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Texas Instruments Introduces Inductor-less Step-Down Charge Pumps for High Efficiency, Ease of Use in Battery-Operated SystemsDevices Offer Industry Leading Output Current Drive of 250mA   DALLAS, Nov 19, 2001 /PRNewswire via COMTEX/ -- A new family of step-down charge pumps from Texas Instruments (NYSE: TXN) (TI) brings power efficiency and ease of use to battery-operated systems and PC peripherals. With its high output drive and built-in protection features, the new charge pumps offer savings in board space and system cost. Being the first step-down, or "buck", charge pumps introduced by TI, the new family of devices extends TI's comprehensive portfolio of power-supply solutions for low-voltage applications including personal digital assistants and Internet audio players. (See power.ti.com/aap7037u ).   The new TPS6050x step-down charge pumps offer regulated output voltages ranging from 0.8 to 3.3 volts (V) in order to power low-voltage components in portable and bus-powered systems. The charge pumps take an input voltage range from 1.8V to 6.5V, enabling use with a variety of battery types. Additionally, a low quiescent current of only 40 microamps (uA) allows for longer standby times. At 250 mA, the family provides the highest output current in the industry and is capable of supporting multiple components within a system. Finally, with the TPS6050x, only four small ceramic capacitors are required to build a complete high-efficiency charge pump power converter, thereby saving board space and cost.   "With the introduction of step-down charge pumps, TI expands its existing line of linear regulators and inductive step-down converters offering a more complete selection of voltage regulator solutions," said Guenter Sporer, systems engineering manager for Low Power DC-DC Converter Products at TI. "With low-voltage applications becoming more specialized, customers know that they can rely on TI for power supply solutions that meet their system requirements."   Efficiency and Ease of Use   The TPS6050x step-down charge pumps offer operating efficiencies comparable to inductive buck converters, yet with the ease of use that is customary with linear regulators. Peak efficiencies of 90 percent are achieved by utilizing a fractional conversion topology resulting in lower power dissipation and eliminating the need for heat sinking. Supporting system flexibility, the devices can be powered by three or four nickel-cadmium (NiCad), nickel-metal-hydride (NiMH) or alkaline batteries, or by a single lithium-ion (Li-ion) cell.   Requiring few external capacitors and no inductors, TPS6050x charge pumps simplify design and allow for a complete converter to be built in only 0.155 square inches (in2). To prevent current leakage and prolong battery life, the load is isolated from the battery during shutdown. Added protection features include a soft start to limit in-rush current, a Power Good output voltage supervisor, over-temperature and over-current protection.   Available Today   The TPS6050x step-down charge pumps are now available in a 10-pin MSOP package from TI and TI authorized distributors. Suggested resale pricing is $1.35 each in quantities of 1,000. An evaluation module (EVM) is available today to help simplify system design and speed time to market. Regulated output voltages for the TPS6050x devices are as follows:   TPS60500   Adjustable 0.8V to 3.3 V      TPS60501   Fixed 3.3 V      TPS60502   Fixed 1.8 V      TPS60503   Fixed 1.5 V  Texas Instruments Incorporated is the world leader in digital signal processing and analog technologies, the semiconductor engines of the Internet age. The company's businesses also include sensors and controls, and educational and productivity solutions. TI is headquartered in Dallas, Texas, and has manufacturing or sales operations in more than 25 countries.   Texas Instruments is traded on the New York Stock Exchange under the symbol TXN. More information is located on the World Wide Web at: http://www.ti.com   Please refer all reader inquiries to:  Texas Instruments Incorporated                                             Semiconductor Group, SC-01189                                             Literature Response Center                                             P.O. Box 954                                             Santa Clarita, CA  91380                                             1-800-477-8924, ext. 4500                     MAKE YOUR OPINION COUNT -  Click Here                http://tbutton.prnewswire.com/prn/11690X72769658  SOURCE Texas Instruments Incorporated Semiconductor Group   CONTACT:          Texas Instruments Incorporated Semiconductor Group,                   +1-800-477-8924, ext. 4500 URL:              http://power.ti.com/aap7037u http://www.prnewswire.com  Copyright (C) 2001 PR Newswire.  All rights reserved.  -0-   KEYWORD:          Texas INDUSTRY KEYWORD: CPR SUBJECT CODE:     PDT    [IMAGE]    ***IMPORTANT NOTICE AND DISCLAIMER REGARDING THIS COURTESY EMAIL***   At your request, as a subscriber to our service, this email alert is being sent to you as a courtesy and is for information purposes only. We are a financial news re-distributor. 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