LM2678SD-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678SD-12/NOPB is a SIMPLE SWITCHER 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 output voltage of 12 V at up to 5 A load current. The device utilizes a buck topology with a switching frequency of 260 kHz. It is housed in a VSON-14 surface-mount package and supports operation from -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-efficiency DMOS power switch for low conduction losses
• Includes internal compensation to minimize external component count
• Features thermal shutdown protection for enhanced reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• Power supply stages for embedded systems
• Distribution bus conversion in telecommunications infrastructure

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix /NOPB indicates lead-free composition and RoHS compliance. Confirm the SD package variant matches the required VSON-14 footprint. Ensure the -12 designation corresponds to the fixed 12 V output requirement. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and revision status before procurement.

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. The 5 A current capability suits moderate power applications. The VSON-14 package is appropriate for space-constrained PCB layouts. Consider the 260 kHz switching frequency for inductor size trade-offs. Verify that the thermal performance meets the application's ambient temperature requirements within the specified operating range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 series of monolithic integrated switching regulators. The series offers active functions for all step-down switching regulator designs. Other variants in the family include different fixed output voltages such as 3.3 V and 5 V, as well as adjustable versions. The SD suffix specifically denotes the VSON-14 surface-mount package type used in this configuration.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678SD-5.0/NOPB: Provides 5 V output instead of 12 V. LM2678SD-3.3/NOPB: Provides 3.3 V output instead of 12 V. LM2678SX-ADJ/NOPB: Adjustable output in TO-263 package.