The TPS6306x devices provide a
power supply solution for products powered by either three-cell up to six-cell
alkaline, NiCd or NiMH battery, or a one-cell or dual-cell Li-Ion or Li-polymer
battery. Output currents can go as high as 2 A while using a dual-cell Li-Ion or
Li-polymer battery, and discharge to 5 V or lower. The buck-boost converter is based
on a fixed frequency, pulse width modulation (PWM) controller using synchronous
rectification to obtain maximum efficiency. At low load currents, the converter
enters power save mode to maintain high efficiency over a wide load current range.
The power save mode can be disabled, forcing the converter to operate at a fixed
switching frequency. The maximum average current in the switches is limited to a
typical value of 2.25 A. The output voltage is programmable using an external
resistor divider, or is fixed internally on the chip. The converter can be disabled
to minimize battery drain. During shutdown, the load disconnects from the
battery.The devices are available in a 3 mm × 3 mm,
10-pin, WSON (DSC) package.
