LTC1555L-1.8是SIM Power Supply and Level Translator

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LTC1555L-1.8 - LTC1555L-1.8是SIM Power Supply and Level Translator

LTC1555L-1.8是Linear公司的一款SIM 接口产品，LTC1555L-1.8是SIM Power Supply and Level Translator，本站介绍了LTC1555L-1.8的封装应用图解、特点和优点、功能等，并给出了与LTC1555L-1.8相关的凌力尔特元器件型号供参考。

LTC1555L-1.8 - SIM Power Supply and Level Translator

LTC1555L-1.8 - SIM Power Supply and Level Translator - Linear Technology（凌力尔特）

功能描述

The LTC1555L-1.8 provides power conversion and level shifting needed for low voltage GSM and WCDMA cellular telephones to interface with either 1.8V, 3V or 5V subscriber identity modules (SIMs). The part contains a patented buck/boost charge pump DC/DC converter* that delivers a regulated VCC supply voltage to the SIM card. Input voltage may range from 2.6V to 6V allowing direct connection to the battery. The output voltage may be programmed to 1.8V, 3V, 5V or direct connection to the VIN pin.

Internal level translators allow controllers operating with supplies as low as 1.425V to interface with 1.8V, 3V and 5V SIMs. A soft-start feature limits inrush current at turn-on, mitigating start-up problems that may result when the input is supplied by another low-power DC/DC converter. Battery life is maximized by 32µA operating current, and 1µA shutdown current. Board area is minimized by the miniature 16-pin narrow SSOP packages and the need for only three small external capacitors.

特点

Buck/Boost Charge Pump Generates 1.8V, 3V or 5V

Input Voltage Range: 2.6V to 6V

Controller VCC Range: 1.425V to 4.4V

>10kV ESD on All SIM Contact Pins

Short-Circuit and Overtemperature Protected

Meets all ETSI and IMT-2000 SIM Interface Requirements

1.8V to 5V Signal Level Translators

Very Low Operating Current: 32µA

Very Low Shutdown Current: <1µA

Soft-Start Limits Inrush Current at Turn-On

1MHz Switching Frequency