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REG711-33 Datasheet(PDF) 1 Page - Texas Instruments |
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REG711-33 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 13 page  50mA SWITCHED-CAP DC/DC CONVERTER REG711 FEATURES q WIDE INPUT RANGE: 1.8V TO 5.5V 5V VERSION: 2.7V TO 5.5V q AUTOMATIC STEP-UP/STEP-DOWN OPERATION q LOW INPUT CURRENT RIPPLE q LOW OUTPUT VOLTAGE RIPPLE q MINIMUM NUMBER OF EXTERNAL COMPONENTS—NO INDUCTORS q 1MHz INTERNAL OSCILLATOR ALLOWS SMALL CAPACITORS q “SHUTDOWN” MODE q THERMAL AND CURRENT LIMIT PROTECTION q FIVE OUTPUT VOLTAGES AVAILABLE: 5.0V, 3.3V, 3.0V, 2.7V, 2.5V q THIN, SMALL PACKAGE: MSOP-8 APPLICATIONS q SMART CARD READERS q CELLULAR PHONES q SIM CARD SUPPLIES q PORTABLE COMMUNICATION DEVICES q PERSONAL DIGITAL ASSISTANTS q MODEMS q NOTEBOOK AND PALM-TOP COMPUTERS q ELECTRONIC GAMES q HANDHELD METERS q PCMCIA CARDS q CARD BUSES q LCD DISPLAYS DESCRIPTION The REG711 is a switched capacitor voltage con- verter, which produces a regulated, low ripple output voltage from an unregulated input voltage. A wide input supply voltage of 1.8V to 5.5V makes the REG711 ideal for a variety of battery sources, such as single cell Li-Ion, or two and three cell Nickel or Alkaline based chemistries. The input voltage may vary above and below the output voltage and the output will remain in regula- tion. It works equally well for step up or down without the need for an inductor, providing low EMI DC/DC conversion. The high switching frequency allows the use of small surface-mount capacitors, saving board space and reducing cost. The REG711 is thermally protected and current limited, protecting the load and the regulator during fault conditions. Typical ground pin current (quiescent current) is 1mA at full load, 60 µA with no load, and less than 1µA in shutdown mode. This regulator comes in a thin MSOP-8 pack- age with a component height of less than 1.1mm. REG711 Copyright © 2000, Texas Instruments Incorporated SBVS027A Printed in U.S.A. February, 2001 www.ti.com C PUMP C IN PGND ENABLE GND C OUT R LED + + REG711 |
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