Multi-mode power management unit extends battery life in MCU-based systems
The TPS65290 PMU manages all power requirements in the system, including load conditions from 100 nA to 500 mA.
The TPS65290 PMU incorporates three factory configurable “always-on” power supplies for microcontroller (MCU) sleep mode and an automatic function for choosing power from either the input voltage or buck-boost converter. In addition, the TPS65290 operates seamlessly with TI’s ultra-low power MSP430 MCUs, such as the MSP430F5328.
The TPS65290 enables designers to develop systems to last beyond 10 years on a single battery by taking advantage of the new PMU’s low-power, always-on bias supply for MCU sleep mode with the following three factory-selectable options:
- 10-mA, 100-nA quiescent current (IDDQ) sleep mode, zero leakage current bias controller with preset voltage.
- 10-mA, 400-nA IDDQ low-dropout regulator (LDO).
- 30-mA, 300-nA IDDQ buck converter.
The TPS65290 minimizes board footprint, number of components and cost: 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 allow designers flexibility to optimize their systems’ output voltage.
The TPS65290 is available today in a 24-pin, 4-mm x 5-mm, VQFN package for a suggested retail price of $1.75 in 1,000-unit quantities. Designers can order the TPS65290BMEVM and TPS65290LMEVM evaluation modules to quickly evaluate their designs and speed time to market.
More information about the TPS65290 PMU at
www.ti.com
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