BSV-1.8S4R0NA

BSV-NANO BELLNIX | Alldatasheet

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Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 ■ Features ・ Ultra Small 11×11mm ・ Ultra Thin 3.2mm ・ High-Speed Load Response ・ Output Accuracy ±1% ・ High Efficiency ・ Over Current Protection ・ Under Voltage Lock Out ・ Remote ON/OFF Control ・ Adjustable Output Voltage ・ Surface Mount Package ・ Heat Sink Not Required ・ Non-Isolated Type converter ・ Operating Temp Range -40° C to + 85° C Temp Derating Required ・ RoHS Compliant ■ Model/Rating Table 1 Models BSV-nano Series Input V Vdc Output V Vdc Output I A Output ADJ Vdc Ripple Noise mVpp(typ) Efficiency %(typ) Note 1: Ripple noise, efficiency value is when input voltage is 5V and load is rated. Note 2: Ripple noise is measured at 20MHz bandwidth, with a multi layered ceramic capacitor with 47 µF at input and 22 µF at output. Note 3: Depending on ambient temperature, coolin g airflow may be required. ■ Specification Table 2 Input voltage range Refer to Table 1 Rated output voltage 1.8V±1%typ （ Trim pin OPEN ） Adjustable output voltage range 0.8-1.8V Line regulation 0.2%typ (Rated output, input voltage varying from 3.0 to 5.5 ） Load regulation 0.2%typ (Rated input/output voltage, load varying from 0 to 100% ） Temp regulation 0.007%/° C typ. (Rated input/output, Operating temp varying from −40° C - +70° C) Ripple noise Refer to Table 1 (Rated input/output, Common temp, measurement frequency bandwidth 20MHz ） Efficiency 90% typ. at Output current 2A 87% typ. at Output current 4A (Refer to Table1) Start up time 2.8ms typ （ Resistance load ） Max output load capacity 2200 µF max Over current protection Operate at 105% or above of rated load current, Auto restart type Over voltage protection None Under Voltage Lock Out Yes Input over current protection None Remote ON/OFF control Between 7pin （ ON/OFF ） - 5pin （ GND ） :Output is ON when open, output is OFF when short.(Please refer to pg8 ） Standby current 0.2mA typ P-Good signal Normal output :HIGH Abnormal output : LOW (Open drain) Remote sensing Yes Operating temp range −40° C - +85° C (Refer to pg4 fo r derating) Storage temp range −40° C - +85° C Humidity range 20 to 95%R.H. (Max wet bulb temp 35° C with no condensation ） Storage conditions Below 30° C/60% R.H. before mount ing the converter Cooling conditions Refer to pg4 for derating Vibration 5-10Hz total altitude 10mm, 10 to 55Hz ac celeration 2G (1H for each of three directions) Impact Acceleration 20G, (3 times for each of three directions), Impact time: 11±5ms Weight 1.0g typ Dimensions W=11.0 L=11.0 H=3.2 （ mm ） Refer to pg5 for details. *The above specification is provided with rated value, unless otherwise specified. *The contents provided in this datasheet may be ch anged at any time without notice. BSV-nano Series is a small (11x11x3.2mm), light, 4A out put step-down DC-DC converter with low output voltage from 0.8V and an accuracy of ±1 ％ typ. It can support the latest DSP, ASIC applications. High efficie ncy and high-speed response with synchronous rectification have been a chieved along with space- saving packaging. This product will exceed your expectations.

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 1. Usage range This specification is for direct input, non-isolated type DC-DC converter BSV-1.8S4R0NA . 2. Model Name/Rating Model Type Rated input voltage Rated output Package Memo BSV-1.8S4R0NA DC5.0V 1.8V, 4.0A SMD Input/output will be rated and ambient temp is at 25° C±5° C unless otherwise specified. 3. Environmental conditions 3-1. Temp Range Active -40° C - +85° C (Derating required) Storage -40° C - +85° C 3-2. Humidity Range Active 20 - 95 ％ RH (The max wet bulb temp is 35° C with no condensation) Storage 20 - 95 ％ RH (The max wet bulb temp is 35° C with no condensation) Note: A condition of the storage before mounting should be less than 30° C/60%R.H. 4. Specification/Rating The product is RoHS compliant. 4-1. Input characteristics Item Specification/Rating Conditions Input voltage ＋ 3.0 - 5.5V (Rating at 5.0V) Input current 1.7A typ. During rated input/output Standby current 0.2mA typ. Vin=5.0V, SHORT between ON/OFF pin – GND pin

