The LT8494 is a current mode, fixed frequency SEPIC/boost dc/dc converter with an internal 2-A, 70-V switch. The 7-µA quiescent current targets automotive or other industrial battery powered systems. The dc/dc converter starts up from an input voltage range of 2.5 to 32 V and once running it operates from inputs from 1 to 60 V, making it suitable for applications with input sources ranging from a single-cell Li-Ion to automotive inputs.
The dc/dc converter can be configured as a boost, SEPIC or flyback converter. Its switching frequency can be programmed via a single resistor between 250 kHz and 1.5 MHz, enabling designers to minimize external component sizes. A unique design using dual supply pins (VIN and BIAS) enables the device to operate from the most efficient supply. The device is available in a thermally enhanced TSSOP-20E or 4 x 4-mm QFN package.
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