MIC23031 regulator equivalent, 4mhz pwm 400ma buck regulator.
* Input voltage: 2.7V to 5.5V
* 400mA output current
* Up to 93% efficiency and 88% at 1mA
* 21µA typical quiescent current
* 4MHz PWM operation in co.
* Mobile handsets
* Portable media/MP3 players
* Portable navigation devices (GPS)
* WiFi/WiMax/WiBro mo.
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