LM2576HVSX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576HVSX-5.0/NOPB is a Texas Instruments SIMPLE SWITCHER power converter, a monolithic integrated circuit designed for buck switching regulator applications. It supports an input voltage range of 4 V to 63 V and delivers a fixed 5 V output with a maximum load current of 3 A. Operating at a typical frequency of 52 kHz, the device features internal frequency compensation and fixed-frequency control. It includes thermal shutdown and current limit protection, housed in a TO-263-5 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage switch capable of driving 3 A loads with minimal external components
• Fixed 52 kHz oscillating frequency simplifies filter design and reduces component size
• Internal frequency compensation eliminates the need for external compensation networks
• Built-in thermal shutdown and cycle-by-cycle current limiting for robust fault protection

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring step-down conversion from higher bus voltages
• Efficient pre-regulators for downstream linear regulators
• Battery-powered systems utilizing high-input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' confirms lead-free and RoHS compliance status as per the manufacturer's datasheet. Confirm the 'HV' designation indicates the extended 63 V input capability distinct from standard variants. Ensure the 'SX' suffix corresponds to the TO-263-5 surface mount package type required for your PCB layout. Cross-reference the specific revision level if critical timing parameters are involved.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an input voltage exceeds the 40 V limit of standard LM2576 devices but remains below 63 V. The fixed 5 V output makes it suitable for powering 5 V logic or analog circuits directly from higher voltage rails. Consider the TO-263-5 package for its balance of thermal performance and surface-mount convenience compared to through-hole options.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576HV series, which extends the input voltage range of the classic LM2576 family. While the standard LM2576T-5.0/NOPB handles up to 40 V, the HV variant accommodates inputs up to 63 V. It shares the same 3 A current rating and 5 V fixed output architecture, serving as a direct high-voltage alternative for industrial and automotive applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576S-5.0 is a pin-to-pin compatible alternative but operates with a lower maximum input voltage of 40 V. Verify that the system input voltage does not exceed the limits of the substitute device during transient conditions.