MIC2208 Datasheet, PDF (1/19 Pages) Micrel Semiconductor – 3mmx3mm 1MHz 3A PWM Buck Regulator

MIC2208
3mmx3mm 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 3mm x
3mm MLF-12L package with a junction operating
range from –40°C to +125°C.
Typical Application
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 3mm x 3mm MLF-10L package
• –40°C to +125°C junction temperature range
• Internal soft-start
Applications
• 5V or 3.3V Point of Load Conversion
• Telecom/Networking Equipment
• Set Top Boxes
• Storage Equipment
• Video Cards
MIC2208
3A 1MHz Buck Regulator
MLF and MicroLeadFrame are trademarks of Amkor Technology
Micrel, Inc • 2180 Fortune Drive • San Jose, Ca 95131 • USA • tel [phone] • fax [phone] • http://www.micrel.com
September 2005
M9999-092905
www.micrel.com