LM2575SX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575SX-5.0/NOPB is a SIMPLE SWITCHER® 1A Step-Down Voltage Regulator manufactured by Texas Instruments. It operates with an input voltage range of 4.75 V to 40 V and provides a fixed 5.0 V output. The device utilizes a Buck topology with a typical switching frequency of 52 kHz. It is housed in a TO-263-5 (D2PAK) surface-mount package. Key electrical specifications include a maximum output current of 1 A, a quiescent current of 5 mA, and an operating temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated fixed-frequency oscillator eliminates the need for external frequency compensation components.
• Built-in thermal shutdown and cycle-by-cycle current limiting ensure robust protection under fault conditions.
• Designed as a direct replacement for linear regulators, significantly reducing heat dissipation requirements.
• Supports external shutdown control for low standby power consumption.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power supply architectures
• Pre-regulators for switching post-regulators
• Efficient buck converters replacing linear regulators in battery-powered systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SX' indicates the TO-263-5 surface mount package variant distinct from through-hole or standard SOT versions. Confirm the 'NOPB' designation ensures compliance with RoHS standards and absence of lead-based materials. Cross-reference the manufacturer datasheet to validate pinout compatibility and thermal pad connectivity requirements for your PCB layout.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required from an input voltage up to 40V with a load current not exceeding 1A. The TO-263-5 package is suitable for applications requiring moderate thermal performance without additional heatsinks. Ensure the design accounts for the 52kHz switching frequency to optimize inductor selection and minimize electromagnetic interference.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of monolithic integrated circuits designed for step-down switching regulator applications. The series offers various fixed output voltages and adjustable versions, providing a complete solution with minimal external components. It is widely recognized for its ease of use and reliability in industrial and commercial power management designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct functional equivalents within the same family include LM2575S-5.0/NOPB and LM2575T-5.0/NOPB, differing primarily in package type. For higher input voltage capabilities, consider the LM2575HV series variants such as LM2575HVS-5.0/NOPB.