BD9851EFV datasheet pdf

ROHM CO., L TD . Description Features Applications Product lineup Single-output High-frequency Step-down Switching Regulator (Controller type) Dual-output Step-up, Negative, Step-down Switching Regulator (Controller type) TECHNICAL NOTE BD9851EFV BD9850FVM Large Current External FET Controller Type Switching Regulators Sep. 2008 Now available ESD Resistance High temperature operating Now available The BD9850FVM is a 1-channel DC/ DC step-down switching regulator controller, while the BD9851EFV is a 2-channel DC/ DC step-down switching regulator controller. The BD9850FVM is adaptable for a maximum switching frequency of 2 MHz and the BD9851EFV for that of 3 MHz. Both provide space saving in all applications. TFT panel, TA / Router, digital consumer electronics, PC, and portable CD/ DVD/ DVC 1) Adaptable for 2-MHz switching frequency (externally variable) (BD9850FVM) Adaptable for 3-MHz switching frequency (externally variable) (BD9851EFV) 2) FET direct drive 3) High-accuracy reference voltage (Accuracy: ±1%) 4) Built-in Under Voltage Lock Out circuit (UVLO) 5) Built-in Thermal Shutdown circuit (TSD) 6) The BD9851EFV provides two channels: Channel 1 available for selection of step-down/step-up switching Channel 2 available for selection of step-down/inverting switching. 7) Compact MSOP8 package (BD9850FVM) / HTSSOP-B20 package (BD9851EFV) Input range Oscillation frequency range External synchronization Standby function Operating temperature Package BD9850FVM 4V to 9V 100kHz to 2MHz Not provided Not provided – 40 ̊C to 85 ̊C MSOP8 BD9851EFV 4V to 18V 10kHz to 3MHz Not provided Provided – 40 ̊C to 85 ̊C HTSSOP-B20