LM2575GR-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575GR-3.3 is a step-down switching regulator IC from the TAEJIN LM2575 series, designed for high-efficiency DC-DC conversion. It provides a fixed 3.3V output with a guaranteed maximum current of 1A. The device operates at a fixed internal oscillator frequency of 52kHz and supports a wide input voltage range. Key electrical parameters include an output voltage tolerance of +/- 4% under line and load conditions, and an adjustable version output range spanning 1.23 to 37V for variant models. The component features thermal shutdown and current limit protection mechanisms.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 52kHz fixed-frequency internal oscillator for simplified external component requirements.
• Includes TTL shutdown capability to enable low power standby modes.
• Provides built-in thermal shutdown and current limit protection for enhanced reliability.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power supply architectures
• Pre-regulator stages for switching regulators
• Efficient step-down conversion from higher bus voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin carefully, as the LM2575 part number is widely licensed across multiple vendors including onsemi and Texas Instruments. Confirm that the specific 'TAEJIN' branding matches your supply chain requirements. Check datasheet revisions to ensure compatibility with your design specifications regarding pinout and electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required with a 1A current capacity. The 52kHz switching frequency allows for the use of standard, readily available inductors. Ensure the input voltage range aligns with the system's power source. Consider the TO-220 or similar through-hole package availability if board space permits.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2575 family of SIMPLE SWITCHER step-down voltage regulators. The family is characterized by its simplicity, requiring only four external components for operation. It is a legacy industry-standard regulator often used in robust industrial and commercial applications where efficiency and ease of implementation are prioritized.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM2575T-3.3G (onsemi) and LM2575S-3.3 (Texas Instruments). Verify pin compatibility and thermal performance before substitution.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the internal switching frequency of the LM2575GR-3.3?

The device utilizes a fixed internal oscillator operating at 52kHz.

Does the LM2575GR-3.3 support low power standby modes?

Yes, it features TTL shutdown capability which allows for low power standby operation.