LM2575HVT-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575HVT-3.3/NOPB is a monolithic integrated circuit Buck converter from the SIMPLE SWITCHER family, designed for high-efficiency step-down regulation. It operates with an input voltage range of 4.75 V to 60 V and provides a fixed 3.3 V output at up to 1 A load current. The device utilizes a 52 kHz internal oscillator to minimize external passive component size. Key electrical parameters include a maximum quiescent current of 8 mA and a shutdown supply current of less than 50 µA. It supports operation over an extended temperature range from -40°C to +125°C junction temperature.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage power switch capable of handling input voltages up to 60 V.
• Fixed 3.3 V output option eliminates the need for external feedback resistors.
• Internal frequency compensation simplifies design and reduces external component count.
• Thermal shutdown and current limit protection ensure robust operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for distributed power architectures
• Pre-regulation for downstream linear regulators
• Battery-powered systems requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin, as this part was originally a National Semiconductor product now managed by Texas Instruments. Confirm the presence of the NOPB suffix to ensure compliance with RoHS directives and lead-free specifications. Check the datasheet revision date to ensure alignment with current manufacturing standards and pinout configurations.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required from a high-voltage source up to 60 V. The TO-220-5 package is suitable for applications requiring through-hole mounting and moderate thermal dissipation. Compare against the LM2575T series if lower input voltage (40 V max) is sufficient, or the LM2575S series if surface-mount technology is preferred.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2575HVT-3.3/NOPB is a component within the SIMPLE SWITCHER family of switching voltage regulators manufactured by Texas Instruments, which acquired National Semiconductor. This specific part number designates a high-voltage step-down regulator in a TO-220-5 through-hole package. The 'HVT' suffix indicates high input voltage capability and through-hole packaging, while '3.3' specifies the fixed output voltage.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575HVT-3.3/NOPB is the direct equivalent. LM2575T-3.3/NOPB serves as a substitute if input voltage does not exceed 40 V. LM2575S-3.3/NOPB is an alternative for surface-mount designs with similar electrical characteristics.