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 4-2. Output characteristics/Functions *1, *2 Item Specification/Rating Conditions Output voltage 1.8V Adjustable output voltage 0.8V - 1.8V External resistor required Output current 0 - 4.0A Temp Regulation ±0.007%/° C typ. Temp varying from - 40° C to +70° C Efficiency 90% typ. (Io=2.0A), 87% typ. (Io=4.0A) Ripple noise 10mVp-p typ. 50mVp-p max. Bw=20MHz, Measured at both sides of an external capacitor Over current protection Operate at 105% or above, Auto restart type Over voltage protection No Under voltage lock out Yes Start-up voltage: 2.85 typ. Stop voltage: 2.75 typ. ON/OFF control Between ON/OFF pin and GND pin Short(0 - 0.9V 0.2mA typ.) P-Good low level voltage 0.3V max. Sink current 4mA max. Max output load capacity 2200 µF max. *1 Referring to measurement circuit in section 4-3. *2 The above items are measured with input voltage at 5.0V, output voltage 1.8V, output current 4.0A and the ambient temp at 25° C±5° C unless otherwise noted. 4-3. Measurement Circuit Vin C1 ON/ OF F Vin Vou t Trim Loa d BSV-1 .8S4R 0 NA GND SW Open =O n Sh ort=O ff R 1:47 kΩ Te st pin R 2 V A A V O s c illo s c o p e ( OSC ) Oscilloscope （Measuring ripple noise） Coaxial :50 Ω 1. 5m R1: 51Ω C3: 0.1 μF C1: 47μF（Mu lt i-layered c eramic capacitor） C2: 22μF（Mu lt i-layered c eramic capacitor） GND R 2:Vou t Down setting resist or R 1 P-G ood 2

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 5. Temperature Derating The product requires to be placed on PCB with good airflow due to a design to release heat through the PCB. The patterns to the converter should be taken thick and wide, especially lines to GND pin, for it has a larger heat release. The derating curve below is when BSV-1.8S4R0NA is mounted onto the double-sided board (Copper coating thickness 35 µm, Copper coating dimension 100mm x 100mm, PCB thickness 1.6mm). The heat release characteristics may change depending on wiring. Since the temperature characteristics are largely affected by PCB and the ambient temperature, it is important to make sure that IC surface temp of the converter does not exceed 120° C when operated at the max ambient temperature in an actual device. - 4 0 - 3 0 - 2 0 - 1 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 Ambient Temperature ( ° C) - 4 0 - 3 0 - 2 0 - 1 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 Ambient Temperature ( ° C) 2m/s 1m/s 0m/s Vin=5V Vout=1.8V Vout=0.8V Vout=1.2V Vout=1.8V Vin=5V 0m/s Output Current (A) Output Current (A)

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 6. Outer dimensions and pin information 6-1.Configurations/Dimensions 11 .0 ±0 .5 11.0± 0.5 3.2 max. T op Vi ew Side View Bottom View

1 Pin Mark

① ② ③ ④ 3. 5 4. 0 ⑧ ⑦ ⑥ ⑤ 9.0 1.1 1.1 0. 5 1. 5 3. 0 3 .5 2. 0 4. 0 1.1 1.1 3.0 2 .0 0.5 1.5 B e l l 3 .1± 0 .5 5.4± 0.5 I C 1.8S4 Pick Up Point Company Logo Model Name Lot No. - Unit mm - Tolerance unless otherwise specified ±0.2 - Weight = 1.0g typ Pick up point: See the drawing on the left for the position - Pin’s variation is 0.2 mm max (when placed on the level). - Pin material and plating Material: Copper Plating: Nickel plating followed by gold plating Note) Make sure to use a pick up point as indicated in the drawing on the left during auto-mounting. Picking up at IC has to be avoided. Pin Function ① Vin ② P-Good ③ Test pin ④ Vout ⑤ GND ⑥ Trim ⑦ ON/OFF ⑧ GND

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 6-2. Recommended footprint 1.4 1.4 3.3 2.3 T op View ① ② ③ ④ 3.5 4.0 ⑧ ⑦ ⑥ ⑤ 8.6 1.4 1.4 0 .5 1.5 3.3 3.5 2. 3 4 .0 0.5 1.5 12.6 Note: The above measurement is a recommended footpr int as a reference. Footprints may vary depending on customer’s requirements. 6-3. Lot Display 0 1 (Manufactured in 2010, January) D 2 (Manufactured in 2010, December) Internal Number (There may be no indication) Manufacturing Month (1st-9th month = Jan-Sep, 10 th month=Oct, 11 th month=Nov, 12 th month=Dec) Manufacturing Year (Last digit of the year) Note: Do not wire in the area on PCB where the converter is placed since it has its own wiring at the bottom.

