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MIC4555 sim card level shifter with 50ma ldo mlf and micro lead frame are registered trademark amkor technology inc. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 ( 408 ) 944-01200 ? fax + 1 (408) 474-1000 ? http://www.micrel.com general description the MIC4555 is a digital level shifter with a 50ma ldo for sim card interfaces. there are three high-speed level shifters for sim card signal translation. the level shifters are designed to support high-speed clocking up to 5mhz. the 50ma ldo provides power for the sim card to eliminate the need for a separate power device. this simplifies the design of the sim card interface. the MIC4555 is available in a tiny, lead-free, 16-pin mlf ? package (3mm x 3mm), and is specified to operate from ? 40c to +125c junc tion temperature. data sheets and support documentation can be found on micrel?s web site at: www.micrel.com . features ? powers 1.8v or 3v sim up to 50ma ? input voltage 2.7v to 5.5v ? controller voltage 1.6v to 5.5v ? supports clock rates greater than 5mhz ? 8kv esd protection on sim contact pins ? 16-pin 3mm x 3mm mlf ? package ? ? 40c to +125c junction temperature range applications ? sim card interface for 3g/4g systems ? wireless pc cards ? smart card readers ____________________________________________________________________________________________________________ typical application typical sim/smart card interface september 2011 m9999-092311-b
micrel inc. MIC4555 september 2011 2 m9999-092311-b ordering information part number marking code ldo output voltage junction temperature range package MIC4555yml 4555 1.8v/3.0v ?40c to +125 c 3mm x 3mm 16-pin mlf ? pin configuration 3mm x 3mm mlf ? (top view) pin description pin number pin name description 1 en enable input from controller. this pin should be high (dv cc ) for normal operation and low ( < 0.4v) to activate a low-current shutdown mode. 2 v sel v cc voltage select input from the controller. a low level selects v cc = 1.8v while driving this pin to dv cc selects v cc = 3v. 3 dv cc supply voltage for the c ontroller side i/o pins (c in , r in , data). when below 1.1v typical, the v cc supply is disabled. this pin should be bypassed with a 1 f ceramic capacitor close to the pin. 4 n/c not connected. 5 v bat sim ldo supply input. this pin can function between 2.7v and 5.5v for normal operation. this pin should be bypassed with a 1 f ceramic capacitor close to the pin. 6 n/c not connected 7 v cc sim ldo output provides sim card v cc supply. a 1 f low-esr capacitor should be connected close to the v cc pin for stable operation. this pin is discharged to gnd during shutdown. 8 i/o sim data i/o. the sim card output must be on an open drain dr iver capable of sourcing >1ma. 9 rst reset output pin for the sim card. 10 gnd common ground for the sim and controller side. 11 clk clock output pin for the sim card. this pin is pulled to ground during shutdown. 12 n/c not connected. 13 c in clock input from the controller.
micrel inc. MIC4555 september 2011 3 m9999-092311-b pin description (continued) pin number pin name description 14 r in reset input from the controller. 15 data controller side data i/o. this pin is used for bidire ctional data transfer. the controller output must be an open-drain configuration. the open drain output must be capabl e of sinking greater than 1ma. 16 n/c not connected epad hs pad heat sink pad. connect to gnd.
