? semiconductor components industries, llc, 2007 october, 2007 - rev. 1 1 publication order number: NCP5666/d NCP5666 3.0 a, low dropout linear regulator with enable the NCP5666 is a high performance, low dropout linear regulator designed for high power applications that require up to 3.0 a current with enable. a thermally robust, 5 pin d 2 pak, combined with an architecture that offers low ground current (independent of load), provides for a superior high-current ldo solution. features ? 1% output voltage accuracy ? ultra-fast transient response (settling time: 1-3 s) ? low noise without bypass capacitor (57 v rms) ? low ground current independent of load (3.0 ma maximum) ? enable function ? current limit protection ? thermal protection ? power supply rejection ratio > 65 db ? stable with aluminum, tantalum and ceramic capacitors ? pin compatible with semtech device ? this is a pb-free device applications ? servers ? asic power supplies ? post regulation for power supplies ? constant current source ? networking equipment ? gaming and stb modules figure 1. typical application circuit NCP5666 v out v in en v out v in enable gnd c in *c out ** on off * c in - 4.7 f to 220 f recommended **cout - 2.2 f to 220 f recommended see more details in the application information section marking diagram http://onsemi.com see detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. ordering information d 2 pak case 936a 1 5 xx = voltage option = 25 = 2.5 v = 50 = 5.0 v a = assembly location wl = wafer lot y = year ww = work week g = pb-free 5666dsxx awlywwg tab = gnd pin 1. v in 2. en 3. gnd 4. nc 5. v out nc
NCP5666 http://onsemi.com 2 pin function description pin no. pin name description 1 v in positive power supply input voltage 2 en enable. this pin allows for on/off control of the regulator . to disable the device, connect to gnd. if this function is not in use, connect to v in . 3, tab gnd power supply ground 4 nc not connected. pcb runs allowable. 5 v out regulated output voltage figure 2. block diagram voltage reference block v ref = 0.9 v output stage r1 r2 v out v in cc gnd enable block r3 r4 en
NCP5666 http://onsemi.com 3 absolute maximum ratings rating symbol value unit input voltage (note 1) v in 18 vdc output pin voltage v out -0.3 to (v in + 0.3) v enable pin voltage v en -0.3 to (v in + 0.3) v maximum junction temperature t j(max) 150 c storage temperature range t stg -55 to +150 c moisture sensitivity level msl 1 - esd capability, human body model (note 2) esd hbm 2000 v esd capability, machine model (note 2) esd mm 200 v stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. thermal characteristics rating symbol value unit thermal characteristics (note 1) thermal resistance junction-to-ambient (note 3) thermal resistance junction-to-case r ja r jc 45 5.0 c/w operating ranges rating symbol value unit operating input voltage (note 1) v in (v out + v do ) to 9 v operating ambient temperature range t a -40 to +85 c 1. refer to electrical characteristics and application information for safe operating area. 2. this device series contains esd protection and exceeds the following tests: human body model (hbm) jesd 22-a114-b machine model (mm) jesd 22-a115-a. 3. as measured using a copper heat spreading area of 650 mm 2 , 1 oz copper thickness.
