? semiconductor components industries, llc, 2016 january, 2016 ? rev. p0 1 publication order number: ncp146/d ncp146 product preview 300 ma cmos low dropout regulator the ncp146 is 300 ma ldo that provides the engineer with a very stable, accurate voltage with low noise suitable for space constrained, noise sensitive applications. in order to optimize performance for battery operated portable applications, the ncp146 employs the dynamic quiescent current adjustment for very low i q consumption at no?load. features ? operating input voltage range: 1.7 v to 5.5 v ? available in fixed voltage options: 1.8 v ? very low quiescent current of typ. 50 a ? low dropout: 280 mv typical at 300 ma ? 1% accuracy at room temperature ? high power supply ripple rejection: 75 db at 1 khz ? thermal shutdown and current limit protections ? stable with a 1 f ceramic output capacitor ? available in soic?8 package ? these devices are pb?free, halogen free/bfr free and are rohs compliant typical applicaitons ? pdas, mobile phones, gps, smartphones ? wireless handsets, wireless lan, bluetooth ? , zigbee ? ? portable medical equipment ? other battery powered applications figure 1. typical application schematic ncp146 in out gnd v out c out 1 f ceramic c in v in this document contains information on a product under development. on semiconductor reserves the right to change or discontinue this product without notice. marking diagram see detailed ordering, marking and shipping information on page 5 of this data sheet. ordering information pin connections www. onsemi.com in out gnd gnd gnd 1 2 3 5 8 (top view) 1 8 soic?8 case 751 xxxxx alyw 1 8 a = assembly location l = wafer lot y = year w = work week = pb?free package 4 7 6 n/c gnd n/c soic?8
ncp146 www. onsemi.com 2 in out bandgap reference mosfet driver with current limit thermal shutdown gnd auto low power mode figure 2. simplified schematic block diagram pin function description pin no. pin name description 1 out regulated output voltage pin. a small ceramic capacitor with minimum value of 1 f is needed from this pin to ground to assure stability. 2, 3, 6, 7 gnd power supply ground. 8 in input pin. a small capacitor is needed from this pin to ground to assure stability. 4, 5 n/c not connected. this pin can be tied to ground to improve thermal dissipation. absolute maximum ratings rating symbol value unit input voltage (note 1) v in ?0.3 v to 6 v v output voltage v out ?0.3 v to v in + 0.3 v or 6 v v output short circuit duration t sc s maximum junction temperature t j(max) 150 c storage temperature t stg ?55 to 150 c esd capability, human body model (note 2) esd hbm 2000 v esd capability, machine model (note 2) esd mm 200 v stresses exceeding those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality should not be assumed, damage may occur and reliability may be affected. 1. refer to electrical characteristics and application information for safe operating area. 2. this device series incorporates esd protection and is tested by the following methods: esd human body model tested per eia/jesd22?a114, esd machine model tested per eia/jesd22?a115, latchup current maximum rating tested per jedec standard: jesd78. thermal characteristics (note 3) rating symbol value unit thermal characteristics, soic?8 thermal resistance, junction?to?air r ja tbd c/w 3. single component mounted on 1 oz, fr 4 pcb with 645 mm 2 cu area.
ncp146 www. onsemi.com 3 electrical characteristics ?40 c t j 85 c; v in = 2.8 v, i out = 1 ma, c in = c out = 1 f. typical values are at t j = +25 c. min./max. are for t j = ?40 c and t j = +85 c respectively (note 4). parameter test conditions symbol min typ max unit operating input voltage v in 1.7 5.5 v output voltage accuracy ?40 c t j 85 c v out ?2 +3 % line regulation v out + 0.5 v v in 5.5 v reg line 0.01 0.1 %/v load regulation i out = 1 ma to 150 ma reg load 15 mv load regulation i out = 1 ma to 300 ma 30 load transient i out = 1 ma to 300 ma or 300 ma to 1 ma in 1 s, c out = 1 f tran load ?50/ +30 mv dropout voltage (note 5) i out = 300 ma v do 280 mv output current limit v out = 90% v out(nom) i cl 300 600 ma quiescent current i out = 0 ma i q 50 95 a power supply rejection ratio v in = 2.8 v, v out = 1.8 v i out = 150 ma f = 1 khz psrr 75 db output noise voltage v in = 2.8 v, v out = 1.8 v, i out = 150 ma f = 10 hz to 100 khz v n 70 v rms thermal shutdown temperature temperature increasing from t j = +25 c t sd 160 c thermal shutdown hysteresis temperature falling from t sd t sdh 20 c product parametric performance is indicated in the electrical characteristics for the listed test conditions, unless otherwise noted. product performance may not be indicated by the electrical characteristics if operated under different conditions. 4. performance guaranteed over the indicated operating temperature range by design and/or characterization. production tested at t j = t a = 25 c. low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible . 5. characterized when v out falls 100 mv below the regulated voltage at v in = v out(nom) + 1 v.
