Description

The SC1408 is a low voltage boost controller that operates from a 1.8V to 16.5V input range. The SC1408 was designed for two cell Alkaline or single cell Lithium Ion battery applications. With the proper external components it can be used as a boost converter or a buck/boost converter. A Shutdown pin allows the user to turn the controller off, reducing supply current to less than 2µA typical. Output voltage can be preset to 5V or is adjustable from 3V to 16.5V with a resistor divider. The controller changes frequency in light load conditions to improve efficiency.

Features

♦ 1.8V to 16.5V input range

♦ Preset (5V) or adjustable output

♦ Ground referenced current limit

♦ On chip precision reference

♦ Up to 300kHz switching frequency

♦ 10µA max shutdown current

♦ Industrial temperature range

♦ SO-8 and MSOP-8 packages. Lead free packages available are fully WEEE and RoHS compliant

Applications

♦ PDA Power supplies

♦ Battery powered applications

♦ Positive LCD Bias generator

♦ Portable communications (cellular phones)

♦ Peripheral card supplies

♦ Industrial power supplies