LTC4557 - Dual SIM/Smart Card Power Supply and Interface

The LTC®4557 provides power conversion and signal level translation needed for 2.5G and 3G cellular telephones to interface with 1.8V or 3V subscriber identity modules (SIMs). The part meets all requirements for 1.8V and 3V SIMs. The part contains LDO regulators to power 1.8V or 3V SIM cards from a 2.7V to 5.5V input. The output voltages can be set using the two voltage selection pins and up to 50mA of load current can be supplied.

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 a low operating current of less than 100µA and a shutdown current of less than 1µA. Board area is minimized by the low profile 3mm x 3mm x 0.75mm leadless QFN package.

*U.S. Patent No. 6,356,140

特点
  • Power Management and Signal Level Translators for Two SIM Cards or Smart Cards
  • Independent 1.8V/3V VCC Control for Both Cards
  • Automatic Level Translation
  • ISO7816, ETSI and EMV Compatible
  • Dynamic Pull-Ups Deliver Fast Signal Rise Times*
  • Built-In Fault Protection Circuitry
  • Automatic Activation/Deactivation Sequencing Circuitry
  • Low Operating/Shutdown Current
  • >10kV ESD on SIM Card Pins
  • Compatible with EMV Fault Tolerance Requirements
  • Available in 16-Lead (3mm ´ 3mm) QFN Package
典型应用
LTC4557 Typical Application
LTC4557 Typical Application
应用
  • GSM and 3G Cellular Phones
  • Wireless P.O.S. Terminals
  • Multiple SAM Card Interface
封装信息
LTC4557 Package Drawing
Order Information 订购型号
器件型号封装温度价格 (以 1 ~ 99 片为批量)价格 (以 1000 片为批量) *
LTC4557EUD#PBF3x3 QFN-16E$2.14$1.50
LTC4557EUD#TRPBF3x3 QFN-16E$1.56
演示电路板
器件型号描述价格
DC709ALTC4557EUD | Dual SIM Card Power Supply and Interface$100.00
数据表
可靠性数据
CAD 符号
相关产品
LTC4557 - Dual SIM/Smart Card Power Supply and Interface
R527 Reliability Data
LTC4557 Footprints and Symbols