LM2674MX-5.0/NOPB

The LM2674 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 500-mA load current with excellent line and
load regulation. These devices are available in fixed
output voltages of 3.3 V, 5 V, 12 V, and an adjustable
output version.
Requiring a minimum number of external
components, these regulators are simple to use and
include patented internal frequency compensation and
a fixed frequency oscillator.
The LM2674 series operates at a switching frequency
of 260 kHz, thus allowing smaller sized filter
components than what is required with lower
frequency switching regulators. Because of very high
efficiency (> 90%), the copper traces on the printedcircuit board are the only heat sinking required.
A family of standard inductors for use with
the LM2674 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 data sheet are
selector guides for diodes and capacitors designed to
work in switch-mode power supplies.