The LTC1555LEGN is an advanced SIM Power Supply and Level Translator chip designed by Linear Technology to meet the demands of modern mobile communication devices. This product stands out for its compact design and efficiency, making it an ideal choice for applications where space is at a premium and power conservation is crucial.

Key Features

• Integrated Solution: The LTC1555LEGN combines a SIM power supply and level translator in one package, reducing the number of components required on a mobile device's motherboard.
• Low Voltage Operation: It operates from a single low voltage input ranging from 2.7V to 5.5V, accommodating a variety of power sources and ensuring compatibility with different system voltages.
• High Efficiency: The device's high-efficiency switched capacitor voltage converter provides up to 50mA of output current to the SIM card, optimizing battery life for the end device.
• Programmable Current Limit: The LTC1555LEGN features a programmable current limit for the SIM supply, which helps in protecting the SIM card and the power supply from damage due to fault conditions.
• Low Profile Package: Housed in a low profile (0.75mm) 16-lead narrow SSOP package, it saves precious board space and is suitable for the slim profiles of modern portable electronics.

Applications

The LTC1555LEGN is tailored for applications in the mobile communications field, such as:

• Cellular Phones
• Smart Phones
• Personal Digital Assistants (PDAs)
• Wireless Modems

Technical Specifications

Some of the technical specifications of the LTC1555LEGN include:

• Supply Voltage: 2.7V to 5.5V
• Output Current: Up to 50mA
• Low Standby Current
• Soft-Start Feature to Limit Inrush Current
• Automatic Level Translation Between SIM and Logic Voltages

With its robust feature set, the LTC1555LEGN by Linear Technology is a versatile and reliable component for powering and interfacing SIM cards in a wide range of portable electronic devices.