Product Key Points
High Efficiencies at All Load Levels
Maximized Operating Times of Battery-Driven Equipment
The BD83070GWL is a buck-boost (step-up/step-down) DC/DC converter IC with an internal MOSFET, developed for use with battery-driven mobile devices, wearable equipment, and IoT equipment. Through buck-boost operation the battery energy is utilized to maximum effect, while realizing the industry's highest efficiencies* and among the lowest current consumption levels in the industry over a broad range of load conditions, from light to heavy loading. As a result, operating times for battery-drive equipment can be greatly extended. *ROHM survey, July 2019
The lineup of high-efficiency, ultra-low power consumption DC/DC converter ICs developed specifically for use in battery-powered applications already includes the BU33UV7NUX for step-up use and the BD70522GUL for step-down applications, among others. The buck-boost BD83070GWL is a new product that supplements the lineup of high-efficiency, ultra-low power consumption DC/DC converter ICs.
Securing Sufficient Equipment Operating Time While Allowing For Compact Batteries
In recent years, electronic devices that run on batteries have come to be used in a wide variety of areas--from mobile devices to wearable equipment, to IoT products. Devices mounted on these items are required to be compact so as to improve design and secure space for new functions, and must also reduce power consumption insofar as possible in order to improve the length of battery use.
In order to extend battery operating time, it is essential that the equipment power consumption be reduced and the battery energy be used to the absolute maximum. The various devices that constitute an equipment system use different methods to attempt to reduce power consumption, but it is extremely important that power consumption be reduced in a power supply that directly converts energy from a battery to feed power to another device.
BD83070GWL Buck-boost DC/DC Converter Achieves High Efficiency Over a Broad Range of Load Conditions
- ・Through incorporation of a low-loss MOSFET based on a 0.13 μm BiCDMOS process for power devices, the following are achieved:
--Achievement of an industry-high power conversion efficiency of 97% at an operating load current of 200 mA, which is common in electric toothbrushes, electric shavers and the like
--High efficiencies of at least 90% over a broad range from light loads of 100 μA to the maximum load of 1 A
--Battery operating time extended by 1.53 while in application standby (assuming load current of 100 μA) (ROHM survey)
- ・A low-power consumption current and automatic PFM/PWM control technology are combined to accomplish:
--Current consumption of 2.8 μA typ (VIN=3.6 V, Auto-PFM/PWM, no load), among the best in the industry for a buck-boost power supply IC
- ・Use of ROHM's unique "X Ramp PWM Control" technology to achieve seamless buck-boost transitions
- ・Onboard heat, overvoltage, overcurrent, and UVLO protection
＜Lineup of Power Supply ICs Featuring Power-Saving Performance for Mobile Devices＞
|0.18µA||2.5～5.5V||1.2, 1.5, 1.8, 2.0, 2.5, 2.8, 3.0, 3.2, 3.3V||500mA||1MHz||90%