Boost converter features pin-selectable output voltages and bypass mode

A versatile boost converter with pin selectable output voltages and an integrated bypass mode, the TPS61291 is now available from Texas Instruments (TI). In bypass operation, the device provides a direct path from the input to the system and allows a low power microcontroller, such as the MSP430, to operate directly from a single 3V Li-MnO2 battery or dual alkaline battery cells. In bypass mode the integrated feedback divider network for boost mode operation is disconnected from the output and the quiescent current consumption drops down to only 15nA (typical).