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ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 1 http://www.sanken - ele.co.jp general descriptions the nr 1 3 0 series is buck regulator ics integrates high - side power mosfet s . with the current mode control, ultra low esr capacitors such as ceramic capacitors can be used. the ic s can realize super - high efficiency by performing pulse skip operation at light load condition . the ics have protection functions such as o ver - c urrent p rotection (ocp) , u nder - v oltage l ockout (uvlo) and t hermal s hutdown (tsd) . soft starting time can be set up by selecting an external capacitor value. the on/off pin (en pin) turns the regulator on or off and helps to achieve low power consumption requiremen ts. the nr130 series is available in an 8 - pin soic package . features & benefit s ? current mode pwm control ? up to 94% efficiency at normal load condition ? up to 85 % efficiency at light load condition ? stable with low esr ceramic output capacitors ? built - in protection function over current protection (ocp) thermal shutdown (tsd) under voltage lockout (uvlo) ? built - in phase compensation ? adjustable soft - start with an external capacitor ? turn on/of the regulator function programable pulse - skip operation package ? soic8(sop8) electrical characteristics ? 3a continuous output current ? operating input range v in = 4.5v 17 v ? output adjustable v o = 0.8v 14v ? fixed 350khz frequency application s ? lcd tv / blu - ray / set top box ? green electronic products ? other power supply typical application c ircuit arial 10pt k c1, c2: 10f / 25v, c4, c5: 22 f / 16v, c7: 0.1f, c9:1800pf , c 11: 220pf(option) , r1: 510k , r3: 10, r4: 36 k, r5: 27k (vo=5.0v), r6: 12 k, r7:510k(option), d1: sjpj - l 4 , l1: 10h for NR131S NR131S nr134s NR131S
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 2 http://www.sanken - ele.co.jp series lineup product name f sw v in v o i o pin no.1 function pin no.2 function package NR131S 350khz 4.5v to 17 v (1) 0.8v to 14v (2) 3a nc in soic8 nr134s in nc (1) the minimum input voltage shall be either of 4.5v or vo+3v, whichever is higher. (2) the i/o condition limited by the minimum on - time (ton(min)). absolute m aximum r atings parameter symbol ratings units conditions dc input voltage v in 19 v bs terminal voltage v bs 24.5 v sw terminal voltage v sw 19 v fb terminal voltage v fb 5.5 v en terminal voltage v en 19 v ss terminal voltage v ss 7.4 v ss terminal allowable input current issb 5 ma power dissipation (3 ) p d 1 1.42 w glass - epoxy board mounting in a 40 40 mm. (copper area in a 2525mm) max t j =150c junction temperature ( 4 ) t j ? 40 ~ 150 c storage temperature t s ? 40 ~ 150 c thermal resistance (junction - pin no. 4 ) jp 60.8 c /w thermal resistance (junction - ambient air) ja 88.2 c /w glass - epoxy board mounting in a 40 40 mm. (copper area in a 2525mm) ( 3 ) limited by thermal shutdown. ( 4 ) the temperature detection of thermal shutdown is about 16 5 c c1, c2: 10f / 25v, c4, c5: 22 f / 16v, c7: 0.1f, c9:1800pf , c 11: 220pf(option) , r1: 510k , r3: 10, r4: 36 k, r5: 27k (vo=5.0v), r6: 12 k, r7:510k(option), d1: sjpj - l 4 , l1: 10h for nr134s nr134s
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 3 http://www.sanken - ele.co.jp recommended o perating c onditions parameter symbol ratings units conditions m in m ax dc input voltage (5 ) v in v o +3 17 v dc output current (6 ) (7 ) i o 0 3.0 a output voltage v o 0.8 14 v ambient o perating temperature (7 ) t op ? 40 85 c ( 5 ) the minimum value of input voltage is taken as the larger one of either 4.5 v or v o +3v. in the case of v in =v o +1 v o +3v , it is set to i o = max. 2a (6) recommended circuit refer s to typical application circuit . (7) to be used within the allowable package power dissipation characteristics .
