LTC1555L-1.8
SIM Power Supply and
Level Translator U FEATURES
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в– DESCRIPTIO The LTCВ®1555L-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. Buck/Boost Charge Pump Generates 1.8V, 3V or 5V
Input Voltage Range: 2.6V to 6V …