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SI-8001FDL description the SI-8001FDL dc voltage regulator is a dc-to-dc buck convertor that attains an oscillation frequency of 300 khz, and has an integrated miniaturized choke coil, allowing it to serve as a small, high efficiency power supply in a compact to263 package. the internal switching regulator function provides high efficiency switching regulation without any need for adjustment. the device requires only six external support components. optional on/off control can be performed using a transistor. the SI-8001FDL includes overcurrent and overtemperature protection circuits. applications include: ? dvd recorder ? fpd tv ? telecommunications equipment ? office automation equipment, such as printers ? on-board local power supply ? output voltage regulator for second stage of smps (switched mode power supply) features and benefits ? 3.5 a output current supplied in a small, surface mount power package ? high efficiency: 83% at v in = 15 v, i o = 2.0 a,v o = 5 v ? requires only six external components ? oscillation circuit built-in (frequency 300 khz typical) ? constant-current mode overcurrent protection circuit and overtemperature protection circuit built-in ? output-on state at low level ? low current consumption during output-off state dc-to-dc step-down converter functional block diagram package: to263-5 not to scale latch and driver overcurrent protection overtemperature protection reference voltage osc reset comparator error amplifier v in 1 3 4 2 v out di c2 c1 gnd adj sw in r1 r2 l1 preg on/off 5 vc di spb-g56s (sanken) 27469.064-i
dc-to-dc step-down converter SI-8001FDL 2 all performance characteristics given are typical values for circuit or system baseline design only and are at the nominal operating voltage and an ambient temperature, t a , of 25c, unless oth er wise stated. absolute maximum ratings characteristic symbol remarks rating units dc input voltage v in 43 v vc pin control voltage v c v in v power dissipation p d mounted on 40 mm 40 mm exposed copper area on 40 mm 40 mm glass-epoxy pcb; limited by internal overtemperature protection. 3w junction temperature t j internal overtemperature protection circuit may enable when t j 130c. during product operation, recommended t j 125c. ?40 to 150 c storage temperature t stg ?40 to 150 c thermal resistance (junction-to-case) r jc mounted on 40 mm 40 mm exposed copper area on 40 mm 40 mm glass-epoxy pcb. 3 c/w thermal resistance (junction-to-ambient air) r ja mounted on 40 mm 40 mm exposed copper area on 40 mm 40 mm glass-epoxy pcb. 33.3 c/w selection guide part number output voltage adjustable range (v) efficiency, typ. (%) input voltage, max. (v) output current, max. (a) packing SI-8001FDL-tl 0.8 to 24 83 40 3.5 800 pieces per reel recommended operating conditions* characteristic symbol remarks min. max. units dc input voltage range v in v in (min) is the greater of 4.5 v or v o +3 v. see remarks 40 v dc output voltage range v o 0.8 24 v dc output current range i o v in v o + 3 v; to be used within the allowable package power dissipation characteristics (refer to power dissipation chart). 0 3.5 a operating junction temperature range t jop ?30 100 c operating temperature range t op to be used within the allowable package power dissipation characteristics (refer to power dissipation chart). ?30 85 c *required for normal device functioning according to electrical characteristics table. sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 3 electrical characteristics 1 , valid at t a = 25c, v o = 5 v (adjusted), r1 = 4.2 k , r1 = 0.8 k characteristic symbol test conditions 1 min. typ. max. units reference voltage v adj v in = 15 v, i o = 0.2 a 0.784 0.800 0.816 v reference voltage temperature coefficient ? v adj / ? tv in = 15 v, i o = 0.2 a, t c = 0 to 100 c ? 0.1 ? mv/c efficiency 2 v in = 15 v, i o = 2 a ? 83 ? % operating frequency f o v in = 15 v, i o = 2 a 270 300 330 khz line regulation v line v in = 10 to 30 v, i o = 2 a ? ? 80 mv load regulation v load v in = 15 v, i o = 0.2 to 3.5 a ? ? 50 mv overcurrent protection threshold current i s v in = 15 v 3.6 ? ? a vc terminal control voltage (on) v c(ih) ? ? 0.8 v vc terminal control voltage (off) v c(il) 2?? v vc terminal control current (on) i c(ih) v c = 2 v ? 6 100 a quiescent current 1 i q v in = 15 v, i o = 0 a ? 6 ? ma quiescent current 2 i q(off) v in = 15 v, v c = 0 v ? 30 200 a 1 using circuit shown in typical application circuit diagram. 