LM2576HVS-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576HVS-3.3/NOPB is a SIMPLE SWITCHER step-down voltage regulator from Texas Instruments, designed for high-voltage input applications up to 60V. It delivers a fixed 3.3V output at a maximum current of 3A with an internal switching frequency of 52kHz. The device operates within an extended temperature range of -40°C to +125°C and features a shutdown pin for power management. Packaged in the TO-263 (D²PAK) surface-mount format, it integrates a 3A power switch and requires minimal external components for efficient buck conversion.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 3A power switch enables compact design with reduced component count
• Fixed 3.3V output option eliminates external resistor network requirements
• High efficiency operation supported by low on-resistance internal switch
• Built-in thermal shutdown and current limit protection ensures reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for high-voltage bus systems
• Pre-regulation stages for downstream linear regulators
• Battery-powered equipment requiring wide input voltage tolerance
• Industrial control systems operating in harsh environments

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'HVS' confirms the high-voltage variant rated for 60V inputs, distinct from standard LM2576 models. Confirm 'NOPB' indicates lead-free and RoHS compliance status as per manufacturer specifications. Ensure the package designation matches the required TO-263 footprint for PCB layout compatibility. Cross-reference the datasheet revision date to confirm technical parameters align with current production standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model when input voltages exceed 40V but remain below 60V, requiring a robust buck topology. The fixed 3.3V output is suitable for digital logic supplies where precise voltage levels are critical without external adjustment. Consider the TO-263 package for its balance of thermal performance and surface-mount convenience compared to through-hole alternatives. Evaluate the 52kHz switching frequency against EMI constraints and inductor size requirements for the specific application.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2576 family of monolithic integrated circuits, specifically the high-voltage HVS series. Unlike the standard LM2576 limited to 40V, the HVS variant supports inputs up to 60V, expanding its utility in automotive and industrial sectors. The SIMPLE SWITCHER architecture simplifies design by integrating the controller and power switch into a single package, reducing board space and design complexity.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576HVS-3.3/NOPB is functionally equivalent to LM2576HVS-3.3. Verify pinout compatibility when substituting with other Buck converters like the LM2596HV, noting differences in switching frequency and thermal characteristics.