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
