LTC Intros LTC3206 Charge Pump Voltage Converter
Linear Technology Corp. (LTC, Milpitas, CA) announced its new LTC3206, an 800 kHz, low-noise, high-efficiency, step-up/step-down fractional charge pump voltage converter. The LTC3206 can drive a 1-6 LED main display, 1-4 LED sub-display plus an RGB display, all from a 4 mm x 4 mm QFN package. Each display has digital control with independent dimming and programming via a two-wire I2C serial interface.
The device's input-voltage range of 2.8 V to 4.5 V optimizes it for single-cell, lithium-ion cellular applications. Driven from a single-cell , lithium-ion battery (3.6 V), efficiencies reach 92% with a quiescent current of 180 µA, maximizing battery run time. The LTC3206 requires only four small capacitors and two resistors to create a tiny (<25 mm², 0.75 mm high) solution footprint, capable of powering all LEDs used in three separate displays.
The LTC3206EUF is available from stock in a 24-lead QFN (4 mm x 4 mm) package. Pricing starts at $2.20 each for 1,000-piece quantities.