MIC2225

MIC2225 2MHz 600mA Synchronous Buck Regulator with 300mA LDO General Description The Micrel MIC2225 is a dual output regulator featuring a high efficiency 2MHz PWM synchronous buck (step-down) regulator and a 300mA LDO. The MIC2225 is an ultra-low noise, small size, and high efficiency solution for portable power applications, providing core and I/O supply rails for applications like application processors, camera DSPs and multimedia chipsets. In PWM mode, the MIC2225 operates with a constant 2MHz frequency. The MIC2225 switching regulator operates from 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 600mA output current in PWM mode. The MIC2225 is available in the 10-pin 2mm x 2mm Thin MLF® 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 DC-DC Converter 2.7 to 5.5V supply voltage 2MHz PWM mode Output current to 600mA >95% efficiency 100% maximum duty cycle Fixed output voltage option down to 1V Ultra-fast transient response Stable with 2.2µF ceramic output capacitor Fully integrated MOSFET switches Micropower shutdown (1mA in shutdown) Thermal shutdown and current limit protection Pb-free 10-pin 2mm x 2mm Thin MLF® package –40°C to +125°C junction temperature range LDO VIN range 2.7V to 5.5V 300mA output current Output voltage down to 0.8V Thermal shutdown protection Current limit protection App...