LM2575-3.3YN

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575-3.3YN is a monolithic integrated circuit providing all active functions for a step-down (buck) switching regulator. It delivers a fixed 3.3V output with a maximum load current of 1A. The device operates from an input voltage range of 4V to 40V and utilizes a fixed 52kHz internal oscillator. It is housed in a PDIP-16 through-hole package. The component supports a junction temperature range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and frequency compensation, requiring minimal external components for operation.
• Includes built-in current limiting and thermal shutdown protection mechanisms for system safety.
• Offers excellent line and load regulation performance suitable for standard applications.

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient step-down DC-DC power supplies
• Pre-regulators for linear post-regulators
• Positive-to-negative converter topologies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific manufacturer source, as National Semiconductor was acquired by Texas Instruments, which was later acquired by Microchip Technology. Confirm that the PDIP-16 package matches the design requirements. Ensure the operating temperature range meets the environmental specifications. Check RoHS compliance status if required by the project standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output at 1A is required with a wide input voltage range up to 40V. The through-hole PDIP-16 package is suitable for prototyping or applications where surface mount technology is not preferred. Consider the 52kHz switching frequency for inductor selection and efficiency trade-offs compared to higher-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of SIMPLE SWITCHER® regulators. The series includes variants such as LM1575, LM2575HV, and adjustable versions. The 'Y' suffix typically denotes the PDIP-16 through-hole package, while 'N' often indicates lead-free/RoHS compliance. The series is designed to replace traditional three-terminal linear regulators to reduce heat dissipation requirements.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include LM2575-3.3T, LM2575-3.3N, and LM2575-3.3S depending on the required package type. For high-voltage input applications exceeding 40V, consider the LM2575HV series. Ensure pin compatibility and thermal characteristics match the existing design constraints.