MIC2202YML [Microchip]

The MIC2202 is a high efficiency, 2MHz PWM synchronous buck regulator. The fast 2MHz operation along with a proprietary compensation scheme allows the smallest possible external components. The MIC2202 can operate with a 1µF ceramic output capacitor and a small, low DC-resistance, 2.2µH inductor, reducing system size and cost while allowing a high level of efficiency.

The MIC2202 operates from 2.3V to 5.5V input and features internal power MOSFETs that can supply over 600mA of output current with output voltages down to 0.5V. The MIC2202 implements a constant 2MHz pulse- width-modulation (PWM) control scheme which reduces noise in sensitive RF, audio, and communications applications. Additionally, the MIC2202 can be synchronized to an external clock, or multiple MIC2202s can easily be daisy-chained with the SYNCLOCK feature.

The MIC2202 has a high bandwidth loop (up to 500kHz) 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 MIC2202 is available in 10-pin MSOP package options with an operating junction temperature range from -40°C to +125°C

• Input voltage range: 2.3V to 5.5V
• Output down to 0.5V @ 600mA
• 2MHz PWM operation
• Stable with 1µF ceramic output capcitor.
• Ultra-fast transient response (up to 500kHz GBW)
• Internal compensation
• All ceramic capacitors
• >95% efficiency
• Fully integrated MOSFET switches
• Easily synchronized to external clock
• SYNCLOCK feature to daisy chain multiple 2202s
• Requires only 4 external components
• 1% line and load regulation
• Logic-controlled micropower shutdown
• Thermal shutdown and current limit protection
• 10-pin MSOP package
• -40°C to +125°C junction temperature range