MP2905 Datasheet, PDF (1/16 Pages) Monolithic Power Systems – 3V-28V Input, Hysteretic Synchronous Step-Down Controller

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MP2905
3V-28V Input, Hysteretic
Synchronous Step-Down Controller
DESCRIPTION
The MP2905 is a hysteretic voltage-mode control,
synchronous PWM buck controller. The output
voltage can be regulated from 0.6V to 0.9*VIN. It
achieves high output current over a wide input
supply range from 3V-28V.
MP2905 integrates an internal LDO regulator that
makes the controller function at a wide input
supply.
Hysteretic voltage-mode control provides fast
transient response without additional loop
compensation.
An adjustable soft-start prevents inrush current at
turn-on. The device senses high-side switch
voltage drop for hiccup current limit and short
current protection. The frequency is adjustable
from 200kHz to 500kHz.
The MP2905 is available in 10-pin MSOP
package, provides a very compact system
solution with minimal reliance on external
components.
FEATURES
• Wide 3V to 28V Operating Input Range
• Output Adjustable from 0.6V to 0.9*Vin
• Switching frequency from 200kHz to 500kHz
• Programmable Soft-Start
• Hiccup current limit
• Lossless peak current sensing
• MSOP-10 package
APPLICATIONS
• Motherboard Power Supplies
• AGP and PCI-Express Power Supplies
• Graphic-Card Power Supplies
• Set-Top Boxes
• Point-of-Load Power Supplies
TYPICAL APPLICATION
MP2905 Rev. 0.91
www.monolithicpower.com
1
4/18/2011
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