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REG711 PDF预览

REG711

更新时间: 2024-11-20 22:43:59
品牌 Logo 应用领域
德州仪器 - TI 转换器开关
页数 文件大小 规格书
10页 181K
描述
50mA SWITCHED-CAP DC/DC CONVERTER

REG711 数据手册

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REG711  
REG711  
www.ti.com  
50mA SWITCHED-CAP DC/DC CONVERTER  
FEATURES  
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.  
WIDE INPUT RANGE: 1.8V TO 5.5V  
5V VERSION: 2.7V TO 5.5V  
AUTOMATIC STEP-UP/STEP-DOWN  
OPERATION  
LOW INPUT CURRENT RIPPLE  
LOW OUTPUT VOLTAGE RIPPLE  
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,  
60µA 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.  
MINIMUM NUMBER OF EXTERNAL  
COMPONENTS—NO INDUCTORS  
1MHz INTERNAL OSCILLATOR ALLOWS  
SMALL CAPACITORS  
“SHUTDOWN” MODE  
THERMAL AND CURRENT LIMIT  
PROTECTION  
FIVE OUTPUT VOLTAGES AVAILABLE:  
5.0V, 3.3V, 3.0V, 2.7V, 2.5V  
THIN, SMALL PACKAGE: MSOP-8  
APPLICATIONS  
SMART CARD READERS  
CELLULAR PHONES  
CPUMP  
ENABLE  
SIM CARD SUPPLIES  
PORTABLE COMMUNICATION DEVICES  
PERSONAL DIGITAL ASSISTANTS  
MODEMS  
+
+
REG711  
R
CIN  
PGND  
COUT  
LED  
GND  
NOTEBOOK AND PALM-TOP COMPUTERS  
ELECTRONIC GAMES  
HANDHELD METERS  
PCMCIA CARDS  
CARD BUSES  
LCD DISPLAYS  
Copyright © 2000, Texas Instruments Incorporated  
SBVS027A  
Printed in U.S.A. February, 2001  

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