? semiconductor components industries, llc, 2016 may, 2016 ? rev. 3 1 publication order number: ncp706b/d ncp706b, ncp706ab 1 a, 1% precision very low dropout voltage regulator with enable the ncp706b/ab are a very low dropout regulators family which provides up to 1 a of load current and maintains excellent output voltage accuracy of 1% including line, load and temperature variations. the operating input voltage range from 2.4 v up to 5.5 v makes this device suitable for li?ion battery powered products as well as post?regulation applications. the product is available in 3.0 v fixed output voltage option. ncp706b/ab are fully protected against overheating and output short circuit and includes latched ocp protection which automatically latches?off the device in the case of a short circuit event and the ncp706ab has internal active discharge circuit. very small 8?pin xdfn8 1.6 x 1.2, 04p package makes the device especially suitable for space constrained portable applications such as tablets and smartphones. parts f eature active output discharge function. features ? operating input voltage range: 2.4 v to 5.5 v ? fixed output voltage option: 3.0 v other output voltage options available on request. ? low quiescent current of typ. 200 a ? very low dropout: 155 mv at i out = 1 a ? 1% accuracy over load/line/temperature ? high psrr: 58 db at 1 khz ? internal soft?start to limit the inrush current ? thermal shutdown and current limit protections ? stable with a 2.2 f ceramic output capacitor ? active output discharge (ncp706ab) ? available in xdfn8 1.6 x 1.2, 04p 8?pin package ? latched overcurrent protection ? these are pb?free devices typical applications ? tablets, smartphones, ? wireless handsets, portable media players ? portable medical equipment ? other battery powered applications figure 1. typical application schematic ncp706b/ab in en out gnd off on v out = 3.0 v @ 1 a c out 2.2 f ceramic c in v in = 2.4 (3.3) ? 5.5 v sns xdfn8 case 711as marking diagram www. onsemi.com see detailed ordering, marking and shipping information on page 9 of this data sheet. ordering information pin connection (top view) xx = specific device code m = date code = pb?free package xxm (note: microdot may be in either location) 1 2 3 4 1 2 3 4 8 7 6 5 8 7 6 5 in in en gnd out out n/c sns (bottom view) in in en gnd out out n/c sns
ncp706b, ncp706ab www. onsemi.com 2 figure 2. simplified internal schematic block diagram pin function description pin no. xdfn8 pin name description 1 out regulated output voltage. a minimum 2.2 f ceramic capacitor is needed from this pin to ground to assure stability. 2 out 3 n/c not connected. this pin can be tied to ground to improve thermal dissipation. 4 sns remote sense connection. this pin should be connected to the output voltage rail. 5 gnd power supply ground. 6 en enable pin. driving en over 0.9 v turns on the regulator. driving en below 0.4 v puts the regulator into shutdown mode. in case of the ncp706b/ab pulling the en low resets the ocp latch state. 7 in input pin. a small capacitor is needed from this pin to ground to assure stability. 8 in ? exposed pad this pad enhances thermal performance and is electrically connected to gnd. it is recommended that the exposed pad is connected to the ground plane on the board or otherwise left open.
