LTC1555

PRODUCTION

SIM Power Supply and Level Translator

Part Models: 4
1ku List Price: Starting From $4.12

Viewing:

Overview

Step-Up/Step-Down Charge Pump Generates 5V
Input Voltage Range: 2.7V to 10V
Output Current:
- 10mA (V_IN > 2.7V)
- 20mA (V_IN>3V)
3V to 5V Signal Level Translators
>10kV ESD on All SIM Contact Pins
Short-Circuit and Overtemperature Protected
Very Low Operating Current: 60µA
Very Low Shutdown Current: <1µA
Soft Start Limits Inrush Current at Turn-On
Programmable 3V or 5V Output Voltage
650kHz Switching Frequency
Auxiliary 4.3V LDO/Power Switch (LTC1556 Only)
Available in a 16- and 20-Pin Narrow SSOP

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 V_IN 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

Part Models: 4
1ku List Price: Starting From $4.12

Documentation

Data Sheet 1

LTC1555/LTC1556: SIM Power Supply and Level Translator Data Sheet 10/03/2017

Reliability Data 1

R369 Reliability Data 03/23/2018

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
LTC1555CGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1555CGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1555IGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1555IGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC1555CGN#PBF	PRODUCTION
LTC1555CGN#TRPBF	PRODUCTION
LTC1555IGN#PBF	PRODUCTION
LTC1555IGN#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1555CGN#PBF	PRODUCTION
LTC1555CGN#TRPBF	PRODUCTION
LTC1555IGN#PBF	PRODUCTION
LTC1555IGN#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC1555CGN#PBF	PRODUCTION
LTC1555CGN#TRPBF	PRODUCTION
LTC1555IGN#PBF	PRODUCTION
LTC1555IGN#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Latest Discussions

No discussions on LTC1555 yet. Have something to say?

Start a Discussion on EngineerZone®