LM2576HVS-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576HVS-3.3/NOPB is a monolithic integrated circuit step-down switching regulator from the Texas Instruments SIMPLE SWITCHER series, designed to drive a 3A load with excellent line and load regulation. It operates with an input voltage range of 4V to 60V and provides a fixed 3.3V output. The device features a 52kHz fixed-frequency internal oscillator, requiring only four external components for implementation. It includes built-in protection mechanisms such as thermal shutdown and current limiting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Fixed 3.3V output voltage option within the high-voltage LM2576HV series
• Integrated 52kHz fixed-frequency oscillator simplifies design
• Built-in thermal shutdown and cycle-by-cycle current limiting for fault protection
• TTL shutdown capability enables low-power standby mode

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load DC/DC conversion modules
• Pre-regulators for linear post-regulators
• Battery-powered systems requiring efficient step-down conversion
• General-purpose power supply designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) to confirm lead-free compliance and RoHS status. Ensure the package type matches the PCB footprint requirements, typically TO-263 or TO-220 variants. Confirm the manufacturer source is authorized to avoid counterfeit components. Check datasheet revisions for any updates in electrical characteristics or recommended operating conditions prior to final procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from a wide input voltage range up to 60V. It is suitable for applications needing 3A continuous current with minimal external component count. Consider thermal management solutions due to power dissipation at high input-output differentials. Compare against adjustable versions if variable output is needed later.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576HV family of non-synchronous buck converters. It serves as a high-efficiency alternative to traditional linear regulators, significantly reducing heat generation. The series is known for its simplicity, requiring few external passive components. It is widely used in industrial and commercial equipment where reliable step-down regulation is critical.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576HVS-3.3/NOPB is functionally equivalent to LM2576HVS-3.3 without the NOPB suffix regarding electrical performance. Cross-reference with LM2576SX-3.3 for surface-mount alternatives in the standard voltage series, noting the lower input voltage limit of 40V compared to the HV version's 60V limit.