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? semiconductor components industries, llc, 2010 july, 2010 ? rev. 12 1 publication order number: ncp2860/d ncp2860 300 ma very low noise, low dropout linear regulator the ncp2860 is a low noise, low dropout linear regulator that is offered as a fixed output voltage regulator (2.77 v) and as an adjustable output regulator from 1.25 v to 5.80 v. it supplies 300 ma from a 3.0 v to 6.0 v input. the excellent performances that the ncp2860 features in terms of transient responses, psrr and noise, make it an ideal solution for audio applications (e.g., audio amplifier drivers). features ? high output current (300 ma max) ? low output voltage noise: 60 vrms ? low dropout (150 mv @ i out = 300 ma) ? thermal overload and short circuit protections ? very low consumption in shutdown mode (10 na) ? high power supply rejection ratio (60 db @ 1.0 khz) ? fault indicator ? programmable output voltage ? soft ? start ? pb ? free package is available typical applications ? cellular phone ? handheld instruments bandgap shutdown thermal sensor fault detect drive and current limiting feedback selection output buffer error amplifier ? + stdwn fault in gnd out rint1 rint2 set 8 7 6 5 1 2 3 4 micro8 dm suffix case 846a 1 xxx = specific device code a = assembly location y = year w = work week = pb ? free package marking diagram pin connections out in gnd out fault stdwn n.c. set (top view) http://onsemi.com xxx ayw 1 (note: microdot may be in either location) see detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet. ordering information
ncp2860 http://onsemi.com 2 bandgap bandgap shutdown thermal sensor fault detect drive and current limiting feedback selection output buffer error amplifier ? + stdwn fault in gnd out rint1 rint2 r3 100 k (3) (7) (2) (8) (1,4) c1 2.2 f battery c2 2.2 f shutdown thermal sensor fault detect drive and current limiting feedback selection output buffer error amplifier ? + stdwn fault in gnd out set rint1 rint2 r3 100 k (3) (7) (2) (8) (5) (1,4) c1 2.2 f battery c2 2.2 f r1 r2 figure 1. with external output voltage adjustment figure 2. application for 2.77 v output voltage (5) set
ncp2860 http://onsemi.com 3 pin description pin name description 1, 4 out ?out?? is the regulator output. a low esr, bypass capacitor should be connected for stable operation. 2 in ?in?? is the supply input that is connected to the power source (up to 6.0 v). bypass with a 2.2 f capacitor. 3 gnd ground 5 set ground the ?set?? pin to set the output voltage to 2.77 v. connect to resistor ? divider for adj output voltage. refer to the ?output voltage setting?? paragraph if you need to program another value. 6 n.c. this pin is non ? connected. 7 stdwn if the ?stdwn ?? pin is low, the circuit enters the shutdown mode. 8 fault the ?fault ?? terminal is a high impedance, open drain output. if the circuit is out of regulation, the voltage pin goes low. otherwise (normal operation or shutdown mode), this pin is high impedance. connect the pin to ground, if unused. maximum ratings rating symbol value unit input voltage, shutdown pin, voltage range (note 1) v inmax ? 0.3, +6.0 v thermal resistance (note 2) ? 230 c/w maximum junction temperature t jmax 150 c storage temperature range t smax ? 65 to +150 c lead temperature (soldering, 10s) t lmax 300 c esd capability human body model machine model ? ? 2.0 200 kv v latchup capability @ 85 c ? +/ ? 100 ma 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. the recommended input voltage range for ncp2860 proper operation is 2.7 v to 6.0 v. 2. circuit being mounted on a board that has no metal oxide traces attached to the leads. the addition of plated copper can lowe r the thermal resistance.
