LTC4555
PRODUCTIONSIM Power Supply and Level Translator
- Part Models
- 2
- 1ku List Price
- Starting From $1.89
Overview
- SIM Power Supply: 1.8V/3V at 50mA
- Input Voltage Range: 3V to 6V
- Controller Voltage Range: 1.2V to 4.4V
- 14kV ESD on all SIM Contact Pins
- Meets all ETSI, IMT-2000 and ISO7816 SIM/Smart Card Interface Requirements
- Level Translators to 1.8V or 3V
- 20µA Operating Current
- Logic Controlled Shutdown (ISD < 1µA)
- Available in 0.75mm Profile, 3mm x 3mm QFN Package
The LTC4555 provides power conversion and signal level shifting needed for low voltage 2.5G and 3G cellular telephones to interface with 1.8V or 3V subscriber identity modules (SIMs). The part meets all type approval requirements for 1.8V and 3V SIMs and smart cards. The part contains an LDO linear regulator to supply SIM power at either 1.8V or 3V from a 3V to 6V input. The output voltage is selected with a single pin and up to 50mA of load current can be supplied.
Internal level translators allow controllers operating with supplies as low as 1.2V to interface with 1.8V or 3V smart cards. Battery life is maximized by 20µA operating current and <1µA shutdown current. Board area is minimized by the 3mm x 3mm leadless QFN package.
Applications
- SIM Interface in 3G Cellular Telephones
- Smart Card Readers
Documentation
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4555EUD#PBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC4555EUD#TRPBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC4555EUD#PBF | PRODUCTION | |
| LTC4555EUD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4555
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
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