Texas Instruments TPS61131PWR

TPS61131PWR Description
The TPS61131PWR provides a complete power supply solution for products powered by either a one-cell Li-lon or Li-Polymer, or two- to four-cell Alkaline, NiCd, or NiMH batteries. The TPS61131PWR can generate two regulated output voltages. It provides a simple and efficient buck-boost solution for generating 3.3 V out of an input voltage that can be both higher and lower than the output voltage. The converter provides a maximum output current of at least 300 mA with supply voltages down to 1.8 V. The implemented SEPIC converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. The maximum peak current in the SEPIC switch is limited to a value of 1600 mA.

TPS61131PWR Features
Synchronous, Up to 90% Efficient, SEPIC Converter With 300-mA Output Current From 2.5-V Input Integrated 200-mA Reverse Voltage Protected LDO for DC-DC Output Voltage Post Regulation or Second Output Voltage 40-μA (Typical) Quiescent Current Input Voltage Range: 1.8V to 5.5 V Fixed and Adjustable Output Voltage Options up to 5.5 V Power Save Mode for Improved Efficiency at Low-Output Power Low Battery Comparator Power Good Output Low EMI-Converter (Integrated Antiringing Switch) Load Disconnect During Shutdown Overtemperature Protection Available in a Small 4-mm x 4-mm VQFN-16 or in a TSSOP-16 Package

TPS61131PWR Applications
All Single Cell Li, Dual or Triple Cell Battery or USB Powered Products such as MP-3 Players, PDAs, and Other Portable Equipment Dual Input or Dual Output Mode High Efficient Li-lon to 3.3-V Conversion