ncp2860 http://onsemi.com 4 typical electrical characteristics (note 3) (v in = 3.6 v, t a from ? 25 c to +85 c, unless otherwise noted.) characteristic for 2.77 v fix version set = gnd symbol min typ max unit output voltage @ i out = 100 a, 300 ma, v in = 3.2 v and t a = 25 c t a from ? 25 c to +85 c v out 2.73 2.70 2.77 2.77 2.81 2.84 v supply current @ i out = 0, v in = 3.2 v i cc ? 0 ? 355 700 a supply current @ i out = 300 ma, v in = 3.2 v i cc ? 300 ? 1.1 ? ma supply current in shutdown mode (stdwn pin grounded) @ t a = 25 c i stdwn ? 0.01 1.0 a dropout voltage @ i out = 1.0 ma (note 4) v drop ? 1 ? 0.6 ? mv dropout voltage @ i out = 150 ma (note 4) v drop ? 150 ? 75 150 mv dropout voltage @ i out = 300 ma (note 4) v drop ? 300 ? 150 250 mv set input leakage current @ v set = (0 ? 0.2) v and t a = 25 c i leak ? 10 200 na short circuit output current limitation @ v in = 3.2 v i max_cc 310 465 700 ma start ? up current limitation @ t a = 25 c, v in = 3.2 v i max_stup ? 220 ? ma line regulation, v in varying between 3.0 v and 6.0 v @ i out = 1.0 ma line reg1 ? 0.1 0.01 0.1 %/v line regulation, v in varying between 3.0 v and 6.0 v @ i out = 10 ma line reg2 ? 0.1 0.01 0.1 %/v load regulation, i out varying from 0.1 ma to 300 ma @ v in = 3.2 v load reg2 ? 0.001 ? %/ma output voltage noise @ c out = 22 f (note 5) 10 hz f 10 khz 10 hz f 100 khz ? ? ? 35 60 ? ? v rms power supply rejection ratio @ 1.0 khz and i out = 100 ma psrr ? 60 ? db shutdown threshold (with hysteresis) @ v in = 5.0 v v stdwn 0.63 ? 2.65 v shutdown pin bias current @ stdwn = in or gnd and t a = 25 c l stdwn ? ? 100 na fault detection voltage @ i out = 200 ma v fault ? th ? 120 280 mv fault output low voltage @ i sink = 2.0 ma v fault ? out ? 0.15 0.4 v fault output off leakage current @ t a = 25 c i fault ? 0.1 100 na start ? up time @ c out = 10 f, i out = 100 ma (note 5) t stup ? 60 ? s thermal shutdown threshold t limit ? 170 ? c thermal shutdown hysteresis h temp ? 30 ? c 3. the specification gives the targeted values. this specification may have to be slightly adjusted after the temperature charac terization of the die. 4. the dropout voltage is defined as (v in ? v out ) when v out is 100 mv below the value of v out when v in > 3 v. 5. refer to characterization curves for more details.
ncp2860 http://onsemi.com 5 typical electrical characteristics (note 3) (v in = 3.6 v, t a from ? 25 c to +85 c, unless otherwise noted.) characteristic for adjustable version symbol min typ max unit adjustable output voltage range @ v in = v out + 0.5 v and v in > 3 v, i out = (1 ? 300) ma v out 1.25 5.80 v supply current @ i out = 0, v in = 6 v, v out = 3.3 v i cc ? 0 400 900 ua supply current @ i out = 300, v in = 6 v, v out = 3.3 v i cc ? 300 ? 1180 1400 ua dropout voltage @ i out = 1.0 ma, v out = 3.3 v v drop ? 1 0.7 mv dropout voltage @ i out = 150 ma, v out = 3.3 v v drop ? 150 80 150 mv dropout voltage @ i out = 300 ma, v out = 3.3 v v drop ? 300 155 200 mv set threshold (set = out) @ i out = 1 ma and v in = (3.0 ? 6)v, t a = 25 c t a from ? 25 c to +85 c v ref 1.226 1.22 1.244 1.244 1.262 1.27 v set input leakage current @ v set = 1.25 v and t a = 25 c i leak 10 200 na short circuit output current limitation @ v in = v out + 0.5 v, v out = (2.5 ? 3.3) v, t a = 25 c i max_cc 310 495 700 ma start ? up current limitation @ t a = 25 c, v in = 3.8 v, v out = 3.3 v i max_stup 200 ma line regulation, v in = (3.8 ? 