MP2910 Datasheet, PDF (1/15 Pages) Monolithic Power Systems – Synchronous Buck PWM DC-DC and Linear Power Controller

The Future of Analog IC Technology
DESCRIPTION
The MP2910 is a dual output with one
synchronous buck PWM and one linear
controller. The part is used to generate logic-
supply voltages for PC based systems. MP2910
includes internal soft-start, frequency-
compensation networks, power good signaling
with specific sequence, and it comes all of the
logic control, output adjustment, power
monitoring and protection functions into a small
footprint package. The part is operated at fixed
300 kHz frequency providing an optimum
compromise between efficiency, external
component size, and cost. The linear controller
is implemented to drive an external MOSFET
for regulation and it's adjustable by setting
external resistors. Moreover the specific internal
PG sequence and indicator is also implemented
to conform to Intel® new platform requirement
on FSB_VTT power plane. An adjustable over-
current protection (OCP) is proposed to monitor
the voltage drop across the R_DS(ON) of the lower
MOSFET for synchronous buck PWM DC-DC
controller.
MP2910
Synchronous Buck PWM DC-DC
and Linear Power Controller
FEATURES
 Operating with 5V or 12V Supply Voltage
 Drives ALL Low Cost N-Channel MOSFETs
 Voltage Mode PWM Control
 300kHz Fixed Frequency Oscillator
 Fast Transient Response:
High speed GM Amplifier
Full 0 to 100% Duty Ratio
 Internal Soft-Start
 Adaptive Non-Overlapping Gate Driver
 Over-Current Fault Monitor on MOSFET, No
Current Sense Resistor Required
 Specific Power Good Indicator for Intel®
Grantsdale FSB_VTT Power Sequence
 Available in a SOIC-14 Package and a
SOIC8E Package.
APPLICATIONS
 Graphic Card
 Motherboard, Desktop Servers
 IA Equipments
 Telecomm Equipments
 High Power DC-DC Regulators
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Monolithic Power Systems, Inc.
MP2910 Rev. 1.0
www.MonolithicPower.com
1
12/14/2011
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