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 7. Usage information 7-1. Standard connection diagram +Vin +Vout Trim PG ON/OFF GND +Vin C1 Load BSV-1.8S4R0NA 1 4 SW Open=On Short=Off R1 ： Vout Down Setting Resistor C1：47μF C2：22μF GND Test pin Note1: The product requires to be mounted on the PC B since most of the heat is released mainly through GND pins (5, 8pin) and the rest through +Vi n pin and +Vout pin. The patterns should be taken wide enough to release heat when designing . It is important that surface temp of IC does not exceed 120° C. Note2: Keep ON/OFF pin open when not using ON/OFF control. Note3: P-Good pin is an open drain output. Use P-Go od feature with input voltage pulled up by resistance. Note4: Keep Trim pin open when not using adjustable output. Note5: Keep Test pin (3pin) open and fix the conver ter on the board with a land. It is important that the land should not be connected to GND or +Vin lines. Note6: GND pins (5, 8pin) are connected internally. These two pins should be connected to GND line to make the best use of the product. Recommended capacitor ＝ 47 µF C2 ＝ 22 µF - 200 µF C1: Not required as long as impedance is very low and lines between +Vin side and the converter are connected thick and short. For high impedance, adding an organic semiconductor solid capacitor or a multi-layered ceramic capacitor is recommended. C2: Not required due to an internal output capacitor. A multi-layered ceramic capacitor will be recommended if noise reduction is required and it should be placed on the load side.

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 7-2. ON/OFF control Output voltage can be turned on and off without dis connecting input by using ON/OFF control feature. The ON/OFF pin is connected to +Vin pin in ternally and has to be kept OPEN when not using the ON/OFF feature. At 3.3V input ON OPEN between ON/OFF pin (7pin) and GND pin (5pin ) or HIGH (2.6V – 5.5V) OFF SHORT between ON/OFF pin (7pin) and GND pin (5p in) or LOW （ 0.65V or below ） At 5.0V input ON OPEN between ON/OFF pin (7pin) and GND pin (5pin ) or HIGH （ 3.75V – 5.5V ） OFF SHORT between ON/OFF pin (7pin) and GND pin (5p in) or LOW （ 0.9V or below ） +Vin GND or 5,8 ON/OFF 0.2mA typ. 7-3. Adjustable method for output voltage Keep Trim pin (6pin) OPEN, when using output voltage at 1.8V without adjustment. Output voltage may be adjusted between 0.8 and 1.8V by connecting a resistor between Trim pin (6pin) and GND pin (5pin). Wiring for Trim pin should be short and straight pr eferably when using adjustable output voltage feature. If noise appears on the pin, it causes mal-function. The below formula should be referred for external r esistance. It is important to check output voltage and adjust resistance in an actual device When setting output voltage between 0.8V and 1.8V 112

2 RVout IR

Vout RRx −−× ×= （ Ω） R1=47000 （ Ω） , R2=63800 （ Ω） , I1=0.000028186 （ A） , Vout=Desired output voltage （ V） e.g. Output voltage （ V） Rx calculated value （ kΩ）

1.8 OPEN

1.5 273.85 1.2 80.97 1.0 32.92 0.8 4.13 + Vou t T rim G ND R x I 1

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 7-4 P-Good pin Output state of the converter may be obtained by using P-Good pin (2pin), an open drain output. The P-Good features can be used by placing a resistor between +Vin pin and P-Good pin (5.5Vmax). When output voltage goes out of the converter’s pre-set range, P-Good pin becomes SHORT (LOW). Output voltage － Set voltage | ≦ 0.2V typ /barb2right OPEN (HIGH) However, even if the above conditions are fulfilled, output voltage may decrease to low under the following circumstances. ・ At start-up (4ms typ) ・ Input voltage 3V or below ・ Over current state ・ IC’s surface temp 120° C or above P- Go od +V in G ND 5, 8 47 kΩ Amount of start-up time required for activating output voltage and P-Good signal Input voltage ON/OFF pin Output voltage P-Good pin voltage Sta rt up vol tage St art u p vol tage

