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Linear Technology Corporation announces the LTC3208, a fully integrated, 850 kHz, low noise, high efficiency 1x/1.5x/2x charge pump multi-display LED driver. It can drive up to 17 LED current sources: a 1-4 LED Main display, 1-2 LED Sub display, a 1-3 LED RGB display, a 1-4 Camera LED display, and a 1-4 LED Auxiliary display, all from a 5 × 5 mm QFN package. Each display has digital control with independent dimming and programming via a two-wire I²C™ serial interface. The LTC3208's input voltage range of 2.9 to 4.5 V is optimized for single cell Li-Ion cellular applications. Efficiencies when driven from a Li-Ion battery (3.6 V nominal) reach 95% with quiescent current of 250µA, maximizing battery run-time. The LTC3208 requires only four small capacitors and one resistor to create a low profile (< 34 mm², 0.75 mm high) footprint capable of powering all LEDs used in five separate displays.

Linear Technology Corporation