LXDC2UR series Micro DC-DC converter 1. Features 2 Low EMI noise and small footprint (5.75mm ) using inductor-embedded ferrite substrate Up to 90% high efficiency using synchronous rectifier technology at 6MHz operation PFM/PWM automatic mode switching function for high efficiency operation over full current range PWM forced mode for low ripple noise operation Wide input voltage range : 2.7~5.5V Maximum Load Current: 600mA. Fixed output voltage: 1.2V, 1.5V, 1.8V, 3.0V, 3.3V Internal soft start, 120 μs start-up time Current over load and thermal shutdown protection 2. Description The LXDC2UR series is a low power step-down DC-DC converter, which is suitable for a space-limited or a noise-sensitive application. The device utilizes an inductor-embedded ferrite substrate, and the substrate eliminates radiated EMI noise and conduction noise efficiently. By just putting this device, it can be used as a high performance LDO replacement. Its low noise feature and easy to assembly feature assures reliable power supply quality. The device works in PFM mode at light load and it extends the battery life by reducing quiescent current. At heavy load, its control mode changes to PWM mode automatically and it keeps high efficiency using synchronous rectifying technology. If only heavy load current operation is needed, PWM forced mode is available. In PWM forced mode, ripple noise is reduced. In shutdown mode, the current consumption is up to 1uA. 3. Typical Application Circuit LCDC2UR VBAT Vin Vout Output Voltage (1.2, 1.5, 1.8, 3.0, 3.3V/ up to 600mA) Enable EN Mode Operation mode select GND 1 February 2016 LXDC2UR series Micro DC-DC converter 4. Mechanical details 4-1 Outline TOP VIEW BOTTOM VIEW IC Capacitor a (C0.15) W e L SIDE VIEW e 1 2 3 8 9 4 7 6 5 c b d d c Substrate T Unit: mm Mark Dimension L 2.5 +/- 0.2 W 2.3 +/- 0.2 T 1.2 MAX a 0.45 +/- 0.1 b 0.35 +/- 0.1 c 0.325 +/- 0.1 d 0.375 +/- 0.1 e 0.25 +/- 0.2 2 February 2016 LXDC2UR series Micro DC-DC converter 4-2. Pin Function Pin Symbol I/O 1 Mode Input 2,6,9 GND - 3,4 Vout Output 5 EN Description This is the operation mode select pin. This pin must not be left floating and must be terminated. Mode=H: Low-noise mode enabled, fixed frequency PWM operation is forced. Mode=L: This device is operating in pulse frequency modulation mode (PFM) at light load currents, and in regulated frequency pulse width mode (PWM) at high-load currents. Ground pin Input Regulated voltage output pin. Apply output load between this pin and GND. This is the ON/OFF control pin of the device. Connecting this pin to GND keeps the device in shutdown mode. Pulling this pin to Vin enables the device with soft start. This pin must not be left floating and must be terminated. EN=H: Device ON, 7,8 Vin Input EN=L: Device OFF Vin pin supplies current to the LXDC2UR internal regulator. 4-3. Functional Block Diagram EN Mode Vin Current Sense UVLO Clock Soft Start Switching Controller Cin OCP EA Thermal Shutdown Embedded L Gate Driver Vout Cout Control IC LXDC2UR GND 3 February 2016 LXDC2UR series Micro DC-DC converter 5. Ordering Information Part number Output Voltage Device Specific Feature MOQ LXDC2UR12A-118 1.2V Standard Type T/R, 3000pcs/R LXDC2UR15A-119 1.5V Standard Type T/R, 3000pcs/R LXDC2UR18A-120 1.8V Standard Type T/R, 3000pcs/R LXDC2UR30A-143 3.0V Standard Type T/R, 3000pcs/R LXDC2UR33A-122 3.3V Standard Type T/R, 3000pcs/R 6. Electrical Specification 6-1 Absolute maximum ratings Parameter Input voltage Operating temperature Operating IC temperature Storage temperature symbol rating Unit Vin, EN, Mode 6.3 V Ta -40 to +85 o -40 to +125 o -40 to +85 o TIC TSTO C C C 4 February 2016 LXDC2UR series Micro DC-DC converter 6-2 Electrical characteristics (Ta=25℃) Parameter Symbol Input voltage Vin UVLO voltage UVLO Input leak current lin-off Operating quiescent current Iin-on Condition Min. Typ. Max. Vout ≦1.8V 2.7 - 5.5 Vout ≧3.0V 3.6 - 5.5 - 2.05 2.1 V - 0.1 2 uA - 37 60 