LM2576T-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576T-3.3/NOPB is a monolithic integrated circuit step-down (buck) switching regulator from the Texas Instruments SIMPLE SWITCHER family, housed in a TO-220-5 through-hole package. It provides a fixed 3.3V output with a guaranteed maximum load current of 3A. The device operates within an input voltage range of 4V to 40V and utilizes a fixed-frequency internal oscillator at 52kHz. Key electrical specifications include a typical quiescent current of 5mA, a guaranteed output voltage tolerance of ±4%, and an operating temperature range spanning from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Provides a high-efficiency replacement for popular three-terminal linear regulators, substantially reducing heat sink size requirements.
• Requires only four external components due to included internal frequency compensation and a fixed-frequency oscillator.
• Features cycle-by-cycle current limiting and thermal shutdown protection for comprehensive fault condition safety.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Pre-regulator circuits for switching regulators
• Efficient straight-through DC/DC converters

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix 'NOPB' confirms compliance with RoHS standards and absence of lead. Confirm the specific suffix indicates the TO-220-5 through-hole package variant rather than surface-mount options. Ensure the part number matches the fixed 3.3V output requirement, as other suffixes denote different voltages or packages.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required with up to 3A load capacity. It is suitable for designs needing a wide input voltage range up to 40V. Consider the TO-220-5 package for through-hole assembly needs. Verify that the 52kHz switching frequency aligns with the available standard inductor series optimized for the LM2576 family.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576 series of SIMPLE SWITCHER regulators, designed to simplify switch-mode power supply design. The series includes fixed voltage versions (3.3V, 5V, 12V) and an adjustable version. The 'T' suffix denotes the TO-220-5 package, while 'NOPB' indicates lead-free and RoHS-compliant manufacturing by Texas Instruments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576T-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2576T-3.3/NOPB?

The maximum input voltage is 40V.

Does the LM2576T-3.3/NOPB support external shutdown?

Yes, it includes an external shutdown feature with a typical standby current of 50µA.