The TPS6107x devices provide a power supply 1• 90% Efficient Synchronous Boost Converter
solution for products powered by either a one-cell,
– 75-mA Output Current at 3.3 V From 0.9-V two-cell, or three-cell alkaline, NiCd or NiMH, or oneInput cell Li-ion or Li-polymer battery. Output currents can
– 150-mA Output Current at 3.3 V From 1.8-V go as high as 75 mA while using a single-cell
Input alkaline, and discharge it down to 0.9 V. It can also
be used for generating 5 V at 200 mA from a 3.3-V • Device Quiescent Current: 19 µA (Typ) rail or a Li-ion battery. The boost converter is based
• Input Voltage Range: 0.9 V to 5.5 V on a fixed frequency, pulse-width-modulation (PWM)
• Adjustable Output Voltage Up to 5.5 V controller using a synchronous rectifier to obtain
• Power-Save Mode Version Available for maximum efficiency. At low load currents the
TPS61070 and TPS61073 enter the power-save Improved Efficiency at Low Output Power
mode to maintain a high efficiency over a wide load
• Load Disconnect During Shutdown current range. The power-save mode is disabled in
• Overtemperature Protection the TPS61071 and TPS61072, forcing the converters
• Small 6-Pin Thin SOT23 Package to operate at a fixed switching frequency. The
maximum peak current in the boost switch is typically
limited to a value of 600 mA. 2 Applications
The TPS6107x output voltage is programmed by an • All One-Cell, Two-Cell, and Three-Cell Alkaline,
external resistor divider. The converter can be NiCd or NiMH or Single-Cell Li disabled to minimize battery drain. During shutdown, Battery-Powered Products the load is completely disconnected from the battery.
• Portable Audio Players The device is pa
