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LM2678 - SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

This page provides the datasheet information for the LM2678, a member of the LM2 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator family.

Datasheet Summary

Description

The LM2678 series of regulators are monolithic integrated circuits which provide all of the active functions for a stepdown (buck) switching regulator capable of driving up to 5A loads with excellent line and load regulation characteristics.

Features

  • n Efficiency up to 92% n Simple and easy to design with (using off-the-shelf external components) n 120 mΩ DMOS output switch n 3.3V, 5V and 12V fixed output and adjustable (1.2V to 37V ) versions n 50µA standby current when switched OFF n ±2%maximum output tolerance over full line and load conditions n Wide input voltage range: 8V to 40V n 260 KHz fixed frequency internal oscillator n.
  • 40 to +125˚C operating junction temperature range.

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Datasheet preview – LM2678

Datasheet Details

Part number LM2678
Manufacturer National Semiconductor
File Size 800.32 KB
Description SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
Datasheet download datasheet LM2678 Datasheet
Additional preview pages of the LM2678 datasheet.

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Full PDF Text Transcription

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LM2678 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator April 2005 LM2678 SIMPLE SWITCHER® High Efficiency 5A Step-Down Voltage Regulator General Description The LM2678 series of regulators are monolithic integrated circuits which provide all of the active functions for a stepdown (buck) switching 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. The SIMPLE SWITCHER concept provides for a complete design using a minimum number of external components.
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