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? semiconductor components industries, llc, 2015 july, 2015 ? rev. 3 1 publication order number: ncp176/d ncp176 fast transient response low voltage 500 ma ldo the ncp176 is cmos ldo regulator featuring 500 ma output current. the input voltage is as low as 1.4 v and the output voltage can be set from 0.7 v. features ? operating input voltage range: 1.4 v to 5.5 v ? output voltage range: 0.7 to 3.6 v (0.1 v steps) ? quiescent current typ. 60 a ? low dropout: 130 mv typ. at 500 ma, v out = 2.5 v ? high output voltage accuracy 0.8% (v out > 1.8 v) ? stable with small 1 f ceramic capacitors ? over?current protection ? built?in soft start circuit to suppress inrush current ? thermal shutdown protection: 165 c ? with (ncp176a) and without (ncp176b) output discharge function ? available in xdfn6 1.2 mm x 1.2 mm x 0.4 mm package ? these are pb?free devices typical applications ? battery powered equipment ? portable communication equipment ? cameras, image sensors and camcorders figure 1. typical application schematic ncp176 in en out fb gnd c out 1 f c in 1 f off on v in v out ordering information pin connections xx = specific device code m = date code see detailed ordering and shipping information in the ordering information section on page 10 of this data sheet. www. onsemi.com xdfn6 mx suffix case 711at xx m xdfn6 (top view) marking diagram out fb gnd in n/c en gnd 1 2 3 6 5 4
ncp176 www. onsemi.com 2 figure 2. internal block diagram in en out gnd voltage reference and soft?start fb 0.7 v thermal shutdown voltage reference and soft?start 0.7 v thermal shutdown ncp176a (with output discharge) ncp176b (without output discharge) in en out gnd fb table 1. pin function description pin no. xdfn6 pin name description 1 out ldo output pin 2 fb feedback input pin 3 gnd ground pin 4 en chip enable input pin (active ?h?) 5 n/c not internally connected. this pin can be tied to the ground plane to improve thermal dissipation. 6 in power supply input pin epad epad it is recommended to connect the epad to gnd, but leaving it open is also acceptable table 2. absolute maximum ratings rating symbol value unit input voltage (note 1) in ?0.3 to 6.0 v output voltage out ?0.3 to v in + 0.3 v chip enable input en ?0.3 to 6.0 v output current i out internally limited ma 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 aec?q100?002 (eia/jesd22?a114) esd machine model tested per aec?q100?003 (eia/jesd22?a115) latchup current maximum rating tested per jedec standard: jesd78 table 3. thermal characteristics rating symbol value unit thermal resistance, junction?to?air, xdfn6 1.2 mm x 1.2 mm r ja 123 c/w
ncp176 www. onsemi.com 3 table 4. electrical characteristics v in = v out?nom + 1 v (v out?nom > 1.5 v) or v in = 2.5 v (v out?nom 1.5 v), v en = 1.2 v, i out = 1 ma, c in = c out = 1.0 f, t j = 25 c. the specifications in bold are guaranteed at ?40 c t j 85 c. parameter test conditions symbol min typ max unit input voltage v in 1.4 5.5 v output voltage t j = +25 c v out 1.8 v v out ?0.8 +0.8 % v out < 1.8 v ?18 +18 mv ?40 c t j 85 c v out 1.8 v ?1.5 +1.5 % v out < 1.8 v ?55 +50 mv line regulation v in = v out?nom + 0.5 v to 5.25 v v in 1.4 v linereg 0.02 0.1 %/v load regulation 1 ma i out 500 ma loadreg 1 5.0 mv dropout voltage (note 3) i out = 500 ma 1.4 v v out < 1.8 v v do 295 380 mv 1.8 v v out < 2.1 v 200 275 2.1 v v out < 2.5 v 160 230 2.5 v v out < 3.0 v 130 190 3.0 v v out < 3.6 v 110 165 quiescent current i out = 0 ma i q 60 90 a standby current v en = 0 v i stby 0.05 1 a output current limit v out = v out?nom ? 100 mv i out 500 ma short circuit current v out = 0 v i sc 550 750 ma enable threshold voltage en input voltage ?h? v enh 1.0 v en input voltage ?l? v enl 0.4 enable input current v en = v in = 5.5 v i en 0.15 0.6 a power supply rejection ratio f = 1 khz, ripple 0.2 vp?p, v in = v out?nom + 1.0 v, i out = 30 ma (v out 2.0v, v in = 3.0 v) psrr 75 db output noise f = 10 hz to 100 khz v out 1.8 v 20x v out?nom v rms v out < 1.8 v 40x v out?nom output discharge resistance (ncp176a option only) v in = 4.0 v, v en = 0 v, v out = v out?nom r actdis 60 thermal shutdown temperature temperature rising from t j = +25 c t sd 165 c thermal shutdown hysteresis temperature falling from t sd t sdh 20 c 3. measured when the output voltage falls ?3% below the nomi nal output voltage (voltage measured under the condition v in = v out?nom + 0.5v).
