MIC4555 SIM Card Level Shifter with 50mA LDO General Description Features 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 −40°C to +125°C junction temperature. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. • • • • • • • 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 −40°C to +125°C junction temperature range Applications • SIM card interface for 3G/4G systems • Wireless PC cards • Smart card readers ____________________________________________________________________________________________________________ Typical Application Typical SIM/SMART CARD Interface MLF and MicroLead 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 September 2011 M9999-092311-B Micrel Inc. MIC4555 Ordering Information Part Number Marking Code LDO Output Voltage Junction Temperature Range Package MIC4555YML 4555 1.8V/3.0V –40°C to +125°C 3mm x 3mm 16-Pin MLF® Pin Configuration 3mm x 3mm MLF® (Top View) Pin Description Pin Number Pin Name 1 EN Enable input from controller. This pin should be high (DVCC) for normal operation and low (<0.4V) to activate a low-current shutdown mode. 2 VSEL VCC voltage select input from the controller. A low level selects VCC = 1.8V while driving this pin to DVCC selects VCC = 3V. 3 DVCC Supply Voltage for the Controller Side I/O Pins (CIN, RIN, DATA). When below 1.1V typical, the VCC supply is disabled. This pin should be bypassed with a 1μF ceramic capacitor close to the pin. 4 N/C Not Connected. 5 VBAT SIM LDO supply input. This pin can function between 2.7V and 5.5V for normal operation. This pin should be bypassed with a 1μF ceramic capacitor close to the pin. 6 N/C Not Connected 7 VCC SIM LDO output provides SIM card VCC supply. A 1μF low-ESR capacitor should be connected close to the VCC 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 driver 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 CIN Clock input from the controller. September 2011 Description 2 M9999-092311-B Micrel Inc. MIC4555 Pin Description (Continued) Pin Number Pin Name 14 RIN 15 DATA 16 N/C ePad HS Pad September 2011 Description Reset input from the controller. Controller side data I/O. This pin is used for bidirectional data transfer. The controller output must be an open-drain configuration. The open drain output must be capable of sinking greater than 1mA. Not Connected Heat sink pad. Connect to GND. 3 M9999-092311-B Micrel Inc. MIC4555 Absolute Maximum Ratings(1) Operating Ratings(4) Supply Voltages (DVCC, VBAT, VCC, VSEL).........−0.3 to +6.0V Input Logic (RIN, CIN, DATA)(2) .........................−0.3 to +6.0V Lead Temperature (soldering, 5s).............................. 260°C Storage Temperature (TS)............................. −65 to +150°C ESD Rating(3) ................................................ 2kV to Any Pin ESD Rating (RST, CLK, I/O, VCC pins)(3) ........... 8kV to GND Supply Voltage (VBAT)................................... +2.7V to +5.5V Supply Voltage (DVCC) ....................................+1.6V to VBAT Logic Inputs (RIN, CIN, DATA)............................. 