Microchip | MIC2204YMM-TR

The Micrel MIC2204YMM TR is a high efficiency 2 MHz PWM synchronous buck switching regulator. Power conversion efficiency of above 95% is easily obtainable over a wide range of applications. A proprietary internal compensation technique ensures stability with the smallest possible inductor and ceramic output capacitor.

The MIC2204YMM TR operates from 2.3 V to 5.5 V input and features internal power MOSFETs that can supply over 600 mA of output current with output voltages down to 1V. The MIC2204 implements a constant 2 MHz pulse-width-modulation (PWM) control scheme which reduces spurious noise in sensitive RF and communication applications. Additionaly, the MIC2204 can be synchronized to an external clock, or multiple MIC2204s can easily be daisy-chained with the SYNCLOCK feature.

The MIC2204YMM TR has a high bandwidth loop (typ. 200 kHz) which allows ultra fast transient response times. This is very useful when powering applications that require fast dynamic response such as CPU cores and RF circuitry in high performance cellular phones and PDAs. The MIC2204 is available in 10-pin MSOP and 3 mm x 3 mm MLF™-10L package options with an operating junction temperature range from –40°C to 125°C .

Key Features :

• Input voltage range: 2.3 V to 5.5 V
• Output down to 1 V/ 600 mA
• 2 MHz PWM operation
• Ultra-fast transient response (typical 200 kHz GBW)
• Internal compensation
• All ceramic capacitors
• >95% efficiency
• Fully integrated MOSFET switches
• Easily synchronized to external clock
• SYNCLOCK feature to daisy chain multiple 2204s
• <340£gA quiescent current
• Logic controlled micropower shutdown
• Thermal shutdown and current limit protection
• 10-pin MSOP and 3 mm x 3 mm MLF™-10L
• –40°C to +125°C junction temperature range

Applications :

• High efficiency portable power
• Cellular phones
• PDAs
• 802.11 WLAN power supplies
• RF power supplies
• Li Ion battery powered applications