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MIC22400 Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC22400 Datasheet(HTML) 1 Page - Micrel Semiconductor |
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1 / 28 page  MIC22400 witch Synchronous ith Frequency Programmable up to 4MHz 4A Integrated S Buck Regulator w Ramp Control is a trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( 408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com General Description The Micrel MIC22400 is a high-efficiency, 4A integrated switch synchronous buck (step-down) regulator. The MIC22400 is optimized for highest efficiency, achieving over 90% efficiency while still switching at 1MHz over a broad load range. The ultra-high-speed control loop keeps the output voltage within regulation even under 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 MIC22400 gives 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 any way on turn-on and turn-off. The Ramp Control™ (RC) pin allows the device to be connected to another MIC22400 family of products to keep the output voltages within a certain ΔV on start up. The MIC22400 is available in a 20-pin 3mm x 4mm MLF ® and thermally enhanced 20-pin e-TSSOP 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 • Input voltage range: 2.6V to 5.5V • Output voltage adjustable down to 0.7V • Output load current up to 4A • Full sequencing and tracking ability • Power-On-Reset (POR) • Efficiency > 90% across a broad load range • Programmable frequency 300kHz to 4MHz • Easy Ramp Control™ (RC) compensation • Ultra fast transient response • 100% maximum duty cycle • Fully-integrated MOSFET switches • Micropower shutdown • Thermal shutdown and current-limit protection • 20-pin 3mm x 4mm MLF® • 20-pin e-TSSOP • –40°C to +125°C junction temperature range Applications • High power density point-of-load conversion • Servers and routers • DVD recorders • Computing peripherals • Base stations • FPGAs, DSP and low-voltage ASIC power Typical Application MIC22400 4A Synchronous Buck Regulator Sequencing & Tracking December 2010 M9999-120310-F |
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