LM2678SD-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SD-ADJ/NOPB is a SIMPLE SWITCHER® step-down switching voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8 V to 40 V and provides an adjustable output voltage from 1.21 V to 37 V. The device supports a maximum output current of 5 A with a fixed switching frequency of 260 kHz. It utilizes a VSON-14 surface-mount package and functions within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch capable of delivering up to 5 A
• Fixed internal switching frequency eliminates external timing components
• Adjustable output voltage via external resistor divider network
• Built-in thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distributed power architectures requiring step-down conversion
• Battery-powered equipment with wide input voltage ranges
• Industrial control systems operating in harsh environments

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SD' confirms the VSON-14 package variant, as other suffixes indicate different physical footprints. Ensure the 'NOPB' designation is present to confirm lead-free and RoHS compliance status. Cross-reference the manufacturer part number against official datasheets to validate the adjustable output configuration before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact surface-mount solution is required for high-current buck applications. The VSON-14 package offers space efficiency compared to through-hole alternatives. Consider the 260 kHz switching frequency for balancing component size and efficiency. Verify that the load requirements do not exceed the 5 A continuous current rating under all operating conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 family of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. The SD suffix specifically denotes the VSON-14 package, distinguishing it from the S (TO-263) or T (TO-220) variants. The ADJ suffix indicates an adjustable output voltage, whereas fixed voltage versions use numeric codes like 5.0 or 12.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678S-ADJ/NOPB: Identical electrical specifications but uses a TO-263-7 package instead of VSON-14. Requires PCB layout adaptation due to different pinout and thermal pad dimensions.