Synchronous LED Driver
Linear Technology announces the LTC3490, a synchronous boost DC/DC converter optimized for driving high current white LEDs. The LTC3490 operates at up to 90% efficiency, maximizing battery run time while its input voltage range of 1 V to 3.2 V enables it to deliver up to 350 mA from either a single or dual cell alkaline/NiMH battery. Its output voltage range of 2.8 V to 4 V is fully compliant with the forward voltage requirements of high current LEDs. The LTC3490 provides constant current drive for LED applications requiring up to 1 watt of power. Its 3 × 3 mm DFN package (or SO-8) and 1.3 MHz switching frequency offer a small solution footprint for handheld applications.
Linear Technology Corporation