LTC4558 provides power conversion signal level translation needed adva
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LTC4558 Dual SIM/Smart Card Power Supply Interface FEATURES
LTC4558 provides power conversion signal level translation needed advanced cellular telephones interface with 1.8V subscriber identity modules (SIMs). device meets requirements 1.8V SIMs contains regulators power 1.8V cards from 2.7V 5.5V input. output voltages using voltage selection pins 50mA load current supplied. channel select determines which channel open communication. Separate enable pins each channel allow both cards powered once allow faster transition from channel other. Internal level translators allow controllers operating with supplies 1.4V interface with 1.8V Smart Cards. Battery life maximized operating current 65µA shutdown current less than 1µA. Board area minimized profile 0.75mm leadless package.
Lare registered trademarks Linear Technology Corporation. other trademarks property their respective owners. *Protected U.S. Patents, including 6356140.
Power Management Control Cards Smart Cards Independent 1.8V/3V Control Both Cards Supports Simultaneous Powering Both Cards Fast Channel Switching Automatic Level Translation Dynamic Pull-Ups Deliver Fast Signal Rise Times* Built-In Fault Protection Circuitry Automatic Activation/Deactivation Sequencing Circuitry Operating/Shutdown Current 10kV Card Pins Meets Fault Tolerance Requirements Profile 20-Lead (3mm 3mm) Package
APPLICATIONS
GSM, TD-SCDMA other Cellular Phones Wireless Point-of-Sale Terminals Multiple Card Interfaces
TYPICAL APPLICATION
DVCC VBATT 1.4V 4.4V DVCC 0.1µF DVCC CLKIN RSTIN DATA CLKRUNA µCONTROLLER CLKRUNB ENABLEA ENABLEB CSEL VSELA VSELB LTC4558 VCCB CLKB RSTB I/OB
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0.1µF VBATT I/OA RSTA CLKA VCCA 1.8V/3V CARD
Deactivation Sequence
RSTX 5V/DIV CLKX 5V/DIV I/OX 5V/DIV VCCX 2V/DIV CVCCX 10µs/DIV
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1.8V/3V CARD
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LTC4558 ABSOLUTE MAXIMUM RATINGS
(Note
PACKAGE/ORDER INFORMATION
VIEW ENABLEB RSTIN VSELB CLKRUNB CLKRUNA CSEL VSELA ENABLEA RSTA I/OA DATA CLKIN RSTB CLKB VCCB DVCC VBATT VCCA CLKA I/OB
VBATT, DVCC, DATA, RSTIN, CLKIN, CLKRUNA, CLKRUNB, ENABLEA, ENABLEB, CSEL, VSELA, VSELB -0.3V I/OA, CLKA, RSTA -0.3V VCCA 0.3V I/OB, CLKB, RSTB -0.3V VCCB 0.3V ICCA,B (Note .80mA VCCA,B Short-Circuit Duration Indefinite Operating Temperature Range (Note .-40°C 85°C Storage Temperature Range.-65°C 125°C
PACKAGE 20-LEAD (3mm 3mm) PLASTIC TJMAX 125°C, 68°C/W, 4.2°C/W EXPOSED (PIN GND, MUST SOLDERED
ORDER PART NUMBER LTC4558EUD
PART MARKING LCSH
Order Options Tape Reel: Lead Free: #PBF Lead Free Tape Reel: #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult Marketing parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER Input Power Supply VBATT Operating Voltage IVBATT Operating Current DVCC Operating Voltage IDVCC Operating Current IDVCC Shutdown Current IVBATT Shutdown Current Card Supplies VCCA,B Output Voltage VCCA,B Turn-On Time Channel Switching Time DVCC CONDITIONS
denotes specifications which apply over full operating temperature range, otherwise specifications 25°C. VBATT 3.3V, DVCC 1.8V, 1µF, unless otherwise specified.
