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? semiconductor components industries, llc, 2006 november, 2006 ? rev. 14 1 publication order number: ncp551/d ncp551, ncv551 150 ma cmos low iq low?dropout voltage regulator the ncp551 series of fixed output low dropout linear regulators are designed for handheld communication equipment and portable battery powered applications which require low quiescent. the ncp551 series features an ultra?low quiescent current of 4.0 a. each device contains a voltage reference unit, an error amplifier, a pmos power transistor, resistors for setting output voltage, current limit, and temperature limit protection circuits. the ncp551 has been designed to be used with low cost ceramic capacitors and requires a minimum output capacitor of 0.1 f. the device is housed in the micro?miniature tsop?5 surface mount package. standard voltage versions are 1.5, 1.8, 2.5, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, and 5.0 v. other voltages are available in 100 mv steps. features ? low quiescent current of 4.0 a typical ? maximum operating voltage of 12 v ? low output voltage option ? high accuracy output voltage of 2.0% ? industrial temperature range of ?40 c to 85 c (ncv551, t a = ?40 c to +125 c) ? ncv prefix for automotive and other applications requiring site and control changes ? pb?free packages are available typical applications ? battery powered instruments ? hand?held instruments ? camcorders and cameras figure 1. representative block diagram driver w/ current limit v in v out thermal shutdown enable gnd off on 1 3 5 2 see detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet. ordering information tsop?5 (sot23?5, sc59?5) sn suffix case 483 pin connections and marking diagram 1 3 n/c v in 2 gnd enable 4 v out 5 (top view) http://onsemi.com xxxayw xxx = specific device code a = assembly location y = year w = work week = pb?free package (note: microdot may be in either location) 1 5
ncp551, ncv551 http://onsemi.com 2 1 3 enable this input is used to place the device into low?power standby. when this input is pulled low, the device is disabled. if this function is not used, enable should be connected to v in . maximum ratings rating symbol value unit input voltage c operating ambient temperature ncp551 ncv551 t a ?40 to +85 ?40 to +125 c c 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. 1. this device series contains esd protection and exceeds the following tests: human body model 2000 v per mil?std?883, method 3015 machine model method 200 v 2. latchup capability (85 c) 100 ma dc with trigger voltage. thermal characteristics rating symbol test conditions typical value unit junction?to?ambient ja 1 oz copper thickness, 100 mm 2 c/w psij?lead 2 1 oz copper thickness, 100 mm 2 68 c/w note: single component mounted on an 80 x 80 x 1.5 mm fr4 pcb with stated copper head spreading area. using the following boundary conditions as stated in eia/jesd 51?1, 2, 3, 7, 12.