micrel inc. MIC4555 september 2011 4 m9999-092311-b absolute maximum ratings (1) supply voltages (dv cc , v bat , v cc , v sel )......... ? 0.3 to +6.0v input logic (r in , c in , data) (2) ......................... ? 0.3 to +6.0v lead temperature (sol dering, 5s ).............................. 260c storage temperature (t s )............................. ? 65 to +150c esd rating (3) ................................................ 2kv to any pin esd rating (rst, clk, i/o, v cc pins) (3) ........... 8kv to gnd operating ratings (4) supply voltage (v bat )................................... +2.7v to +5.5v supply voltage (dv cc ) ....................................+1.6v to v bat logic inputs (r in , c in , data)............................. 0v to dv cc logic inputs (en, v sel )......................................... 0v to v bat storage temperature (t s )............................. ? 45 to +125c package thermal resistance 3mm x 3mm mlf ? -16l ( ja ) .............................59c/w electrical characteristics ? general t a =25 o c, v bat = 4.3v, c vcc = 1f unless otherwise noted. bold values indicate ? 40c t j 125 c. parameter symbol condition min. typ. max. unit v bat shutdown current i sd v en = 0v, all outputs disabled 0.1 1 a v cc = 1.8v, i cc = 0ma 41 80 v bat operating current i opbat v cc = 3.0v, i cc = 0ma 47 80 a dv cc shutdown current i sd v en = 0v, all outputs disabled 0.1 1 a dv cc operating current i opdvcc f clk = 1mhz, t r/f = 10ns, dv cc = 5.5v 3.5 a dv cc undervoltage lock-out threshold (uvlo) v uvlo 0.8 1.1 1.4 v over-temperature shutdown threshold t th 150 c over-temperature hysteresis t hys 10 c when disabled, i out = 3ma. active pull- down on v cc . 260 auto discharge nfet resistance (5) r pd when disabled, i out = 3ma. active pull- down on rst, clk. 100 electrical characteristics ? sim power supply and level translator t a = 25 o c, v bat = 4.3v, c vcc = 1f unless bold values indicate ? 40 c t j 125 c. parameter symbol condition min. typ. max. unit en, v sel high input threshold v ih 1.2 v en, v sel low input threshold v il 0.4 v controller voltage input dv cc 1.6 v bat v rin, cin high input threshold v ih 0.7dv cc v rin, cin low input threshold v il 0.2dv cc v data output high v oh i oh = 20a, i/0 = v cc 0.7dv cc v data output low v ol i ol = ? 200a, i/o = 0v 0.4 v data input current high i ih ? 20 20 a data input current low i il 1 ma data pull-up resistance r pu between data and dv cc 13 20 30 k ?
micrel inc. MIC4555 september 2011 5 m9999-092311-b electrical characteristics ? sim power supply and leve l translator (continued) t a = 25 o c, v bat = 4.3v, c vcc = 1f unless bold values indicate ? 40 c t j 125 c. parameter symbol condition min. typ. max. unit 3.0v output @ 50ma and 1ma 2.7 3 3.3 output voltage accuracy v acc 1.8v output @ 50ma and 1ma 1.62 1.8 2.0 v v cc turn-on time t on 60 s current limit (v cc ) i out 60 ma output high voltage v oh rst, clk i oh = 20a 0.8v cc v output low voltage v ol rst, clk i ol = ? 200a 0.4 v output high voltage v oh data = dv cc , i oh = 20a 0.8v cc v output low voltage v ol data = 0v, i ol = ? 1ma 0.4 v i/o pull-up resistance r pu between i/o and v cc 6.5 10 14 k ? clk rise/fall time t r/f c clk, c i/o = 30pf (20 ? 80%) 18 ns rst, i/o rise/fall time t r/f c rst, c i/o = 30pf (20 ? 80%) 20 ns maximum clk frequency f clkmax 5 mhz notes: 1. exceeding the absolute maximum rating may damage the device. 2. exceeding the maximum differential input voltage will damage t he input stage and degrade performance (input bias current is likely to increase). 3. devices are esd sensitive. handling pr ecautions recommended. human body model, 1.5k ? in series with 100pf. 4. the device is not guaranteed to function outside its operating rating. 5. specification for packaged product only.
micrel inc. MIC4555 september 2011 6 m9999-092311-b typical characteristics input voltage v bat vs. output voltage v cc 1.780 1.785 1.790 1.795 1.800 1.805 1.810 1.815 1.820 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 input voltage (v) output voltage (v) dv cc = v bat v sel = 0v v cc_nom = 1.8v c out = 1f i out = 1ma i out = 50ma i out = 25ma input voltage v bat vs. output voltage v cc 2.96 2.97 2.98 2.99 3.00 3.01 3.02 3.03 3.04 3 3.5 4 4.5 5 5.5 input voltage (v) output voltage (v) dv cc = v sel = v bat v cc_nom = 3.0v c out = 1f i out = 1ma i out = 50ma i out = 25ma output voltage v cc vs. output current 1.70 1.72 1.74 1.76 1.78 1.80 1.82 1.84 1.86 1.88 1.90 0 5 10 15 20 25 30 35 40 45 50 output current (ma) output voltage (v) dv cc = 5v v out_nom = 1.8v output voltage v cc vs. output current 2.90 2.92 2.94 2.96 2.98 3.00 3.02 3.04 3.06 3.08 3.10 0 5 10 15 20 25 30 35 40 45 50 output current (ma) output voltage (v) dv cc = 5v v out_nom = 3.0v output voltage v cc vs. temperature 