? semiconductor components industries, llc, 2001 october, 2001 rev. 11 1 publication order number: cs8183/d cs8183 dual micropower 200 ma low dropout tracking regulator/line driver the cs8183 is a dual low dropout tracking regulator designed to provide adjustable buffered output voltages that closely track ( 10 mv) the reference inputs. the outputs deliver up to 200 ma while being able to be configured higher, lower or equal to the reference voltages. the outputs have been designed to operate over a wide range (2.8 v to 45 v) while still maintaining excellent dc characteristics. the cs8183 is protected from reverse battery, short circuit and thermal runaway conditions. the device also can withstand 45 v load dump transients and 50 v reverse polarity input voltage transients. this makes it suitable for use in automotive environments. the v ref /enable leads serve two purposes. they are used to provide the input voltage as a reference for the output and they also can be pulled low to place the device in sleep mode where it nominally draws less than 30 m a from the supply. features ? two regulated outputs 200 ma, 10 mv track worst case ? low dropout (0.35 v typ. @ 200 ma) ? low quiescent current ? independent thermal shutdown ? short circuit protection ? wide operating range ? internally fused leads in the so20l package http://onsemi.com a = assembly location wl, l = wafer lot yy, y = year ww, w = work week pin connections and marking diagram device package shipping ordering information so20l 37 units/rail so20l 1000 tape & reel so20l dwf suffix case 751d cs8183ydwf20 cs8183ydwfr20 1 cs8183 awlyyww 20 nc nc nc nc gnd gnd gnd gnd nc nc nc nc v in2 v out1 v out2 v in v ref /enable2 v adj1 v adj2 v ref /enable1 1 20
cs8183 http://onsemi.com 2 current limit & vsat sense + enable + esd esd esd independent thermal shutdown 2.0 v current limit & vsat sense + enable + esd esd esd independent thermal shutdown 2.0 v v out1 adj1 v ref /enable1 v out2 gnd adj2 v ref /enable2 v in1 v in2 figure 1. block diagram maximum ratings* rating value unit storage temperature 65 to 150 c supply voltage range (continuous) 15 to 45 v supply voltage range (normal, continuous) 3.4 to 45 v peak transient voltage (v in = 14 v, load dump transient = 31 v) 45 v voltage range (adj, v ref /enable, v out ) 10 to 45 v maximum junction temperature 150 c package thermal resistance: junctiontocase, r q jc junctiontoambient, r q ja 18 73 c/w c/w esd capability (human body model) 2.0 kv lead temperature soldering: reflow: (smd styles only) (note 1) 230 peak c 1. 60 second maximum above 183 c. *the maximum package power dissipation must be observed.
cs8183 http://onsemi.com 3 electrical characteristics (v in = 14 v; v ref /enable > 2.75 v; 40 c t j +125 c; c out 10 m f; 0.1 w < c out esr < 1.0 w @ 10 khz; unless otherwise stated.) parameter test conditions min typ max unit regular output 1, 2 v ref v out v out tracking error 4.5 v v in 26 v, 100 m a i out 200 ma, note 2 10 10 mv dropout voltage (v in v out ) i out = 100 m a i out = 200 ma 100 350 150 600 mv mv line regulation 4.5 v v in 26 v, note 2 10 mv load regulation 100 m a i out 200 ma, note 2 10 mv adj lead current loop in regulation 0.2 1.0 m a current limit v in = 14 v, v ref = 5.0 v, v out = 90% of v ref , note 2 225 700 ma quiescent current (i in i out ) v in = 12 v, i out = 200 ma v in = 12 v, i out = 100 m a v in = 12 v, v ref /enable = 0 v 15 75 30 25 150 55 ma m a m a reverse current v out = 5.0 v, v in = 0 v 0.2 1.5 ma ripple rejection f = 120 hz, iout = 200 ma, 4.5 v v in 26 v 60 db thermal shutdown 150 180 210 c v ref /enable 1, 2 enable voltage 0.80 2.00 2.75 v input bias current v ref /enable 1, 2 > 2.0 v 0.2 1.0 m a 2. v out connected to adj lead. package pin description package lead number so20l lead symbol function 1 v in1 input voltage for v out1 . 2 v out1 regulated output voltage 1. 3, 4, 7, 8, 13, 14, 17, 18 nc no connection. 5, 6, 15, 16 gnd ground (4 leads fused) 9 v adj1 adjust lead for v out1 . 10 v ref /enable1 reference voltage and enable input for v out1 . 11 v adj2 adjust lead for v out2 . 12 v ref /enable2 reference voltage and enable input for v out2 . 19 v in2 input voltage for v out2 . 20 v out2 regulated output voltage 2.