ncp551, ncv551 http://onsemi.com 3 electrical characteristics (v in = v out(nom.) + 1.0 v, v en = v in , c in = 1.0 f, c out = 1.0 f, t j = 25 c, unless otherwise noted.) characteristic symbol min typ max unit output voltage (t a = 25 c, i out = 10 ma) 1.5 v 1.8 v 2.5 v 2.7 v 2.8 v 2.9 v 3.0 v 3.1 v 3.2 v 3.3 v 5.0 v v out 1.455 1.746 2.425 2.646 2.744 2.842 2.940 3.038 3.136 3.234 4.90 1.5 1.8 2.5 2.7 2.8 2.9 3.0 3.1 3.2 3.3 5.0 1.545 1.854 2.575 2.754 2.856 2.958 3.060 3.162 3.264 3.366 5.10 v output voltage (t a = t low to t high , i out = 10 ma) 1.5 v 1.8 v 2.5 v 2.7 v 2.8 v 2.9 v 3.0 v 3.1 v 3.2 v 3.3 v 5.0 v v out 1.440 1.728 2.400 2.619 2.716 2.813 2.910 3.007 3.104 3.201 4.850 1.5 1.8 2.5 2.7 2.8 2.9 3.0 3.1 3.2 3.3 5.0 1.560 1.872 2.600 2.781 2.884 2.987 3.090 3.193 3.296 3.399 5.150 v line regulation (v in = v out + 1.0 v to 12 v, i out = 10 ma) reg line ? 10 30 mv load regulation (i out = 10 ma to 150 ma, v in = v out + 2.0 v) reg load ? 40 65 mv output current (v out = (v out at i out = 100 ma) ?3%) 1.5 v?2.0 v (v in = 4.0 v) 2.1 v?3.0 v (v in = 5.0 v) 3.1 v?4.0 v (v in = 6.0 v) 4.1 v?5.0 v (v in = 8.0 v) i o(nom.) 150 150 150 150 ? ? ? ? ? ? ? ? ma dropout voltage (i out = 10 ma, measured at v out ?3.0%) 1.5 v, 1.8 v, 2.5 v 2.7 v, 2.8 v, 2.9 v, 3.0 v, 3.1 v, 3.2 v, 3.3 v, 5.0 v v in ?v out ? ? 130 40 220 150 mv quiescent current (enable input = 0 v) (enable input = v in , i out = 1.0 ma to i o(nom.) ) i q ? ? 0.1 4.0 1.0 8.0 a output voltage temperature coefficient t c ? 100 ? ppm/ c enable input threshold voltage (voltage increasing, output turns on, logic high) (voltage decreasing, output turns off, logic low) v th(en) 1.3 ? ? ? ? 0.3 v output short circuit current (v out = 0 v) 1.5 v?2.0 v (v in = 4.0 v) 2.1 v?3.0 v (v in = 5.0 v) 3.1 v?4.0 v (v in = 6.0 v) 4.1 v?5.0 v (v in = 8.0 v) i out(max) 160 160 160 160 350 350 350 350 600 600 600 600 ma 3. maximum package power dissipation limits must be observed. pd t j(max) t a r ja 4. low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. 5. ncp551 t low = ?40 ct high = +85 c ncv551 t low = ?40 ct high = +125 c.
ncp551, ncv551 http://onsemi.com 4 definitions load regulation the change in output voltage for a change in output current at a constant temperature. dropout voltage the input/output differential at which the regulator output no longer maintains regulation against further reductions in input voltage. measured when the output drops 3% below its nominal. the junction tempera ture, load current, and minimum input supply requirements affect the dropout level. maximum power dissipation the maximum total dissipation for which the regulator will operate within its specifications. quiescent current the quiescent current is the current which flows through the ground when the ldo operates without a load on its output: internal ic operation, bias, etc. when the ldo becomes loaded, this term is called the ground current. it is actually the difference between the input current (measured through the ldo input pin) and the output current. line regulation the change in output voltage for a change in input voltage. the measurement is made under conditions of low dissipation or by using pulse technique such that the average chip temperature is not significantly affected. line transient response typical over and undershoot response when input voltage is excited with a given slope. thermal protection internal thermal shutdown circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. when activated at typically 160 c, the regulator turns off. this feature is provided to prevent failures from accidental overheating. maximum package power dissipation the maximum power package dissipation is the power dissipation level at which the junction temperature reaches its maximum operating value, i.e. 125 c. depending on the ambient power dissipation and thus the maximum available output current.
