LX7178 EVAL BOARD USER GUIDE
Microsemi
Analog Mixed Signal Group
One Enterprise Aliso Viejo, CA 92656 USA (800) 713-4113, (949) 380-6100
Page 1
Copyright
2012
Rev. 0.1, 2013-10-23
Rev. 1.0, 2013-10-23
Introduction to Product
The LX7178 is a digitally controlled step-down regulator IC with an integrated 40mΩ high-side P-
channel MOSFET and a 14mΩ low-side N-channel MOSFET. It features Microsemi’s proprietary
constant-frequency hysteretic control engine for near-instantaneous correction to line/load
transients. It does not require high-ESR output capacitors and incorporates energy-saving “PSM”
(Power Save or Pulse Skip Mode) at light loads, to extend battery life in mobile applications.
The LX7178 has an I
2
C serial interface port for output voltage margining and monitoring if
required (it can also operate in default mode). In addition it includes robust fault monitoring
functions.
The LX7178 will operate from 3V to 5.5V, and is available in a fixed output voltage option of
0.8V (no voltage divider is necessary). The output voltage can also be adjusted with an external
voltage divider up to 3.3V.
