A boost dc/dc converter has a built-in MOSFET featuring the lowest current consumption in the industry, making it a candidate for electronic devices powered by dry-cell batteries such as electronic dictionaries, remote controls for home appliances, and gadgets (i.e. toys, accessories).
The BU33UV7NUX outputs the 3.3 V necessary for driving MCUs in applications requiring 1-3-V input from one or two dry-cell batteries. Pursuing lower current consumption to prolong operating time in battery-equipped devices allowed ROHM to achieve an industry-low current consumption of 7 μA (vs functionally equivalent products), extending operating time by as much as 175 days over conventional products, from 540 days to 715 days (ROHM study, 50 μA load current and assuming standby operation in conventional remote controls driven by two alkaline batteries). In addition, a load current mode switching function is built in that allows existing remote controls to support the latest high-performance systems equipped with LCD panels, providing greater energy savings in a wide range of sets.
The BU33UV7NUX is available now and costs $0.49 /unit (1,000 pcs). The BU33UV7NUX-EVK-101 evaluation board is available now and costs $51.25 /board.
The BU33UV7NUX can be driven by input voltages as low as 0.9 V and supports both single dry-cell and button-type lithium-ion battery sets. Plus, the built-in battery leak detection function makes it particularly suited for dry-cell applications.
Load current mode switching improves efficiency in a wide range of applications. A load current mode switching function is included that allows existing remote controls to support the latest high-performance LCD-equipped sets while delivering superior energy savings. Adopting a low-power mode for standard products (50 mA max. load current, 7 μA current consumption, PFM control), and automatically switching to high-power mode for high-performance (500 mA max. load current, 13 μA current consumption, PFM/PWM switching control), make it possible to achieve high efficiency power conversion as high as 94% under a wide range of conditions.
ROHM Semiconductor USA, LLC, 2323 Owen Street Santa Clara, CA 95054, www.rohm.com/web/global/products/-/product/BU33UV7NUX