MIC2208_10 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – 3mm x 3mm 1MHz 3A PWM Buck Regulator

MIC2208
3mm x 3mm 1MHz 3A PWM Buck
Regulator
General Description
The Micrel MIC2208 is a high efficiency PWM buck (step-
down) regulator that provides up to 3A of output current.
The MIC2208 operates at 1MHz and has external
compensation that allows a closed loop bandwidth of over
100kHz.
The low on-resistance internal p-channel MOSFET of the
MIC2208 allows efficiencies over 94% reduces external
component count and eliminates the need for an
expensive current sense resistor.
The MIC2208 operates from 2.7V to 5.5V input and the
output can be adjusted down to 1V. The devices can
operate with a maximum duty cycle of 100% for use in low-
dropout conditions.
The MIC2208 is available in the exposed pad 12-pin
3mm x 3mm MLF^® package with a junction operating
range from –40°C to +125°C.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• 2.7 to 5.5V supply voltage
• 1MHz PWM mode
• Output current to 3A
• >90% efficiency
• Adjustable output voltage option down to 1V
• Ultra-fast transient response
• External Compensation
• Stable with a wide range of output capacitance
• Fully integrated 5A MOSFET switch
• Micropower shutdown
• Thermal shutdown and current limit protection
• Pb-free 12-pin 3mm x 3mm MLF^® package
• –40°C to +125°C junction temperature range
Applications
• 5V or 3.3V Point of Load Conversion
• Telecom/Networking Equipment
• Set Top Boxes
• Storage Equipment
• Video Cards
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Typical Application
3A 1MHz Buck Regulator
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
May 2010
M9999-051410-D