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 8. Protection method against reverse connection for input power supply (e.g.) The product will break if the input polarity is con nected in reverse. Adding protection circuit is recommended as shown below. A diagram below includes a fuse and a diode. +Vin +Vout Test pin Trim P-Good on/off GND FUSE +Vin D1 Load BSV-1.8S4R0NA 1 4 5,8 9. Over voltage protection circuit (e.g.) The product does not have over voltage protection feature. When switch element inside the product breaks in short mode, DC input voltage will be reflected directly to the output. Therefore an input shut-off circuit below is recommended in case of breakage in over voltage mode. +Vin +Vout Test pin Trim P-Good on/off GND FUSE +Vin SCR Load BSV-1.8S4R0NA 1 4 5,8 Over Voltage Detection Circuit Note1: ON/OFF control will not work when the converter breaks in an over voltage mode. Note2: If there is ON/OFF control feature on the electrical supply source side, it can also be used. Note3: DC power supply should have enough capacity to melt a fuse.

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 10. Mounting conditions Conditions stated below are required to be followed when storing before mounting. Flow soldering should be avoided. 10-1. Re-flow method Pre-heat temp: 150 - 180° C, 60sec max. (Refer to th e chart below) Peak temp: 250° C max. 220° C or above, 60sec max. Number of re-flows: twice Note1) Make sure not to vibrate during re-flow or components of the converter may be dislocated. Note2) After mounting the converter to PCB, re-flow can not be repeated with the PCB turned upside down. P eak:250℃ max 2 20℃ 1-4℃/sec 2℃/s ec max 2.3℃/se c max 60sec max 60sec max 150℃ 180℃ Time T e m p Temp regulation point = the component surface temp 10-2. Storage before mounting This is a MSL 3 product. Store the product at 30° C/60% RH or below after opening the dry pack. Baking (125° C ±5° C, 12H) is required before the re-flow if the storage period exceeds one year in a dry pack condition and 168 hours at 30° C/60% RH in an open dry pack condition. 11. Vibration and shock test Vibration 5-10Hz All amplitudes 10mm, 10-55Hz Accel eration 2G (3 direction for 1H each) Shock Acceleration 20G (3 direction, 3 times each) Shock time 11±5ms 12. Cleaning conditions The product can not be washed as a whole. Non-scrub flux is recommended.

Small Type High-Speed Response POL DC-DC Converter BSV-nano Series DC-DC Converter BDD20110228 13. Precautions For the safety of our customer, please follow all warnings and specifications stated below. - This product is intended for use in general electronic appliances (office work machines, telecommunication equipment and measurement equipment). Do not use for medical equipment, nuclear power equipment and trains, etc. where the malfunction and damage of this product may directly cause harm to human life and/or property. Confirmation is recommended when using in other than general electronic equipment. - Parallel and serial operations are not possible. - Refrain from using connectors and sockets when mounting the product. The performance may not be fulfilled by the effect of contacting resistors. Make sure to mount onto the PCB by soldering. - Though over current and short circuit protections are built in, long time use in short circuit should be avoided since it may cause failure to the product. - The product may be damaged if used in environments where the electric and temp characteristics are out of specification. - Do not store this product where corrodible gases and dusts may generate. - There is a possibility that the product may be damaged from static electricity. The workers should discharge all static electricity before handling the product and the work atmosphere should also have a static countermeasure. - This product does not have a fuse built in. When the converter is in an abnormal state, please connect a fuse into +input line as a protection of over current. The electrical supply source should have enough capacity to be able to shut down a fuse. - The product does not have an over voltage protection circuit built in. When large amount of voltage occur inside the module, there is a mode in which it is directly released from the output and may cause smoke or fire. Therefore, an over voltage protection circuit should always be added. - No test certificate is attached to the product. 14. Warranty The period of warranty for this product is 1 year. During this time, if any defects occur in which our company’s design or production is to blame we will either fix the product or trade with a new one free of charge. However, this warranty is voided if the product has been internally modified or adjusted. The warranty covers only the stated products in this datasheet. 15. If you have any further technical questions for this product, Please contact us: E-mail: info@bellnix.com http://www.bellnix.com