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LTC4555 PDF预览

LTC4555

更新时间: 2023-12-20 18:45:13
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
8页 157K
描述
SIM 电源和电平变换器

LTC4555 数据手册

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LTC4555  
SIM Power Supply  
and Level Translator  
FeaTures  
DescripTion  
The LTC®4555 provides power conversion and signal  
level shifting needed for low voltage 2.5G and 3G cellular  
telephones to interface with 1.8V or 3V subscriber identity  
modules (SIMs). The part meets all type approval require-  
ments for 1.8V and 3V SIMs and smart cards. The part  
contains an LDO linear regulator to supply SIM power at  
either 1.8V or 3V from a 3V to 6V input. The output volt-  
age is selected with a single pin and up to 50mA of load  
current can be supplied.  
n
SIM Power Supply: 1.8V/3V at 50mA  
n
Input Voltage Range: 3V to 6V  
n
Controller Voltage Range: 1.2V to 4.4V  
14kV ESD On All SIM Contact Pins  
n
n
Meets All ETSI, IMT-2000 and ISO7816 SIM/Smart  
Card Interface Requirements  
n
Level Translators to 1.8V or 3V  
n
20µA Operating Current  
n
Logic-Controlled Shutdown (I < 1µA)  
SD  
n
Available in a Low Profile, 16-Pin (3mm × 3mm)  
Internal level translators allow controllers operating with  
supplies as low as 1.2V to interface with 1.8V or 3V smart  
cards. Battery life is maximized by 20µA operating current  
and <1µA shutdown current. Board area is minimized by  
the 3mm × 3mm leadless QFN package.  
QFN Package  
applicaTions  
n
SIM Interface in 3G Cellular Telephones  
Smart Card Readers  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property  
of their respective owners.  
n
Typical applicaTion  
Typical SIM Interface  
V
BAT  
(1.2V TO 4.4V) (3V TO 6V)  
V
CC  
SIM/  
SMART CARD  
INTERFACE  
0.1µF  
0.1µF  
DV  
V
CC  
BAT  
SHDN  
V
CC  
V
CC  
V
1µF  
CONTROLLER  
SEL  
LTC4555  
GND  
R
RST  
CLK  
I/0  
RST  
CLK  
I/0  
IN  
C
IN  
DATA  
GND  
4555 TA01  
4555fc  
1
For more information www.linear.com/LTC4555  

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