LM2576HVT-12/LF03

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576HVT-12/LF03 is a SIMPLE SWITCHER power regulator from Texas Instruments, functioning as a monolithic integrated circuit for step-down switching applications. It supports an input voltage range of 4V to 60V and delivers a fixed 12V output at up to 3A load current. The device utilizes a 52kHz fixed-frequency internal oscillator and operates within a junction temperature range of -40°C to +125°C. It is housed in a TO-220 package with five pins (LF03 suffix). Key electrical specifications include a typical quiescent current of 5mA and standby current of 50µA when shutdown is enabled.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage switch capable of driving 3A loads with minimal external component requirements.
• Fixed 52kHz internal oscillator eliminates the need for external timing components.
• Includes thermal shutdown and cycle-by-cycle current limiting for comprehensive fault protection.
• Features an external shutdown pin that reduces standby current to approximately 50µA.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring efficient buck conversion
• Pre-regulators for linear regulators to improve efficiency
• Standard 5V, 12V, or 24V bus conversion circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the LF03 suffix indicates the specific TO-220-5 through-hole package variant. Confirm the part number includes the /NOPB designation if RoHS compliance is required by your manufacturing standards. Ensure the supplier provides original manufacturer documentation to validate authenticity and traceability before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring wide input voltage ranges up to 60V and high output currents. The fixed 12V output simplifies design compared to adjustable versions. Consider the thermal performance of the TO-220 package for heat dissipation needs. Verify compatibility with standard inductor values optimized for the 52kHz switching frequency.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576HV series, which offers higher input voltage capability than the standard LM2576. The 'HVT' denotes High Voltage Through-hole construction. The '12' specifies the fixed 12V output voltage. The 'LF03' identifies the physical package type as TO-220 with five pins.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576HVT-12/NOPB is a direct equivalent offering RoHS-compliant manufacturing. LM2576HVSX-12/NOPB serves as a surface-mount alternative using the TO-263 package. Standard LM2576T-12/NOPB is compatible but limited to a 40V maximum input voltage.