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MIC22705YML Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC22705YML Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 29 page MIC22705 1MHz, 7A Integrated Switch High-Efficiency Synchronous Buck Regulator 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 MIC22705 is a high-efficiency, 7A integrated switch synchronous buck (step-down) regulator. The MIC22705 is optimized for highest efficiency, achieving more than 95% efficiency while still switching at 1MHz. The ultra-high speed control loop keeps the output voltage within regulation even under the extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage is pre-bias safe and can be adjusted down to 0.7V to address all low-voltage power needs. The MIC22705 offers a full range of sequencing and tracking options. The Enable/Delay (EN/DLY) pin, combined with the Power Good (PG) pin, allows multiple outputs to be sequenced in any way during turn-on and turn-off. The Ramp Control™ (RC) pin allows the device to be connected to another product in the MIC22xxx and/or MIC68xxx family, to keep the output voltages within a certain ∆V on start-up. The MIC22705 is available in a 24-pin 4mm x 4mm MLF ® 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: 2.9V to 5.5V • Output voltage adjustable down to 0.7V • Output load current up to 7A • Safe start-up into a pre-biased output load • Full sequencing and tracking capability • Power Good output • Efficiency >95% across a broad load range • Ultra-fast transient response • Easy RC compensation • 100% maximum duty cycle • Fully-integrated MOSFET switches • Thermal-shutdown and current-limit protection • 24-pin 4mm x 4mm MLF® • –40°C to +125°C junction temperature range Applications • High power density point-of-load conversion • Servers, routers, and base stations • DVD recorders / Blu-ray players • Computing peripherals • FPGAs, DSP and low-voltage ASIC power _________________________________________________________________________________________________________________________ Typical Application MIC22705 7A 1MHz Synchronous Output Converter Efficiency (VIN = 5.0V) vs. Output Current 50 55 60 65 70 75 80 85 90 95 100 0123 456 7 OUTPUT CURRENT (A) 2.5V 3.3V VIN = 5.0V March 2011 M9999-033111-A |
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