1 Features

• Input voltage range: 2.5 V to 12 V

• Efficiency: Up to 93%

• Output current at 5 V (VIN < 10 V):

2 A in buck mode

• Output current at 5 V (VIN > 4 V):

1.3 A in boost mode

• Automatic transition between step down and boost

mode

• Typical device quiescent current: < 30 μA

• Fixed and adjustable output voltage options from

2.5 V to 8 V

• Power save mode for improved efficiency at low

output power

• Forced fixed-frequency operation at 2.4 MHz and

synchronization possible

• Power good output

• Buck-Boost Overlap Control™

• Load disconnect during shutdown

• Overtemperature protection

• Overvoltage protection

2 Applications

• Dual Li-ion application

• Digital still cameras (DSC) and camcorders

• Notebook computer

• Industrial metering equipment

• Ultra mobile PCs and mobile internet devices

• Personal medical products

• High-power LEDs

3 Description

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.