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New dual step-up DC/DC converter from Linear Tech

Posted: 25 Oct 2005     Print Version  Bookmark and Share

Keywords:linear technology  lt3466-1  dc/dc converter  led driver 

Linear Technology Corp. released the LT3466-1 dual step-up DC/DC converter, which is a white LED driver and boost converter in a low profile 3-by-3mm DFN package. The LED driver channel can drive up to 10 white LEDs from a single cell Li-ion input at up to 83 percent efficiency, while the boost converter can generate TFT-LCD bias voltages or drive an OLED display. Each channel has independent dimming and shutdown control. Schottky diodes are integrated, eliminating both the added cost and board space required by external diodes. Linear Tech added that its 3-by-3mm DFN package and tiny externals provide a very compact footprint for space-constrained handheld applications.

The LT3466-1 switching frequency can be set between 200kHz and 2MHz via a single resistor, enabling the designer to minimize solution footprint and maximize efficiency. Constant switching frequency minimizes noise, reducing potential interference with onboard RF or noise sensitive circuitry. Its 2.7V to 24V input voltage range enables it to operate in applications from Li-ion powered handheld devices to automotive backlighting. Both the LED driver and the boost converter have overvoltage protection and internal soft-start.

The LT3466-1 is available from stock in a 3-by-3mm DFN-10 package. Pricing starts at $1.95 each for 1,000-piece quantities.

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