1 Features

1• Up to 96% Efficiency

• 1200-mA Output Current at 3.3 V in Step-Down

Mode (VIN = 3.6 V to 5.5 V)

• Up to 800-mA Output Current at 3.3 V in Boost

Mode (VIN > 2.4 V)

• Automatic Transition Between Step-Down and

Boost Mode

• Device Quiescent Current less than 50 μA

• Input Voltage Range: 2 V to 5.5 V

• Fixed and Adjustable Output Voltage Options from

1.2 V to 5.5 V

• Power Save Mode for Improved Efficiency at Low-

Output Power

• Forced Fixed Frequency Operation and

Synchronization Possible

• Load Disconnect During Shutdown

• Output Overvoltage Protection

• Overtemperature Protection

• Available in Small 20-Pin, 2.126 mm × 1.922 mm,

DSBGA Package

2 Applications

• All Two-Cell and Three-Cell Alkaline, NiCd or

NiMH, or Single-Cell Li

Battery-Powered Products

• Portable Audio Players

• PDAs

• Cellular Phones

• Personal Medical Products

• White LEDs

3 Description

The TPS6301x devices provide a power supply

solution for products powered by either a two-cell or

three-cell alkaline, NiCd or NiMH battery, or a onecell

Li-Ion or Li-polymer battery. Output currents can

go as high as 1200 mA while using a single-cell Li-

Ion or Li-Polymer Battery, and discharge it down to

2.5 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 2200 mA. 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 is disconnected from the battery. The device

is packaged in a 20-pin DSBGA package measuring

2.126 mm × 1.922 mm (YFF).