Vin=3.6V, EN=Mode=0V Vin=EN=3.6V, Mode=0V Output voltage accuracy Load current range Vout Vin-Vout>0.6V Vrpl uA LXDC2UR30A-143 - 60 80 LXDC2UR12A-118 1.176 1.20 1.224 LXDC2UR15A-119 1.47 1.50 1.53 LXDC2UR18A-120 1.764 1.80 1.836 LXDC2UR30A-143 2.94 3.00 3.06 LXDC2UR33A-122 3.234 3.30 3.366 LXDC2UR33A-122 0 Iout=300mA, Ripple voltage LXDC2UR15A-119 Iout Vin=3.6V, BW=100MHz V LXDC2UR12A-118 LXDC2UR18A-120 Vin=EN=5.0V Mode=0V Unit 600 V mA LXDC2UR12A-118 LXDC2UR15A-119 LXDC2UR18A-120 LXDC2UR30A-143 - 15 mV Vin=5.0V, Iout=300mA, LXDC2UR33A-122 BW=100MHz Efficiency EFF Vin=3.6V, Iout=300mA Vin=5.0V, Iout=300A LXDC2UR12A-118 82 - LXDC2UR15A-119 85 - LXDC2UR18A-120 86 - LXDC2UR30A-143 93 - LXDC2UR33A-122 91 - % 5 February 2016 LXDC2UR series Micro DC-DC converter Parameter EN control voltage Mode control voltage SW Frequency Symbol Condition VENH ON; Enable VENL OFF; Disable VMODH High; PWM forced mode VMODL Low; Automatic PFM/PWM mode Fosc Iout=300mA, PWM mode Min. Typ. Max. 1.4 - Vin 0 - 0.4 1.4 - Vin 0 - 0.4 5.0 6.0 7.0 Unit V V MHz LXDC2UR12A-118 15 LXDC2UR15A-119 Discharge resistor Rds Ω LXDC2UR18A-120 LXDC2UR30A-143 110 LXDC2UR33A-122 LXDC2UR12A-118 Over current protection LXDC2UR15A-119 OCP 900 1200 mA LXDC2UR18A-120 LXDC2UR30A-143 LXDC2UR33A-122 Start-up time 600 Ton 600 1200 120 1800 μs (*)The above characteristics are tested using the test circuit on section 8. 6 February 2016 LXDC2UR series Micro DC-DC converter 6-3 Thermal and Current De-rating Information The following figure shows the power dissipation and temperature rise characteristics example. These data are measured on Murata’s evaluation board of this device at no air-flow condition. Loss-ΔT Characteristics (Vin=3.6V, Vo=1.8V) Io - Loss Characteristics (Vin=3.6V, Vo=1.8V) 35 30 200 25 150 ΔT [℃ ] Power dissipation [mW] 250 100 20 15 10 50 5 0 0 0 100 200 300 400 500 600 0 Io [mA] 50 100 150 200 250 Power dissipation [mW] The output current of the device may need to be de-rated if it is operated in a high ambient temperature or in a continuous power delivering application. The amount of current de-rating is highly dependent on the environmental thermal conditions, i.e. PCB design, nearby components or effective air flows. Care should o especially be taken in applications where the device temperature exceeds 85 C. o The IC temperature of the device must be kept lower than the maximum rating of 125 C. It is generally recommended to take an appropriate de-rating to IC temperature for a reliable operation. A general de-rating for the temperature of semiconductor is 80%. MLCC capacitor’s reliability and lifetime are also depending on temperature and applied voltage stress. Higher temperature and/or higher voltage cause shorter lifetime of MLCC, and the degradation can be described by the Arrhenius model. The most critical parameter of the degradation is IR (Insulation Resistance). The below figure shows MLCC’s B1 life based on a failure rate reaching 1%. It should be noted that wear-out mechanisms in MLCC capacitor is not reversible but cumulative over time. 7 February 2016 LXDC2UR series Micro DC-DC converter Capacitor B1 Life(Thousand Hours) ● LXDC2UR12A-118, LXDC2UR15A-119, LXDC2UR18A-120 Capacitor Case temperature(℃) ● LXDC2UR30A-143 8 February 2016 LXDC2UR series Micro DC-DC converter ●LXDC2UR33A-122 Capacitor B1 Life vs Capacitor Case temperature Capacitor B1 B1 Life(Thousand Hours) Capacitor Life (Tousand Hours) 100000 Vin=5V 10000 1000 100 10 1 20 40 60 80 100 120 Capacitor Case temperature(℃) Temprature (oC ) Capacitor Case The following steps should be taken before the design fix of user’s set for a reliable operation. o 1. The ambient temperature of the device should be kept below 85 C 2. The IC temperature should be measured on the worst condition of each application. The temperature must be o kept below 125 C. An appropriate de-rating of temperature and/or output current should be taken. 