Integrated Power Management IC supports DaVinciT-based portables
Texas Instruments has introduced what it says is the first power management integrated circuit (PMIC) fully optimized to support all power system requirements of a multimedia device based on DaVinciT technology. Simplifying power design in portable media players, digital still cameras and other lithium-battery powered electronics, the flexible device provides dynamic voltage scaling and up to 95 percent power conversion efficiency.
TI's TPS65023 converter manages the power in a TMS320DM644x digital signal processor (DSP) based on DaVinci technology with high-performance digital control and maximum efficiency across the widest possible range of load currents up to 1.5 A. The device, which comes in a small 5 mm x 5 mm QFN package, integrates three step-down converters to support the system's core voltage, peripheral, I/O and memory voltage.
The TPS65023 uses an I2C communications interface to implement a dynamic voltage scaling technique that digitally adjusts the core output voltage level between 0.8 V and 1.6 V, allowing the system to conserve power. The interface is compatible with fast/standard and high-speed mode I2C
specification, which allows data transfer up to 400 kHz. All three of TPS65023's step-down converters allows the device to operate in a power-save mode at light-load currents, and can be placed in a shutdown mode when power consumption is reduced to less than 1 µA.
The TPS65023 also integrates two general-purpose, 200-mA linear dropout (LDO) voltage regulators that are enabled with an external input pin. Each LDO operates with an input voltage range between 2.5 V and 6.5 V, which allows each to be supplied from one of the integrated step-down
converters or directly from the battery.
TI offers the broadest portfolio of innovative power management products that support low-power DaVinci processors and other TI DSPs. TI's step-down DC/DC converters range from the TPS62300 and TPS62350 3-MHz devices for single-cell lithium battery-powered handheld applications to
TI's TPS5430 SWIFTT converter for multi-cell batteries. TI's power management products support any system based on DaVinci technology, including the low-noise TPS79901 low-dropout regulator (LDO), bq27200 battery gas gauge, bq24070 battery charger and TPS3808 supervisory circuit.
The TPS65023 is available in volume production from TI and its authorized distributors. The converter comes in a 40-pin, 5 mm x 5 mm QFN package. Suggested retail pricing is $3.85 in 1,000-piece
quantities.
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