1.70 1.72 1.74 1.76 1.78 1.80 1.82 1.84 1.86 1.88 1.90 -40 -20 0 20 40 60 80 100 120 temperature (c) output voltage (v) v bat = dv cc = 5v v cc_nom = 1.8v v sel = 0v i out = 10ma output voltage v cc vs. temperature 2.90 2.92 2.94 2.96 2.98 3.00 3.02 3.04 3.06 3.08 3.10 -40 -20 0 20 40 60 80 100 120 temperature (c) output voltage (v) v bat = dv cc = 5v v cc_nom = 3.0v v sel = 5v i out = 10ma quiescent current vs. input voltage v bat 20 30 40 50 60 70 80 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 input voltage (v) quiescent current (a) v cc = 3.0v v cc = 1.8v quiescent current vs. temperature 20 30 40 50 60 70 80 -40 -20 0 20 40 60 80 100 120 temperature (c) quiescent current (a) v cc = 3.0v v cc = 1.8v dv cc = 5.0v current limit v cc vs. input voltage v bat 0 20 40 60 80 100 120 140 160 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 input voltage (v) current limit (ma) dv cc = v bat v sel = 0v v cc = 1.8v c out = 1f
micrel inc. MIC4555 september 2011 7 m9999-092311-b typical characteristics (continued) current limit v cc vs. temperature 0 20 40 60 80 100 120 140 160 180 200 -40 -20 0 20 40 60 80 100 120 temperature (c) current limit (ma) v bat = dv cc = 5v v sel = 0v v cc_nom = 1.8v ldo dropout vs. temperature 0 10 20 30 40 50 60 70 80 90 100 -40 -20 0 20 40 60 80 100 120 temperature (c) dropout voltage (mv ) v cc = 3.0v c out = 1f i out = 50ma ldo dropout vs. output current 0 10 20 30 40 50 60 70 0 5 10 15 20 25 30 35 40 45 50 output current (ma) dropout voltage (mv) c out = 1f v cc = 3v ldo psrr -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1000 10000 100000 1000000 frequency (hz) psrr (db) v bat = dv cc = 4.3v c out = 1f load = 35 ? v cc = 1.8v v cc = 3v ldo output noise spectral density 0.001 0.01 0.1 1 10 10 100 1,000 10,000 100,000 frequency (hz) noise (v/ hz) v bat = dv cc = 4.3v load = 36 ? c out = 1f noise (10hz- 100khz) = 55.2vrms
micrel inc. MIC4555 september 2011 8 m9999-092311-b functional characteristics
micrel inc. MIC4555 september 2011 9 m9999-092311-b functional characteristics (continued)
micrel inc. MIC4555 september 2011 10 m9999-092311-b functional characteristics (continued)
micrel inc. MIC4555 september 2011 11 m9999-092311-b functional diagram figure 1 . MIC4555 functional block diagram
micrel inc. MIC4555 september 2011 12 m9999-092311-b functional description en the en pin is the enable input from the controller. a logic high signal enables the level shifters and the v cc output. a logic low signal disables the level shifters and the ldo and a low current shutdown mode is activated. v sel v sel selects the level shifted voltage for the sim card. a high logic voltage on v sel selects the level shifter to 3v. a low logic voltage on v sel selects the level shifter to 1.8v. do not leave floating. dv cc the dv cc is the supply voltage for the controller side input and output pins (cin, rin, data). the operating range is from 1.6v to v bat . a minimum 1f input capacitor with a minimum voltage rating of 6.3v placed close to dv cc and ground (gnd) is required. refer to the layout recommendations for details. v bat the v bat is the input power supply to the ldo. the operating range is from 2.7v to 5.5v. a minimum 1f input capacitor with a minimum voltage rating of 6.3v to ground (gnd) is required. refer to the layout recommendations for details. v cc the v cc is the output of the ldo and provides power to the sim card. a minimum 1f input capacitor with a minimum voltage rating of 6.3v to ground (gnd) is required. refer to the layout recommendations for details. gnd the ground pin (gnd) is the ground path for the biasing, the control circuitry and the power ground. the current loop for the ground should be kept as short as possible. refer to the layout recommendations for more details. rin, rst rin is the digital reset input for the sim card and translates to rst through the di gital level shifter. it is one directional. if v sel is low, then the input at rin will be level shifted to 1.8v at the rst output. if v sel is high, then the input at rst will be level shifted to 3v at the rst output. cin, clk cin is the digital input clock for sim card. the cin translates to clk and is one directional. if v sel is low, then the input at clkin will be level shifted to 1.8v at the clk output. if v sel is high, then the input at cin will be level shifted to 3v at the clk output. data, i/o data is the digital data for the sim card. the data translate to i/o through the digital level shifter and is bidirectional using internal pull ups. if v sel is low, then the level shifted output is 1.8v at the i/o output. if v sel is high, then the level shifted output is 3v at the i/o output. since data and i/o are bidirectional, the input at i/o is level shifted to equal the dv cc voltage at the data output.