ncp176 www. onsemi.com 4 typical characteristics v in = v out?nom + 1 v (v out?nom > 1.5 v) or v in = 2.5 v (v out?nom 1.5 v), v en = 1.2 v, i out = 1 ma, c in = c out = 1.0 f, t j = 25 c. figure 3. output voltage vs. temperature figure 4. output voltage vs. temperature temperature ( c) temperature ( c) 80 60 40 20 0 ?20 ?40 1.145 1.155 1.165 1.195 1.205 1.225 1.235 1.255 80 60 40 20 0 ?20 ?40 1.773 1.779 1.791 1.797 1.803 1.827 figure 5. output voltage vs. temperature figure 6. line regulation vs. temperature temperature ( c) temperature ( c) 80 60 40 20 0 ?20 ?40 3.25 3.26 3.28 3.29 3.30 3.34 3.35 80 60 40 20 0 ?20 ?40 ?0.10 ?0.08 ?0.04 ?0.02 0 0.02 0.04 0.10 output voltage (v) output voltage (v) output voltage (v) line regulation (%/v) 1.175 1.185 1.215 1.245 v out?nom = 1.2 v v out?nom = 1.8 v 1.785 1.809 1.815 1.821 3.27 3.31 3.32 3.33 v out?nom = 3.3 v ?0.06 0.06 0.08 v in = v out?nom + 0.5 v to 5.25 v, v in 1.4 v v out?nom = 1.2 v v out?nom = 1.8 v v out?nom = 3.3 v figure 7. load regulation vs. temperature temperature ( c) 80 60 40 20 0 ?20 ?40 ?5 ?4 ?2 ?1 0 1 4 5 load regulation (mv) ?3 2 3 v out?nom = 1.2 v v out?nom = 1.8 v v out?nom = 3.3 v i out = 1 ma to 500 ma
ncp176 www. onsemi.com 5 typical characteristics v in = v out?nom + 1 v (v out?nom > 1.5 v) or v in = 2.5 v (v out?nom 1.5 v), v en = 1.2 v, i out = 1 ma, c in = c out = 1.0 f, t j = 25 c. figure 8. dropout voltage vs. output current figure 9. dropout voltage vs. output current output current (ma) temperature ( c) 500 400 300 200 100 0 0 25 50 125 150 200 225 275 80 60 40 20 0 ?20 ?40 0 25 75 100 150 275 figure 10. dropout voltage vs. output current figure 11. dropout voltage vs. temperature output current (ma) temperature ( c) 500 400 300 200 100 0 0 20 40 60 80 140 160 80 60 40 20 0 ?20 ?40 0 20 40 60 80 100 160 figure 12. quiescent current vs. temperature temperature ( c) 80 60 40 20 0 ?20 ?40 0 10 20 30 50 60 80 90 dropout voltage (mv) dropout voltage (mv) dropout voltage (mv) dropout voltage (mv) quiescent current ( a) 75 100 175 250 v out?nom = 1.8 v v out?nom = 1.8 v 50 175 200 225 100 120 120 140 v out?nom = 1.2 v v out?nom = 1.8 v v out?nom = 3.3 v i out = 0 ma 40 70 t j = 85 c t j = 25 c t j = ?40 c 125 250 v out?nom = 3.3 v t j = 85 c t j = 25 c t j = ?40 c v out?nom = 3.3 v i out = 10 ma i out = 100 ma i out = 250 ma i out = 500 ma i out = 10 ma i out = 100 ma i out = 250 ma i out = 500 ma
ncp176 www. onsemi.com 6 typical characteristics v in = v out?nom + 1 v (v out?nom > 1.5 v) or v in = 2.5 v (v out?nom 1.5 v), v en = 1.2 v, i out = 1 ma, c in = c out = 1.0 f, t j = 25 c. figure 13. standby current vs. temperature figure 14. quiescent current vs. input voltage temperature ( c) input voltage (v) 80 60 40 20 0 ?20 ?40 0 0.1 0.3 0.4 0.6 0.7 0.9 1.0 5.0 4.5 5.5 4.0 3.5 3.0 2.5 2.0 50 55 60 65 75 80 85 90 figure 15. ground current vs. output current figure 16. short circuit current vs. temperature output current (ma) temperature ( c) 500 400 300 200 100 0 0 50 100 150 200 250 300 80 60 40 20 0 ?20 ?40 500 550 650 700 800 850 900 1000 figure 17. output current limit vs. temperature figure 18. enable threshold voltage vs. temperature temperature ( c) temperature ( c) 80 60 40 20 0 ?20 ?40 500 550 650 700 800 850 950 1000 80 60 40 20 0 ?20 ?40 0.4 0.5 0.6 0.7 0.8 0.9 1.0 standby current ( a) quiescent current ( a) ground current ( a) short circuit current (ma) output current limit (ma) enable threshold voltage (v) v out?nom = 1.2 v v out?nom = 1.8 v v out?nom = 3.3 v 0.2 0.5 0.8 70 t j = 85 c t j = 25 c t j = ?40 c v out?nom = 1.8 v i out = 0 ma v out?nom = 1.8 v t j = 85 c t j = 25 c t j = ?40 c 600 750 950 v out?nom = 1.2 v v out?nom = 1.8 v v out?nom = 3.3 v v out?forced = 0 v 600 750 900 v out?forced = v out?nom ? 0.1 v v out?nom = 1.8 v v out?nom = 1.2 v v out?nom = 3.3 v v out?nom = 1.8 v off ?> on on ?> off v en = 0 v
