Description The Micrel MIC22700 is a high efficiency 7A Integrated switch synchronous buck (step-down) regulator. The MIC22700 is optimized for highest efficiency. The device achieves more than 95% efficiency while still switching at 1MHz over a broad range. The device works with a small 1 H inductor and down to 47 F output capacitor. 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. A full range of sequencing and tracking options is available with the MIC22700. The Enable/Delay pin combined with the Power Good/POR pin allows multiple outputs to be sequenced in any way during turn-on and turn-off. The RC (Ramp Control ) 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 MIC22700 Features Input voltage range: 2.6V to 5.5V Output voltage adjustable down to 0.7V Output current up to 7A Full sequencing and tracking capability Power on Reset/Power Good Efficiency > 95% across a broad load range Ultra fast transient response - Easy RC compensation 100% maximum duty cycle Fully integrated MOSFET switches Micropower shutdown Thermal shutdown and current limit protection 24-pin 4mm x 4mm MLF -40C to +125C junction temperature range Applications High power density point of load conversion Servers and routers DVD recorders / Blu-Ray players Computing peripherals Base stations FPGAs, DSP and low voltage ASIC power Typical Application MIC22700 7A 1MHz Synchronous Output Converter Sequencing & Tracking 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 February 2009 M9999-021309-A Micrel, Specification for packaged product only