5.5V, 11A, synchronous boost converter with bypass mode and I2C interface

The TPS61290x provides a

power supply design for products powered by a nickel-rich, silicon anode, Li-ion, or

LiFePO4 battery. The voltage range is optimized for single-cell portable

applications like in smart-phones or POS terminal.

Used as a high-power pre-regulator, the device

extends the battery run-time and overcomes input current and voltage limitations of

the powered system. With a wide input voltage range of 1.8V to 5.5V. Program the

output voltage by I2C up to 5.5V. The default output voltage of TPS61290

is 3.4V. The default output voltage of TPS612901 is 5V (VSEL = Low) and 5.25V (VSEL

= High).

During operation, when the battery is in a good

state of charge, the TPS61290x works in bypass mode,

connecting the battery to the power supply system through the bypass FET. If the

battery gets to a lower state of charge and the voltage becomes lower than the

desired minimum system voltage, the device seamlessly transits into boost mode to

use the full battery capacity.

The TPS61290x offers a very

small design size with a 16-ball YBG package.