MIC22200 Datasheet, PDF (1/22 Pages) Micrel Semiconductor – 2A Integrated Switch Synchronous Buck Regulator with Frequency Programmable from 800kHz to 4MHz

MIC22200
2A Integrated Switch Synchronous
Buck Regulator with Frequency
Programmable from 800kHz to 4MHz
General Description
Features
The Micrel MIC22200 is a high-efficiency, 2A integrated
switch synchronous buck (step-down) regulator. The
MIC22200 switching frequency is programmable from
800kHz to 4MHz, allowing the customer to optimize their
designs either for efficiency or for the smallest footprint.
The regulator achieves efficiencies as high as 95% while
still switching at 1MHz over a broad load range.
• Input voltage range: 2.6V to 5.5V
• Adjustable output voltage option down to 0.7V
• Output load current to 2A
• Full sequencing and tracking capability
• Easy RC compensation
• Power-On-Reset (POR) output
The ultra high-speed control loops keep the output voltage
within regulation even under the extreme transient load
swings commonly found in FPGAs and low-voltage ASICs.
The output voltage can be adjusted down to 0.7V to
address all low-voltage power needs.
The MIC22200 offers a full range of sequencing and
tracking options. The EN/DLY pin, combined with the
Power-On-Reset (POR) pin, allows multiple outputs to be
sequenced in many ways during turn on and turn off. The
RC (ramp control) pin allows the device to be connected to
another device in the MIC22X00 family of products to keep
the output voltages within a certain delta V on start up.
The MIC22200 is available in a 3mm × 3mm 12-pin MLF^®
package with a junction operating range from –40°C to
• Efficiency >90% across a broad load range
• Operating frequency: Programmable from 800 kHz up to
4MHz
• Ultra-fast transient response
• 100% maximum duty cycle
• Fully integrated MOSFET switches
• Micropower shutdown
• Thermal-shutdown and current-limit protection
• Available in Pb-free 3mm × 3mm MLF-12-pin MLF^®
Package
• –40°C to +125°C junction temperature range
Applications
+125°C.
• High power density point-of-load conversion
Data sheets and support documentation can be found on _{• Servers/routers}
Micrel’s web site at www.micrel.com.
• DVD recorders and multimedia players
• Computing peripherals
• Base stations
• FPGAs, DSP and low voltage ASIC devices
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Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
December 2010
M9999-120310-C