LM2575SX-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575SX-5.0/NOPB is a SIMPLE SWITCHER® 1A Step-Down Voltage Regulator from Texas Instruments, operating in a TO-263-5 (D2PAK) surface-mount package. It provides a fixed 5.0 V output with a maximum load current of 1 A. The device accepts an input voltage range of 4.75 V to 40 V and operates at a typical switching frequency of 52 kHz. Internal features include frequency compensation, a fixed-frequency oscillator, thermal shutdown, and cycle-by-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated SIMPLE SWITCHER architecture requiring minimal external components for buck conversion
• Built-in thermal shutdown and cycle-by-cycle current limiting for fault protection
• Fixed 52 kHz switching frequency enables the use of compact passive components
• Supports external shutdown control to minimize standby power consumption

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Pre-regulation stages for switching regulators
• Battery-powered equipment step-down conversion
• Industrial control system power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number suffix, specifically /NOPB, to confirm lead-free compliance and specific manufacturer lot codes. Confirm the package variant matches the required TO-263-5 footprint. Ensure the design accounts for the specified thermal resistance characteristics inherent to the D2PAK housing during high-load operation.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V output is required from an input rail between 4.75 V and 40 V. The TO-263-5 package is suitable for applications needing moderate heat dissipation without additional heatsinks. Consider the 1 A current limit and 52 kHz frequency when sizing external inductors and capacitors for the target ripple specifications.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2575 family of monolithic integrated circuits designed as drop-in replacements for three-terminal linear regulators. The series offers simplicity and flexibility, providing all active functions for a buck converter. It is widely used in designs prioritizing efficiency and reduced thermal management complexity compared to linear alternatives.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575S-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2575SX-5.0?

The maximum input voltage is 40 V.

Does the LM2575SX-5.0 support external shutdown?

Yes, the device includes a shutdown pin that allows for external control to reduce quiescent current.