LM2678LD-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678LD-12 is a monolithic integrated circuit step-down voltage regulator from the SIMPLE SWITCHER series. It operates with an input voltage range of 8V to 40V and provides a fixed 12V output at up to 5A load current. The device utilizes low on-resistance DMOS power switches to achieve efficiency exceeding 90%. It features a switching frequency of 260kHz, enabling the use of compact external components. The regulator includes thermal shutdown and current limit protection for robust operation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates all active functions for a buck converter topology in a single IC
• Utilizes low on-resistance DMOS power switch for high efficiency
• Includes built-in thermal shutdown and current limiting protection

Voltage Regulators - DC DC Switching Regulators Applications

• Embedded control systems requiring regulated DC power
• Battery-powered equipment needing efficient voltage reduction
• Post-regulation stages for distributed power architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin as National Semiconductor or Texas Instruments, noting that TI acquired NS. Confirm the LLP-14 package type and fixed 12V output specification. Ensure the part number suffix matches the specific lead-free or RoHS compliance status required for your assembly process. Cross-reference the datasheet revision to confirm pinout compatibility.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required from an 8V to 40V input source. It is suitable for applications demanding high efficiency and moderate current up to 5A. Consider the LLP-14 package constraints for thermal management and PCB layout. Compare against adjustable variants if flexible output voltage is needed instead of the fixed 12V configuration.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 family of SIMPLE SWITCHER regulators. The 'LD' suffix indicates the LLP-14 surface-mount package, while '12' denotes the fixed 12V output version. The family shares common internal architecture but varies by package and output voltage options such as 3.3V, 5V, and adjustable versions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678SD-12/NOPB offers identical electrical performance in a VSON-14 package. LM2678T-12/NOPB provides the same functionality in a TO-220-7 through-hole package. Verify thermal dissipation requirements when substituting packages with different heat sinking capabilities.