NCP5666 http://onsemi.com 4 electrical characteristics (v in = v out(nom) + 1.5 v, v en = v in , for typical values t a = 25 c, for min/max values t a = -40 c to 85 c, c in = 100 f, c out = 33 f, unless otherwise noted. (note 4)) characteristic symbol min typ max unit output voltage (note 6) 2.5 v regulator t a = 25 c (v in = 4.0 v to 7.0 v, i out = 10 ma to 3.0 a) t a = -20 to +125 c (v in = 4.0 v to 7.0 v, i out = 10 ma to 3.0 a) t a = -40 to +150 c (v in = 4.0 v to 7.0 v, i out = 10 ma to 3.0 a) 5.0 v regulator t a = 25 c (v in = 6.5 v to 7.0 v, i out = 10 ma to 3.0 a) t a = -20 to +125 c (v in = 6.5 v to 7.0 v, i out = 10 ma to 3.0 a) t a = -40 to +150 c (v in = 6.5 v to 7.0 v, i out = 10 ma to 3.0 a) v out 2.475 (-1%) 2.462 (-1.5%) 2.450 (-2%) 4.950 (-1%) 4.925 (-1.5%) 4.900 (-2%) 2.500 2.500 2.500 5.000 5.000 5.000 2.525 (+1%) 2.538 (+1.5%) 2.550 (+2%) 5.050 (+1%) 5.075 (+1.5%) 5.100 (+2%) v line regulation (i out = 10 ma, v out +1.5 v < v in < 7.0 v) (note 5) reg line - 0.03 - % load regulation (10 ma < i out < 3.0 a) (note 5) reg load - 0.2 - % dropout voltage (i out = 3.0 a) v do - 1.0 1.3 v peak output current limit i out 3.0 - - a internal current limitation (note 5) i lim - 4.5 - a ripple rejection (120 hz) (note 5) ripple rejection (1 khz) (note 5) rr - - 70 65 - - db output noise voltage (v out = 2.5 v, i out = 10 ma, c out = 1.0 f, f = 10 hz to 100 khz) (note 5) v n - 57 - v rms thermal shutdown (note 5) t shd - 160 - c ground current (i out = 3.0 a) 2.5 v regulator 5.0 v regulator i gnd - - 1.8 2.4 3.0 3.0 ma disable current 2.5 v regulator 5.0 v regulator i dis - - 50 10 300 300 a enable input threshold voltage voltage increasing, on state, logic high voltage decreasing, off state, logic low v en 1.3 - - - - 0.3 v enable input current (note 5) enable pin voltage = 0.3 v max enable pin voltage = 1.3 v min i en - - 0.5 0.5 - - a 4. performance guaranteed over specified operating conditions by design, guard banded test limits, and/or characterization, prod uction tested at t j = t a = 25 c. low duty cycle pulse techniques are used during testing to ma intain the junction temperature as close to ambient as possible . 5. typical values are based on design and/or characterization. 6. other fixed output voltages available at 0.9 v, 1.2 v, 1.5 v, 1.8 v, 3.0 v, 3.3 v per request.
NCP5666 http://onsemi.com 5 typical characteristics 0.0 0.2 0.4 0.6 0.8 1.0 1.4 0 0.5 1.0 1.5 2.0 2.5 3.0 i out , output current (a) v do , dropout voltage (v) 4.90 4.94 4.98 5.02 5.06 5.10 -50 -25 0 25 50 75 100 125 150 t a , ambient temperature ( c) v out , output voltage (v) 0.0 0.2 0.4 0.6 0.8 1.0 1.4 -50 -25 0 25 50 75 100 125 150 figure 1. dropout voltage vs. ambient temperature figure 2. dropout voltage vs. output current figure 3. output voltage vs. ambient temperature t a , ambient temperature ( c) v do , dropout voltage (v) i out = 3.0 a i out = 0.5 a i out = 10 ma 1.2 