LM3668SDX-4550/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3668SDX-4550/NOPB is a Texas Instruments switching voltage regulator featuring a dual-mode single inductor buck-boost topology. It provides a fixed output of 4.5 V and 5 V with a maximum output current of 1 A. The device operates from an input voltage range of 2.5 V to 5.5 V at a switching frequency of 2.2 MHz. It includes shutdown functionality with a quiescent current of 45 uA. The component is housed in a 12-WSON package and supports operation between -40°C and +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Dual-mode single inductor buck-boost converter architecture
• Integrated synchronous rectification for high efficiency
• Programmable output voltage capability via external resistors
• Low standby current consumption during shutdown

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered devices requiring stable voltage regulation
• Systems utilizing single-cell lithium-ion or lithium-polymer batteries
• Applications necessitating efficient power management across varying input levels

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix designation against official documentation, as variations may exist within the LM3668 family. Confirm that the component status aligns with design requirements, noting that similar variants in this series are marked as not recommended for new designs. Ensure compatibility with the intended PCB footprint and thermal management strategy before finalizing procurement decisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is required for regulating voltages above and below the input source. The dual-mode operation optimizes efficiency across light and heavy loads. Verify that the 1 A output current meets load demands and that the 2.2 MHz frequency allows for appropriate passive component sizing. Ensure the operating temperature range suits the environmental conditions of the target application.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3668 series of DC/DC converters designed for space-constrained portable electronics. It shares architectural similarities with other Texas Instruments buck-boost regulators but is distinguished by its specific output configuration and package type. The series focuses on providing high efficiency and low quiescent current for extended battery life in mobile applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers for this specific variant are not available in the provided data. Designers should consult official replacement guides or contact the manufacturer directly for qualified alternatives.