6) v @ i out = 1.0 ma and (v out = 3.3 v) line reg1 0.1 %/v line regulation, v in = (3.8 ? 6) v @ i out = 300 ma, v out = 3.3 v line reg300 ? 0.3 ? %/v load regulation, i out varying from 0.1 ma to 300 ma, v out = 3.3 v, @ v in = 3.8 v load reg3v3 0.001 %/ma load regulation, i out varying from 0.1 ma to 300 ma and v out = 2.5 v, v in = 3.0 v load reg2v5 ? 0.0005 ? %/ma output voltage noise @ set = gnd, c out = 22 f (note 5) 10 hz < f < 10 khz 10 hz < f < 100 khz adjustable ? 35 60 vrms power supply rejection ratio @ 1.0 khz, v out = 3.3 v and i out = 10 ma psrr 69 db shutdown threshold (with hysteresis) @ v in = 5.0 v v stdwn 0.63 2.65 v shutdown pin bias current @ stdwn = in or gnd and t a = 25 c i stdwn 100 na fault detection voltage @ i out = 200 ma v fault ? th 120 280 mv fault output low voltage @ i sink = 2.0 ma vf ault ? out 0.15 0.4 v fault output off leakage current @ t a = 25 c i fault 0.1 100 na start ? up time @ c out = 10 f, v out = 3.3 v, i out = 100 ma (note 5) t stup 80 s thermal shutdown threshold/hysteresis t limit / h temp 170/ 30 c 3. the specification gives the targeted values. this specification may have to be slightly adjusted after the temperature charac terization of the die. 4. the dropout voltage is defined as (v in ? v out ) when v out is 100 mv below the value of v out when v in > 3 v. 5. refer to characterization curves for more details.
ncp2860 http://onsemi.com 6 typical electrical characteristics (v in = v out + 0.5 v, c in = c out = 2.2 f, set = gnd, t a = 25 c, unless otherwise noted.) 0.0 ? 0.4 0.2 ? 0.6 ? 0.2 ? 1.2 0.4 300 0 0.0 0.05 normalized output voltage (%) ? 0.8 t a , temperature ( c) figure 1. normalized output voltage vs. load current figure 2. normalized output voltage vs. temperature 0 1400 1000 0.15 0.1 800 600 0 0.05 0.2 0.25 figure 3. supply current vs. load current load current (a) figure 4. no load supply current vs. input voltage input voltage (v) supply current ( a) supply current ( a) figure 5. dropout voltage vs. load current load current (a) dropout voltage (v) 0.8 ? 40 ? 20 100 04 3 25 16 100 400 200 0 500 600 v out normalized at i out = 0, t a = 25 c t a = +85 c load current (a) ? 0.4 0.4 0.3 ? 0.8 0.1 0.2 0.15 ? 1.0 0406080 i out = 200 ma i out = 100 ma i out = 0 ma v out normalized at t a = 30 c, i out = 0 400 200 0.3 t a = 25 c t a = ? 40 c t a = 85 c t a = 25 c t a = ? 40 c v in = 3.2 v v out = 2.77 v set = gnd c out = 2.2 f v out = 2.77 v set = gnd 0 0.04 0.08 0.12 0.16 0.2 0 0.05 0.10 0.15 0.20 0.25 0.30 t a = 85 c t a = 25 c t a = 0 c v out = 2.77 v t a = ? 25 c 0 0.04 0.08 0.12 0.16 0.2 0.00 0.05 0.10 0.15 0.20 0.25 0.30 dropout voltage (v) figure 6. dropout voltage vs. load current load current (a) t a = 85 c t a = 25 c t a = 0 c t a = ? 25 c v out = 3.3 v 0.25 ? 0.2 0.6 ? 0.6 0.2 normalized output voltage (%) 20 1200
ncp2860 http://onsemi.com 7 typical electrical characteristics (v in = v out + 0.5 v, c in = c out = 2.2 f, set = gnd, t a = 25 c, unless otherwise noted.) 