Power Electronics

Power Management IC Suits Portable Electronics

The first power management integrated circuit (PMIC) from Texas Instruments (TI) is fully optimized to support all power system requirements of a multimedia device based on DaVinci technology. The device provides dynamic voltage scaling and up to 95% power conversion efficiency.

The 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 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 specifications, which enabling 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. The device also features a 30-mA LDO/switch for the real time clock, 85-µA typical quiescent current, and thermal shutdown protection.

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 1000-piece quantities. Evaluation modules of the TPS65023, application notes and TI's comprehensive portfolio of power management ICs are available through power.ti.com.

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