UNITS
2.85 1.71 3.00
VCCA VCCB ICCA VCCA 1.8V, VCCB ICCA ICCB
3.15 1.89
Mode, ICCA,B 50mA 1.8V Mode, ICCA,B 30mA ICCA,B 0mA, ENABLEA,B VCCA,B Selected Voltage ENABLEA ENABLEB RSTIN DVCC CSEL RSTB
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LTC4558 ELECTRICAL CHARACTERISTICS
PARAMETER CLKA,B Level Output Voltage (VOL) High Level Output Voltage (VOH) Rise/Fall Time CLKA,B Frequency RSTA,B Level Output Voltage (VOL) High Level Output Voltage (VOH) Rise/Fall Time I/OA, I/OB Level Output Voltage (VOL) High Level Output Voltage (VOH) Rise/Fall Time Short-Circuit Current DATA Level Output Voltage (VOL) High Level Output Voltage (VOH) Rise/Fall Time Input Threshold (VIL) High Input Threshold (VIH) Input Current (IIH/IIL) Note Stresses beyond those listed under Absolute Maximum Ratings cause permanent damage device. Exposure Absolute Maximum Rating condition extended periods affect device reliability lifetime. Note This specification applies both Smart Card classes. Sink Current 500µA (VI/OA,B Source Current 20µA (VI/OA,B VCCA,B) Loaded with 50pF (10% 90%)
denotes specifications which apply over full operating temperature range, otherwise specifications 25°C. VBATT 3.3V, DVCC 1.8V, 1µF, unless otherwise specified.
CONDITIONS Sink Current 200µA (Note Source Current 200µA (Note Loaded with 50pF (10% 90%) (Note (Note Sink Current 200µA (Note Source Current 200µA (Note Loaded with 50pF (10% 90%) (Note Sink Current (VDATA (Note Source Current 20µA (VDATA VDVCC) (Note Loaded with 50pF (10% 90%) (Note VDATA (Note
UNITS
VCCA,B -0.2 VCCA,B -0.2 0.85 VCCA,B DVCC 0.15 DVCC 0.85 DVCC
ENABLEA, ENABLEB, RSTIN, CLKIN, CSEL, VSELA, VSELB, CLKRUNA, CLKRUNB
Note LTC4558E guaranteed meet performance specifications from 85°C. Specifications over -40°C 85°C operating temperature range assured design, characterization correlation with statistical process controls. Note Based long-term current density limitations.
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LTC4558 TYPICAL PERFORMANCE CHARACTERISTICS
Load Supply Current VBATT
VBATT SUPPLY CURRENT (µA) VBATT SUPPLY VOLTAGE TEMPERATURE (°C)
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25°C unless otherwise noted. VBATT Quiescent Current (IVBATT ICC) Load Current
VBATT QUIESCENT CURRENT (µA) 25°C VBATT 3.1V
I/OX Short-Circuit Current Temperature
VDVCC VBATT 5.5V VCCX I/OX SHORTED VCCX
25°C ICCA ICCB SHORT-CIRCUIT CURRENT (mA)
DROPOUT
VCCX
VCCX 1.8V
1000 10000 LOAD CURRENT (µA)
100000
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VBATT Shutdown Current Supply Voltage
VBATT SHUTDOWN CURRENT (µA) DVCC SHUTDOWN CURRENT (µA) -40°C VBATT SUPPLY VOLTAGE 25°C 85°C VDVCC 1.8V
DVCC Shutdown Current Supply Voltage
VBATT 5.5V -40°C 85°C
DVCC SUPPLY VOLTAGE
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LTC4558 TYPICAL PERFORMANCE CHARACTERISTICS
Data Channel, 40pF
I/0X 1V/DIV
25°C unless otherwise noted.
