LTC4555EUD Linear Technology, LTC4555EUD Datasheet

IC SIM PWR SUP/LVL TRNSLTR 16QFN

LTC4555EUD

Manufacturer Part Number
LTC4555EUD
Description
IC SIM PWR SUP/LVL TRNSLTR 16QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC4555EUD

Function
Power Management, Signal Level Translation
Rf Type
Cellular
Secondary Attributes
SIM & Smart Card Interface
Package / Case
16-WFQFN Exposed Pad
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC4555EUD
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC4555EUD
Manufacturer:
LT
Quantity:
20 000
Company:
Part Number:
LTC4555EUD
Quantity:
2 500
Part Number:
LTC4555EUD#PBF
Manufacturer:
LT
Quantity:
33
Part Number:
LTC4555EUD#TRPBF
Manufacturer:
ZETEX
Quantity:
500
Part Number:
LTC4555EUD#TRPBF
Manufacturer:
LINEAR/PBF
Quantity:
218
Part Number:
LTC4555EUD#TRPBF
Manufacturer:
ADI/亚德诺
Quantity:
20 000
APPLICATIONS
TYPICAL APPLICATION
FEATURES
n
n
n
n
n
n
n
n
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n
n
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 (I
Available in a Low Profi le, 16-Pin (3mm × 3mm)
QFN Package
SIM Interface in 3G Cellular Telephones
Smart Card Readers
CONTROLLER
SD
< 1μA)
V
CC
0.1μF
(1.2V TO 4.4V)
Typical SIM Interface
SHDN
V
R
C
DATA
DV
SEL
IN
IN
CC
LTC4555
GND
(3V TO 6V)
DESCRIPTION
The LTC
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 require-
ments 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 volt-
age 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 × 3mm leadless QFN package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
V
V
BAT
BAT
RST
CLK
V
I/0
CC
®
0.1μF
4555 provides power conversion and signal
1μF
and Level Translator
GND
V
RST
CLK
I/0
SMART CARD
CC
INTERFACE
SIM/
SIM Power Supply
4555 TA01
LTC4555
4555fb
1

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LTC4555EUD Summary of contents

Page 1

... Battery life is maximized by 20μA operating current and <1μA shutdown current. Board area is minimized by the 3mm × 3mm leadless QFN package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical SIM Interface ...

Page 2

... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC4555EUD#PBF LTC4555EUD#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER High Level Input Current ( Low Level Input Current ( High Level Output Voltage ( Low Level Output Voltage ( DATA ...

Page 4

LTC4555 TYPICAL PERFORMANCE CHARACTERISTICS V Short-Circuit Current CC 170 150 130 110 –40 20 –20 0 TEMPERATURE (°C) PIN FUNCTIONS SHDN (Pin 1): Controller Driven Shutdown Pin. This pin should be high (DV ) for normal operation ...

Page 5

BLOCK DIAGRAM PROCESSOR V CC SHUTDOWN PIN V SIM VOLTAGE SELECT RESET FROM PROCESSOR CLOCK FROM PROCESSOR DATA TO/ FROM SIM CELL PHONE PROCESSOR INTERFACE V BAT ( BAT 0.1μF SHDN 1 ...

Page 6

LTC4555 APPLICATIONS INFORMATION The LTC4555 provides both regulated power and internal level translators to allow low voltage controllers to interface with 1. SIMs or smart cards. The part meets all ETSI, IMT-2000 and ISO7816 requirements for SIM and ...

Page 7

... ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. UD Package 16-Lead Plastic QFN (3mm × ...

Page 8

... SIM Power Supply for 3V/5V SIM Cards LTC3250-1.5 250mA,1.5MHz, High Effi ciency Step-Down Charge Pump LTC3251 500mA,1MHz to 16MHz, Spread Spectrum, Step-Down Charge Pump ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 8 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

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