ncp551, ncv551 http://onsemi.com 5 0 3.25 75 50 25 ground current ( a) 3.05 figure 2. ground pin current versus output current 3.35 i out , output current (ma) 3.3 100 150 125 3.1 3.2 3.15 v out = 2.8 v figure 3. ground pin current versus output current 0 3.35 75 50 25 ground current ( a) 3.15 3.45 i out , output current (ma) 3.4 100 15 0 125 3.2 3.3 3.25 v out = 3.3 v 0.5 0 figure 4. ground pin current versus input voltage v in , input voltage (volts) figure 5. ground pin current versus input voltage ground pin current ( a) 08 6 4 21012 1 1.5 2 2.5 3 3.5 4 14 v out(nom) = 2.8 v i out = 25 ma 0.5 0 v in , input voltage (volts) ground pin current ( a) 08 6 4 21012 1 1.5 2 2.5 3 3.5 4 1 4 v out(nom) = 3.3 v i out = 25 ma 400 0 4 ?200 200 ?600 6 0 4 600 200 400 200 time ( s) figure 6. line transient response figure 7. line transient response 8 0 v in = 3.8 v to 4.8 v v out = 2.8 v c out = 1 f i out = 10 ma time ( s) ?200 0 400 6 800 1600 ?400 ?400 1200 1000 1400 output voltage deviation (mv) v in , input voltage (v) output voltage deviation (mv) v in , input voltage (v) 600 400 200 800 1 60 1200 1000 1400 v in = 3.8 v to 4.8 v v out = 2.8 v c out = 1 f i out = 100 ma
ncp551, ncv551 http://onsemi.com 6 400 0 4 ?200 200 ?600 6 0 4 600 200 400 200 time ( s) figure 8. line transient response figure 9. line transient response 0 time ( s) ?200 0 400 6 800 1600 ?400 ?400 1200 1000 1400 output voltage deviation (mv) v in , input voltage (v) output voltage deviation (mv) v in , input voltage (v) 600 400 200 800 160 0 1200 1000 1400 v in = 4.3 v to 5.3 v v out = 3.3 v c out = 1 f i out = 10 ma v in = 3.8 v to 4.8 v v out = 2.8 v c out = 1 f i out = 150 ma ?600 400 0 4 ?200 200 ?600 6 4 500 200 300 100 figure 10. line transient response figure 11. line transient response 0 time ( s) ?200 0 400 6 700 1900 ?400 ?400 1100 900 1700 output voltage deviation (mv) v in , input voltage (v) output voltage deviation (mv) v in , input voltage (v) 400 800 20 00 1200 v in = 4.3 v to 5.3 v v out = 3.3 v c out = 1 f i out = 150 ma v in = 4.3 v to 5.3 v v out = 3.3 v c out = 1 f i out = 100 ma ?600 600 800 1500 1300 time ( s) 600 1600 0 150 3 2 1 output voltage deviation (mv) ?1000 time (ms) figure 12. load transient response on figure 13. load transient response off i out = 3.0 ma ? 150 ma time (ms) ?500 0 0 456789 i out , output current (ma) 150 1000 ?500 0 0 500 output voltage deviation (mv) i out , output current (ma) 03 2 1 456789 v out = 2.8 v c out = 10 f v out = 2.8 v c out = 10 f i out = 3.0 ma ? 150 ma
ncp551, ncv551 http://onsemi.com 7 figure 14. load transient response off time (ms) figure 15. load transient response on time (ms) 150 ?500 500 0 150 ?500 ?1000 0 0 1000 03 2 1 456789 0 3 2 1 456789 output voltage deviation (mv) i out , output current (ma) output voltage deviation (mv) i out , output current (ma) v out = 3.3 v c out = 10 f v out = 3.3 v c out = 10 f i out = 3.0 ma ? 150 ma i out = 3.0 ma ? 150 ma 0 1 600 2 400 200 figure 16. turn?on response 3 v in = 4.3 v v out = 3.3 v r o = 3.3 k v en = 2.0 v time ( s) 0 1 3 2 800 2000 1200 1000 1400 v out , output voltage (v) enable voltage (v) 0 1600 1800 0 1 600 2 400 200 figure 17. turn?on response 3 v in = 3.8 v v out = 2.8 v r o = 2.8 k v en = 2.0 v time ( s) 0 1 3 2 800 200 0 1200 1000 1400 v out , output voltage (v) enable voltage (v) 0 1600 1800 c o = 1 f c o = 10 f c o = 1 f c o = 10 f figure 18. output voltage versus input voltage figure 19. output voltage versus input voltage 0 2 6 4 2 v out , output voltage (volts) 0 3 v in , input voltage (volts) 2.5 812 10 0.5 1.5 1 v in = 0 v to 12 v v out(nom) = 2.8 v i out = 10 ma c in = 1 f c out = 1 f v en = v in 0 2 6 4 2 v out , output voltage (volts) 0 3 v in , input voltage (volts) 2.5 81 2 10 0.5 1.5 1 v in = 0 v to 12 v v out = 3.3 v i out = 10 ma c in = 1 f c out = 1 f v en = v in 3.5
