High Efficiency and High Power Synchronous Boost DC/DC Converter IC

The ROHM has come up with a compact, high-efficiency, high power synchronous boost DC/DC converter IC optimized for single-cell battery applications.

Single cell Li-ion batteries are used to drive many portable devices like smart phones and tablets because it delivers an output of approximately 4.2V at full charge. But, when connecting the portable devices to the interfaces such as USB, HDMI, and audio amplifiers for speakers, etc., the 5V output is required. So, to boost the output voltage and to meet the demands of longer battery life along with the greater efficiency that too in a smaller form factor, the ROHM introduced this DC/DC converter IC (BD1865GWL).

The BD1865GWL provides a lower operating limit of 2.5V, 90% efficiency across all load regions, delivers the output currents up to 2A in a compact 1.6mm x 1.6mm package. It also enables prolonging battery life of the device by extending operation down from the conventional 2.7V. In addition to this, it has two operating modes, one is PWM/PFM mode and another one is ROHM’s original mixing PWM mode.

Key features of BD1865GWL

Low voltage drive prolongs battery life:

To extend the battery life, ROHM utilized the industry-leading analog design technology and delivered a stable 5V output even at 2.5V input voltages.

Two control modes improve efficiency and performance:

PFM/PWM mode:- This mode automatically switches between PFM and PWM modes based on the load, ensuring high efficiency throughout the entire load range.

Mixing PWM mode:- This mode provides higher efficiency at lighter loads than typical PWM and also prevents unwanted audible noises.