Linear LTC4555EUD Schematic [ru]

LTC4555

SIM Power Supply

and Level Translator

FEATURES

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 (ISD < 1μA)

Available in a Low Proﬁ le, 16-Pin (3mm × 3mm)

QFN Package

APPLICATIONS

SIM Interface in 3G Cellular Telephones

Smart Card Readers

TYPICAL APPLICATION

DESCRIPTION

The LTC®4555 provides power conversion and signal 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 requirements 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 voltage 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.

CONTROLLER

Typical SIM Interface

GND

BAT

(3V TO 6V)

BAT

RST

CLK

I/0

0.1μF

1μF

SIM/

SMART CARD

INTERFACE

RST

CLK

I/0

GND

4555 TA01

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(1.2V TO 4.4V)

0.1μF

SHDN

SEL

DATA

LTC4555

PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS

(Note 1)

, DVCC, VCC to GND ............................ –0.3V to 6.5V

BAT

Digital Inputs to GND ................................ –0.3V to 6.5V

CLK, RST, I/O to GND .......................–0.3V to V

Short-Circuit Duration ................................... Inﬁ nite

+ 0.3V

Operating Temperature Range (Note 2).... –40°C to 85°C

Junction Temperature ........................................... 125°C

Storage Temperature Range ...................–65°C to 125°C

SEL

16-LEAD (3mm s 3mm) PLASTIC QFN

JMAX

EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB

TOP VIEW

DATA

RINC

I/O

CLK

GND

RST

16 15 14 13

1SHDN

5 6 7 8

BAT

UD PACKAGE

= 125°C, θJA = 68°C/W, θJC = 4.2°C/W

ORDER INFORMATION

LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE

LTC4555EUD#PBF LTC4555EUD#TRPBF LAAA

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 cations, go to:

http://www.linear.com/leadfree/

http://www.linear.com/tapeandreel/

16-Lead (3mm × 3mm) Plastic QFN

–40°C to 85°C

ELECTRICAL CHARACTERISTICS

The l denotes the speciﬁ cations which apply over the full operating temperature range, otherwise speciﬁ cations are at TA = 25°C.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Operating Voltage

BAT

Operating Current ICC = 0mA

BAT

Shutdown Current SHDN = 0V, V

BAT

Operating Voltage

Operating Current f

Shutdown Current SHDN = 0V

Undervoltage Lockout

Output Voltage V

V V

CLK

SEL SEL SEL

= 1MHz

= DVCC, V = DVCC, V = 0, V

= 4.5V

BAT

= 3V, I

BAT

= 3.3V to 6V, I

BAT

= 2.6V to 6V, I

BAT

= 50mA

VCC

= 0mA to 50mA

VCC

= 0mA to 50mA

VCC

VCC Short-Circuit Current VCC Shorted to GND 60 110 175 mA

Controller Inputs/Outputs

Input Voltage Range SHDN, V

Input Current (I

High Input Threshold Voltage (V

Low Input Threshold Voltage (V

) SHDN, V

IH/IIL

High Input Threshold Voltage (VIH) SHDN, V

Low Input Threshold Voltage (V

) SHDN, V

, RIN, CIN, DATA 0 DV

SEL

, RIN, C

, C

SEL

36V

20 30 μA

1.2 4.4 V

510μA

0.5 1.1 V

2.8

1.7

–100 100 nA

0.2 × DV

0.4 V

3.0

1.8

0.7 × DV

1μA

3.2

1.9

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V V V

LTC4555

ELECTRICAL CHARACTERISTICS

The l denotes the speciﬁ cations which apply over the full operating temperature range, otherwise speciﬁ cations are at T

PARAMETER CONDITIONS MIN TYP MAX UNITS

High Level Input Current (I

Low Level Input Current (I

High Level Output Voltage (V

Low Level Output Voltage (VOL)DATA I

DATA Pull-Up Resistance Between DATA and DV

SIM Inputs/Outputs (V

High Level Output Voltage (V

Low Level Output Voltage (V

High Level Output Voltage (V

Low Level Output Voltage (V

I/O Pull-Up Resistance Between I/O and V

SIM Inputs/Outputs (V

High Level Output Voltage (V

Low Level Output Voltage (VOL) I/O, IOL = –1mA, DATA = 0V

High Level Output Voltage (V

Low Level Output Voltage (VOL) RST, CLK, IOL = –200μA

I/O Pull-Up Resistance Between I/O and V

SIM Timing Parameters

CLK Rise/Fall Time C

RST, I/O Rise/Fall Time RST, I/O Loaded with 30pF, V

Max CLK Frequency 5MHz

Turn-On Time SHDN = 1, (Note 3) 0.5 ms

Discharge Time to 1V SHDN = 0, (Note 3) 0.5 ms

)DATA

) DATA

)DATA I

= 3V)

) I/O, IOH = 20μA, DATA = DV

) I/O, IOL = –1mA, DATA = 0V

) RST, CLK, IOH = 20μA

) RST, CLK, IOL = –200μA

= 1.8V)

) I/O, IOH = 20μA, DATA = DV

) RST, CLK, IOH = 20μA

= 30pF, VCC = 1.8V/3V

CLK

= 25°C.

= 20μA, I/O = V

= –200μA, I/O = 0V

= 1.8V/3V

–20 20 μA

0.7 × DV

13 20 30 kΩ

0.8 × V

0.9 × V

6.5 10 14 kΩ

0.8 × V

0.9 × V

0.2 × VCC

6.5 10 14 kΩ

1mA

0.4 V

0.3 V

18 ns

1μs

Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.

Note 2: The LTC4555E is guaranteed to meet performance speciﬁ cations from 0°C to 85°C. Speciﬁ cations over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls.

Note 3: Speciﬁ cation is guaranteed by design and not 100% tested in production.

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