TI Debuts Power Management IC for DaVinci-Based Portable Electronics
Texas Instruments Incorporated (TI) (NYSE: TXN) introduced today the first power management integrated circuit (PMIC) fully optimized to support all power system requirements of a multimedia device based on DaVinci(TM) 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.
Integrated Features of the TPS65023:
- 1.5-A, 90 percent efficient step-down converter for processor core
- 1.2-A, 95 percent efficient step-down converter for system voltage
- 1.0-A, 92 percent efficient step-down converter for memory voltage
- 30-mA LDO/switch for real time clock
- Two 200-mA general-purpose LDOs
- Dynamic voltage management for DaVinci processor core
- 85-µA typical quiescent current
- I2C compatible interface with data transfer up to 400 kHz
- Low ripple pulse frequency modulation (PFM) mode
- Thermal shutdown protection
Power Management Solutions for DaVinci Processors
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 SWIFT(TM) 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.
Available Today
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. Evaluation modules of the TPS65023, application notes and TI's comprehensive portfolio of power management ICs are available.
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