LM2575T-15G

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575T-15G is a monolithic integrated circuit step-down switching regulator manufactured by onsemi. It provides a fixed 15 V output with a guaranteed 1.0 A load current capability. The device operates within a wide input voltage range of 4.75 V to 40 V and utilizes a 52 kHz fixed-frequency internal oscillator. Designed for high efficiency, it requires only four external components. Key protection features include thermal shutdown and current limit protection. The component is housed in a TO-220-5 through-hole package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Fixed 15 V output voltage with ±4% maximum regulation over line and load conditions
• Integrated 52 kHz fixed-frequency internal oscillator for simplified design
• TTL shutdown capability enabling low power standby mode operation
• Built-in thermal shutdown and current limit protection mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Simple and high-efficiency step-down (buck) regulators
• Efficient pre-regulator for linear regulators
• On-card switching regulators
• Positive to negative converters (Buck-Boost)
• Negative step-up converters

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'G' indicates lead-free packaging compliance as per manufacturer documentation. Confirm the fixed 15 V output variant matches system requirements, distinguishing it from adjustable or other voltage versions within the LM2575 series. Ensure the TO-220-5 through-hole package aligns with PCB layout constraints. Cross-reference datasheet revisions for any updates to electrical characteristics or pin configurations before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 15 V output at 1 A is required from an input voltage between 4.75 V and 40 V. It is suitable for designs prioritizing simplicity with minimal external component count. Consider the 52 kHz switching frequency for inductor selection and EMI management. Verify that the through-hole TO-220-5 package fits the mechanical assembly. This part replaces older National Semiconductor equivalents with equivalent functionality.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2575 series of switching regulators, which are designed for easy implementation of buck converters. The series includes fixed output variants (3.3 V, 5.0 V, 12 V, 15 V) and an adjustable version. The LM2575T-15G specifically offers the 15 V fixed output option. It serves as a direct replacement for traditional three-terminal linear regulators, offering significantly higher efficiency and reduced heat dissipation requirements in power supply applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-15/NOPB is a confirmed substitute part number offering identical electrical specifications and functionality.