MIC2207_10 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – 3mm x 3mm 2MHz 3A PWM Buck Regulator

MIC2207
3mm x 3mm 2MHz 3A PWM Buck
Regulator
General Description
The Micrel MIC2207 is a high-efficiency PWM buck (step-
down) regulators that provides up to 3A of output current.
The MIC2207 operates at 2MHz and has proprietary
internal compensation that allows a closed loop bandwidth
of over 200KHz.
The low on-resistance internal p-channel MOSFET of the
MIC2207 allows efficiencies over 94%, reduces external
components count and eliminates the need for an
expensive current sense resistor.
The MIC2207 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 MIC2207 is available in the exposed pad 12-pin
3mm x 3mm MLF^® package with a junction operating
range from –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• 2.7 to 5.5V supply voltage
• 2MHz PWM mode
• Output current to 3A
• >94% efficiency
• 100% maximum duty cycle
• Adjustable output voltage option down to 1V
• Ultra-fast transient response
• Ultra-small external components
Stable with a 1µH inductor and a 4.7µF output capacitor
• Fully integrated 3A 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
• DDR Power Supply
Typical Application
MIC2207
3A 2MHz Buck Regulator
MIC2207
3.3V Efficiency
96
OUT
94
4.5V
IN
92
90
5V
IN _5.5V
IN
88
86
84
82
80
0 0.5 1 1.5 2 2.5 3
OUTPUT CURRENT (A)
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
April 2010
M9999-041910