LM2679S-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679S-12/NOPB is a SIMPLE SWITCHER® 5A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8 V to 40 V and provides a fixed 12 V output at up to 5 A. The device features a 260 kHz switching frequency, 4.2 mA quiescent current, and supports shutdown mode. It is housed in a TO-263-7 surface-mount package and functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-efficiency DMOS power switch for step-down conversion
• Fixed 260 kHz internal oscillator allows use of small external components
• Built-in thermal shutdown and adjustable current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient pre-regulators for linear voltage regulators
• Battery charger circuits
• Post-regulation for switched-mode power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance as per Texas Instruments documentation. Confirm the 'S' designation indicates the TO-263-7 surface-mount package variant rather than through-hole or other packages. Ensure the '-12' suffix matches the required 12 V fixed output voltage for the target design.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from an 8 V to 40 V input source with up to 5 A load capacity. The TO-263-7 package is suitable for surface-mount assembly where thermal performance is managed via PCB copper planes. Consider the 260 kHz frequency for balancing component size against switching losses.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2679 series of SIMPLE SWITCHER® regulators, which are monolithic integrated circuits designed for buck topology applications. The series includes fixed voltage options (3.3V, 5V, 12V) and an adjustable version. The LM2679S-12/NOPB specifically denotes the surface-mount TO-263-7 package with a fixed 12 V output and commercial/industrial temperature rating extensions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2679S-12/NOPB is functionally equivalent to LM2679S-12. Cross-reference with LM22679 for updated designs featuring adjustable soft-start, though pinouts and external component values may differ.