DATA 1V/DIV
200ns/DIV
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Deactivation Sequence, CVCCX
RSTX 5V/DIV CLKX 5V/DIV I/OX 5V/DIV VCCX 2V/DIV 20µs/DIV
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LTC4558 FUNCTIONS
DVCC (Pin Power. Reference voltage control logic. VBATT (Pin Power. Supply voltage analog sections LTC4558. VCCA,VCCB (Pins Card Socket. VCCA,VCCB pins should connected pins respective card sockets. activation VCCA,VCCB pins controlled ENABLEA ENABLEB. They 1.8V VSELA VSELB inputs. CLKA,CKLB (Pins 20): Card Socket. CLKA,CKLB pins should connected pins respective card sockets. CLKA,CKLB signals derived from CLKIN pin. They provide level shifted CLKIN signal selected card. CLKA,CKLB pins gated until VCCA,VCCB attain their correct values. When card socket deselected, left active brought using CLKRUNA, CLKRUNB pins. RSTA,RSTB (Pins 19): Card Socket. RSTA,RSTB pins should connected pins respective card sockets. RSTA,RSTB signals derived from RSTIN pin. When card selected, follows RSTIN. RSTA,RSTB pins gated until VCCA,VCCB attain their correct values. When card socket deselected, state latched current state. I/OA,I/OB (Pins 18): Card Socket. I/OA,I/OB pins should connected pins respective card sockets. When card selected, transmits/receives data to/from DATA pin. I/OA,I/OB pins gated until VCCA,VCCB attain their correct values. DATA (Pin Input/Output. Microcontroller side data pin. DATA provides bidirectional communication path both cards. cards selected communicate DATA time. possesses weak pull-up current source, allowing controller open drain output maintain HIGH state during shutdown, long DVCC powered. RSTIN (Pin Input. RSTIN supplies reset signal cards. level shifted transmitted directly selected card. CLKIN (Pin 10): Input. CLKIN supplies clock signal cards. level shifted transmitted directly selected card. CLKRUNA,B HIGH, clock signal will transmitted CLKA,B pin, regardless whether that card selected, long that card socket enabled. ENABLEA, ENABLEB (Pins 17): Inputs. ENABLEA ENABLEB pins enable disable channel channel respectively. VSELA, VSELB (Pins 16): Inputs. VSELA VSELB pins select voltage level each SIM/ Smart Card pins. Bringing either these pins HIGH will output level respective channel Bringing either these pins will output level respective channel 1.8V. CSEL (Pin 13): Input. CSEL selects which SIM/Smart Card pins active. CLKRUNA, CLKRUNB (Pins 15): Inputs. CLKRUNA CLKRUNB inputs used select whether clock signal always sent card sockets that enabled whether clock gated with CSEL pin. Exposed (Pin 21): Ground. This ground must soldered directly ground plane.
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LTC4558 BLOCK DIAGRAM
DVCC VBATT
VCCA
LDOA
LDOB
VCCB
DVCC
I/OA
I/OB
RSTA
RSTB
CLKA
CLKB
CLKRUNA DATA RSTIN CLKIN DVCC
CLKRUNB
CONTROL LOGIC
CSEL
ENABLEB
VSELA ENABLEA VSELB
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LTC4558 OPERATION
LTC4558 features independent SIM/Smart Card channels. Only these channels open communication time however both channels enabled made ready communication using ENABLEA ENABLEB pins. This allows faster transition from channel other. Each channel able produce voltage levels, 1.8V channel selection voltage selection controlled CSEL, VSELA VSELB pins shown table below:
Table Channel Voltage Truth Table
CSEL VSELA VSELB SELECTED CARD VOLTAGES 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V
BIDIRECTIONAL ISTART
Dynamic Pull-Up Current Sources current sources bidirectional pins (DATA,I/OA,B) dynamically activated achieve fast rise time with relatively small static current. Once bidirectional relinquished, small start-up current begins charge node. edge rate detector determines released comparing slew rate with internal reference value. valid transition detected, large pull-up current enhances edge rate node. higher slew rate corroborates decision charge node thereby affecting dynamic form hysteresis.
