LTC1555L
SIM Power Supply and
Level Translator U FEATURES
в–
в–
в–
в–
в–
в–
в–
в–
в–
в–
в– DESCRIPTIO The LTCВ®1555L provides power conversion and level
shifting needed for low voltage GSM cellular telephones to
interface with either 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 3V, 5V or direct
connection to the VIN pin. Buck/Boost Charge Pump Generates 3V or 5V
Input Voltage Range: 2.6V to 6V …