ncp176 www. onsemi.com 7 typical characteristics v in = v out?nom + 1 v (v out?nom > 1.5 v) or v in = 2.5 v (v out?nom 1.5 v), v en = 1.2 v, i out = 1 ma, c in = c out = 1.0 f, t j = 25 c. figure 19. enable input current vs. temperature figure 20. output discharge resistance vs. temperature (ncp176a option only) temperature ( c) temperature ( c) 80 60 40 20 0 ?20 ?40 0 0.1 0.2 0.3 0.4 0.5 0.6 80 60 40 20 0 ?20 ?40 0 10 20 30 50 60 70 80 figure 21. power supply rejection ratio figure 22. output voltage noise spectral density frequency (hz) frequency (hz) 1m 100k 10k 1k 10m 100 10 0 10 20 40 50 60 70 90 1m 100k 10k 1k 100 10 0 1 2 3 4 5 6 figure 23. turn?on/off ? vin driven (slow) figure 24. turn?on ? vin driven (fast) 1 ms/div 50 s/div enable input current ( a) output discharge resistance ( ) psrr (db) output voltage noise (nv/ hz) 50 ma/div v out?nom = 1.8 v v in = 5.5 v v en = 5.5 v v out?nom = 1.8 v v in = 4.0 v v en = 0 v v out?forced = v out?nom 40 30 80 v out?nom = 1.8 v, v in = 3.0 v v out?nom = 3.3 v, v in = 4.3 v c out = 1 f x7r 0805 i out = 30 ma v out?nom = 1.8 v, v in = 2.8 v v out?nom = 3.3 v, v in = 4.3 v c out = 1 f x7r 0805 integral noise: 10 hz ? 100 khz: 54 vrms 10 hz ? 1 mhz: 62 vrms v out?nom = 3.3 v v out?nom = 3.3 v 1 v/div 1 v/div 100 ma/div i in v in v out i in v in v out
ncp176 www. onsemi.com 8 typical characteristics v in = v out?nom + 1 v (v out?nom > 1.5 v) or v in = 2.5 v (v out?nom 1.5 v), v en = 1.2 v, i out = 1 ma, c in = c out = 1.0 f, t j = 25 c. figure 25. turn?on/off ? en driven figure 26. line transient response 100 s/div 20 s/div figure 27. line transient response figure 28. load transient response 20 s/div 10 s/div figure 29. load transient response figure 30. ja and p d(max) vs. copper area 10 s/div pcb copper area (mm 2 ) 600 500 400 300 200 100 0 60 80 100 120 140 180 200 220 2 v/div 1 v/div ja , junction?to?ambient thermal resistance ( c/w) 160 0 0.2 0.4 0.6 0.8 1.2 1.6 1.0 p d(max) , maximum power dissipation (w) 200 ma/div 50 mv/div v out?nom = 3.3 v i in v in v out v en 50 ma/div 1 v/div 1 v/div v out?nom = 1.2 v 500 mv/div 10 mv/div v in v out 3.3 v 2.3 v 1.2 v t r = t f = 1 s v out?nom = 3.3 v v in v out 4.8 v 3.8 v 3.3 v t r = t f = 1 s 10 mv/div 500 mv/div 50 mv/div 200 ma/div 1 v/div v out?nom = 1.2 v v in = 2.2 v v in v out 500 ma 1.2 v t r = t f = 1 s i out 1 ma v out?nom = 3.3 v v in = 4.3 v v in v out 500 ma 1.2 v t r = t f = 1 s i out 1 ma p d(max) , 2 oz cu p d(max) , 1 oz cu ja , 1 oz cu ja , 2 oz cu 1.4
ncp176 www. onsemi.com 9 applications information general the ncp176 is a high performance 500 ma low dropout linear regulator (ldo) delivering excellent noise and dynamic performance. thanks to its adaptive ground current behavior the device consumes only 60 a of quiescent current (no?load condition). the regulator features low noise of 48 v rms , psrr of 75 db at 1 khz and very good line/load transient performance. such excellent dynamic parameters, small dropout voltage and small package size make the device an ideal choice for powering the precision noise sensitive circuitry in portable applications. a logic en input provides on/off control of the output voltage. when the en is low the device consumes as low as 50 na typ. from the in pin. the device