200 100 250 50 150 0 figure 7. fault detect threshold vs. load current load current (ma) fault detect threshold (mv) 0 200 250 150 100 50 300 fault = high fault = low v out = 2.77 v 0 10 20 30 40 50 60 70 80 90 100 1000 10000 100000 pssr (db) figure 8. power supply rejection ratio frequency (hz) v in = 4.3 v v out = 3.3 v i load = 10 ma c out = 10 f c out = 2.2 f 100 1000 10 10000 pssr (db) frequency (khz) figure 9. power supply rejection ratio figure 10. output noise spectral density noise (nv/sqrt hz) 0.01 0.10 1000 rms noise 10 hz to 100 khz: 59 v rms v in = v out + 1 v c out = 22 f i load = 10 ma v out = 2.77 v frequency (hz) 1 10 100 v in = 3.6 v v out = 2.77 v i load = 10 ma set = gnd c out = 10 f c4 max 2.780 v c4 mean 2.7612 v c4 min 2.716 v v out (200 mv/div) 200 ma i load 0 ma v in 10 mv/div v out v in = v out + 200 mv i load = 200 ma 4.3 v 3.3 v figure 11. load transient response figure 12. line transient 0 10 20 30 40 50 60 70 80 100 1000 10000 100000 c out = 2.2 f
ncp2860 http://onsemi.com 8 typical electrical characteristics (v in = v out + 0.5 v, c in = c out = 2.2 f, set = gnd, t a = 25 c, unless otherwise noted.) c4 max 2.84 v c4 mean 1.496 v c4 min ? 40 mv stdwn (2 v/div) v out (1 v/div) c4 max 2.79 v c4 mean 712 mv c4 min ? 30 mv c4 max 2.77 v c4 mean 711 mv c4 min ? 30 mv v out (0.5 v/div) fault (2 v/div) v in (0.5 v/div) fault (2 v/div) v out (0.5 v/div) v in (0.5 v/div) figure 13. power ? down response (i load = 100 ma) figure 14. power ? up response (i load = 100 ma) figure 15. shutdown/power ? up (v in = v out + 0.5 v, i load = 50 ma) figure 16. shutdown/power ? up (v in = v out + 0.5 v, i load = 0 ma) c4 max 2.84 v c4 mean 1.374 v c4 min 0 v stdwn (2 v/div) v out (1 v/div) ncp2860dm277 ncp2860dm277 ncp2860dm277 ncp2860dm277
ncp2860 http://onsemi.com 9 detailed operating description internal pass transistor the ncp2860 incorporates a 0.5 typical p ? channel mosfet pass transistor. the p ? channel mosfet requires no drive current and then compared to the pnp based regulators, this solution drastically reduces the quiescent current and associated losses. shutdown block the circuit turns into shutdown mode when the shutdown pin is in low state. in this mode, the internal biasing current sources are disconnected so that the pass transistor is off and the consumption reduced to a minimum value. practically, the shutdown consumption is in the range of 10 na. when this function is unused, ?in?? is generally applied to the shutdown pin. current limitation the ncp2860 incorporates a short circuit protection that prevents the pass transistor current from exceeding 465 ma typically. the current limit is set to 220 ma during the start ? up phase. thermal protection the thermal protection protects the die against excessive overheating. practically, when the junction temperature exceeds 170 c for the 2.77 v option and 150 c for the 3.0 v option, an internal thermal sensor sends a logical signal to the shutdown block so that the circuit enters the shutdown mode. once the die has cooled enough (typically 30 c), the circuit enters a new working phase. output voltage setting a) the output voltage is set by internal resistor divider to 2.77 v for ncp2860dm277r2 device. the ?set? pin must be grounded or pulled below 0.2 v. b) the output voltage can also be programmed to a dif ferent value for NCP2860DMADJR2G device. in this case a portion of the output voltage acquired by the external resistor divider must be applied to the ?set? pin. do not leave the ?set? pin unconnected. if a (r1, r2) external resistors divider is used, then output voltage is given by equation: v out = (1 + r1/r2) * v ref therefore, as v ref typically equals 1.244 v: v out = 1.244 * (1 + r1/r2). now if r1 and r2 are