LM2676S-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2676S-3.3/NOPB is a SIMPLE SWITCHER® high-efficiency 3A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 3.3V output at up to 3A. The device integrates a 1.2V reference, error amplifier, and power switch, operating at a fixed switching frequency of 260kHz. It utilizes current mode control for rapid transient response and includes thermal shutdown and current limiting protection. The component is housed in a TO-263 (D2PAK) package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a power switch capable of delivering 3A continuous load current
• Utilizes current mode control architecture for fast transient response
• Includes built-in thermal shutdown and cycle-by-cycle current limiting
• Requires minimal external components for standard buck converter configurations

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distribution bus conversion in industrial equipment
• Power supply stages for communication infrastructure
• Battery-powered devices requiring efficient voltage stepping

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'S' corresponds to the TO-263 package variant when sourcing. Confirm the '-3.3' designation ensures the fixed 3.3V output requirement. Check for the '/NOPB' indicator to ensure compliance with RoHS standards and absence of lead-based materials. Cross-reference the manufacturer part number against official TI documentation to avoid counterfeit components.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from an 8V to 40V input source. It is suitable for designs needing up to 3A of continuous current without synchronous rectification. Consider the TO-263 package for its thermal performance in space-constrained applications. Evaluate if the 260kHz switching frequency aligns with EMI constraints and inductor size requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM267x series of SIMPLE SWITCHER regulators, which are designed for high-efficiency step-down applications. The series offers various output voltage options and packages, including D2PAK and VSON. The LM2676 specifically targets 3A loads, distinguishing it from lower-current variants like the LM2674 or higher-current models like the LM2679.

Voltage Regulators - DC DC Switching Regulators FAQ

Is the LM2676S-3.3/NOPB a synchronous rectifier?

No, the LM2676 series uses a non-synchronous design with an internal power switch and an external catch diode.

What is the minimum input voltage for this regulator?

The minimum recommended input voltage is 8V to ensure proper operation and regulation.