LM2679S-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2679S-ADJ/NOPB is a Texas Instruments SIMPLE SWITCHER® step-down voltage regulator in a TO-263-7 surface-mount package. It operates with an input voltage range of 8 V to 40 V and provides an adjustable output voltage from 1.2 V to 37 V. The device supports up to 5 A output current with a fixed switching frequency of 260 kHz. Quiescent current is 4.2 mA, and it functions within a temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-efficiency DMOS power switch for direct drive of external components
• Includes programmable current limit and thermal shutdown protection mechanisms
• Features internal soft-start capability to reduce input surge currents during startup

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient pre-regulators for linear power supply systems
• Battery charging circuits
• High-efficiency point-of-load DC/DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the component status as not recommended for new designs before procurement. Confirm RoHS compliance and lead-free packaging specifications against the latest manufacturer datasheet. Ensure the TO-263-7 package variant matches the required PCB footprint and thermal management strategy for the specific application environment.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when an adjustable output voltage between 1.2 V and 37 V is required with up to 5 A load capacity. The 260 kHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the TO-263-7 package for its thermal dissipation capabilities in surface-mount applications requiring robust heat handling.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2679 series of SIMPLE SWITCHER® regulators, which are monolithic integrated circuits designed for buck topology applications. The series includes both fixed-output versions (3.3 V, 5 V, 12 V) and adjustable variants. The LM2679S-ADJ/NOPB specifically offers the flexibility of an adjustable output while maintaining the series' standard features like internal compensation and fixed-frequency operation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2679S-3.3/NOPB: Fixed 3.3 V output version in the same package family. LM2679S-5.0/NOPB: Fixed 5.0 V output version in the same package family. LM2679T-ADJ/NOPB: Adjustable output version in a through-hole TO-220-7 package.