2 efficiency is calculated as: (%) = ([ v o i o ] [ v in i in ]) 100. terminal list table name number function in 1 supply voltage sw 2 regulated supply output gnd 3 ground terminal adj 4 terminal for resistor bridge feedback vc 5 if the vc terminal is left open, output will be in the on state. because the input level is equivalent to ls-ttl, direct drive by ls-ttl is possible. pin-out diagram 12345 vc pin control input current versus input voltage i o = 0 a, t a = 25c, r1 = 4.2 k , r2 = 0.8 k 40 30 20 10 0 0 10203040 v c (v) i c ( a) sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 4 90 85 80 75 70 65 60 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 i o (a) (%) 6.00 5.00 4.00 3.00 2.00 1.00 0 5.10 5.08 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 012345678 v o (v) efficiency versus output current v o = 3.3 v efficiency versus output current v o = 5.0 v efficiency versus output current v o = 12.0 v low voltage behavior: output voltage versus supply voltage 8v 15 v 40 v 30 v 20 v 01 23 load regulation: output voltage versus output current v o (v) i o (a) 0 2 4 8 6 10 0 10203040 quiescent current versus supply voltage i o = 0 a v c = 0 v i q (ma) v in (v) v in (v) v in 100 95 90 85 80 75 70 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 i o (a) (%) 8v 15 v 40 v 30 v 20 v v in i o v in 0a 0.5 a 1a 40 v 30 v 15 v 10 v 8v 2a 3.5 a 90 85 80 75 70 65 60 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 i o (a) (%) 15v 40 v 30 v 20 v v in v in 15 v 8 v 30 v 40 v behavior at turn-off: quiescent current versus input voltage i o = 0 a v c = 2 v 0 2 1 3 5 4 6 0123 5 4 overcurrent protection: output voltage versus output current v o (v) i o (a) 50 40 30 20 10 0 0 10203040 v in (v) i q ( a) performance characteristics at t a = 25c, v o = 5 v adjusted, r1 = 4.2 k , r2 = 0.8 k sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 5 thermal performance characteristics 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 ?25 0 25 50 75 100 125 power dissipation versus ambient temperature t j (max) = 125c; mounted on glass-epoxy pcb (40 mm 40 mm), with varying exposed copper areas p d (w) t a (c) cu area: 1600 mm 2 r ja = 33.3 c/w cu area: 800 mm 2 r ja = 37c/w cu area: 400 mm 2 r ja = 44 c/w cu area: 100 mm 2 r ja = 53c/w device thermal resistance versus exposed copper area on pcb glass-epoxy pcb, 40 mm 40 mm copper area (mm 2 ) 55 50 45 40 35 30 0 800 1000 1200 1400 1600 200 400 600 1800 r ja (c/w) 6 5 4 3 2 1 0 0 20 40 60 80 100 120 140 180 160 t j (c) v o (v) overtemperature protection: output voltage versus junction temperature v in = 15 v, i o = 10 ma otp on otp off the application must be designed to ensure that the t j (max) of the device is not exceeded during operation. to do so, it is necessary to determine values for maximum power dissipation, p d (max), and ambient temperature, t a (max). the relationships of t j , p d , t a , and case temperature, t c , are as shown in the following formulas: t j ?t c r jc p d = t j ?t a r ja p d = and . p d can be calculated from input values: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = in o o f x o o d v v i v i v p 1 1 100 h where: v o is output voltage in v, v in is input supply voltage in v, i o is output current in a, x is ic efficiency in percent (varies with v in and i o ; refer to efficiency performance curves for value), and v f is forward voltage for the input diode, di. in these tests, the sanken spb-g56s was used, at 0.4 v. for application design, obtain thermal data from the datasheet for the diode. p d is substantially affected by the heat conductance properties of the application, in particular any exposed copper area on the pcb where the device is mounted. the relationships of p d , t a , and copper area is represented in the power dissipation chart. r ja for a given copper area can be determined form the device thermal resistance chart. this can be substituted into the formula above to determine the t j (max) allowable in the application. generally, more than 10% to 20% derating is required. because the heat dissipation capacity of the copper area depends substantively on how it is used in the actual application, thermal characteristics of the application must be confirmed by testing. t c is determined by connecting a thermocouple to the device as shown here: thermocouple mount at tab center and analyzing the results using the following formula: t j = p d r jc + t c , for this device, r jc is 3 c/w. sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 6 component selection v in 1 gnd gnd 2 4 3 gnd vc in sw adj c1 c2 l1 di v o r1 r2 i adj 5 SI-8001FDL component rating c1 470 f c2 680 f di spb-g56s (sanken) l1 47 h vc di r2 r1 all external components should be mounted as close as possible to the SI-8001FDL. the ground of all components should be connected at one point near gnd pin (pin 3). recommended