LOCAL SUPPLY
VREF
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Figure Dynamic Pull-Up Current Source
Bidirectional Channels bidirectional channels level shifted appropriate VCCA,B voltages I/OA,B pins. NMOS pass transistor performs level shifting. gate NMOS transistor biased such that transistor completely when both sides have relinquished channel. side channel asserts LOW, then transistor will convey other side. Note that current passes from receiving side channel transmitting side. output voltage receiving side will dependent upon voltage transmitting side plus drop pass transistor. When card socket selected, becomes candidate drive data DATA likewise receive data from DATA pin. When card socket deselected, will pulled HIGH communication with DATA will disabled. both channels disabled, weak pull-up ensures that DATA held HIGH, long DVCC powered.
Reset Channels When card selected, reset channel provides level shifted path from RSTIN selected card. When card deselected, last state RSTA,B latched. This allows deselected card remain active, therefore eliminates delays associated with card initialization. Clock Mode Various SIM/Smart Cards have different requirements state clock when channel open communication. CLKRUNA,B pins allow user select whether clock brought after channel deselected allowed run. channel enabled, bringing CLKRUN HIGH will transmit clock corresponding card socket, whether channel selected using CSEL.
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LTC4558 OPERATION
Activation/Deactivation Activation deactivation sequencing handled builtin circuitry. Each channel activated deactivated independently other. activation sequence each channel initiated bringing ENABLEA,B HIGH. activation sequence outlined below: RSTA,B, CLKA,B I/OA,B pins held LOW. VCCA,B enabled. After VCCA,B stable selected level, I/OA,B RSTA,B channels enabled. clock channel enabled rising edge second clock cycle after I/OA,B enabled. deactivation sequence initiated bringing ENABLEA,B LOW. deactivation sequence outlined below: reset channel disabled RSTA,B brought LOW. clock channel disabled CLKA,B brought clock cycles after ENABLEA,B brought LOW. clock running, clock channel will disabled approximately after ENABLEA,B brought LOW. channel disabled I/OA,B brought approximately after ENABLEA,B brought LOW. VCCA,B will depowered after I/OA,B brought LOW. activation deactivation sequences will take place every time card channel enabled disabled. When channel deselected using CSEL pin, RSTA,B state latched, I/OA,B channel becomes high impedance CLKA,B brought after maximum clock cycles. Fault Detection VCCA,B, I/OA,B, RSTA,B, CLKA,B DATA pins protected against short-circuit faults. While there logic outputs indicate that fault occurred, these pins will able tolerate fault condition until been removed. VCCA,B, I/OA,B, RSTA,B pins possess fault protection circuitry which will limit current available pins. Each capable supplying approximately 90mA (typ) before output voltage reduced. CLKA,B pins designed tolerate faults reducing current drive capability their output stages. After fault detected internal fault detection logic, logic waits fault detection delay elapse before reducing current drive capability output stage. reduced current drive allows LTC4558 detect when fault been removed.
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LTC4558 APPLICATIONS INFORMATION
