MIC4721

www.DataSheet4U.com MIC4721 1.5A 2MHz Integrated Switch Buck Regulator General Description The Micrel MIC4721 is a high efficiency PWM buck (stepdown) regulators that provides up to 1.5A of output current. The MIC4721 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 MIC4721 allows efficiencies up to 94%, reduces external components count and eliminates the need for an expensive current sense resistor. The MIC4721 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 lowdropout conditions. The MIC4721 is available in the 10-pin MSOP 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 1.5A Up to 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 1.5A MOSFET switch Micropower shutdown Power Good pin Thermal shutdown and current limit protection Pb-free 10-pin MSOP package –40°C to +125°C junction temperature range Applications FPGA/DSP/ASIC applications General point of load Broadband communications DVD/...