Datasheet Linear Technology LTC1555IGN#PBF

LTC1555/LTC1556
SIM Power Supply
and Level Translator U DESCRIPTION FEATURES
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в–  The LTCВ®1555/LTC1556 provide power conversion and
level shifting needed for 3V GSM cellular telephones to
interface with either 3V or 5V Subscriber Identity Modules (SIMs). These parts contain a charge pump DC/DC
converter that delivers a regulated 5V to the SIM card.
Input voltage may range from 2.7V to 10V, allowing
direct connection to the battery. Output voltage may be
programmed to 3V, 5V or direct connection to the VIN pin. Step-Up/Step-Down Charge Pump Generates 5V
Input Voltage Range: 2.7V to 10V
Output Current: 10mA (VIN ≥ 2.7V) …