LM2678S-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2678S-12/NOPB is a SIMPLE SWITCHER power regulator from Texas Instruments, configured as a fixed-output step-down DC/DC converter. It delivers a stable 12 V output with a maximum load current of 5 A. The device operates within an input voltage range of 8 V to 40 V and utilizes a buck topology at a switching frequency of 260 kHz. Designed for surface-mount installation in a TO-263-7 package, it supports an operating temperature range from -40°C to +125°C. The component features a typical quiescent current of 4.2 mA and includes integrated shutdown functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-efficiency DMOS power switch to minimize conduction losses and thermal stress during operation.
• Incorporates internal compensation circuitry to simplify external component selection and reduce board space requirements.
• Features a built-in 150 mA reference current source to facilitate the use of low-cost external components.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems requiring 12 V distribution
• Battery-powered equipment utilizing buck conversion from higher voltage sources
• Industrial control modules needing isolated or regulated power rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status according to the manufacturer's latest documentation. Confirm the package designation matches the required TO-263-7 footprint for PCB layout compatibility. Ensure the fixed 12 V output variant aligns with the target system voltage requirements before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required without external feedback resistor networks. The TO-263-7 package provides adequate thermal dissipation for 5 A loads under standard airflow conditions. Consider the 260 kHz switching frequency for balancing component size against electromagnetic interference constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2678 family of monolithic integrated circuits designed for simple step-down switching regulator applications. The series offers various fixed voltage options and adjustable variants, sharing common internal architecture and control logic. The LM2678S-12/NOPB specifically addresses applications requiring a precise 12 V rail with high efficiency and minimal external component count.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678S-12/NOPB is functionally equivalent to LM2678SX-12/NOPB regarding electrical performance and pinout configuration.