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LM2679 - SIMPLE SWITCHER 5A Step-Down Voltage Regulator

This page provides the datasheet information for the LM2679, a member of the LM2 SIMPLE SWITCHER 5A Step-Down Voltage Regulator family.

Datasheet Summary

Description

The LM2679 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 5A loads with excellent line and load regulation characteristics.

Features

  • include the ability to reduce the input surge current at power-ON by adding a softstart timing capacitor to gradually turn on the regulator. The LM2679 series also has built in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is guaranteed to a ± 2% tolerance. The clock frequency is controlled to within a ± 11% tolerance. Features n Efficiency up to 92% n Simple and easy to des.

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Datasheet Details

Part number LM2679
Manufacturer National Semiconductor
File Size 355.82 KB
Description SIMPLE SWITCHER 5A Step-Down Voltage Regulator
Datasheet download datasheet LM2679 Datasheet
Additional preview pages of the LM2679 datasheet.

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Full PDF Text Transcription

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LM2679 SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit March 2000 LM2679 SIMPLE SWITCHER ® 5A Step-Down Voltage Regulator with Adjustable Current Limit General Description The LM2679 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 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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