching regulator manufactured by Microchip Technology. It provides a fixed 12V output at up to 1A current capability from an input voltage range of 4V to 40V. Operating at a typical switching frequency of 52kHz, the device integrates a 52kHz oscillator and requires only four external components for operation. It features internal frequency compensation and thermal shutdown protection. The component is housed in a TO-220-5 package and supports through-hole mounting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 52kHz oscillator and internal frequency compensation for simplified design
• Includes built-in thermal shutdown and current limit protection circuits
• Requires only four external components to function as a complete buck converter

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient step-down DC-to-DC power supplies
• Pre-regulators for linear regulators
• Positive-to-negative voltage inversion converters

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer marking on the component body to confirm it originates from Microchip Technology or its acquired entities, such as Micrel Semiconductor. Ensure the part number suffix matches the specific package variant required for your assembly process. Cross-reference the datasheet revision date with your design specifications to ensure compatibility with current manufacturing standards and environmental compliance requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required from an input voltage between 4V and 40V with a load current up to 1A. The TO-220-5 package is suitable for applications requiring through-hole mounting and adequate heat dissipation without additional heatsinking under moderate loads. Consider the 52kHz switching frequency when designing the external inductor and capacitor values to balance size and efficiency.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2575 series of simple switcher regulators, which are designed for easy implementation of buck converters. The series offers various fixed output voltages to accommodate different system requirements while maintaining a consistent control architecture. The LM2575-12BT specifically targets applications needing a stable 12V rail from higher voltage sources, leveraging the robust performance characteristics of the broader family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include the LM2575-12 from other manufacturers like Texas Instruments or ON Semiconductor, provided the pinout and electrical specifications match. Verify that alternative parts support the same 1A output current and 40V maximum input voltage. Ensure the replacement package is identical or compatible with the existing PCB footprint.