Product Releases

Micropower Boost Converter

Tue, 04/10/2001 - 10:14am
A micropower boost converter capable of driving white LEDs and providing LCD bias is now available from Micrel Semiconductor for use in cellular phone and PDA applications. The MIC2142 was designed and developed by Micrel.

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.


Share this Story

You may login with either your assigned username or your e-mail address.
The password field is case sensitive.