3. The MLCC temperature should be measured on the worst condition of each application. Considering the above figure, it should be checked if the expected B1 life of MLCC is acceptable or not. 9 February 2016 LXDC2UR series Micro DC-DC converter 7. Detailed Description Mode selection The MODE pin allows selecting the operating mode. If the MODE pin is pulled to logic low voltage (VMODL), the converter operates automatic PFM and PWM mode. In this mode, the converter operates PFM mode at light load current, and when the load current increase, the operating mode will change to PWM mode automatically. In this mode, the converter can work in high efficiency over wide load current range. The transition current between PFM and PWM is depend on Vin, Vout and other factors, but the ballpark threshold is about 70-150mA If the MODE pin is pulled to logic high voltage (VMODH), the device operates in PWM forced mode. In this mode, the converter operates in PWM mode even at light load current. The advantage of this mode is that the converter operates with a fixed frequency that allows simple filtering of switching frequency. In this mode, the efficiency is lower compared to the PFM mode at light load current. PFM mode at light load PWM mode at heavy load Nominal output voltage UVLO (Under Voltage Lock Out) The input voltage (Vin) must reach or exceed the UVLO voltage (2.05Vtyp) before the device begins the start up sequence even when EN pin is kept high. UVLO function keeps away of an unstable operation at low Vin range Soft Start The device has an internal soft-start function that limits the inrush current during start-up. The soft-start system progressively increases the switching on-time from a minimum pulse-width to that of normal operation. Because of the function, the output voltage increases gradually from zero to nominal voltage at start-up event. The nominal soft-start time is 120 μsec. Enable The device starts operation when EN is set high and starts up with soft start. For proper operation, the EN pin must be terminated to logic high and must not left floating. Pulling the EN pin to logic low forces the device shutdown. The shutdown quiescent current is 0.1 μA (typ). Discharge Function LXDC2UR series can actively discharge the internal output capacitor (Cout) when it turns off. The discharge time depends on external output capacitance. LXDC2UR series do not need external capacitors, but if you use external output capacitor its discharge time will become longer. Over Current Protection LXDC2UR series integrates a current limit function to protect internal components against heavy load or short circuits. When over current event is removed, the device returns to the normal operation automatically. Thermal Shutdown o As soon as the internal IC’s junction temperature exceeds 140 C (typ), the device goes into thermal shutdown. The device returns to its normal operation when the Internal IC’s junction temperature again falls below o 130 C(typ). 10 February 2016 LXDC2UR series Micro DC-DC converter 8. Test Circuit 11 February 2016 LXDC2UR series Micro DC-DC converter 9.Reliability Tests No. 1 2 3 Items Vibration Resistance Result (NG) 18 G (0) Frequency : 10~2000 Hz 2 Acceleration : 196 m/s Direction : X,Y,Z 3 axis Period : 2 h on each direction Total 6 h. Solder specimens on the testing jig (glass epoxy boards) shown in appended Fig.2 by a Pb free solder. The soldering shall be done either by iron or reflow and be conducted with care so that the soldering is uniform and free of defect such as by heat shock. Deflection : 1.6mm Solder specimens onto test jig shown below. Apply pushing force at 0.5mm/s until electrode pads are peeled off or ceramics are broken. Pushing force is applied to longitudinal direction. 