LM2576HVT-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576HVT-3.3/NOPB is a high-voltage step-down switching regulator from Texas Instruments, part of the SIMPLE SWITCHER family. It provides a fixed 3.3V output with a maximum load current of 3A. The device operates with an input voltage range of 4.5V to 60V and features a fixed internal oscillator frequency of 52kHz. It utilizes a TO-220-5 through-hole package and supports an operating temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch capable of delivering up to 3A continuous load current
• Fixed internal oscillator for simplified design without external timing components
• Built-in thermal shutdown and cycle-by-cycle current limiting for fault protection
• External shutdown pin enables low standby current consumption

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power systems
• Pre-regulator stages for downstream switching regulators
• Efficient buck conversion for battery-powered equipment
• General-purpose DC-DC step-down power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer specifications. Confirm the package type matches the required TO-220-5 footprint for your PCB layout. Ensure the fixed 3.3V output variant aligns with your system voltage requirements, as other voltage options exist within the same series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high input voltage range up to 60V is required alongside a fixed 3.3V output. It serves as a direct replacement for linear regulators where efficiency and heat dissipation are critical concerns. Consider the through-hole TO-220-5 package if board space allows and higher thermal mass is beneficial for passive cooling applications.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2576HV series, designed as a high-efficiency alternative to traditional three-terminal linear regulators. The series simplifies switch-mode power supply design by requiring minimal external components. It integrates all active functions necessary for a complete buck converter topology, including the control circuitry and power switch.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576HVT-3.3/NOPB is functionally equivalent to LM2576HVT-3.3. Cross-reference with LM2576T-3.3/NOPB only if the lower 45V maximum input voltage rating is acceptable for the application.