ncp551, ncv551 http://onsemi.com 8 applications information a typical application circuit for the ncp551 series is shown in figure 20. input decoupling (c1) a 0.1 f capacitor either ceramic or tantalum is recommended and should be connected close to the ncp551 package. higher values and lower esr will improve the overall line transient response. output decoupling (c2) the ncp551 is a stable regulator and does not require any specific equivalent series resistance (esr) or a minimum output current. capacitors exhibiting esrs ranging from a few m up to 3.0 can thus safely be used. the minimum decoupling value is 0.1 f and can be augmented to fulfill stringent load transient requirements. the regulator accepts ceramic chip capacitors as well as tantalum devices. larger values improve noise rejection and load regulation transient response. enable operation the enable pin will turn on or off the regulator. these limits of threshold are covered in the electrical specification section of this data sheet. if the enable is not used then the pin should be connected to v in . hints please be sure the v in and gnd lines are suf ficiently wide. when the impedance of these lines is high, there is a chance to pick up noise or cause the regulator to malfunction. set external components, especially the output capacitor, as close as possible to the circuit, and make leads as short as possible. thermal as power across the ncp551 increases, it might become necessary to provide some thermal relief. the maximum power dissipation supported by the device is dependent upon board design and layout. mounting pad configuration on the pcb, the board material, and also the ambient temperature effect the rate of temperature rise for the part. this is stating that when the ncp551 has good thermal conductivity through the pcb, the junction temperature will be relatively low with high power dissipation applications. the maximum dissipation the package can handle is given by: pd t j(max) t a r ja if junction temperature is not allowed above the maximum 125 c, then the ncp551 can dissipate up to 400 mw @ 25 c. the power dissipated by the ncp551 can be calculated from the following equation: p tot [ v in *i gnd (i out ) ] [ v in v out ] *i out or v inmax p tot v out * i out i gnd i out if a 150 ma output current is needed then the ground current from the data sheet is 4.0 a. for an ncp551sn30t1 (3.0 v), the maximum input voltage will then be 5.6 v. battery or unregulated voltage figure 20. typical application circuit v out c1 c2 off on + +
ncp551, ncv551 http://onsemi.com 9 output r 1 2 3 5 4 input 1.0 f 1.0 f outpu t 1 2 3 5 4 input 1.0 f 1.0 f q2 q1 r3 r1 r2 output 1 2 3 5 4 input 1.0 f 1.0 f output 1 2 3 5 4 enable 1.0 f 1.0 f c outpu t 1 2 3 5 4 input 1.0 f 1.0 f q1 r 11 v figure 21. current boost regulator figure 22. current boost regulator with short circuit limit figure 23. delayed turn?on figure 24. input voltages greater than 12 v the ncp551 series can be current boosted with a pnp transis- tor. resistor r in conjunction with v be of the pnp determines when the pass transistor begins conducting; this circuit is not short circuit proof. input/output differential voltage minimum is increased by v be of the pass resistor. short circuit current limit is essentially set by the v be of q2 and r1. i sc = ((v beq2 ? ib * r2) / r1) + i o(max) regulator if a delayed turn?on is needed during power up of several volt- ages then the above schematic can be used. resistor r, and capacitor c, will delay the turn?on of the bottom regulator. a regulated output can be achieved with input voltages that exceed the 12 v maximum rating of the ncp551 series with the addition of a simple pre?regulator circuit. care must be taken to prevent q1 from overheating when the regulated output (v out ) is shorted to gnd . q1 r ordering information device nominal output voltage marking package shipping ? ncp551sn15t1 1.5 lao tsop?5 3000 / tape & reel ncp551sn15t1g 1.5 lao tsop?5 (pb?free) 3000 / tape & reel ncp551sn18t1 1.8 lap tsop?5 3000 / tape & reel ncp551sn18t1g 1.8 lap tsop?5 (pb?free) 3000 / tape & reel ncp551sn25t1 2.5 laq tsop?5 3000 / tape & reel ncp551sn25t1g 2.5 laq tsop?5 (pb?free) 3000 / tape & reel ncp551sn27t1 2.7 lar tsop?5 3000 / tape & reel ncp551sn27t1g 2.7 lar tsop?5 (pb?free) 3000 / tape & reel note: additional voltages in 100 mv steps are available upon request by contacting your on semiconductor representative. ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packa ging specifi- cations brochure, brd8011/d. 6. ncv551 is qualified for automotive use.
