Datasheet for LTC1555:
- Manufacturer Part Number : LTC1555
- Manufacturer : AD
- Description : SIM Power Supply and Level Translator
- Series : LTC1555
- Reference Price : USD 2.28
- Our Price : We have a better price, contact us by email
- Product Type : Inductorless (Charge Pump) DC/DC Converters
- Function : Regulated Buck-Boost Charge Pumps
- Current Suggest : Production
- Status : Production
- RoHS Status: -
- Voltage: -
- Feature: -
- Package Case: -
- Temperature Range: -
- Packing: Reel/Tray/Tube
- Standard Packing Quantity: -
- Country of Origin: -
- Other Part Number : LTC1555
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
Contact us to check the best price and real time inventory quantity for LTC1555. If you need any more information about LTC1555, you can also send us by email. Our email is [email protected], we will reply you in 12 hours.
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 60µA operating current and 1µA shutdown current. Board area is minimized by miniature 16- and 20-pin narrow SSOP packages and the need for only three small external capacitors.
Applications
- SIM Interface in GSM Cellular Telephones
- Smart Card Readers
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