i out = 1.5 a 1.2 150 c 25 c -40 c 0 c 4.92 4.96 5.00 5.04 5.08 i out = 3.0 a 1.5 1.7 1.9 2.1 2.3 2.5 -50 -25 0 25 50 75 100 125 150 t a , ambient temperature ( c) i gnd , ground current (ma) 1.6 1.8 2.0 2.2 2.4 i out = 3.0 a v out(nom) = 5.0 v v out(nom) = 5.0 v 2.45 2.47 2.49 2.51 2.53 2.55 -50 -25 0 25 50 75 100 125 150 t a , ambient temperature ( c) v out , output voltage (v) figure 4. output voltage vs. ambient temperature i out = 10 ma 2.46 2.48 2.50 2.52 2.54 i out = 3.0 a 1.0 1.2 1.4 1.6 1.8 2.0 -50 -25 0 25 50 75 100 125 150 t a , ambient temperature ( c) i gnd , ground current (ma) 1.1 1.3 1.5 1.7 1.9 i out = 3.0 a figure 5. ground current vs. ambient temperature figure 6. ground current vs. ambient temperature v out(nom) = 2.5 v v out(nom) = 2.5 v
NCP5666 http://onsemi.com 6 typical characteristics figure 7. disable current vs. ambient temperature -50 -25 0 25 50 75 100 125 150 t a , ambient temperature ( c) i dis , disable current ( a) 70 60 50 40 30 20 10 0 v en = 0 v v out(nom) = 5.0 v figure 8. disable current vs. ambient temperature -50 -25 0 25 50 75 100 125 150 t a , ambient temperature ( c) i dis , disable current ( a) 70 60 50 40 30 20 10 0 v en = 0 v v out(nom) = 2.5 v -50 -25 0 25 50 75 100 125 150 t a , ambient temperature ( c) i sc , short circuit limit (a) 5.00 figure 9. short circuit current limit vs. ambient temperature 4.75 4.50 4.25 4.00 3.75 3.50 3.25 3.00 figure 10. output current vs. input-output voltage differential output current (a) input-output voltage differential (v) 1.2 1.0 0.8 0.6 0.4 0.2 0.0 t a = 25 c l = 25 mm copper 20 16 10 2 014 12 468 0 10 20 30 40 50 60 70 80 90 0 1.0 10 100 1000 i out = 1.0 a i out = 10 ma f, frequency (khz) rr, ripple rejection (db) c in = 100 nf c out = 1.0 f figure 11. ripple rejection vs. frequency 0.001 0.01 0.1 1.0 10 i out , output current (a) esr ( ) figure 12. output capacitor esr stability vs. output current 0.0 1.0 2.0 3.0 c out = 2.2 f unstable region 0.5 1.5 2.5 stable region c out = 22 f c out = 220 f
NCP5666 http://onsemi.com 7 typical characteristics figure 13. load transient response figure 14. load transient response time (1.0 s/div) time (1.0 s/div) figure 15. load transient response figure 16. load transient response time (100 ns/div) time (100 ns/div) figure 17. load transient response figure 18. load transient response time (400 ns/div) time (10 s/div) i out 1.0 a/div v out 20 mv/div i out 1.0 a/div v out 20 mv/div i out 1.0 a/div v out 50 mv/div i out 1.0 a/div v out 50 mv/div i out 1.0 a/div v out 50 mv/div i out 1.0 a/div v out 50 mv/div c out = 10 f i out = 3.0 a to 10 ma c out = 150 f i out = 10 ma to 3.0 a c out = 150 f i out = 3.0 a to 10 ma c out = 150 f i out = 10 ma to 3.0 a c out = 150 f i out = 3.0 a to 10 ma i out = 10 ma to 3.0 a c out = 10 f note: typical characteristics were measured with the same conditions as electrical characteristics, unless otherwise noted.
