LM3676SDX-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM3676SDX-3.3/NOPB is a fixed-output buck switching regulator manufactured by Texas Instruments, designed for step-down DC-DC conversion applications. It provides a stable 3.3V output with a maximum load current capability of 600mA. The device operates with a high switching frequency of 2MHz, enabling the use of compact external components. It features voltage-mode control and supports an input voltage range suitable for single Li-Ion cell batteries and other low-voltage rails. The component is housed in an 8-WFDFN package with an exposed pad, optimized for surface-mount technology.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• High-frequency operation at 2MHz allows for miniaturized passive component selection.
• Integrated power switch delivers up to 600mA continuous load current.
• Voltage-mode control architecture ensures stable regulation under varying load conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage digital circuits from single Li-Ion battery sources
• Point-of-load regulation in portable electronic devices
• Battery-powered consumer electronics requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including the suffix /NOPB to confirm lead-free compliance and specific tape-and-reel packaging configuration. Ensure the ordering code matches the exact voltage output and package type required for your design. Cross-reference manufacturer documentation for any recent updates to pinout or thermal recommendations before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is needed for converting higher input voltages down to 3.3V with moderate current demands. The 2MHz switching frequency distinguishes it from lower-frequency regulators by reducing inductor size. Consider thermal performance requirements due to the small DFN package footprint and ensure adequate PCB copper area for heat dissipation during operation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3676 family of step-down converters from Texas Instruments. It is distinct from the LM2679 series which offers higher current capabilities but lower switching frequencies. The LM3676 is specifically optimized for space-constrained applications where high efficiency and small component count are critical priorities for system designers.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other 3.3V fixed-output buck regulators from Texas Instruments such as the LM3485 series, provided they meet the 600mA current requirement and 2MHz switching frequency specifications. Verify pin compatibility and thermal characteristics before substitution.