ncp706b, ncp706ab www. onsemi.com 3 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 v enable input v en ?0.3 v to v in + 0.3 v v output short circuit duration t sc indefinite 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 latch?up current maximum rating tested per jedec standard: jesd78 thermal characteristics rating symbol value unit thermal characteristics, xdfn8 1.6x1.2, 04p thermal resistance, junction?to?air r ja 160 c/w
ncp706b, ncp706ab www. onsemi.com 4 electrical characteristics ? voltage version 3.0 v ?40 c t j 125 c; v in = v out(nom) + 0.3 v or 3.3 v, whichever is greater; i out = 10 ma, c in = c out = 2.2 f, v en = 0.9 v, unless otherwise noted. typical values are at t j = +25 c. (note 3) parameter test conditions symbol min typ max unit operating input voltage v in 2.4 5.5 v undervoltage lock?out v in rising, i out = 0 uvlo 1.2 1.6 1.9 v output voltage accuracy v out + 0.3 v v in 4.5 v, i out = 0 ? 1 a v out 2.97 3.0 3.03 v line regulation v out + 0.3 v v in 4.5 v, i out = 10 ma reg line 2 mv load regulation i out = 0 ma to 1 a, v in = 3.3 v reg load 2 mv load transient i out = 10 ma to 1 a in 10 s, v in = 3.5 v c out = 10 f tran load 120 mv dropout voltage (note 4) i out = 1 a, v out(nom) = 3.0 v v do 155 230 mv output current limit v out = 90% v out(nom) i cl 1.1 a quiescent current i out = 0 ma i q 170 230 a ground current i out = 1 a i gnd 200 a shutdown current v en = 0 v, v in = 2.0 to 5.5 v 0.1 1 a en pin high threshold en pin low threshold v en voltage increasing v en voltage decreasing v en_hi v en_lo 0.9 0.4 v en pin input current v en = 5.5 v i en 300 700 na overcurrent protection blanking time (note 5) v out = v out(nom) down to v out = 0v (output shorted to gnd) t blank 10 ms turn?on time c out = 2.2 f, from assertion en pin to 98% v out(nom) t on 150 s power supply rejection ratio v in = 3.5 v + 200 mvpp modulation, v out = 3.0 v i out = 0.5 a, c out = 4.7 f f = 100 hz f = 1 khz f = 10 khz psrr 65 58 52 db output noise voltage v out = 3.0 v, v in = 4.0 v, i out = 0.5 a f = 100 hz to 100 khz v noise 300 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 active output discharge (ncp706ab only) v en 0.4 v, v in = 4.5 v r dis 60 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. 3. 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 . 4. characterized when v out falls 90 mv below the regulated voltage at v in = 3.3 v, i out = 10 ma. 5. for more information see applications information section on page 8.
ncp706b, ncp706ab www. onsemi.com 5 typical characteristics figure 3. output voltage vs. temperature 2.992 2.994 2.996 2.998 3.000 3.002 3.004 ?40 ?20 0 20 40 60 80 100 120 temperature ( c) v in = 3.3 v i out = 10 ma c out = 2.2 f v out(nom) = 3.0 v output voltage (v) figure 4. output voltage vs. input voltage output voltage (v) 0.0 0.5 1.0 1.5 2.5 2.0 3.5 0.0 1.0 2.0 3.0 4.0 5.0 input voltage (v) i out = 10 ma i out = 50 ma i out = 250 ma i out = 500 ma v in = v en t a = 25 c c out = 2.2 f v out(nom) = 3.0 v 3.0 figure 5. quiescent current vs. input voltage 120 140 160 180 200 220 240 3.0 3.5 4.0 4.5 5.0 5.5 input voltage (v) quiescent current ( a) t a = 25 c t a = ?40 c t a = 125 c i out = 0 c out = 2.2 f v out(nom) = 3.0 v figure 6. ground current vs. output current 140 160 180 200 220 240 260 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 output current (a) ground current ( a) v in = 3.3 v v in = 4.0 v v in = 5.0 v v in = 3.5 v v in = 4.5 v v in = 5.5 v c out = 2.2 f t a = 25 c v out(nom) = 3.0 v figure 7. short current limitation vs. input voltage 1.2 1.3 1.4 1.5 1.6 1.7 1.8 3.0 3.5 4.0 4.5 5.0 5.5 input voltage (v) short current limit (a) v out = 0 v en = v in c out = 2.2 f t a = 25 c v out(nom) = 3.0 v figure 8. dropout voltage vs. output current 0 20 60 80 100 140 160 200 0 0.2 0.4 0.6 0.8 1 dropout voltage (mv) output current (a) v en = v in c out = 2.2 f v out(nom) = 3.0 v 25 c 125 c ?40 c 40 120 180
ncp706b, ncp706ab www. onsemi.com 6 typical characteristics 0.0 0.5 1.0 1.5 2.0 2.5 0.0 1.0 2.0 3.0 4.0 5.0 reverse leakage current in shutdown ( a) forced output voltage (v) figure 9. reverse leakage current in shutdown v out(nom) = 3.0 v v in = 5.5 v v en = 0 c in = c out = 4.7 f t a = 25 c figure 10. psrr vs. frequency & output capacitor 0 20 40 60 80 0.01 1 10 100 100 0 psrr (db) frequency (khz) c out = 2.2 f c out = 4.7 f c out = 10 f v in = 3.5 v + 200 mv pp modulation i out = 500 ma t a = 25 c 0.1 figure 11. psrr vs. frequency & output current 0.01 1 10 100 1000 i out = 10 ma i out = 100 ma i out = 500 ma psrr (db) frequency (khz) v in = 3.5 v + 200 mv pp modulation c out = 2.2 f t a = 25 c 0 20 40 60 80 figure 12. output noise density vs. frequency i out = 500 ma v in = 4.0 v t a = 25 c v out(nom) = 3.0 v c out = 2.2 f output noise density ( v/ hz ) frequency (khz) 0.0 0.5 1.0 1.5 2.0 3.5 0.01 0.1 1 10 100 1000 2.5 3.0 0.1
