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LM2672EP

National Semiconductor
Part Number LM2672EP
Manufacturer National Semiconductor
Description SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator
Published Nov 7, 2010
Detailed Description LM2672EP Enhanced Plastic SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features ...
Datasheet PDF File LM2672EP PDF File

LM2672EP
LM2672EP

Overview
LM2672EP Enhanced Plastic SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features August 2004 LM2672EP Enhanced Plastic SIMPLE SWITCHER ® Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features General Description The LM2672EP series of regulators are monolithic integrated circuits built with a LMDMOS process.
These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load current with excellent line and load regulation.
These devices are available in fixed output voltages of 3.
3V, 5.
0V, 12V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation (Patent Nos.
5,382,918 and 5,514,947), fixed frequency oscillator, external shutdown, soft-start, and frequency synchronization.
The LM2672EP series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators.
Because of its very high efficiency ( > 90%), the copper traces on the printed circuit board are the only heat sinking needed.
A family of standard inductors for use with the LM2672EP are available from several different manufacturers.
This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs.
Also included in the datasheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.
Other features include a guaranteed ± 1.
5% tolerance on output voltage within specified input voltages and output load conditions, and ± 10% on the oscillator frequency.
External shutdown is included, featuring typically 50 µA stand-by current.
The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.
To simplify the LM2672EP buck regulator design procedure, there exists compute...


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