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 4 http://www.sanken - ele.co.jp electrical c haracteristics ta = 25c parameter symbol ratings units test conditions m in t yp m ax reference voltage v ref 0.78 0 0.800 0.8 20 v v in = 12v i o = 1.0a output voltage temperature coefficient S v ref / S t 0.05 mv/ c v in = 12v, i o = 1.0a ? 40 c to +85 c switching frequency f sw 2 45 350 4 55 khz v in =12v, v o =5.0 v, i o =1a line regulation (8 ) v line 50 mv v in = 8 v 17 v, v o = 5.0 v, i o = 1a load regulation (8 ) v load 50 mv v in = 12v, v o = 5.0 v, i o = 0.1a 2.0 a over current protection threshold i s 3.1 4.5 a v in = 12v, v o = 5.0 v supply current (non - switching) i in 100 a v in = 12v , v en = 12v shutdown supply current i in(off) 1 a v in =12v , v en = 0v input under voltage lockout threshold vuvlo 3.9 4.4 v v in rising ss pin c harging current i ss 13 22 31 a v ss =0v, v in =12v ss start voltage vss1 0.5 v in =12v ss finish voltage vss2 1.4 v in =12v en pin sink current i en 5 1 0 a v en = 1 2 v threshold voltage v e n 0.7 1. 3 2.1 v v in =12v max on - d uty (8 ) d max 90 % v in =12v minimum on - tim e (8 ) t on( min ) 1 7 0 nsec v in =12v thermal shutdown threshold temperature (8 ) tsd 151 165 c v in =12v thermal shutdown restart hysteresis of temperature (8 ) tsd_hys 15 c v in =12v (8 ) guaranteed by design,not tested.
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 5 http://www.sanken - ele.co.jp typical performance characteristics nr 131 s t ypical performance characteristics (1) efficiency ffficiency [%] output current i o [a] condition: v o =3.3v efficiency [%] output current i o [a] condition:v o =5.0v 50 60 70 80 90 100 0.001 0.01 0.1 1 10 vin=6v vin=8v vin=10v vin=12v vin=14v vin=16v 50 60 70 80 90 100 0.001 0.01 0.1 1 10 vin=6v vin=8v vin=10v vin=12v vin=14v vin=16v
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 6 http://www.sanken - ele.co.jp (5) over current protection (2) output startup io=1a (3) load regulation : v load (6) supply current : i in supply current : i in (4) shutdown supply current : i in(off) (7 ) switching frequency: f sw output current i o [a] input voltage vin [v] output voltage v o [v] input voltage vin [v] output current i o [a] output voltage v o [v] input current iin [ma] input voltage v in [v] input current iin [ma] output current i o [a] frequency f osc [khz] v en =0v v o =5.0 v 4.700 4.750 4.800 4.850 4.900 4.950 5.000 5.050 5.100 5.150 5.200 5.250 5.300 0.0 0.5 1.0 1.5 2.0 2.5 3.0 vo [v] io [a] nr116kloadreg. vo=3.3v l=10uh ta=25 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 0.0 1.0 2.0 3.0 4.0 5.0 fosc [khz] io [a] nr110k focs vo=3.3v l=10uh - 0.10 - 0.05 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.0 5.0 10.0 15.0 20.0 25.0 30.0 iin [ma] vin[v] nr110k,111k,114k,115k,116k,117k iq_off 0 1 2 3 4 5 6 1 2 3 4 5 6 vin=8[v] vin=12[v] vin=16[v] 0 1 2 3 4 5 6 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 0 1 2 3 4 5 6 7 8 0 3 6 9 12 15 18
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 7 http://www.sanken - ele.co.jp functional block d iagram NR131S nr134s p . r e g c u r r e n t s e n s e a m p o s c d r i v e r e g p w m l o g i c b s s w f b n c e n e r r a m p i n 0 . 8 v 6 1 5 3 8 2 g n d 4 7 s s o c p o n / o f f v r e f 0 . 8 v 3 . 5 v 3 . 5 v u v l o 2 2 u a s s t s d c o m p e n s a t i o n s k i p b s d e t t h r e s h o l d s e l e c t i n i t
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 8 http://www.sanken - ele.co.jp pin asignments & f unctions pin assignments pin assignments & functions of nr 130s series pin no. symbol description 1 nc or in NR131S : no connection .(nc) nr134s : power i nput . vin supplies the power to the ic.as well as the regulator switches 2 in or nc NR131S: power i nput . vin supplies the power to the ic.as well as the regulator switches nr134s : no connection .(nc) 3 sw power s witching o utput . sw supplies power to the output. connect the lc filter from sw to the output. connect a schottky barrier diode between sw and gnd. note that a capacitor is required from sw to bs to supply the power the high - side switch 4 gnd ground connect the exposed pad to pin no.4 5 fb feedback input pin to compare reference voltage . the feedback threshold is 0.8v. to set the output voltage, fb pin is required to connect between resistive voltage divider r4 and r6. 6 en enable input. drive en pin high to turn on the regulator, low to turn it off. 7 ss soft - start and skip operation control input. to set the soft - start period, connect to a capacitor between gnd. to set the low ripple skip operation, add the resister 510k ohm between ss terminal and in terminal. 8 bs high - side boost input. bs supplies the drive for high - side nch - mosfet switch. connect a capacitor and a resistor between sw to bs. NR131S nr134s