pcb layout recommended solder pad layout typical application diagram diode di a schottky-barrier diode must be used for di. if other diode types are used, such as fast recovery diodes, the ic may be destroyed because of the reverse voltage applied by the recovery voltage or on voltage. choke coil l1 if the winding resistance of the choke coil is too high, the efficiency may be reduced below rating. because the overcurrent protection start current is approximately 4.2 a, atten- tion must be paid to the heating of the choke coil by magnetic saturation due to overload or short-circuited load. capacitors c1 and c2 because for smps, large ripple cur- rents flow across c1 and c2, capacitors with high frequency and low impedance must be used. if the impedance of c2 is too high, the switching waveform may not be normal at low temperatures. do not use either os or tantalum types of capacitors for c2, because the extremely low esr causes an abnormal oscillation. the device is stabilized, and for proper operation, c1 must be located close to the device (see layout diagram, below). resistor bridge r1 and r2 comprise the resistor bridge for the output voltage, v o , and are calculated as follows: () () ) , and (() == = ? = ? = ? ? k i v r2 v i v v r1 adj adj o adj adj o 8 . 0 10 1 8 . 0 10 1 8 . 0 3 3 i adj should always be set to 1 ma. note that r2 should always be present to ensure stable operation, even if v o , is set to 0.8 v (that is, even if there is no r1). v o should be at least v in + 8%. 6.80.1 110.2 90.2 90.1 3.70.05 40.1 1.70.1 10.05 (mm) sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 7 (r0.45) 2.00 0.10 1.30 +0.10 ?0.05 branding xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx dimensions do not include mold protrusion heastsink side flash: 0.8 mm maximum dimensions in millimeters branding codes (exact appearance at manufacturer discretion): 1st line: sk 2nd line, lot: ymw x where: y is the last digit of the year of manufacture m is the month ( 1 to 9, o, n, d ) w is the week of the month ( 1 to 5 ) x is the device subtype suffix number 3rd line, type: 8001fdl 12345 4p1.70 0.25 (4.40) (8.00) 9.90 0.20 10.00 0.02 3xr0.30 3xr0.30 ?1.5 0.20 4.50 0.20 0.10 0.15 (0.75) (4.60) 0.88 0.10 0.80 0.10 9.20 0.20 (6.80) 2.20 0.20 15.30 0.30 4.90 0.20 (0.50) 2.54 0.30 2.40 0.20 (r0.30) (0.75) (0.40) + + 2xr0.30 6o 0o 3o 3o 3o 3o 15o package outline drawing rohs directive compliant device pins lead (pb) free sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 8 tape and reel specification 16.0 4.0 0.10 11.5 0.05 1.75 0.10 2.0 0.10 ?1.5 min material: conductive polysterene camber < 1 mm over 100 mm length of tape pocket inner widths measured 0.3 mm above floor of cavity view a-a view b-b b b aa 24.3 0.03 0.4 0.05 15.7 ?1.5 +0.1 ?0.0 10.6 3.9 4.9 material: conductive polysterene camber < 1 mm over 100 length of tape pocket inner widths measured 0.3 mm above floor of pocket pocket position relative to sprocket hole measured to true position of pocket 10 sprocket hole pitch cumulative 0.2 mm pocket center and pocket hole center 0.3 mm surface resistivity < 10 7 / cm 2 sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 9 packing specification 341 344 65 inner carton 800 pieces per reel 2 reels per carton outer carton 3 inner cartons per outer carton dimensions in mm 230 350 450 sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 10 warning ? these devices are designed to be operated at lethal voltages and energy levels. circuit designs that embody these components must conform with applicable safety requirements. pre cau tions must be taken to prevent accidental contact with power-line potentials. do not connect ground ed test equipment. the use of an isolation transformer is recommended during circuit development and breadboarding. cautions for use ? operation of the product in parallel to increase current is not permitted. ? although the product has an internal overtemperature protection circuit, that is intended only to protect the product from temporary excess heating due to overloads. long-term reliability cannot be guaranteed when the product is operated under continuous overload conditions. because reliability can be affected adversely by improper storage environments and handling methods, please observe the following cautions. cautions for storage ? ensure that storage conditions comply with the standard temperature (5c to 35c) 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 that 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 device, shorts between adjacent products, and shorts to the heatsink. electrostatic discharge ? when handling the products, operator must be grounded. grounded wrist straps worn should have at least 1 m of resistance to ground to prevent shock hazard. ? 