LM2672 series voltage regulator is a monolithic integrated circuit manufactured by LMDMOS process. These regulators offer all the active features of step-down (step-down) switching regulators, capable of driving 1A load current with excellent line and load regulation. These devices are available in 3.3V, 5.0V, 12V fixed output voltage and adjustable output versions. These regulators require a minimum number of external components, are simple to use, and include patented internal frequency compensation (patents No. 5,382,918 and 5,514,947), fixed frequency oscillators, external shutdown, soft start, and frequency synchronization.
Typical Application
The LM2672 series operates at 260 KHZ switching frequencies, thus allowing a smaller size filter assembly than what is needed for low-frequency switching regulators. Because of its very high efficiency. 90%), traces of copper on the printed circuit board are the only heat sink required. The standard series of inductors used with the LM2672 is available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ics.
Connection Diagrams
The data sheet also includes guidelines for selectors for diodes and capacitors operating in switching mode power supplies. Additional features include a guaranteed tolerance of ±1.5% of the output voltage at specified input voltage and output load conditions, and a tolerance of ±10% of the oscillator frequency. Including external shutdown, with typical standby current of 50 μA. Output switches include current limiting, as well as hot shutdown, for full protection under failure conditions. In order to simplify the design program of LM2672 step-down voltage regulator, the existing computer design software LM267X Made Simple version 6.0.
Block Diagram
Features
● Efficiency up to 96%
● Available in SO-8, 8-pin DIP and LLP packages
● Computer Design Software LM267X Made Simple version 6.0
● Simple and easy to design with
● Requires only 5 external components
● Uses readily available standard inductors
● 3.3V, 5.0V, 12V, and adjustable output versions
● Adjustable version output voltage range: 1.21V to 37V
● ±1.5% max output voltage tolerance over line and load conditions
● Guaranteed 1A output load current
● 0.25Ω DMOS Output Switch
● Wide input voltage range: 8V to 40V
● 260 kHz fixed frequency internal oscillator
● TTL shutdown capability, low power standby mode
● Soft-start and frequency synchronization
● Thermal shutdown and current limit protection