NCP5666 http://onsemi.com 8 application information the NCP5666 is a high performance low dropout 3.0 a linear regulator with enable suitable for high power applications. it is thermally robust and includes the safety features necessary during a fault condition, which provide for an attractive high current ldo solution for server, asic power supplies, networking equipment applications, and many others. input capacitor an input bypass capacitor is recommended to improve transient response or if the regulator is located more than a few inches from the power source. this will reduce the circuit's sensitivity to the input line impedance at high frequencies and significantly enhance the output transient response. different types and different sizes of input capacitors can be chosen dependent on the quality of power supply. the range of 4.7 f to 220 f should cover most of the applications. the higher the capacitance, the lower change of input voltage due to line and load transients. the bypass capacitor should be mounted with shortest possible lead or track length directly across the regulator's input terminals. output capacitor the output capacitor is required for stability. the NCP5666 remains stable with ceramic, tantalum, and aluminum electrolytic capacitors with a minimum value of 2.2 f. see figure 12 for stable region of esr for various output capacitors. the range of 2.2 f to 220 f should cover most of the applications. the higher the capacitance, the better load transient response. when a high value capacitor is used, a low value capacitor is also recommended to be put in parallel. the output capacitors should be placed as close as possible to the output pin of the device. this should help ensure ultrafast transient response times. current limit operation as the peak output current increases beyond its limitation, the device is internally clampled to 4.5 a, thus causing the output voltage to decrease and go out of regulation. this allows the device never to exceed the maximum power dissipation. input voltage operating range the NCP5666 is guaranteed to protect itself from self destruction due to excessive power dissipation by activating current limit and thermal shutdown protections. these destructive situations can happen during very fast startup with large output capacitors or when output is short circuited. as long as the input voltage is lower than maximum operating voltage (9 v), the maximum power dissipation is never exceeded. if input voltage is between maximum operating voltage (9 v) and absolute maximum voltage (18 v) power dissipation must never exceed limits specified in thermal consideration section for safety operation. to use the device over maximum operating voltage the slow startup, not large output capacitors and no short circuit is recommended to maintain. thermal consideration the maximum device power dissipation can be calculated by: p d t j(max) t a r ja the bipolar process employed for this ic is fully characterized and rated for reliable 18 v operation. to avoid damaging the part or degrading it's reliability, power dissipation transients should be limited to 30 w for d 2 pak. for open-circuit to short-circuit transient, pdtransient = vin(operating max) * isc ordering information device nominal output voltage package shipping ? NCP5666ds25r4g (note 7) 2.5 v d 2 pak (pb-free) 800 / tape & reel NCP5666ds50r4g (note 7) 5.0 v d 2 pak (pb-free) 800 / tape & reel 7. other fixed output voltages available at 0.9 v, 1.2 v, 1.5 v, 1.8 v, 3.0 v, 3.3 v per request. ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d.
NCP5666 http://onsemi.com 9 package dimensions d 2 pak 5 case 936a-02 issue d 5 ref a 123 k b s h d g c e m l p n r v u1 terminal 6 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. tab contour optional within dimensions a and k. 4. dimensions u and v establish a minimum mounting surface for terminal 6. 5. dimensions a and b do not include mold flash or gate protrusions. mold flash and gate protrusions not to exceed 0.025 (0.635) maximum. dim a min max min max millimeters 0.386 0.403 9.804 10.236 inches b 0.356 0.368 9.042 9.347 c 0.170 0.180 4.318 4.572 d 0.026 0.036 0.660 0.914 e 0.045 0.055 1.143 1.397 g 0.067 bsc 1.702 bsc h 0.539 0.579 13.691 14.707 k 0.050 ref 1.270 ref l 0.000 0.010 0.000 0.254 m 0.088 0.102 2.235 2.591 n 0.018 0.026 0.457 0.660 p 0.058 0.078 1.473 1.981 r 5 ref s 0.116 ref 2.946 ref u 0.200 min 5.080 min v 0.250 min 6.350 min 45 m 0.010 (0.254) t -t- optional chamfer 8.38 0.33 1.016 0.04 16.02 0.63 10.66 0.42 3.05 0.12 1.702 0.067 scale 3:1 mm inches v1 u u1 0.297 0.305 7.544 7.747 v1 0.038 0.046 0.965 1.168 *for additional information on our pb-free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y 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 wi thout limitation special, consequential or incidental damages. typical parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including typicals must be validated for each custom er 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 of ficers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized 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. this literature is subject to all applicable copyright laws and is not for resale in any manner. NCP5666/d the products described herein (NCP5666), may be covered by one or more of the following u.s. patents: 5,920,184; 5,834,926. the re may be other patents pending. publication ordering information n. american technical support : 800-282-9855 toll free ?usa/canada europe, middle east and africa technical support: ?phone: 421 33 790 2910 japan customer focus center ?phone: 81-3-5773-3850 literature fulfillment : ?literature distribution center for on semiconductor ?p.o. box 5163, denver, colorado 80217 usa ? phone : 303-675-2175 or 800-344-3860 toll free usa/canada ? fax : 303-675-2176 or 800-344-3867 toll free usa/canada ? email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative
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