lm2678 voltage regulator

LM2678 Voltage Regulator Circuit

The LM2678 series of regulators are monolithic integrated circuits for a step-down switching voltage regulator capable of driving up to 5A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3V, 5V and 12V and an adjustable output version.

LM2678 12vdc 5amp voltage regulator schematic

lm2678 voltage regulator

LM2678 features

  • Efficiency up to 92%
  • Simple and easy to design with (using off-the-shelf external components)
  • 120 mΩ DMOS output switch
  • 3.3V, 5V and 12V fixed output and adjustable (1.2V to 37V ) versions
  • 50μA standby current when switched OFF
  • ±2%maximum output tolerance over full line and load conditions
  • Wide input voltage range: 8V to 40V
  • 260 KHz fixed frequency internal oscillator
LM2678 applications
  • Simple to design, high efficiency (>90%) step-down switching voltage regulators
  • Efficient system pre-regulator for linear voltage regulators
  • Battery chargers


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