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 soldering the products, the head of soldering irons or the solder bath must be grounded in other to prevent leak voltages generated by them from being applied to the products. ? the products should always be stored and transported in our shipping containers or conductive containers, or be wrapped in aluminum foil. soldering ? when manually soldering the products, please be sure to minimize the working time, within the following limits: soldering iron temperature (c) time (s) 38010 3 (once only) ? reflow s oldering can be performed a maximum of twice, using the following recommended profile: 230 30 10s 90 30s 180 150 250 time temperature (c) 250c maximum sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL 11 copyright ? 2007 sanken electric co., ltd. this datasheet is based on sanken datasheet ssj-03151 application and operation examples described in this document are quoted for the sole purpose of reference only, for the use of the products herein, and sanken can assume no responsibility for any infringement of industrial property rights, intellectual property right s, or any other rights of sanken or any third party which may result from its use. when using the products herein, the applicability and suitability of such products for an intended purpose or object shall be r eviewed at the user?s responsibility. although sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semi conductor prod- ucts 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 malfun ction. sanken products listed in this document are designed and intended for the use as components in general purpose electronic equip ment or appa- ratus (home appliances, office equipment, telecommunication equipment measuring equipment, etc.). before placing an order, the user?s written consent to the specifications is requested. when considering 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 y our nearest sanken sales representative to discuss and obtain written confirmation of your specifications. the use of sanken products without the written consent of sanken in the applications where extremely high reliability is requir ed (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited. anti radioactive ray design is not considered for the products listed herein. if there is any discrepancy between english and japanese versions of this datasheet, the japanese version should take precedenc e over the english one. please accept in advance that the content of this datasheet is subject to change without notice for the purpose of such as impr ovement of the product. sanken electric co., ltd. 3-6-3 kitano, niiza-shi, saitama-ken 352-8666, japan phone:+81-48-472-1111 http://www.sanken-ele.co.jp
dc-to-dc step-down converter SI-8001FDL june , 2007 sanken electric co., ltd. i02-006ea-070628 asia pacific china sanken electric hong kong co., ltd. suite 1026 ocean centre, canton road, tsimshatsui, kowloon, hong kong tel: 852-2735-5262 fax: 852-2735-5494 sanken electric (shanghai) co., ltd. room3202, maxdo centre, xingyi road 8, changning district, shanghai, china tel: 86-21-5208-1177 fax: 86-21-5208-1757 taiwan sanken electric co., ltd. room 1801, 18th floor, 88 jung shiau east road, sec. 2, taipei 100, taiwan r.o.c. tel: 886-2-2356-8161 fax: 886-2-2356-8261 india saket devices pvt. ltd. office no.13, first floor, bandal - dh ankude plaza, near pmt depot, paud ro ad, kothrud, pune - 411 038, india tel: 91-20-5621-2340 91-20-2528-5449 fax: 91-20-2528-5459 japan sanken electric co., ltd. overseas sales headquaters metropolitan plaza bldg. 1-11-1 nishi-ikebuk uro, toshima-ku, tokyo 171-0021, japan tel: 81-3-3986-6164 fax: 81-3-3986-8637 korea sanken electric korea co., ltd. mirae asset life bldg. 6f, 168 kongduk-dong, mapo-ku, seoul, 121-705, korea tel: 82-2-714-3700 fax: 82-2-3272-2145 singapore sanken electric singapore pte. ltd. 150 beach road, #14-03 the gateway west, singapore 189720 tel: 65-6291-4755 fax: 65-6297-1744
dc-to-dc step-down converter SI-8001FDL june , 2007 sanken electric co., ltd. i02-006ea-070628 europe united kingdom sanken power systems (uk) limited pencoed technology park, pencoed, bridgend cf35 5hy. uk tel: 44-1656-869-100 fax: 44-1656-869-162 north america united states allegro microsystems, inc. 115 northeast cutoff, worcester, massachusetts 01606, u.s.a. tel: 1-508-853-5000 fax: 1-508-853-3353 allegro microsystems, inc. (southern california) 14 hughes street, suite b105, irvine, ca 92618 tel: 1-949-460-2003 fax: 1-949-460-7837

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