Micropower Boost Converter
Housed in an IttyBitty SOT23-5 packaging, and requiring three external components, the MIC2142 is ideal for portable, space-sensitive applications like cellular phones and PDAs. The MIC2142's 2.2 V to 16 V input voltage range allows it to be powered from single-cell Li Ion or 3-cell Alkaline/NiMH/NiCad batteries.
The MIC2142 is efficient over a wide range of load currents and applications. The device features a low quiescent current of 85 uA, allowing high efficiencies in low-power LCD bias applications. With its low on-resistance integrated 200 mA switch, the MIC2142 can drive up to 4 white LEDs.
The output voltage of the MIC2142 can be adjusted up to 22 V. Fixed output voltage options of 5 V, 12 V and 15 V will soon be available. In addition to boost topology, the MIC2142 can also be configured for use in SEPIC and flyback applications.
Other features of the MIC2142 include a 330 kHz switching frequency, <1 uA shutdown current, 85 uA quiescent current, and an Operating junction temperature from 40 ° C to 85 ° C ambient.