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PDF LX7167 Data sheet ( Hoja de datos )
| Número de pieza | LX7167 | |
| Descripción | 2A Step-Down Converter | |
| Fabricantes | Microsemi | |
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2A Step-Down Converter
PRODUCT BRIEF
LX7167™
DESCRIPTION
High efficiency, ultra fast transient response regulator for mobile technology and System-On-
Chip (SOC) processor applications
LX7167™ is a step-down PWM switching regulator IC with integrated high side P-Channel and low side N-Channel
MOSFETs. The IC operates using a proprietary hysteretic control topology with a full load operating frequency of 3MHz
allowing small output filter components while maintaining excellent dynamic load response.
The operational input voltage range of the LX7167 is from 3V to 5.5V. The Power Save Mode (PSM) 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. A Power Good function indicates the status of the IC (output voltage level compared to the
power good threshold). In shutdown mode, current consumption is reduced to less than 1uA and the output capacitor is
discharged.
The LX7167 includes over current and short circuit protection. A cycle-by-cycle current limit followed by a Hiccup mode
operation reduces the overall power dissipation of the internal MOSFETs and protects the IC during output shorts. The
converter also incorporates thermal protection and internal digital soft start timing.
KEY FEATURES
Operational Input Supply Voltage Range: 3V - 5.5V
Patented Hysteretic Control Technology
Load Current from 0 to 2A
Increased Speed and Reduced Device Bias Currents
Integrated PMOS and NMOS in a 2 x 2 mm Package
BENEFITS
Ideal for 3.3V and 5V applications
Increases speed providing ultra fast transient response
Eliminates loop error amplifier and compensation
network delay
Minimizes filter components
Immediate response to load and line variation
Fast dynamic response supports demanding mobile
computing requirements
Eliminates bias capacitors to support small footprint
solutions essential in mobile applications
Maximizes efficiency with minimal power loss under
all current levels and light load conditions
Increases battery life
High integration minimizes PCB space and supports low
profile package requirement designs
APPLICATIONS
Mobile Computing, Notebook, Netbook, eBook, Tablets
Mobile Communication, Smart Phone
System-On-Chip (SOC) Processor Designs
High Performance HDD
Video Cards
PoE Powered Devices
Copyright 2010
Rev. 2.4 11/3/2011
Microsemi
Analog Mixed Signal Group
One Enterprise, Aliso Viejo, CA. 92656, 949-380-6100, Fax: 949-215-4996
Datasheet pdf - http://www.DataSheet4U.net/
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