18 G (0) Pushing Direction 18 G (0) 18 G (0) 18 G (0) Test Methods Appearance : No severe damages Solder specimens on the testing jig (glass fluorine boards) shown in appended Fig.1 by a Pb free solder. The soldering shall be done either by iron or reflow and be conducted with care so that the soldering is uniform and free of defect such as by heat shock. Deflection Soldering strength (Push Strength) QTY Specifications 9.8 N Minimum Specimen 4 5 Solderability of Termination Resistance to Soldering Heat (Reflow) 75% of the terminations is to be soldered evenly and continuously. Appearance No severe damages Electrical specifications Satisfy specifications listed in paragraph 6-2. Jig Immerse specimens first an ethanol solution of rosin, then in a Pb free solder solution for 3±0.5 sec. at 245±5 °C. Preheat : 150 °C, 60 sec. Solder Paste : Sn-3.0Ag-0.5Cu Flux : Solution of ethanol and rosin (25 % rosin in weight proportion) Preheat Temperature : 150-180 °C Preheat Period : 90+/-30 sec. High Temperature : 220 °C High Temp. Period : 20sec. Peak Temperature : 260+5/-0 °C Specimens are soldered twice with the above condition, and then kept in room condition for 24 h before measurements. 12 February 2016 LXDC2UR series Micro DC-DC converter No. 6 7 8 9 Items Specifications Test Methods High Temp. Exposure Temperature：85±2 ℃ Period：1000+48/-0 h Room Condition：2～24h Temperature Cycle Condition：100 cycles in the following table Humidity (Steady State) Appearance No severe damages Electrical specifications Satisfy specifications listed in paragraph 6-2. Low Temp. Exposure Step Temp(°C) Time(min) 1 Min. Operating Temp.+0/-3 30±3 2 Max. Operating Temp.+3/-0 30±3 Temperature：85±2 ℃ Humidity：80～90%RH Period：1000+48/-0 h Room Condition：2～24h Temperature：-40±2 ℃ Period：1000+48/-0 h Room Condition：2～24h QTY Result (NG) 18 G (0) 18 G (0) 18 G (0) 18 G (0) 10 ESD(Machine Model) C：200pF、R：0Ω TEST Voltage ：+/-100V Number of electric discharges：1 5 G (0) ESD(Human Body Model) C：100pF、R：1500Ω TEST Voltage ：+/-1000V Number of electric discharges：1 5 G (0) 11 13 February 2016 LXDC2UR series Micro DC-DC converter Fig.1 Land Pattern (C0.15) a b 3 2 1 4 9 8 5 6 7 c d d c Unit: mm Mark Dimension a 0.45 b 0.35 c 0.325 d 0.375 ・Reference purpose only. 14 February 2016 LXDC2UR series Micro DC-DC converter Fig.2 Testing board 100 Unit：mm 40 ■： Land pattern is same as figure1 Glass-fluorine board t＝1.6mm Copper thickness over 35 mm Mounted situation Unit：mm チップ Device 45 45 Test method Unit：mm 20 50 R230 deflection 15 February 2016 LXDC2UR series Micro DC-DC converter 10. Measurement Data Micro DC-DC Converter evaluation board (P2LX0006A) Measurement setup The enable switch has three states (ON, OFF and Open). 1. When it is toggled to “ON” side, the device starts operation. 2. When it is toggled to “OFF” side, the device stop operation and keep shut down status. 3. When it is set to open, the EN pin floats and an external voltage can be applied to the EN terminal pin on the EVB. If you don’t apply an external voltage to EN pin, the enable switch should not to be set to the middle position. The mode switch has three states (PWM, PFM/PWM and Open). 1. When it is toggled to “PWM” side, the device operates PWM forced mode. 2. When it is toggled to “PFM/PWM” side, the device operates PFM/PWM automatic mode. 3. When it is set to open, the mode pin floats and an external voltage can be applied to the Mode terminal pin on the EVB. If you don’t apply an external voltage to Mode pin, the mode switch should not to be set to the middle position. ※The 47uF capacitor is for the evaluation kit only, and has been added to compensate for the long test cables. 