ncp706b, ncp706ab www. onsemi.com 7 typical characteristics figure 13. turn?on by coupled input and enable pins figure 14. turn?on by enable signal figure 15. line transient response figure 16. load transient response figure 17. turn?off by enable signal
ncp706b, ncp706ab www. onsemi.com 8 applications information input decoupling (cin) a 2.2 f capacitor either ceramic or tantalum is recommended and should be connected as close as possible to the pins of ncp706b device. higher values and lower esr will improve the overall line transient response. output decoupling (cout) the minimum decoupling value for NCP706BMX300TAG and ncp706abmx300tag devices is 2.2 f. the regulator accepts ceramic chip capacitors mlcc. if a tantalum capacitor is used, and its esr is large, the loop oscillation may result. larger values improve noise rejection and psrr. enable operation the enable pin en 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. if their impedance is high, noise pickup or unstable operation may result. set external components, especially the output capacitor, as close as possible to the circuit. the sense pin sns trace is recommended to be kept as far from noisy power traces as possible and as close to load as possible. thermal as power across the ncp706b/ab 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 affect the rate of temperature rise for the part. this is stating that when the ncp706b/ab has good thermal conductivity through the pcb, the junction temperature will be relatively low with high power dissipation. the power dissipation across the device can be roughly represented by the equation: p d v in v out *i out [w] (eq. 1) the maximum power dissipation depends on the thermal resistance of the case and circuit board, the temperature differential between the junction and ambient, pcb orientation and the rate of air flow. the maximum allowable power dissipation can be calculated using the following equation: p max t j t a ja [w] (eq. 2) where ( t j ? t a ) is the temperature differential between the junction and the surrounding environment and ja is the thermal resistance from the junction to the ambient. connecting the exposed pad and non connected pin 3 to a large ground pad or plane helps to conduct away heat and improves thermal relief. overcurrent latch operation the ncp706b/ab is equipped with latched overcurrent protection feature which will automatically disable the ldo in case of permanent output short circuit. initally during the ocp condition the current flowing from the input to the output of the ldo is typically 1.65 a. this current cause the die to heat?up and eventually when the temperature rises up to the thermal shutdown threshold the ldo becomes disabled. to resume the operation of the device it is necessary to toggle the en to ?off? state and than back to ?on? state again. figure 18. overcurrent latch operation output voltage enable voltage 1.2 v 3.0 v 600 ma 1.65 a output current 1.65 a 0 ma 0 ma 600 ma 3.0 v 0 v 0 v 0 v 0 v 0 v ttblank t 1.2 v
ncp706b, ncp706ab www. onsemi.com 9 ordering information device nominal ooutput voltage marking active discharge package shipping ? NCP706BMX300TAG 3.0 v l3 no xdfn8 (pb?free) 3000 / tape & reel ncp706abmx300tag 3.0 v ca yes ?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.
ncp706b, ncp706ab www. onsemi.com 10 package dimensions xdfn8 1.6x1.2, 0.4p case 711as issue d notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. coplanarity applies to the exposed pad as well as the terminals. a seating plane a1 dim a min nom millimeters 0.300 0.375 a1 0.000 0.025 b 0.130 0.180 d e l1 d2 pin one identifier 0.08 c 0.10 c a 0.10 c e b b 4 8 8x 1 5 0.05 c mounting footprint* e2 1.200 1.300 0.200 0.300 bottom view l 8x dimensions: millimeters 0.35 8x 0.26 8x 1.40 0.40 pitch *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. note 3 l 0.150 0.200 top view b side view recommended 0.44 a d e 8x e/2 e2 d2 1.44 package outline 1 detail b c detail a l1 detail a optional construction l ?? ?? 0.40 bsc 8x l1 8x 1.500 1.600 1.100 1.200 0.000 0.050 max 0.450 0.050 0.230 1.400 0.400 0.250 1.700 1.300 0.100 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 ncp706b/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 loc al sales representative
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