TPS61291

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS61291 SLVSBX9A – SEPTEMBER 2014 – REVISED SEPTEMBER 2014 TPS61291 Low Iq Boost Converter with Bypass Operation 1 Features 1 Input Voltage Range 0.9V to 5V Startup Voltage 1.5V at 20mA Load Pin Selectable Output Voltages: 3.3V, 3V, 2.5V 15nA typical Quiescent Current in Bypass Mode 5.7μA typical Quiescent Current in Boost Mode Bypass Switch from VIN to VOUT IOUT > 200mA at 3.3V VOUT, VIN = 1.8V Internal Feedback Divider Disconnect (Bypass Mode) Controlled Bypass Transition Prevents Reverse Current into Battery Power-Save Mode at Light Loads Overtemperature Protection Redundant Overvoltage Protection Small 2mm x 2mm SON 6-pin package 2 Applications Metering (Gas, Water, Smart Meters) Remote Controls Home Security / Home Automation Single 3V Li-MnO2 or 2 x 1.5V Alkaline Cell Powered Applications 3 Description The TPS61291 is a boost converter with pin selectable output voltages and an integrated bypass mode. In bypass operation, the device provides a direct path from the input to the system and allows a low power micro controller (MCU) such as the MSP430 to operate directly from a single 3V Li-MnO2 battery or dual alkaline battery cells. In bypass mode the integrated feedback divider network for boost mode operation is disconnected from the output and the quiescent current consumption drops down to only 15nA (typical). In boost mode the device provides ...