LM2576HVSX-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576HVSX-3.3/NOPB is a SIMPLE SWITCHER step-down voltage regulator from Texas Instruments, operating at a fixed 3.3V output with a maximum load current of 3A. It supports an input voltage range of 4V to 60V and utilizes a buck topology. The device features a switching frequency of 52kHz and operates within a temperature range of -40°C to +125°C. Packaged in a surface-mount TO-263 (D2PAK) format, it integrates internal compensation and protection functions including thermal shutdown and current limiting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage power switch for simplified design
• Fixed 3.3V output option eliminates external feedback resistors
• Internal frequency compensation reduces external component count
• Built-in thermal shutdown and cycle-by-cycle current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for distributed power systems
• Pre-regulator stages for downstream switching regulators
• Battery-powered equipment requiring efficient step-down conversion
• General-purpose 3.3V power supply generation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'SX' confirms the tape-and-reel packaging variant rather than tube. Confirm the 'NOPB' designation indicates lead-free and RoHS compliance. Ensure the manufacturer is Texas Instruments to avoid counterfeit components. Cross-reference the full part number against official TI databases for accurate ordering information.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required with up to 3A load capability. The high input voltage tolerance suits applications with wide input ranges. The TO-263 package provides adequate thermal performance for moderate power dissipation. Consider the 52kHz switching frequency for balancing efficiency and passive component size.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576HV series of SIMPLE SWITCHER regulators. It shares architectural similarities with other members like the LM2576HVS-ADJ but offers a fixed output voltage. The series is designed for high-efficiency DC-DC conversion with minimal external components compared to traditional linear regulators or older switching topologies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible alternatives include the LM2576HVS-3.3/NOPB (tube package) or LM2576T-3.3/NOPB (TO-220 package). Verify thermal requirements and packaging preferences before substitution. Other series like LM2596 offer similar functionality but may differ in input voltage limits or switching frequencies.