cs8183 http://onsemi.com 4 circuit description enable function by pulling the v ref /enable 1, 2 lead below 2.0 v typically, (see figure 5 or figure 6), the ic is disabled and enters a sleep state where the device draws less than 30 m a from supply. when the v ref /enable lead is greater than 2.75 v, v out tracks the v ref /enable lead normally. output voltage figures 2 through 7 only display one channel of the device for simplicity. the configurations shown apply for both channels. the outputs are capable of supplying 200 ma to the load while configured as a similiar (figure 2), lower (figure 4), or higher (figure 3) voltage as the reference lead. the adj lead acts as the inverting terminal of the op amp and the v ref lead as the noninverting. the device can also be configured as a highside driver as displayed in figure 7. figure 2. tracking regulator at the same voltage v in v out gnd gnd v ref / gnd gnd adj enable loads 5.0 v b+ c1* 1.0 m f c2** 10 m f v out , 200 ma v out v ref figure 3. tracking regulator at higher voltages v in v out gnd gnd v ref / gnd gnd adj enable loads v ref b+ c1* 1.0 m f c2** 10 m f v out , 200 ma r a r f v out v ref (1 r e r a ) figure 4. tracking regulator at lower voltages v in v out gnd gnd v ref / gnd gnd adj enable loads v ref b+ c1* 1.0 m f c2** 10 m f v out , 200 ma v out v ref ( r2 r1 r2 ) r2 r1 figure 5. tracking regulator with enable circuit v in v out gnd gnd v ref / gnd gnd adj enable from mcu v ref b+ c1* 1.0 m f c2** 10 m f v out , 200 ma r figure 6. alternative enable circuit v in v out gnd gnd v ref / gnd gnd adj enable v ref b+ c1* 1.0 m f c2** 10 m f v out , 200 ma from mcu 100 k figure 7. highside driver v in v out gnd gnd v ref / gnd gnd adj enable mcu b+ 200 ma v out b v sat ** c 2 is required for stability. * c 1 is required if the regulator is far from the power source filter.
cs8183 http://onsemi.com 5 application notes switched application the cs8183 has been designed for use in systems where the reference voltage on the v ref /enable pin is continuously on. typically, the current into the v ref /enable pin will be less than 1.0 m a when the voltage on the v in pin (usually the ignition line) has been switched out (v in can be at high impedance or at ground.) reference figure no tag. v out gnd gnd adj v in gnd gnd v ref / enable v out v ref 5.0 v v bat c1 1.0 m f ignition switch < 1.0 m a cs8183 figure 8. c2 10 m f external capacitors output capacitors for the cs8183 are required for stability. without them, the regulator outputs will oscillate. actual size and type may vary depending upon the application load and temperature range. capacitor effective series resistance (esr) is also a factor in the ic stability. worstcase is determined at the minimum ambient temperature and maximum load expected. the output capacitors can be increased in size to any desired value above the minimum. one possible purpose of this would be to maintain the output voltage during brief conditions of negative input transients that might be characteristic of a particular system. the capacitors must also be rated at all ambient temperatures expected in the system. to maintain regulator stability down to 40 c, a capacitor rated at that temperature must be used. more information on capacitor selection for smart regulator ? s is available in the smart regulator application note, acompensation for linear regulators.o calculating power dissipation in a dual output linear regulator the maximum power dissipation for a dual output regulator (figure 9) is: pd(max) { v in (max) v out1 (min) } i out1 (max) { v in (max) v out2 (min) } i out2 (max2) (1) v in (max)i q where: v in(max) is the maximum input voltage, v out1(min) is the minimum output voltage from v out1 , v out2(min) is the minimum output voltage from v out2 , i out1(max) is the maximum output current, for the application, i out2(max) is the maximum output current, for the application, i q is the quiescent current the regulator consumes at i out(max) . once the value of pd(max) is known, the maximum permissible value of r q ja can be calculated: r ja 150 c t a p d (2) the value of r q ja can then be compared with those in the package section of the data sheet. those packages with r q ja 's less than the calculated value in equation 2 will keep the die temperature below 150 c. in some cases, none of the packages will be sufficient to dissipate the heat generated by the ic, and an external heat sink will be required. figure 9. dual output regulator with key performance parameters labeled i in i out i q smart v out v in regulator control features heatsinks a heatsink effectively increases the surface area of the package to improve the flow of heat away from the ic and into the surrounding air. each material in the heat flow path between the ic and the outside environment will have a thermal resistance. like series electrical resistances, these resistances are summed to determine the value of r q ja: r ja r jc r cs r sa (3) where: r q jc = the junctiontocase thermal resistance, r q cs = the casetoheatsink thermal resistance, and r q sa = the heatsinktoambient thermal resistance. r q jc appears in the package section of the data sheet. like r q ja , it is a function of package type. r q cs and r q sa are functions of the package type, heatsink and the interface between them. these values appear in heat sink data sheets of heat sink manufacturers.
cs8183 http://onsemi.com 6 package dimensions so20l dwf suffix case 751d05 issue f 20 1 11 10 b 20x h 10x c l 18x a1 a seating plane h x 45 e d m 0.25 m b m 0.25 s a s b t e t b a dim min max millimeters a 2.35 2.65 a1 0.10 0.25 b 0.35 0.49 c 0.23 0.32 d 12.65 12.95 e 7.40 7.60 e 1.27 bsc h 10.05 10.55 h 0.25 0.75 l 0.50 0.90 0 7 notes: 1. dimensions are in millimeters. 2. interpret dimensions and tolerances per asme y14.5m, 1994. 3. dimensions d and e do not include mold protrusion. 4. maximum mold protrusion 0.15 per side. 5. dimension b does not include dambar protrusion. allowable protrusion shall be 0.13 total in excess of b dimension at maximum material condition.
cs8183 http://onsemi.com 7 notes
cs8183 http://onsemi.com 8 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. cs8183/d smart regulator is a registered trademark of semiconductor components industries, llc (scillc). literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com n. american technical support : 8002829855 toll free usa/canada
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