General Description
●The LM2672 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.
●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
●Typical Applications
●■ Simple High Efficiency (>90%) Step-Down (Buck) Regulator
●■ Efficient Pre-Regulator for Linear Regulators
