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LM2678

National Semiconductor
Part Number LM2678
Manufacturer National Semiconductor
Description SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
Published Mar 22, 2005
Detailed Description LM2678 SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator April 2005 LM2678 SIMPLE SWITCHER® High Efficie...
Datasheet PDF File LM2678 PDF File

LM2678
LM2678


Overview
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.
A high fixed frequency oscillator (260KHz) allows the use of physically smaller sized components.
A family of standard inductors for use with the LM2678 are available from several manufacturers to greatly simplify the design process.
The LM2678 series also has built in thermal shutd...



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