LM22676MRX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM22676MRX-5.0/NOPB is a SIMPLE SWITCHER step-down voltage regulator from Texas Instruments, operating at a fixed switching frequency of 500 kHz. It delivers a maximum output current of 3 A with a fixed output voltage of 5 V. The device accepts an input voltage range from 4.5 V to 42 V and features a typical quiescent current of 3.4 mA. Designed for surface-mount installation, it utilizes an 8-SO PowerPAD package. The component supports a positive output configuration and operates within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a power switch and control circuitry into a compact monolithic design
• Includes precision enable functionality for controlled startup sequencing
• Provides thermal shutdown protection to safeguard against overheating
• Offers cycle-by-cycle current limit protection for the internal power switch

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power architectures in industrial systems
• Board-level voltage regulation for embedded processors
• Power supplies for telecommunications equipment
• Battery-powered portable devices requiring efficient conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix matches the required tape-and-reel packaging format indicated by the 'X' designation. Confirm the specific voltage tolerance and thermal performance requirements align with the datasheet specifications. Ensure the supplier provides documentation confirming RoHS compliance and absence of halogenated substances. Cross-reference the manufacturer part number to avoid confusion with adjustable variants or different package options within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V output is required from an input rail ranging up to 42 V. The 3 A current capability suits applications needing moderate power density without external pass transistors. Consider the 8-SO PowerPAD package for improved thermal dissipation compared to standard SOIC packages. Evaluate the 500 kHz switching frequency against EMI constraints and passive component size requirements for the target design.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM22676 series of SIMPLE SWITCHER regulators, which are designed to simplify power supply design by integrating necessary control functions. The MRX variant specifically denotes the surface-mount 8-SO PowerPAD package in tape-and-reel form. It shares core electrical characteristics with other pin-compatible members of the family, differing primarily in output voltage settings and packaging configurations.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM22676MR-5.0/NOPB for tube packaging or LM22676MRE-5.0/NOPB for reel packaging. For higher efficiency needs, consider the synchronous LM2678 series. Verify that any replacement maintains the 42 V maximum input rating and 3 A output current capacity.