micrel inc. MIC4555 september 2011 13 m9999-092311-b application information the MIC4555 is a digital level shifter with a 50ma ldo for sim card interfaces. there are three high-speed level shifters that can convert input voltages from the controller and then level shift it to either 1.8v or 3.0v for the sim card. a voltage select pin (v sel ) selects the output voltage. the MIC4555 also has a 50ma ldo that can be used to power the sim card. as the MIC4555 is a cmos device, the ground current is typically <100a over the load range, the power dissipation contributed by t he ground current is < 1% and may be ignored for this particular calculation. example: v bat = 3.6v input capacitor v cc = 1.8v an input capacitor of 1f is required from the v bat to ground to provide stability. low-esr cerami c capacitors provide optimal performance with minimum board area. additional high-frequency capacitors, such as small valued npo dielectric type capacitors, help filter out high-frequency noise and are good practice in any rf- based circuit. x5r or x7r dielectrics are recommended for the input capacitor. y5v dielectrics lose most of their capacitance over temperat ure and are therefore, not recommended. i out = 50ma p d = (3.6v ? 1.8v)50ma p d = 0.09w to determine the maximum operating ambient temperature of the package, use the junction to ambient thermal resistance of the device and the following basic equation: output capacitor ? ? ? ? ? ? ? ? ? = ja a j(max) d(max) tt p the MIC4555 requires an output capacitor of 1f or greater for v cc to maintain stability. the design is optimized for use with low-esr ceramic-chip capacitors. high-esr capacitors are not recommended because they may cause high-frequen cy oscillation. the output capacitor can be increased, but performance has been optimized for a 1f ceramic output capacitor and does not improve significantly with larger capacitance. t j(max) = 125c, the maximum junction temperature of the die, and ja thermal resistance = 59c/w for the thin mlf ? package. substituting p d for p d(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. x7r/x5r dielectric type ceramic capacitors are recommended because of their temperature performance. x7r-type capacitors change capacitance by 15% over their operat ing temperature range and are the most stable type of ceramic capacitors. z5u and y5v dielectric capacitors change value by as much as 50% and 60%, respectively, over their operating temperature ranges. to use a ceramic-chip capacitor with y5v dielectric, the value must be much higher than an x7r ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. the maximum power dissipation must not be exceeded for proper operation. for example, when operating the MIC4555ymt at an input voltage of 3.6v and 50ma load with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as follows: 0.09w = (125c ? t a )/(59c/w) t a = 119.69c thermal considerations the MIC4555 is designed to provide output current up to 50ma. the maximum ambient operating temperature can be calculated based upon the output current and the voltage drop across the part. for example if the input voltage (v bat ) is 3.6v and the output voltage (v cc ) is 1.8v at 50ma, the power di ssipation of the regulator circuit can be determined using the equation: therefore, the maximum ambient operating temperature of 119.69c is allowed in a 3mm x 3mm thin mlf ? package. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to the ?regulator thermals? section of micrel?s designing with low dropout voltage regulators handbook. this information can be found on micrel's website at: http://www.micrel.com/_pdf/other/ldobk_ds.pdf p d = (v bat ? v cc ) i out + v bat i gnd
micrel inc. MIC4555 september 2011 14 m9999-092311-b typical application circuit bill of materials item part number manufacturer description qty. c1, c2, c3 c1608x7r1h105k tdk (1) ceramic capacitor, 1f, 6.3v, x7r, size 0603 3 u1 MIC4555yml micrel, inc. (2) sim card level shifter with 50ma ldo 1 notes: 1. tdk: www.tdk.com . 2. micrel, inc.: www.micrel.com .
micrel inc. MIC4555 september 2011 15 m9999-092311-b layout recommendations top layer bottom layer
micrel inc. MIC4555 september 2011 16 m9999-092311-b package information 16-pin (3mm x 3mm) mlf ? (ml) micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http://www.micrel.com micrel makes no representations or warranties with respect to t he accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for it s use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether expre ss, implied, arising by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrel?s terms and conditions of sale for such products, mi crel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including l iability or warranties relating to fitness for a particular purpose, merchantability, or infringement of an y patent, copyright or other intellectual p roperty right. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in pers onal injury. life support devices or system s are devices or systems that (a) are in tended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchaser?s own risk a nd purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2010 micrel, incorporated.

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