Overview
Features and Benefits
- Buck/Boost Charge Pump Generates 3V or 5V
- Input Voltage Range: 2.6V to 6V
- Controller VCC Range: 1.425V to 4.4V
- >10kV ESD on All SIM Contact Pins
- Short-Circuit and Overtemperature Protected
- 3V to 5V Signal Level Translators
- Very Low Operating Current: 40µA
- Very Low Shutdown Current: <1µA
- Soft-Start Limits Inrush Current at Turn-On
- 1MHz Switching Frequency
- Available in 16-Pin Narrow SSOP Package
Product Details
The LTC1555L 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.
Internal level translators allow controllers operating with supplies as low as 1.425V to interface with 3V and 5V SIMs. 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. Battery life is maximized by 40µA operating current, and 1µA shutdown current. Board area is minimized by the miniature 16-pin narrow SSOP packages and the need for only three small external capacitors.
Applications
- SIM Interface in GSM Cellular Telephones
- Smart Card Readers
Product Lifecycle
Production
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.
Documentation & Resources
-
R369 Reliability Data3/23/2018
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC1555LEGN#PBF | Material Declaration | Reliability Data | 16-Lead SSOP (Narrow 0.15 Inch) | |
| LTC1555LEGN#TRPBF | Material Declaration | Reliability Data | 16-Lead SSOP (Narrow 0.15 Inch) | |
| Wafer Fabrication Data | R369 Reliability Data |
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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