The MIC2203BMM is a high efficiency 1MHz PWM synchronous buck switching regulator. The MIC2203BMM features low noise constant frequency PWM operation with a low dynamic supply current of <1mA. The low noise and efficient operation both make the MIC2203BMM well suited for sensitive RF, and audio power applications.
The MIC2203BMM operates from 2.3V to 5.5V input and can supply over 300mA of output current with output voltages down to 0.5V. Additionally, the MIC2203BMM can be synchronized to an external clock, or multiple MIC2203s can easily be daisy-chained with the SYNCLOCK feature.
The MIC2203BMM has a high loop bandwidth with corresponding ultra fast transient response times. This reduces the output capacitor size, and 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 MIC2203BMM is available in 10-pin MSOP package with an operating junction temperature range from -40°C to 125°C.
Feature
- Input voltage range: 2.3V to 5.5V
- Output voltage adjustable down to 0.5V
- 300mA output current
- Constant 1MHz PWM switching frequency
- > 95% efficiency
- < 1mA switching supply current
- < 350µA static quiescent current
- < 1µA shutdown current
- All-ceramic capacitors
- Easily synchronized to external clock
- SYNCLOCK feature to daisy chain multiple devices
- Thermal shutdown and current limit protection
- 10-pin MSOP package
- -40°C to +125°C junction temperature range
