Class-leading current consumption prolongs battery life in remote control applications
ROHM has recently announced the development of a boost DC/DC converter with built-in MOSFET featuring the lowest current consumption in the industry, making it ideal for electronic devices powered by dry-cell batteries such as electronic dictionaries, remote controls for home appliances, and gadgets (i.e. toys, accessories).
In recent years, the number of portable devices such as smartphones and wearables that utilize rechargeable batteries (i.e. lithium ion) has risen dramatically. Meanwhile, the adoption of conventional dry-cell batteries resulting from application diversification and expansion into overseas markets for electronic dictionaries, remote controls for home appliances, and electronic gadgets is progressing at a rapid pace, increasing the demand for power supply ICs that can provide greater energy savings.
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| Typical Application Circuit. |
n response, ROHM leveraged power processes and analog circuit technologies cultivated over many years to develop power supply ICs that meet market needs, including this latest converter optimized for devices powered by dry-cell batteries. The BU33UV7NUX outputs the 3.3 V necessary for driving MCUs in applications requiring 1-3 V input from 1 to 2 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 2 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.
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| Typical Performance characteristics. |
BU33UV7NUX
- Availability: Now
- Pricing: $0.49 /unit (1,000 pcs)
BU33UV7NUX-EVK-101
- Availability: Now
- Pricing: $51.25 /board
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| The BU33UV7NUX-EVK-101 evaluation board. |
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.
Target Applications
- Electronic dictionaries
- Remote controls
- Electronic gadgets (i.e. toys, accessories)
- Wearables
- Electric toothbrushes
…and other sets driven by 1-2 dry-cell (1 to 3 V) or button-type li-ion batteries
Specifications
| Part No. | Input Voltage Range |
Output Voltage |
Current Consumption |
Max. Load Current | Operating Frequency |
Operating Temp. Range |
| BU33UV7NUX | 0.6 V to 4.5 V | 3.3 V | 7 µA (MODE=L) 13 µA (MODE=H) |
50 mA (MODE=L) 500 mA (MODE=H) |
800 kHz | -40 °C to 85 °C |
