LM2576SX-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576SX-3.3/NOPB is a monolithic integrated circuit step-down switching regulator from the SIMPLE SWITCHER family, manufactured by Texas Instruments. It operates with an input voltage range of 4V to 40V and provides a fixed 3.3V output at up to 3A load current. The device utilizes a 52kHz internal oscillator and employs current-mode control for rapid transient response. Packaged in a surface-mount TO-263 (D2PAK) format, it integrates a 50V rated power switch. Key protection features include thermal shutdown and cycle-by-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-voltage power switch capable of handling up to 50V
• Utilizes current-mode control architecture for fast transient response
• Includes built-in thermal shutdown and cycle-by-cycle current limiting
• Designed for direct replacement of three-terminal linear regulators

Voltage Regulators - DC DC Switching Regulators Applications

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

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer specifications. Ensure the package designation matches the required surface-mount footprint. Confirm the specific revision level against the latest datasheet to guarantee pinout compatibility and electrical parameter consistency before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from an input source between 4V and 40V. It is suitable for applications needing up to 3A continuous current with moderate efficiency requirements. Consider alternative variants if higher input voltages exceeding 40V are present or if adjustable output voltage flexibility is necessary for the design.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576 series of SIMPLE SWITCHER regulators, which are designed to simplify power supply design using off-the-shelf components. The series includes fixed voltage options and adjustable versions, catering to various industrial and commercial power management needs while reducing overall system size and cost compared to linear alternatives.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576S-3.3/NOPB: Equivalent standard voltage variant in TO-263 package.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2576SX-3.3/NOPB?

The maximum recommended input voltage is 40V.

Does this component support external frequency synchronization?

No, the LM2576SX-3.3/NOPB uses a fixed internal oscillator operating at 52kHz and does not support external synchronization.