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).