? semiconductor components industries, llc, 2001 october, 2001 rev. 11 1 publication order number: cs9202/d cs9202 micropower 3.3 v, 100 ma low dropout linear regulator with nocap ? the cs9202 is a precision 3.3 v, 100 ma voltage regulator with low quiescent current (450 m a typ. @ 100 m a load). the 3.3 v output is accurate within 2% and supplies 100 ma of load current. the regulator is protected against reverse battery, short circuit, over voltage, and over temperature conditions. the device can withstand 74 v peak transients making it suitable for use in automotive environments. on's proprietary nocap solution is the first technology which allows the output to be stable without the use of an external capacitor. nocap is suitable for slow switching or steady loads. features ? nocap ? low quiescent current (450 ma typ. @ 100 m a load) ? 3.3 v, 2% output ? 100 ma output current capability ? fault protection 74 v peak transient voltage 15 v reverse voltage short circuit thermal shutdown overvoltage shutdown ? internally fused leads current source (circuit bias) voltage shutdown over nocap current limit sense thermal shutdown bandgap reference v out sense (1) gnd v in + error amplifier (1) contact factory for optional sense lead. figure 1. block diagram http://onsemi.com device package shipping ordering information cs9202ydf8 so8 95 units/rail cs9202ydfr8 2500 tape & reel so8 so8 df suffix case 751 1 8 nc nc 1 cs920 alyw2 8 gnd gnd gnd gnd v in v out pin connections and marking diagram a = assembly location wl, l = wafer lot yy, y = year ww, w = work week
cs9202 http://onsemi.com 2 maximum ratings* parameter value unit power dissipation internally limited input voltage (v in ): dc peak transient voltage (60 v load dump @ v in = 14 v) 15 to 36 74 v v output current internally limited esd susceptibility (human body model) 4.0 kv package thermal resistance: junctiontocase, r q jc junctiontoambient, r q ja 25 110 c/w c/w junction temperature 40 to +150 c storage temperature 55 to +150 c 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. electrical characteristics (4.5 v v in 26 v, i out = 1.0 ma, 40 c t j 125 c; unless otherwise stated.) parameter test conditions min typ max unit output stage output voltage, v out 9.0 v < v in < 16 v, 100 ua i out 100 ma 4.5 v < v in < 26 v, 100 ua i out 100 ma 3.234 3.201 3.300 3.300 3.366 3.399 v v load regulation v in = 14 v, 100 m a i out 100 ma 5 50 mv line regulation 4.5 v < v < 26 v, i out = 1.0 ma 5 50 mv quiescent current, (i q ) i out = 100 m a, v in = 12 v i out 50 ma i out 100 ma 450 4 12 750 6 20 m a ma ma ripple rejection 7.0 v vi n 17 v, i out = 100 ma, f = 120 hz 60 75 db current limit 105 200 ma short circuit output current v out = 0 v 25 125 ma thermal shutdown (note 2) 150 180 c overvoltage shutdown v out 1.0 v 28 32 36 v 2. this parameter is guaranteed by design, but not parametrically tested in production. package lead description package lead number so8 lead symbol function 1 v out 3.3 v, 2%, 100 ma output. 2, 3, 6, 7 gnd ground. 4, 5 nc no connection. 8 v in input voltage.
cs9202 http://onsemi.com 3 typical performance characteristics figure 2. load regulation vs. output current v in = 14 v output current (ma) load regulation (mv) 14 100 figure 3. output voltage vs. temperature v in = 14 v temperature ( c) output voltage (v) 3.320 140 12 10 8 6 4 2 0 2 90 80 70 60 50 40 30 20 10 0 40 c 125 c 25 c 3.315 3.310 3.305 3.300 3.295 3.290 3.285 3.280 120 100 80 60 40 20 0 20 40 20 ma 100 ma 100 m a figure 4. line regulation vs. input voltage i out = 100 m a input voltage (v) line regulation (mv) 8 26 figure 5. quiescent current vs. output current (lightly loaded) v in = 14 v output current (ma) quiescent current (ma) 1 10 6 4 2 0 2 4 6 8 24 22 20 18 16 14 12 10 8 6 0.9 0.8 0.7 0.6 0.5 0.4 0.3 9 8 7 6 5 4 3 2 1 0 125 c 25 c 40 c 40 c 25 c 125 c figure 6. quiescent current vs. output current v in = 14 v output current (ma) quiescent current (ma) 12 100 figure 7. quiescent current vs. input voltage i out = 100 m a input voltage (v) quiescent current (ma) 0.70 26 90 80 70 60 50 40 30 20 10 0 10 8 6 4 2 0 40 c 25 c 125 c 0.65 0.60 0.55 0.50 0.45 0.40 0.35 0.30 24 22 20 18 16 14 12 10 8 6 4 125 c 25 c 40 c
cs9202 http://onsemi.com 4 circuit description voltage reference and output circuitry output stage protection the output stage is protected against overvoltage, short circuit and thermal runaway conditions (figure 8). if the input voltage rises above 32 v (typ), the output shuts down. this response protects the internal circuitry and enables the ic to survive unexpected voltage transients. should the junction temperature of the power device exceed 180 c (typ) the power transistor is turned off. thermal shutdown is an effective means to prevent die overheating since the power transistor is the principle heat source in the ic. figure 8. typical circuit waveforms for output stage protection load dump short circuit thermal shutdown v in v out i out > 32 v gnd v in v out cs9202 c 1 * 0.1 m f * c1 is required if regulator is distant from power source filter. figure 9. application and test diagram application notes stability considerations / nocap normally a low dropout or quasilow dropout regulator (or any type requiring a slow lateral pnp in the control loop) necessitates a large external compensation capacitor at the output of the ic. the external capacitor is also used to curtail offshoot, determine startup delay time and load transient response. traditional ldo regulators typically have low unity gain bandwidth, display overshoot and poor ripple rejection. compensation is also an issue and depends on the external capacitor value, esr (equivalent series resistance) and board layout parasitics that all can create oscillations if not properly accounted for. nocap is an on semiconductor exclusive output stage which internally compensates the ldo regulator over temperature, load and line variations without the need for an expensive external capacitor nocap is ideally suited for slow switching or steady loads. if the load is characterized by transient current events, an output storage capacitor may be needed. if this is the case, the capacitor should be no larger than 100 nf. with loads that require greater transient suppression, a regulator with a traditional output stage (such as the cs8221) may be better suited for proper operation.
cs9202 http://onsemi.com 5 calculating power dissipation in a single output linear regulator the maximum power dissipation for a single output regulator (figure 10) is: p d(max) { v in(max) v out(min) } i out(max) v in(max) i q (1) where: v in(max) is the maximum input voltage, v out(min) is the minimum output voltage, i out(max) is the maximum output current for the application, and i q is the quiescent current the regulator consumes at i out(max) . once the value of p d(max) is known, the maximum permissible value of r q ja can be calculated: r ja 150 c t a p d (2) figure 10. single output regulator with key performance parameters labeled. i in i out i q cs9202 v out v in 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 heatsink will be required. heat sinks a heat sink 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 too 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.
cs9202 http://onsemi.com 6 package dimensions so8 df suffix case 75107 issue w seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 x y g m y m 0.25 (0.010) z y m 0.25 (0.010) z s x s m
cs9202 http://onsemi.com 7 notes
cs9202 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. cs9202/d nocap is a trademark of on semiconductor, and is patented. 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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