Synchronous buck-boost DC/DC converter drives two banks of white LEDs
Linear Technology has announced the LTC3452, a synchronous buck-boost DC/DC converter optimized for driving two banks of white LEDs from a single Li-Ion battery. Up to five parallel LEDs can be driven at up to 25mA each for backlighting LCD panels, while two LEDS can be driven at up to 200mA each (or one LED at 400mA) for camera flash applications. The LTC3452's synchronous buck-boost topology delivers up to 90% efficiency over the entire usable Li-Ion range of 2.7V to 4.2V, maximizing battery run-time. The combination of a 4mm x 4mm QFN package and a constant 1MHz switching frequency ensures a very compact solution footprint required in most handhelds.The
The LTC3452EUF is available from stock in a 4mm x 4mm DFN package. Pricing starts at $1.80 each for 1,000-piece quantities.