is fully protected in case of output overload, output short circuit condition or overheating, assuring a very robust design. input capacitor selection (c in ) input capacitor connected as close as possible is necessary to ensure device stability. the x7r or x5r capacitor should be used for reliable performance over temperature range. the value of the input capacitor should be 1 f or greater for the best dynamic performance. this capacitor will provide a low impedance path for unwanted ac signals or noise modulated onto the input voltage. there is no requirement for the esr of the input capacitor but it is recommended to use ceramic capacitor for its low esr and esl. a good input capacitor will limit the influence of input trace inductance and source resistance during load current changes. output capacitor selection (c out ) the ldo requires an output capacitor connected as close as possible to the output and ground pins. the recommended capacitor value is 1 f, ceramic x7r or x5r type due to its low capacitance variations over the specified temperature range. the ldo is designed to remain stable with minimum effective capacitance of 0.8 f. when selecting the capacitor the changes with temperature, dc bias and package size needs to be taken into account. especially for small package size capacitors such as 0201 the effective capacitance drops rapidly with the applied dc bias voltage (refer the capacitor?s datasheet for details). 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 0.5 . larger capacitance and lower esr improves the load transient response and high frequency psrr. only ceramic capacitors are recommended, the other types like tantalum capacitors not due to their large esr. enable operation the ldo uses the en pin to enable/disable its operation and to deactivate/activate the output discharge function (a?version only). if the en pin voltage is < 0.4 v the device is disabled and the pass transistor is turned off so there is no current flow between the in and out pins. on a?version the active discharge transistor is active so the output voltage is pulled to gnd through 60 (typ.) resistor. if the en pin voltage is > 1.0 v the device is enabled and regulates the output voltage. the active discharge transistor is turned off. the en pin has internal pull?down current source with value of 150 na typ. which assures the device is turned off when the en pin is unconnected. in case when the en function isn? t required the en pin should be tied directly to in pin. output current limit output current is internally limited to a 750 ma typ. the ldo will source this current when the output voltage drops down from the nominal output voltage (test condition is v out?nom ? 100mv). if the output voltage is shorted to ground, the short circuit protection will limit the output current to 750 ma typ. the current limit and short circuit protection will work properly over the whole temperature and input voltage ranges. there is no limitation for the short circuit duration. thermal shutdown when the ldo?s die temperature exceeds the thermal shutdown threshold value the device is internally disabled. the ic will remain in this state until the die temperature decreases by value called thermal shutdown hysteresis. once the ic temperature falls this way the ldo is back enabled. the thermal shutdown feature provides the protection against overheating due to some application failure and it is not intended to be used as a normal working function. power dissipation power dissipation caused by voltage drop across the ldo and by the output current flowing through the device needs to be dissipated out from the chip. the maximum power dissipation is dependent on the pcb layout, number of used cu layers, cu layers thickness and the ambient temperature. the maximum power dissipation can be computed by following equation: p d(max) t j t a ja [w] (eq. 1) where (t j ? t a ) is the temperature difference between the junction and ambient temperatures and ja is the thermal resistance (dependent on the pcb as mentioned above).