high impedance resistors, the leakage current that is absorbed by the ?set?? pin, may have to be taken into account as follows: v out = [1.244 * (1 + r1/r2)] + (r1*i lk ) where i lk is the ?set?? pin leakage current. if the output voltage is directly applied to the ?set?? pin, v out = v ref = 1.244 v. out set ncp2860 r1 r2 v out regulation the circuit incorporates a transconductance error amplifier. the error amplifier output varies in response to load and input voltage variations to control the pass transistor current so that the ?out?? pin delivers the wished voltage. no compensation capacitor is required. fault detection circuitry the circuit detects when the input ? output differential voltage is too low to ensure a correct load and line regulation at the output. the input ? output differential threshold scales proportionally with the load current to be always just higher than the dropout. when the circuit detects a fault condition, an internal switch connects ?fault ?? to ground. in normal operation, the ?fault ?? terminal is an open ? drain ? n ? channel mosfet and if a pull ? up resistor is connected between ?out?? and ?fault ??, ?fault ?? goes high. the pullup resistor is generally selected in the range of 100 k to minimize the current consumption. application information it is recommended to use 2.2 f capacitors on the input and on the output of the ncp2860. capacitor type is not very critical. simply the esr should be lower than 0.5 to ensure a stable operation over the temperature and output current ranges. it could be convenient to increase the capacitor size and its quality (lower esr) only if it was necessary to further improve the noise performances, the power supply rejection ratio or the fast transient response.
ncp2860 http://onsemi.com 10 ordering information device output voltage (v) marking code package shipping ? ncp2860dm277r2g 2.77 lc2 micro8 (pb ? free) 4000 / tape & reel NCP2860DMADJR2G adjustable aaa micro8 (pb ? free) 4000 / 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.
ncp2860 http://onsemi.com 11 package dimensions micro8 case 846a ? 02 issue h s b m 0.08 (0.003) a s t notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.15 (0.006) per side. 4. dimension b does not include interlead flash or protrusion. interlead flash or protrusion shall not exceed 0.25 (0.010) per side. 5. 846a-01 obsolete, new standard 846a-02. b e pin 1 id 8 pl 0.038 (0.0015) ? t ? seating plane a a1 c l *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* 8x 8x 6x mm inches scale 8:1 1.04 0.041 0.38 0.015 5.28 0.208 4.24 0.167 3.20 0.126 0.65 0.0256 dim a min nom max min millimeters ?? ?? 1.10 ?? inches a1 0.05 0.08 0.15 0.002 b 0.25 0.33 0.40 0.010 c 0.13 0.18 0.23 0.005 d 2.90 3.00 3.10 0.114 e 2.90 3.00 3.10 0.114 e 0.65 bsc l 0.40 0.55 0.70 0.016 ?? 0.043 0.003 0.006 0.013 0.016 0.007 0.009 0.118 0.122 0.118 0.122 0.026 bsc 0.021 0.028 nom max 4.75 4.90 5.05 0.187 0.193 0.199 h e h e d d e 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, af filiates, 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. ncp2860/d the product described herein (ncp2860), may be covered by the following u.s. patents: 6,664,773; 6,791,390. there may be other patents pending. micro8 is a trademark of international rectifier. 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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