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 9 http://www.sanken - ele.co.jp example application circuit a design guide for add - on parts around of the nr130s series. (1)diode d1 ? the schottky - barrier diode must be used for d1. if other diodes like fast recovery diodes are used, ic may be damaged because of the reverse voltage applied by the recovery voltage or on voltage. (2)choke coil l1 ? if the winding resistance of the choke coil is too h igh, the efficiency may go down to the extent that it is out of the rating. ? as the start current of the over current protection is approximately 4a, attention must be paid to the heating of the choke coil by the magnetic saturation due to overload or shor t - circulated load. (3)capacitor c1 ( c2 ) , c4 (c5), c9 ? as large ripple current across c1 (c2) and c4 (c5), capacitors with high frequency and low impedance for smps must be used. especially when the impedance of c4 (c5) is high, the switching waveform may not be normal at low temperature. ? c9 is a capacitor f or soft start. in case soft start function is not used, please keep pin no.2 open. c1, c2: 10f / 25v, c4, c5: 22 f / 16v, c7: 0.1f, c9:1800pf , c 11: 220pf(option) , r1: 510k , r3: 10, r4: 36 k, r5: 27k (vo=5.0v), r6: 12 k, r7:510k(option), d1: sjpj - l 4 , l1: 10h c1, c2: 10f / 25v, c4, c5: 22 f / 16v, c7: 0.1f, c9:1800pf , c 11: 220pf(option) , r1: 510k , r3: 10, r4: 36 k, r5: 27k (vo=5.0v), r6: 12 k, r7:510k(option), d1: sjpj - l 4 , l1: 10h for NR131S for nr134s NR131S nr134s
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 10 http://www.sanken - ele.co.jp (4)resistor r1, r2 ? r4, r5, r6 are resistor to the output voltage. in case of the i( adj ) = 66 a , r4, r5, r6 ar e calculated by the next equation . *63k = 27k ? 36k in order to have optimum operating condition, each component must be connected with the minimum distance.
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 11 http://www.sanken - ele.co.jp allowable package power dissipation notes: 1) glass - epoxy board mounting in a 3030mm 2) c o pper area : 2525mm 3) the power dissipation is calculated at the junction temperature 125 c 4) losses can be calculated by the following equation. as the efficiency is subject to the input voltage and output current, it shall be obtained from the efficiency curve and substituted in percent 5) thermal design for d1 shall be made separately. v o: output voltage v in : input voltage i o : output current ??? 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 - 25 0 25 50 75 100 125 S?p? pd[w] power dissipation ?? ta[ ] ambient temperature ? ? ? ? ? ? ? ? ? ? ? ? 1 x 100 o i o v d p
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 12 http://www.sanken - ele.co.jp pcb layout recommendation *the demonstration printed circuit board. i t can mount a part for the experiment , exc ept for the example a pplication circuit . * this pattern layout is for nr131a/NR131S. i n case of the nr134s , vin must change a connection to 1 pin . note 1) s ize of the pcb is about 40 mm 40 mm 2) dimension is in millimeters , dimension in bracket is in inches. 3) drawing is not to scale. front side: component side (double sided board) pcb ?Y : gnd I recommended land pattern back side: gnd side (double sided board)
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 13 http://www.sanken - ele.co.jp package outline, dimensions soic8 package (units marking *1. product number NR131S nr134s *2. lot number (three digit) 1st letter : the last digit of the year 2nd letter : month january to september : 1 to 9 october : o november : n december : d 3rd letter : manufacturing week first week to 5th week : 1 to 5 *3. control number (four digit) symbol dimension is in millimeters (mm) min typ max a1 0.05 0.15 0.25 a2 1.25 1.40 1.65 0.38 0.51 d 4.80 4.90 5.00 e 5.80 6.00 6.20 e1 3.80 3.90 4.00 1.27 0.45 0.6 0.8 top view bottom view nr131 s *2 sk *3 *1 1 2 3 4 8 7 6 5
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 14 http://www.sanken - ele.co.jp o perating precautions r eliability can be affected adversely by improper storage environment s and handling methods . p lease observe the following cautions. heat dissipation and reliability thermal performance of the surface mo unt package ic depends on th e material and area size of pcb a nd its coppe r plane. design thermal condition with sufficient margin parallel operation the parallel operation to increase the current is not available. thermal shut down the nr130sseries has a thermal protection circuit. this circuit protects the ic from the heat ge neration by the over load. this circuit cannot guarantee the long - term reliability against the continuously over load statu s. cautions for storage ? ensure that storage conditions comply with the standard temperature (5 to 35 c ) and the standard relative humidity (around 40 to 75%) ; avoid storage locations that experience extreme changes in temperature or