0V to DVCC Logic Inputs (EN, VSEL).........................................0V to VBAT Storage Temperature (TS)............................. −45 to +125°C Package Thermal Resistance 3mm x 3mm MLF® -16L (θJA) .............................59°C/W Electrical Characteristics − General TA =25oC, VBAT = 4.3V, CVCC = 1µF unless otherwise noted. Bold values indicate −40°C ≤ TJ ≤ 125°C. Parameter Symbol Typ. Max. Unit VEN = 0V, All outputs disabled Condition Min. 0.1 1 µA VCC = 1.8V, ICC = 0mA 41 80 VCC = 3.0V, ICC = 0mA 47 80 VEN = 0V, All outputs disabled 0.1 1 fCLK = 1MHz, tr/f = 10ns, DVCC = 5.5V 3.5 VBAT Shutdown Current ISD VBAT Operating Current IOPBAT DVCC Shutdown Current ISD DVCC Operating Current IOPDVcc DVCC Undervoltage Lock-Out Threshold (UVLO) VUVLO Over-Temperature Shutdown Threshold Tth 150 °C Over-Temperature Hysteresis Thys 10 °C (5) Auto Discharge NFET Resistance RPD 0.8 1.1 When disabled, IOUT = 3mA. Active pulldown on VCC. 260 When disabled, IOUT = 3mA. Active pulldown on RST, CLK. 100 µA µA µA 1.4 V Ω Electrical Characteristics − SIM Power Supply and Level Translator TA = 25oC, VBAT = 4.3V, CVCC = 1µF unless Bold values indicate −40°C ≤ TJ ≤ 125°C. Parameter Symbol Condition Min. EN, VSEL High Input Threshold VIH EN, VSEL Low Input Threshold VIL 0.4 DVCC 1.6 Controller Voltage Input RIN, CIN High Input Threshold VIH RIN, CIN Low Input Threshold VIL DATA Output High VOH IOH = 20µA, I/0 = VCC DATA Output Low VOL IOL = −200µA, I/O = 0V DATA Input Current High IIH DATA Input Current Low IIL DATA Pull-Up Resistance RPU September 2011 Typ. 4 Unit 1.2 V V VBAT V 0.7DVCC V 0.2DVCC V 0.7DVCC V −20 Between DATA and DVCC Max. 13 20 0.4 V 20 µA 1 mA 30 kΩ M9999-092311-B Micrel Inc. MIC4555 Electrical Characteristics − SIM Power Supply and Level Translator (Continued) TA = 25oC, VBAT = 4.3V, CVCC = 1µF unless Bold values indicate −40°C ≤ TJ ≤ 125°C. Parameter Output Voltage Accuracy Symbol VACC Condition Min. Typ. Max. 3.0V Output @ 50mA and 1mA 2.7 3 3.3 1.8V Output @ 50mA and 1mA 1.62 1.8 2.0 VCC Turn-On Time ton Current Limit (VCC) IOUT Output High Voltage VOH RST, CLK IOH = 20µA Output Low Voltage VOL RST, CLK IOL = −200µA Output High Voltage VOH DATA = DVCC , IOH = 20µA Output Low Voltage VOL DATA = 0V, I/O Pull-Up Resistance RPU Between I/O and VCC CLK Rise/Fall Time RST, I/O Rise/Fall Time Maximum CLK Frequency 60 mA 0.8VCC V 0.4 0.8VCC CCLK, CI/O = 30pF (20 − 80%) tr/f CRST, CI/O = 30pF (20 − 80%) fCLKMAX 10 18 20 5 V V IOL = −1mA tr/f V µs 60 6.5 Unit 0.4 V 14 kΩ ns ns MHz Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. Exceeding the maximum differential input voltage will damage the input stage and degrade performance (input bias current is likely to increase). 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF. 4. The device is not guaranteed to function outside its operating rating. 5. Specification for packaged product only. September 2011 5 M9999-092311-B Micrel Inc. MIC4555 Typical Characteristics IOUT = 1mA 1.810 VCC_NOM = 1.8V 1.805 COUT = 1µF 1.800 1.795 1.790 1.785 IOUT = 25mA IOUT = 50mA 3.01 IOUT = 25mA 3.00 IOUT = 50mA 2.99 DV CC = VSEL = VBAT 2.98 VCC_NOM = 3.0V COUT = 1µF 2.96 3.5 3.9 4.3 4.7 5.1 3.5 4 5 INPUT VOLTAGE (V) Output Voltage VCC vs. Output Current Output Voltage VCC vs. Temperature 1.90 3.08 1.88 3.06 1.86 3.04 3.02 3.00 2.98 2.96 2.94 DVCC = 5V 2.92 VOUT_NOM = 3.0V 2.90 1.82 1.80 1.78 1.76 VBAT = DVCC = 5V 1.74 VCC_NOM = 1.8V 1.72 VSEL = 0V QUIESCENT CURRENT (µA) 40 VCC = 1.8V 20 40 60 80 3.9 4.3 4.7 INPUT VOLTAGE (V) September 2011 5.1 5 10 5.5 15 20 25 30 35 40 45 50 Output Voltage VCC vs. Temperature 3.06 IOUT = 10mA 3.04 3.02 3.00 2.98 2.96 VBAT = DVCC = 5V 2.94 VCC_NOM = 3.0V 2.92 VSEL = 5V 100 120 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) Current Limit VCC vs. Input Voltage VBAT 160 DVCC = 5.0V 140 70 VCC = 3.0V 60 50 40 VCC = 1.8V 30 120 100 80 DVCC = VBAT 60 