Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TPS65020
Edited by the Electronicstalk Editorial
Team on 06 October 2005
Power chip targets OMAP and XScale based
designs
Texas Instruments has announced a power conversion integrated circuit (IC) that supports power supply requirements for OMAP-based mobile handsets and XScale-based multimedia devices.
Texas Instruments has announced a power conversion integrated circuit (IC) that supports power supply requirements for OMAP-based mobile handsets and XScale-based multimedia devices TI's TPS65020 power management unit integrates high-performance analogue building blocks to support multiple voltages in single-cell lithium-ion (Li-ion) powered applications, such as smart phones, PDAs, digital still cameras, and portable audio and media players
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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The device incorporates three synchronous step-down DC/DC convertors with integrated FETs, three linear regulators (LDOs), and an I2C communications interface that allows full programmability and dynamic voltage scaling of the core voltage.
The TPS65020's three integrated convertors are designed to efficiently transfer the core voltage, peripheral, I/O and memory rails of a PXA270, OMAP1610 or OMAP1710 processor-based system.
A 1.2A DC/DC steps down the system voltage with up to 97% efficiency at a 3.3V output.
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A second 1A convertor supports system memory with up to 95% efficiency.
The third 800mA convertor manages the power to the processor core with up to 90% efficiency.
The device's 1.5MHz switching frequency allows designers to reduce board space by applying small external components, such as 2.2uH inductors.
Additional low-dropout regulators in the TPS65020 supply power to PLL, RTC and SRAM subcomponents, and achieve a low quiescent current of only 85uA.
To further conserve battery power, the TPS65020's DC/DC switch-mode convertors enter a low-power mode at light load for maximum efficiency across the widest possible range of load current.
The device also features a serial interface, which is compatible with the standard and fast-mode I2C specifications, allowing data transfers at up to 400kHz.
The interface adds flexibility to the power supply solution and enables instant programmability via dynamic voltage scaling reacting to changing system requirements.
TI continues to provide innovative analogue and digital technologies focused on improving power and performance in three critical areas of the system.
First, advanced battery management technology intelligently charges the battery and accurately measures its capacity.
Secondly, switch-mode power conversion translates the battery power as efficiently as possible to supply system components.
And thirdly, new advancements in TI system power and performance management, such as SmartReflex technology, analyse and manage power consumption in the processor domain, while adaptively controlling the power supply through software to optimise the use of battery power.
The TPS65020 is available in volume production from TI and its authorised distributors.
The power management unit comes in a highly reliable, 40-pin, 5 x 5mm QFN package, and is priced at $3.75 each in quantities of 1000 units.
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