10kV Protection Smart Card pins (CLKA,B, RSTA,B, I/OA,B, VCCA,B GND) withstand over 10kV human body model in-situ. order ensure proper protection, careful board layout required. should tied directly ground plane. VCCA,B capacitors should located very close VCCA,B pins tied immediately ground plane. Capacitor Selection total four capacitors required operate LTC4558. input bypass capacitor required VBATT DVCC. Output bypass capacitors required each Smart Card pins. There several types ceramic capacitors available, each having considerably different characteristics. example, ceramic capacitors have excellent voltage temperature stability relatively packing density. ceramic capacitors have apparently higher packing density poor performance over their rated voltage temperature ranges. Under certain voltage temperature conditions Y5V, ceramic capacitors compared directly case size rather than specified value desired minimum capacitance. VCCA,B outputs should bypassed with capacitor. ceramic capacitor recommended each ensure compliance. VBATT DVCC should bypassed with 0.1µF ceramic capacitors. Compliance Testing Inductance long leads type approval equipment cause ringing overshoot that leads testing problems. Small amounts capacitance damping resistors included application without compromising normal electrical performance LTC4558 Smart Card system. Generally resistor 20pF capacitor will accomplish this, shown Figure
LTC4558 VCCA,B CLKA,B RSTA,B I/OA,B 20pF
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20pF 20pF
20pF SMART CARD SOCKET
Figure Additional Components Improved Compliance Testing
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LTC4558 PACKAGE Package 20-Lead Plastic (3mm 3mm) (Reference 05-08-1720
0.70 ±0.05 3.50 0.05 SIDES)
1.65 0.05
2.10 0.05
PACKAGE OUTLINE 0.20 ±0.05 0.40 RECOMMENDED SOLDER PITCH DIMENSIONS APPLY SOLDER MASK AREAS THAT SOLDERED BOTTOM VIEW-EXPOSED NOTCH 0.20 0.25 CHAMFER 0.40 0.10 1.65 0.10 (4-SIDES)
3.00 0.10 SIDES) MARK (NOTE
0.75 0.05 0.05
0.115
(UD20) 0306
0.200 0.00 0.05 NOTE: DRAWING JEDEC PACKAGE OUTLINE DRAWING SCALE DIMENSIONS MILLIMETERS DIMENSIONS EXPOSED BOTTOM PACKAGE INCLUDE MOLD FLASH. MOLD FLASH, PRESENT, SHALL EXCEED 0.15mm SIDE EXPOSED SHALL SOLDER PLATED SHADED AREA ONLY REFERENCE LOCATION BOTTOM PACKAGE
0.20 0.05 0.40
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Information furnished Linear Technology Corporation believed accurate reliable. However, responsibility assumed use. Linear Technology Corporation makes representation that interconnection circuits described herein will infringe existing patent rights.
LTC4558 TYPICAL APPLICATION
DVCC VBATT 1.4V 4.4V DVCC 0.1µF 0.1µF ENABLEA ENABLEB CSEL VSELA VCCB CLKB RSTB
4558 TA01a
DVCC CLKIN RSTIN DATA CLKRUNA
VBATT I/OA RSTA CLKA VCCA
1.8V/3V CARD
µCONTROLLER
CLKRUNB
1.8V/3V CARD
I/OB VSELB LTC4558
RELATED PARTS
PART NUMBER LTC1555L/ LTC1555L-1.8 LTC1555/LTC1556 LTC1755/LTC1756 DESCRIPTION 1MHz, Power Supply Level Translator 1.8V/3V/5V Cards 650kHz, Power Supply Level Translator 3V/5V Cards 850kHz, Smart Card Interface with Serial Control 3V/5V Smart Card Applications Dual Smart Card Interface with Serial Control 1.8V/3V/5V Smart Card Applications 900kHz, Power Supply 3V/5V Cards COMMENTS VIN: 2.6V 6.6V, VOUT 1.8V/3V/5V, 32µA, 1µA, SSOP16 VIN: 2.7V 10V, VOUT 3V/5V, 60µA, 1µA, SSOP16, SSOP20 VIN: 2.7V VOUT 3V/5V, 60µA, 1µA, SSOP16, SSOP24
LTC1955
VIN: 5.5V, VOUT 1.8V/3V/5V, 200µA, 1µA, QFN32
LTC1986 LTC4555 LTC4556 LTC4557
VIN: 2.6V 4.4V, VOUT 3V/5V, 14µA, 1µA, ThinSOT
Power Supply Level Translator VIN: VOUT 1.8V/3V, 40µA, 1µA, QFN16 1.8V/3V Cards Smart Card Interface with Serial Control Dual SIM/Smart Card Power Supply Level Translator 1.8V/3V Cards VIN: 2.7V 5.5V, VOUT 1.8V/3V/5V, 250µA, 1µA, QFN24 VIN: 2.7V 5.5V, VOUT 1.8V/3V, 250µA, 1µA, QFN16
ThinSOT trademark Linear Technology Corporation.
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Linear Technology Corporation
(408) 432-1900 FAX: (408) 434-0507
0107 PRINTED
1630 McCarthy Blvd., Milpitas, 95035-7417
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2007
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