ROHM Semiconductor BD83070GWL FET Buck-Boost Converters
ROHM Semiconductor BD83070GWL Synchronous Buck-Boost DC/DC converter provides a 3.3V or 2.5V output from a single-cell lithium-ion battery or other input between 2.0V and 5.5V. The built-in low-RDS(on) MOSFET and low control current circuitry achieve a power-conversion efficiency of 97% during operation (at 200mA load current) and over 90% efficiency at other light loads (from 100µA) to heavy loads (1A). This performance contributes to longer operating time in battery-driven devices, prolonging battery life by as much as 1.53 times compared to other conventional products during standby (100μA load current). The device changes between buck and boosts operations depending on the input voltage. The converter is geared toward smaller electronic devices such as battery-powered portables, tablets, and smartphones.
Features
- Built-in low-RDS(on) MOSFET and low control current circuitry achieve a power-conversion efficiency of 97% during operation (at 200mA load current) and over 90% efficiency at other light loads (from 100µA) to heavy loads (1A)
- Synchronous buck-boost DC/DC converter
- Automatic PFM/PWM transition
- Up to 1 A (VIN > 2.7V, VOUT = 3.3V) output current
- 2.5V or 3.3V selectable output voltage
- Up to 95% efficiency
- 1.61V maximum UVLO detection
- Built-in thermal, over-voltage, and current protection
Applications
- Coin battery-equipped sets (Internet of Things)
- Li-ion battery devices, including smartphones, tablets, and PCs
- Battery-driven equipment such as toys and electric toothbrushes
Specifications
- 2.0V to 5.5V input voltage range
- 2.5V or 3.3V output voltage
- 1A maximum output current
- 1.5MHz typical switching frequency
- 2.8µA typical quiescent VIN current
- -40°C to +85°C operating temperature range
Videos
Power Conversion Efficiency Comparison
Power Supply Specifications
Block Diagram
Associated Products
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BD8306MUV 2.0A MOSFET Buck-Boost Converter produces step-up/down output voltage.
ROHM Semiconductor BD83850GWL Regulator & Charge Pump Inverter
Boost-switching Regulator and Charge Pump Inverter for small TFT-LCD displays.
Development Tools
ROHM Semiconductor BD83070GWL-EVK-001 Converter Evaluation Board
Designed to help evaluate the BD83070GWL, a synchronous buck-boost DC/DC converter.