Texas Instruments has introduced a multi-mode power management unit (PMU) that enables ultra-low, total system quiescent current as low as 100 nA, which minimises power consumption in battery-powered, microcontroller-based water and gas meters and other industrial applications.
The TPS65290 manages all power requirements in the system, including load conditions from 100 nA to 500 mA. It incorporates three factory-configurable ‘always-on’ power supplies for microcontroller sleep mode and an automatic function for choosing power from either the input voltage or buck-boost converter.
The TPS65290 integrates a 500 mA buck-boost converter, 150 mA LDO, eight power distribution switches, input voltage recovery comparator, state machine and factory-selectable SPI/I²C interface onto one 20 mm² power management chip. Extensive EEPROM configurations and programmable output voltages give designers flexibility to optimise their systems’ output voltage.
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