Description
LX7167 is a step-down PWM Switching Regulator
IC with integrated high side P-CH and low side NCH
MOSFETs. The IC operates using a hysteretic
control topology with a full load operating switching
frequency of 3MHz allowing small output filter
components while maintaining excellent dynamic
load response.
The operational input voltage range of LX7167 is
from 3V to 5.5V. The part has a Power Save Mode
(PSM) that automatically transitions between PWM
and PSM mode depending on the load current. This
allows the converter’s efficiency to remain high
when load current drops. There is a Power Good
function to indicate the status of the IC.
In the shutdown mode, the IC’s current consumption
is reduced to less than 1μA and the output capacitor
is discharged.
Other features of the part are: a) Cycle-by-cycle
current limit followed by HICCUP mode which
reduces the overall power dissipation of the internal
MOSFETs, b) thermal protection and internal digital
soft start.
The LX7167 is available in a 2mm x 2mm 8 pin
exposed pad DFN package.

Features
 2.4A Step-down Regulator
 Operational Input Supply Voltage Range:
3V-5.5V
 Integrated PMOS and NMOS
 Load Current from Zero to 2.4A
 3MHz Switching Frequency
 SKIP Pulse to Improve Light Load
Efficiency
 Input UVLO and OV Protection
 Enable Pin
 Power Good
 Internal Soft-start
 Cycle-by-Cycle Over Current Protection
 Hiccup Mode Operation Under FB UVLO
 RoHS Compliant for Pb Free

Applications
 HDD
 Set-Top Box
 LCD TV’s
 Notebook/Netbook
 Routers
 Video Cards
 PC Peripherals
 PoE Powered Devices Smart Phone