16 February 2016 LXDC2UR series Micro DC-DC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Efficiency ・Vin=3.6V, Vout=1.5V 90 90 85 85 80 80 EFF [%] EFF [%] ・Vin=3.6V, Vout=1.2V 75 75 70 70 65 65 60 60 1 10 100 1 1,000 10 ・Vin=3.6V, Vout=1.8V 1,000 100 1000 ・Vin=3.6V, Vout=3.0V 100 90 95 85 90 EFF [%] 80 EFF [%] 100 Iout [mA] Iout [mA] 75 70 85 80 75 70 65 65 60 60 1 10 100 1 1,000 10 Iout [mA] Iout [mA] ・Vin=5.0V, Vout=3.3V 100 95 EFF [%] 90 85 80 75 70 65 60 1 10 100 1,000 Iout [mA] 17 February 2016 LXDC2UR series Micro DC-DC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Load Regulation ・Vin=3.6V, Vout=1.5V 1.224 1.530 1.212 1.515 Vout [V] Vout [V] ・Vin=3.6V, Vout=1.2V 1.200 1.500 1.485 1.188 1.470 1.176 0 100 200 300 400 500 600 0 100 200 Iout [mA] ・Vin=3.6V, Vout=1.8V 400 500 600 400 500 600 ・Vin=3.6V, Vout=3.0V 1.836 3.06 1.818 3.03 Vout [V] Vout [V] 300 Iout [mA] 1.800 3 2.97 1.782 2.94 1.764 0 100 200 300 400 500 0 600 100 200 300 Iout [mA] Iout [mA] ・Vin=5.0V, Vout=3.3V 3.366 Vout [V] 3.333 3.300 3.267 3.234 0 100 200 300 400 500 600 Iout [mA] 18 February 2016 LXDC2UR series Micro DC-DC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Output Ripple-Noise ・Vin=3.6V, Vout=1.5V, BW : 150MHz 60 60 50 50 40 40 Vrpl [mVpp] Vrpl [mVpp] ・Vin=3.6V, Vout=1.2V , BW : 150MHz 30 20 30 20 10 10 0 0 0 100 200 300 400 500 0 600 100 200 ・Vin=3.6V, Vout=1.8V, BW : 150MHz 400 500 600 500 600 ・Vin=3.6V, Vout=3.0V, BW : 150MHz 60 60 50 50 40 40 Vrpl [mVpp] Vrpl [mVpp] 300 Iout [mA] Iout [mA] 30 20 30 20 10 10 0 0 0 100 200 300 400 500 0 600 100 200 300 400 Iout [mA] Iout [mA] ・Vin=5.0V, Vout=3.3V, BW : 150MHz 60 Vrpl [mVpp] 50 40 30 20 10 0 0 100 200 300 400 500 600 Iout [mA] 19 February 2016 LXDC2UR series Micro DC-DC converter Typical Measurement Data (reference purpose only) (Ta=25℃) Load Transient Response ・Vin=3.6V, Vout=1.2V, Mode : PFM/PWM 20mV/div 20mV -20mV ΔIo=600mA ・Vin=3.6V, Vout=1.2V, Mode : PWM forced 20mV/div 5mV -20mV ΔIo=600mA 20 February 2016 LXDC2UR series Micro DC-DC converter 11. Tape and Reel Packing 1）Dimensions of Tape (Plastic tape) Unit: mm Feeding direction 2） Dimensions of Reel Unit: mm 2±0.5 Φ60 Φ13±0.2 Φ180 (9.0) 13.0±1.4 21 February 2016 LXDC2UR series Micro DC-DC converter 3）Taping Diagrams [1] Feeding Hole : As specified in (1) [2] Hole for chip : As specified in (1) [3] Cover tape : 50um in thickness [4] Base tape : As specified in (1) [3] [1] [2] [3] [4] Feeding Hole Feeding Direction Chip 22 February 2016 LXDC2UR series Micro DC-DC converter 4）Leader and Tail tape A B Components 部品収納部 Symbol C Items Ratings(mm) A No components at trailer min 160 B No components at leader min 100 C Whole leader min 400 5）The tape for chips are wound clockwise, the feeding holes to the right side as the tape is pulled toward the user. 6）Packaging unit: 3,000 pcs./ reel 7） Material： Base Tape Reel … Plastic … Plastic Antistatic coating for both base tape and reel 8）Peeling of force 0.7 N max. 0.1~1.0N 165 to 180 ° Cover Tape カバーテープ ベーステープ Base Tape 23 February 2016 LXDC2UR series Micro DC-DC converter NOTICE 1. Storage Conditions: To avoid damaging the solderability of the external electrodes, be sure to observe the following points. - Store products where the ambient temperature is 15 to 35 °C and humidity 45 to 75% RH. (Packing materials, In particular, may be deformed at the temperature over 40 °C.). - Store products in non corrosive gas (Cl2, NH3,SO2, Nox, etc.). - Stored products should be used within 6 months of receipt. Solderability should be verified if this period is exceeded This product is applicable to MSL1 (Based on IPC/JEDEC J-STD-020). 2. Handling Conditions: Be careful in handling or transporting the product. Excessive stress or mechanical shock may damage the product because of the nature of ceramics structure. Do not touch the product, especially the terminals, with bare ear hands. Doing so that may result in poor solderability. 