humidity. ? avoid locations where dust or harmful gases are present and avoid direct sunlight. ? reinspect for rust on leads and solderability of products t hat have been stored for a long time. cautions for testing and handling ? when tests are carried out during inspection testing and other standard test periods, protect the products from power surges from the testing products, shorts between the product pins , and wrong connections. in addition, avoid tests exceeded ratings soldering when soldering the products, please be sure to minimize the working time, within the following limits. ? reflow preheat ; 180 c / 9 0 30 s heat ; 250 c / 10 1s (260 c peak ,2times) ? soldering iron ; 38010c / 3 .5 0.5 s ( 1time ) electrostatic discharge ? when handling the products, the operator must be grounded. grounded wrist straps worn should have at least 1m of resistance from the operator to ground to prevent shock hazard, and it should be placed near the operator. ? workbenches where the products are handled should be grounded and be provided with conductive table and floor mats. ? when using measuring equipment such as a curve tracer, the equipment should be grounded. ? when solderi ng the products, the head of a soldering irons or the solder bath must be grounded in order to prevent leak voltages generated by them from being applied to the products. ? the products should always be stored and transported in sanken shipping containers or conductive containers, or be wrapped in aluminum foil.
ultra light load high efficiency,vin=17v,curren t mode step - down io=3a buck regulator ic nr130s series sanken electric co., ltd. sep / 10 /201 3 rev. 1 . 2 15 http://www.sanken - ele.co.jp i m portants notes ? the contents in this document are subject to changes, for improvement and other purposes, without notice. make sure that this is the latest revision of the document before use. ? application and operation examples described in this document are quoted for the sole purpose of reference for the use of the products herein and sanken can assume no responsibility for any infringement of industrial property rights, intellectual prop erty rights or any other rights of sanken or any third party which may result from its use. ? although sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products at a certain rate is inevitable. users of sanken products are requested to take, at their own risk, preventative measures including safety design of the equipment or systems against any possible injury, death, fires or damages to the society due to device failure or malfunc tion. ? sanken products listed in this document are designed and intended for the use as components in general purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). when conside ring the use of sanken products in the applications where higher reliability is required (transportation equipment and its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), please contact your nearest sanken sales representative to discuss, prior to the use of the products herein. the use of sanken products without the written consent of sanken in the applications where extremely high reliability is required (aerospace equipment, nuclear p ower control systems, life support systems, etc.) is strictly prohibited. ? in the case that you use sanken semiconductor products or design your products by using sanken semiconductor products , the reliability largely depends on the degree of derating to be made to the rated values. derating may be interpreted as a case that an operation range is set by derating the load from each rated value or surge voltage or noise is considered for derating in order to assure or improve the reliability. in general, derating factors include electric stresses such as electric voltage, electric current, electric power etc., environmental stresses such as ambient temperature, humidity etc. and thermal stress caused due to self - heating of semiconductor products . for these stresses, instantaneous values, maximum values and minimum values must be taken into consideration. in addition, it should be noted that since power devices or ics including power devices have large self - heating value, the degree of derating of junction temperature affects the reliability significantly. ? when using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, chemically or otherwise processing or treating the products, please du ly consider all possible risks that may result from all such uses in advance and proceed therewith at your own responsibility. ? anti radioactive ray design is not considered for the products listed herein. ? sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of sanken s distribution network . ? the contents in this document must not be transcribed or copied without sankens written consent.

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