LTC1555 - SIM Power Supplyand Level Translator

The LTC1555 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. 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. The LTC1556 also includes an auxiliary LDO Regulator power Switch that may be used to power the Frequency Synthesizer or other low power circuitry.
Battery life is maximized by 60A operating current and 1A shutdown current. Board area is minimized by miniature 16- and 20-pin narrow SSOP packages and the need for only three small external capacitors.
By Linear Technology Corporation
LTC1555 's PackagesLTC1555 's pdf datasheet
LTC1555CGN SSOP
LTC1555CGN-PBF SSOP
LTC1555CGN-TR SSOP
LTC1555CGN-TRPBF SSOP
LTC1555IGN-PBF SSOP
LTC1555IGN-TRPBF SSOP
LTC1555LEGN SSOP
LTC1555LEGN-PBF SSOP
LTC1555LEGN-TR SSOP
LTC1555LEGN-TRPBF SSOP
LTC1555LEGN-1.8 SSOP
LTC1555LEGN-1.8-TR SSOP




LTC1555 Pinout, Pinouts
LTC1555 pinout,Pin out
This is one package pinout of LTC1555,If you need more pinouts please download LTC1555's pdf datasheet.

LTC1555 Application circuits
LTC1555 circuits
This is one application circuit of LTC1555,If you need more circuits,please download LTC1555's pdf datasheet.


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