VSEL = 0V VCC = 1.8V 40 COUT = 1µF 20 20 20 3.5 VOUT_NOM = 1.8V 2.90 0 80 50 3.1 DVCC = 5V 1.72 Quiescent Current vs. Temperature VCC = 3.0V 2.7 1.74 TEMPERATURE (°C) 70 30 1.76 3.08 IOUT = 10mA -40 -20 Quiescent Current vs. Input Voltage VBAT 60 1.78 3.10 OUTPUT CURRENT (mA) 80 1.80 OUTPUT CURRENT (mA) 1.84 10 15 20 25 30 35 40 45 50 1.82 0 CURRENT LIMIT (mA) 5 1.84 5.5 1.70 0 QUIESCENT CURRENT (µA) 4.5 INPUT VOLTAGE (V) 3.10 1.86 1.70 3 5.5 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 3.1 3.02 2.97 1.780 2.7 OUTPUT VOLTAGE (V) VSEL = 0V IOUT = 1mA 1.88 3.03 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.815 1.90 3.04 DVCC = VBAT OUTPUT VOLTAGE (V) 1.820 Output Voltage VCC vs. Output Current Input Voltage VBAT vs. Output Voltage VCC Input Voltage VBAT vs. Output Voltage VCC -40 0 -20 0 20 40 60 80 TEMPERATURE (°C) 6 100 120 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 INPUT VOLTAGE (V) M9999-092311-B Micrel Inc. MIC4555 Typical Characteristics (Continued) 200 100 90 DROPOUT VOLTAGE (mV) 180 CURRENT LIMIT (mA) LDO Dropout vs. Temperature 160 140 120 100 80 VBAT = DVCC = 5V 60 VSEL = 0V IOUT = 50mA 80 70 60 50 40 30 20 VCC = 3.0V 20 10 COUT = 1µF 0 0 40 VCC_NOM = 1.8V -40 -20 0 20 40 60 80 100 120 60 50 VCC = 3V 40 30 20 10 COUT = 1µF 0 -40 -20 TEMPERATURE (°C) 0 20 40 60 80 100 120 0 5 10 15 20 25 30 35 40 45 50 OUTPUT CURRENT (mA) TEMPERATURE (°C) LDO PSRR LDO Output Noise Spectral Density -120 10 -110 Noise (10Hz- 100kHz) = 55.2µVrms -100 V CC = 3V NOISE (µV/√Hz) -90 PSRR (dB) LDO Dropout vs. Output Current 70 DROPOUT VOLTAGE (mV) Current Limit VCC vs. Temperature -80 -70 -60 -50 -40 VBAT = DVCC = 4.3V -30 COUT = 1µF Load = 35Ω -20 -10 1 0.1 0.01 V CC = 1.8V VBAT = DVCC = 4.3V Load = 36Ω COUT = 1µF 0.001 0 10 100 1000 10000 FREQUENCY (Hz) September 2011 100000 1000000 10 100 1,000 10,000 100,000 FREQUENCY (Hz) 7 M9999-092311-B Micrel Inc. MIC4555 Functional Characteristics September 2011 8 M9999-092311-B Micrel Inc. MIC4555 Functional Characteristics (Continued) September 2011 9 M9999-092311-B Micrel Inc. MIC4555 Functional Characteristics (Continued) September 2011 10 M9999-092311-B Micrel Inc. MIC4555 Functional Diagram Figure 1. MIC4555 Functional Block Diagram September 2011 11 M9999-092311-B Micrel Inc. MIC4555 Functional Description RIN, RST RIN is the digital reset input for the SIM Card and translates to RST through the digital level shifter. It is one directional. If VSEL is low, then the input at RIN will be level shifted to 1.8V at the RST output. If VSEL is high, then the input at RST will be level shifted to 3V at the RST output. EN The EN pin is the enable input from the controller. A logic high signal enables the level shifters and the VCC output. A logic low signal disables the level shifters and the LDO and a low current shutdown mode is activated. VSEL VSEL selects the level shifted voltage for the SIM Card. A high logic voltage on VSEL selects the level shifter to 3V. A low logic voltage on VSEL selects the level shifter to 1.8V. Do not leave floating. CIN, CLK CIN is the digital input clock for SIM card. The CIN translates to CLK and is one directional. If VSEL is low, then the input at CLKIN will be level shifted to 1.8V at the CLK output. If VSEL is high, then the input at CIN will be level shifted to 3V at the CLK output. DVCC The DVCC is the supply voltage for the controller side input and output pins (CIN, RIN, DATA). The operating range is from 1.6V to VBAT. A minimum 1µF input capacitor with a minimum voltage rating of 6.3V placed close to DVCC and ground (GND) is required. Refer to the Layout Recommendations for details. 