LTC4555EUD#PBF

Overview

The LTC4555EUD#PBF is a specialized interface integrated circuit designed for SIM power supply and signal level translation. It provides the necessary power conversion and voltage shifting required for low-voltage 2.5G and 3G cellular telephones to interface with 1.8V or 3V SIM cards. The device operates within an input voltage range of 2.7V to 5.5V and delivers up to 100mA of output current. It features a compact 16-WFQFN (3x3) package with exposed pad, suitable for surface-mount installation. The operating junction temperature range spans from -40°C to 125°C.

Feature Summary

• Provides simultaneous power conversion and signal level translation for SIM interfaces
• Supports operation with both 1.8V and 3V SIM cards in low-voltage cellular applications
• Integrates high-side switch control for efficient power management

Applications

• 2.5G cellular telephone systems
• 3G cellular telephone systems
• SIM card interface circuits
• Smart card interface modules

Procurement Notes

Verify the specific suffix and tape/reel quantity against the manufacturer's latest datasheet before ordering. Confirm that the 16-WFQFN footprint matches your PCB layout requirements. Ensure the input voltage supply aligns with the 2.7V to 5.5V operational range specified for this component.

Selection Notes

Select this component when designing cellular handsets requiring integrated SIM power regulation and level shifting. It is appropriate for applications needing to drive 1.8V or 3V SIMs from higher system voltages. Consider the thermal performance of the exposed pad package for high-temperature environments.

Part Context

This part belongs to the Analog Devices (formerly Linear Technology) portfolio of specialized interface ICs. It addresses the specific needs of mobile communication devices by combining power management and logic level translation into a single small-footprint solution, reducing component count in cellular phone designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices technical support for qualified alternatives if this specific package or suffix is unavailable.