ncp176 www. onsemi.com 10 the power dissipated by the ldo for given application conditions can be calculated by the next equation: p d v in i gnd v in v out i out [w] (eq. 2) where i gnd is the ldo?s ground current, dependent on the output load current. connecting the exposed pad and n/c pin to a large ground planes helps to dissipate the heat from the chip. the relation of ja and p d(max) to pcb copper area and cu layer thickness could be seen on the figure 30. reverse current the pmos pass transistor has an inherent body diode which will be forward biased in the case when 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 ldo features very high power supply rejection ratio. the psrr at higher frequencies (in the range above 100 khz) can be tuned by the selection of c out capacitor and proper pcb layout. a simple lc filter could be added to the ldo?s in pin for further psrr improvement. enable turn?on time the enable turn?on time is defined as the time from en assertion to the point in which v out will reach 98% of its nominal value. this time is dependent on various application conditions such as v out?nom , c out and t a . pcb layout recommendations to obtain good transient performance and good regulation characteristics place c in and c out capacitors as close as possible to the device pins and make the pcb traces wide. in order to minimize the solution size, use 0402 or 0201 capacitors size with appropriate effective capacitance. 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 (power dissipation section). exposed pad and n/c pin should be tied to the ground plane for good power dissipation. ordering information table part number voltage option marking option package shipping ? ncp176amx100tcg 1.0 v aa with output discharge xdfn6 (pb?free) 3000 / tape & reel ncp176amx120tcg 1.2 v ae ncp176amx180tcg 1.8 v af NCP176AMX300TCG 3.0 v ac ncp176amx330tcg 3.3 v ad ncp176bmx100tcg 1.0 v da without output discharge ncp176bmx120tcg 1.2 v de ncp176bmx180tcg 1.8 v df ncp176bmx300tcg 3.0 v dc ncp176bmx330tcg 3.3 v dd ?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.
ncp176 www. onsemi.com 11 package dimensions xdfn6 1.20x1.20, 0.40p case 711at issue a notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. dimension b applies to plated terminal and is measured between 0.15 and 0.25mm from terminal tips. 4. coplanarity applies to the pad as well as the terminals. a seating plane 0.05 c a a1 2x 2x 0.05 c dim a min max millimeters 0.30 0.45 a1 0.00 0.05 b 0.13 0.23 d e e l pin one reference 0.05 c 0.05 c note 3 l e b 3 6 6x 1 4 mounting footprint* 0.15 0.25 bottom view e2 dimensions: millimeters 0.35 6x 0.24 6x 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. e2 0.20 0.40 top view b side view note 4 recommended c 6x a m 0.10 b c package outline d2 0.84 1.04 l1 1.20 bsc 1.20 bsc 0.40 bsc 0.05 ref d2 1.08 0.40 d e detail a detail a ?? ?? 1 l1 6x 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 ncp176/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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