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 VSEL is low, then the level shifted output is 1.8V at the I/O output. If VSEL 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 DVCC voltage at the DATA output. VBAT The VBAT is the input power supply to the LDO. The operating range is from 2.7V to 5.5V. A minimum 1µF input capacitor with a minimum voltage rating of 6.3V to ground (GND) is required. Refer to the Layout Recommendations for details. VCC The VCC is the output of the LDO and provides power to the SIM card. A minimum 1µF 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. September 2011 12 M9999-092311-B Micrel Inc. MIC4555 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 (VSEL) 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 <100µA over the load range, the power dissipation contributed by the ground current is < 1% and may be ignored for this particular calculation. Example: VBAT = 3.6V VCC = 1.8V IOUT = 50mA PD = (3.6V – 1.8V)50mA Input Capacitor An input capacitor of 1µF is required from the VBAT to ground to provide stability. Low-ESR ceramic 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 RFbased circuit. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. PD = 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 The MIC4555 requires an output capacitor of 1µF or greater for VCC 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-frequency oscillation. The output capacitor can be increased, but performance has been optimized for a 1µF ceramic output capacitor and does not improve significantly with larger capacitance. X7R/X5R dielectric type ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by 15% over their operating 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. 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 (VBAT) is 3.6V and the output voltage (VCC) is 1.8V at 50mA, the power dissipation of the regulator circuit can be determined using the equation: ⎛ TJ(max) − TA PD(max) = ⎜⎜ θ JA ⎝ TJ(max) = 125°C, the maximum junction temperature of the die, and θJA thermal resistance = 59°C/W for the Thin MLF® package. Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. 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 TA can be determined as follows: 0.09W = (125°C – TA)/(59°C/W) TA = 119.69°C Therefore, the maximum ambient operating temperature of 119.69°C 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 PD = (VBAT – VCC) I OUT + VBAT IGND September 2011 ⎞ ⎟ ⎟ ⎠ 13 M9999-092311-B Micrel Inc. MIC4555 Typical Application Circuit Bill of Materials Item C1, C2, C3 U1 Part Number C1608X7R1H105K MIC4555YML Manufacturer (1) TDK Micrel, Inc. (2) Description Qty. Ceramic Capacitor, 1µF, 6.3V, X7R, Size 0603 3 SIM Card Level Shifter with 50mA LDO 1 Notes: 1. TDK: www.tdk.com. 2. Micrel, Inc.: www.micrel.com. September 2011 14 M9999-092311-B Micrel Inc. MIC4555 Layout Recommendations Top Layer Bottom Layer September 2011 15 M9999-092311-B Micrel Inc. MIC4555 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 the 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 its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended 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 Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2010 Micrel, Incorporated. September 2011 16 M9999-092311-B