ncp551, ncv551 http://onsemi.com 10 ordering information device shipping ? package marking nominal output voltage ncp551sn28t1 2.8 las tsop?5 3000 / tape & reel ncp551sn28t1g 2.8 las tsop?5 (pb?free) 3000 / tape & reel ncp551sn29t1g 2.9 ljl tsop?5 (pb?free) 3000 / tape & reel ncp551sn30t1 3.0 lat tsop?5 3000 / tape & reel ncp551sn30t1g 3.0 lat tsop?5 (pb?free) 3000 / tape & reel ncp551sn31t1g 3.1 ljm tsop?5 (pb?free) 3000 / tape & reel NCP551SN32T1G 3.2 liv tsop?5 (pb?free) 3000 / tape & reel ncp551sn33t1 3.3 lau tsop?5 3000 / tape & reel ncp551sn33t1g 3.3 lau tsop?5 (pb?free) 3000 / tape & reel ncp551sn50t1 5.0 lav tsop?5 3000 / tape & reel ncp551sn50t1g 5.0 lav tsop?5 (pb?free) 3000 / tape & reel ncv551sn15t1 1.5 lfz tsop?5 3000 / tape & reel ncv551sn15t1g 1.5 lfz tsop?5 (pb?free) 3000 / tape & reel ncv551sn18t1 1.8 lga tsop?5 3000 / tape & reel ncv551sn18t1g 1.8 lga tsop?5 (pb?free) 3000 / tape & reel ncv551sn25t1 2.5 lgb tsop?5 3000 / tape & reel ncv551sn25t1g 2.5 lgb tsop?5 (pb?free) 3000 / tape & reel ncv551sn27t1 2.7 lgc tsop?5 3000 / tape & reel ncv551sn27t1g 2.7 lgc tsop?5 (pb?free) 3000 / tape & reel ncv551sn28t1 2.8 lgd tsop?5 3000 / tape & reel ncv551sn28t1g 2.8 lgd tsop?5 (pb?free) 3000 / tape & reel ncv551sn30t1 3.0 lge tsop?5 3000 / tape & reel ncv551sn30t1g 3.0 lge tsop?5 (pb?free) 3000 / tape & reel ncv551sn31t1g 3.1 ljr tsop?5 (pb?free) 3000 / tape & reel ncv551sn32t1 3.2 lfr tsop?5 3000 / tape & reel ncv551sn32t1g 3.2 lfr tsop?5 (pb?free) 3000 / tape & reel ncv551sn33t1 3.3 lgg tsop?5 3000 / tape & reel ncv551sn33t1g 3.3 lgg tsop?5 (pb?free) 3000 / tape & reel ncv551sn50t1 5.0 lgf tsop?5 3000 / tape & reel ncv551sn50t1g 5.0 lgf tsop?5 (pb?free) 3000 / tape & reel note: additional voltages in 100 mv steps are available upon request by contacting your on semiconductor representative. ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packa ging specifi- cations brochure, brd8011/d. 6. ncv551 is qualified for automotive use.
ncp551, ncv551 http://onsemi.com 11 package dimensions tsop?5 case 483?02 issue f notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. maximum lead thickness includes lead finish thickness. minimum lead thickness is the minimum thickness of base material. 4. dimensions a and b do not include mold flash, protrusions, or gate burrs. 5. optional construction: an additional trimmed lead is allowed in this location. trimmed lead not to extend more than 0.2 from body. dim min max millimeters a 3.00 bsc b 1.50 bsc c 0.90 1.10 d 0.25 0.50 g 0.95 bsc h 0.01 0.10 j 0.10 0.26 k 0.20 0.60 l 1.25 1.55 m 0 10 s 2.50 3.00 123 54 s a g l b d h c j 0.7 0.028 1.0 0.039 mm inches scale 10:1 0.95 0.037 2.4 0.094 1.9 0.074 *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* 0.20 5x c ab t 0.10 2x 2x t 0.20 note 5 t seating plane 0.05 k m detail z detail z 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 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 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. 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 ncp551/d 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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