LTC1556CGN#TRPBF

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Analog Devices Inc./Maxim Integrated

SIM POWER SUPPLY AND LEVEL TRANSLATOR

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LTC1556CGN#TRPBF

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Analog Devices Inc./Maxim Integrated

SIM POWER SUPPLY AND LEVEL TRANSLATOR

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC1556 Series

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 VINpin.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.ApplicationsSIM Interface in GSM Cellular TelephonesSmart Card Readers

Technical Specifications

Parameters and characteristics for this part

Specification	LTC1556CGN#TRPBF

Channel Type	Bidirectional
Channels per Circuit	1
Features	Thermal-Shutdown Protection, SIM Card Interface
Mounting Type	Surface Mount
Number of Circuits	1
Operating Temperature (Max)	70 °C
Operating Temperature (Min)	0 °C
Output Type	Open Drain
Package Length	0.154 in
Package Name	20-SSOP
Package Width	3.9 mm
Translator Type	Voltage Level
Voltage - VCCA (Max)	5.5 V
Voltage - VCCA (Min)	1.8 V
Voltage - VCCB (Max)	10 V
Voltage - VCCB (Min)	2.7 V

LTC1556 Series

SIM Power Supply and Level Translator

Part	Output Type	Mounting Type	Channels per Circuit	Number of Circuits	Voltage - VCCA (Min)	Voltage - VCCA (Max)	Features	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - VCCB (Min)	Voltage - VCCB (Max)	Package Width	Package Name	Package Length	Translator Type	Channel Type
Analog Devices Inc./Maxim Integrated LTC1556IGN#TRPBF	Open Drain	Surface Mount	1	1	1.8 V	5.5 V	SIM Card Interface Thermal-Shutdown Protection	85 °C	-40 °C	2.7 V	10 V	3.9 mm	20-SSOP	0.154 in	Voltage Level	Bidirectional
Analog Devices Inc./Maxim Integrated LTC1556CGN#TRPBF	Open Drain	Surface Mount	1	1	1.8 V	5.5 V	SIM Card Interface Thermal-Shutdown Protection	70 °C	0 °C	2.7 V	10 V	3.9 mm	20-SSOP	0.154 in	Voltage Level	Bidirectional
Analog Devices Inc./Maxim Integrated LTC1556IGN#PBF	Open Drain	Surface Mount	1	1	1.8 V	5.5 V	SIM Card Interface Thermal-Shutdown Protection	85 °C	-40 °C	2.7 V	10 V	3.9 mm	20-SSOP	0.154 in	Voltage Level	Bidirectional
Analog Devices Inc./Maxim Integrated LTC1556CGN#PBF	Open Drain	Surface Mount	1	1	1.8 V	5.5 V	SIM Card Interface Thermal-Shutdown Protection	70 °C	0 °C	2.7 V	10 V	3.9 mm	20-SSOP	0.154 in	Voltage Level	Bidirectional

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Tape and Reel Packaging

LTC1556CGN#TRPBF | Datasheet

R369 Reliability Data