LM2678S-5.0

Product Folder Order Now Technical Documents Tools & Software Support & Community LM2678 SNVS029K – MARCH 2000 – REVISED FEBRUARY 2017 LM2678 SIMPLE SWITCHER® High Efficiency 5-A Step-Down Voltage Regulator 1 Features 1 Efficiency Up to 92% Simple and Easy to Design Using Off-the-Shelf External Components 120-mΩ DMOS Output Switch 3.3-V, 5-V, and 12-V Fixed Output and Adjustable (1.2 V to 37 V) Versions 50-μA Standby Current When Switched OFF ±2% Maximum Output Tolerance Over Full Line and Load Conditions Wide Input Voltage Range: 8 V to 40 V 260-kHz Fixed Frequency Internal Oscillator −40 to 125°C Operating Junction Temperature Range Create a Custom Design Using the LM2678 With the WEBENCH® Power Designer 2 Applications Simple-to-Design, High Efficiency (>90%) StepDown Switching Regulators Efficient System Preregulator for Linear Voltage Regulators Battery Chargers 3 Description The LM2678 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 5-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ONresistance DMOS power switch. The series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version. The SIMPLE SWITCHER® concept provides for a complete design using a minimum number of external components. A high fixed frequency oscill...