BD83850GWL Regulator & Charge Pump Inverter ROHM Semiconductor BD83850GWL Regulator and Charge Pump Inverter is a Boost-switching Regulator and Charge Pump Inverter for small TFT-LCD displays. The device has a wide input voltage range of 2.5V to 4.5V, which is suitable for portable applications. Its small package design is also ideal for miniaturizing the power supply.