3. Standard PCB Design (Land Pattern and Dimensions): All the ground terminals should be connected to the ground patterns. Furthermore, the ground pattern should be provided between IN and OUT terminals. Please refer to the specifications for the standard land dimensions. The recommended land pattern and dimensions are shown for a reference puerpose only. Electrical, mechanical and thermal characteristics of the product shall depend on the pattern design and material / thickness of the PCB. Therefore, be sure to check the product performance in the actual set. When using underfill materials, be sure to check the mechanical characteristics in the actual set. 24 February 2016 LXDC2UR series Micro DC-DC converter 4. Soldering Conditions: Soldering is allowed up through 2 times. Carefully perform preheating ：△T less than 130 °C. When products are immersed in solvent after mounting, pay special attention to maintain the temperature difference within 100 °C. Soldering must be carried out by the above mentioned conditions to prevent products from damage. Contact Murata before use if concerning other soldering conditions. Reflow soldering standard conditions (example) Use rosin type flux or weakly active flux with a chlorine content of 0.2 wt % or less. 25 February 2016 LXDC2UR series Micro DC-DC converter 5. Cleaning Conditions: The product is not designed to be cleaned after soldering. 6. Operational Environment Conditions: Products are designed to work for electronic products under normal environmental conditions (ambient temperature, humidity and pressure). Therefore, products have no problems to be used under the similar conditions to the above-mentioned. However, if products are used under the following circumstances, it may damage products and leakage of electricity and abnormal temperature may occur. - In an atmosphere containing corrosive gas ( Cl2, NH3, SOx, NOx etc.). - In an atmosphere containing combustible and volatile gases. - In a dusty environment. - Direct sunlight - Water splashing place. - Humid place where water condenses. - In a freezing environment. If there are possibilities for products to be used under the preceding clause, consult with Murata before actual use. If static electricity is added to this product, degradation and destruction may be produced. Please use it after consideration enough so that neither static electricity nor excess voltage is added at the time of an assembly and measurement. If product malfunctions may result in serious damage, including that to human life, sufficient fail-safe measures must be taken, including the following: (1) Installation of protection circuits or other protective device to improve system safety (2) Installation of redundant circuits in the case of single-circuit failure 7. Input Voltage and Output Current limitation: Products shall be used in the input power capacity as specified in this specifications. Inform Murata beforehand, in case that the components are used beyond such input power capacity range won’t be achieved. 26 February 2016 LXDC2UR series Micro DC-DC converter 8. Limitation of Applications: The products are designed and produced for application in ordinary electronic equipment (AV equipment, OA equipment, telecommunication, etc). If the products are to be used in devices requiring extremely high reliability following the application listed below, you should consult with the Murata staff in advance. - Aircraft equipment. - Aerospace equipment - Undersea equipment. - Power plant control equipment. - Medical equipment. - Transportation equipment (vehicles, trains, ships, etc.). - Automobile equipment which includes the genuine brand of car manufacture, car factory-installed option and dealer-installed option. - Traffic signal equipment. - Disaster prevention / crime prevention equipment. - Data-procession equipment. - Application which malfunction or operational error may endanger human life and property of assets. - Application which related to occurrence the serious damage - Application of similar complexity and/ or reliability requirements to the applications listed in the above. ! Note: Please make sure that your product has been evaluated and confirmed against your specifications when our product is mounted to your product. Product specifications are subject to change or our products in it may be discontinued without advance notice. This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product. 27 February 2016