LT LTC4555EUD#TRPBF

电源管理，信号电平转换手机

Overview

The LTC4555EUD 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 requirements 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 voltage is selected with a single pin 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 20µA operating current and <1µA shutdown current. Board area is minimized by the 3mm x 3mm leadless QFN package.

Features

Tape & Reel (TR) Package
16-WFQFN Exposed Pad package
Tape & Reel (TR)
16 terminations

Surface Mount Mounting Type

Applications

There are a lot of Linear Technology/Analog Devices
LTC4555EUD#TRPBF RF Misc ICs and Modules applications.

• Variable matched attenuator
• Phase shifter
• Cellular base stations
• Radio links
• Fixed wireless access
• Broadband/CATV
• RF/IF analog multiplexer
• Balanced modulation
• Demodulation
• Synchronous detection