Voltage boost converter with power diode and isolation switch

Texas Instruments’ TLV61046A is a highly integrated boost converter designed for applications such as PMOLED panel, LCD bias supply and sensor module. The device integrates a 30V power switch, an input to output isolation switch, and a rectifier diode. It can output up to 28V from input of a Li+ battery or two alkaline batteries in series. The device operates with a switching frequency at 1MHz. This allows the use of small external components. It has an internal default 12V output voltage setting by connecting the FB pin to the VIN pin. Thus it only needs three external components to get 12V output voltage. The device has typical 980mA switch current limit. It has 7ms built-in soft start time to reduce the inrush current. When it is in shutdown mode, the isolation switch disconnects the output from input to minimize the leakage current. The device also implements output short circuit protection, output over-voltage protection and thermal shutdown.