ncp146 www. onsemi.com 4 applications information general the ncp146 is a high performance 300 ma low dropout linear regulator. this device delivers very high psrr (over 75 db at 1 khz) and excellent dynamic performance as load/line transients. in connection with very low quiescent current this device is very suitable for various battery powered applications such as tablets, cellular phones, wireless and many others. the device is fully protected in case of output overload, output short circuit condition and overheating, assuring a very robust design. input capacitor selection (c in ) it is recommended to connect at least a 1 f ceramic x5r or x7r capacitor as close as possible to the in pin of the device. this capacitor will provide a low impedance path for unwanted ac signals or noise modulated onto constant input voltage. there is no requirement for the min. /max. esr of the input capacitor but it is recommended to use ceramic capacitors for their low esr and esl. a good input capacitor will limit the influence of input trace inductance and source resistance during sudden load current changes. larger input capacitor may be necessary if fast and large load transients are encountered in the application. output decoupling (c out ) the ncp146 requires an output capacitor connected as close as possible to the output pin of the regulator. the recommended capacitor value is 1 f and x7r or x5r dielectric due to its low capacitance variations over the specified temperature range. the ncp146 is designed to remain stable with minimum effective capacitance of 0.22 f to account for changes with temperature, dc bias and package size. especially for small package size capacitors such as 0402 the effective capacitance drops rapidly with the applied dc bias. there is no requirement for the minimum value of equivalent series resistance (esr) for the c out but the maximum value of esr should be less than 2 . larger output capacitors and lower esr could improve the load transient response or high frequency psrr. it is not recommended to use tantalum capacitors on the output due to their large esr. the equivalent series resistance of tantalum capacitors is also strongly dependent on the temperature, increasing at low temperature. output current limit output current is internally limited within the ic to a typical 600 ma. the ncp146 will source this amount of current measured with a voltage drops on the 90% of the nominal v out . if the output voltage is directly shorted to ground (v out = 0 v), the short circuit protection will limit the output current to 630 ma (typ). the current limit and short circuit protection will work properly over whole temperature range and also input voltage range. there is no limitation for the short circuit duration. thermal shutdown when the die temperature exceeds the thermal shutdown threshold (t sd ? 160 c typical), thermal shutdown event is detected and the device is disabled. the ic will remain in this state until the die temperature decreases below the thermal shutdown reset threshold (t sdu ? 140 c typical). once the ic temperature falls below the 140 c the ldo is enabled again. the thermal shutdown feature provides the protection from a catastrophic device failure due to accidental overheating. this protection is not intended to be used as a substitute for proper heat sinking. power dissipation as power dissipated in the ncp146 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 the ambient temperature affect the rate of junction temperature rise for the part. for reliable operation junction temperature should be limited to +125 c the maximum power dissipation the ncp146 can handle is given by: p d(max) 125 c t a ja (eq. 1) the power dissipated by the ncp146 for given application conditions can be calculated from the following equations: p d v in i gnd @i out i out v in v out (eq. 2) reverse current the pmos pass transistor has an inherent body diode which will be forward biased in the case that v out > v in . due to this fact in cases, where the extended reverse current condition can be anticipated the device may require additional external protection. power supply rejection ratio the ncp146 features very good power supply rejection ratio. if desired the psrr at higher frequencies in the range 100 khz ? 10 mhz can be tuned by the selection of c out capacitor and proper pcb layout. pcb layout recommendations to obtain good transient performance and good regulation characteristics place c in and c out capacitors close to the device pins and make the pcb traces wide. in order to minimize the solution size, use 0402 capacitors. larger copper area connected to the pins will also improve the device thermal resistance. the actual power dissipation can be calculated from the equation above (equation 2). expose pad should be tied the shortest path to the gnd pin.
ncp146 www. onsemi.com 5 ordering information device voltage option marking package shipping ? NCP146CD180R2G 1.8 v tbd soic?8 (pb?free) 3000 / tape & reel ?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.
ncp146 www. onsemi.com 6 package dimensions soic?8 nb case 751?07 issue ak 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. 6. 751?01 thru 751?06 are obsolete. new standard is 751?07. 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 1.52 0.060 7.0 0.275 0.6 0.024 1.270 0.050 4.0 0.155 mm inches scale 6:1 *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 the are registered trademarks of semiconductor components industries, llc (scillc) or its subsidia ries in the united states and/or other countries. scillc owns the rights to a number of pa tents, trademarks, copyrights, trade secret s, and other intellectual property. a listin g of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent?marking.pdf. scillc reserves the right to make changes without further notice to any product s herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any part icular purpose, nor does sci llc 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. ?typi cal? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating param eters, 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 right s of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgic al implant into the body, or other applications intended to s upport or sustain life, or for any other application in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer s hall indemnify and hold scillc and its officers , employees, subsidiaries, affiliates, and dist ributors 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 unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufac ture 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. p ublication 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?5817?1050 ncp146/d bluetooth is a registered trademark of bluetooth sig. zigbee is a registered trademark of zigbee alliance. literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 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 loc al sales representative
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