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? semiconductor components industries, llc, 2002 may, 2002 rev. 5 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 with an output voltage of 2.77 v and 3.0 v. it supplies 300 ma from 3.0 v to 6.0 v input. if wished, the aset'' pin enables to adjust the output voltage level that then depends on the voltage applied to this pin. 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 m 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 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 8 1 1 8 x = z for ncp260dm277 3 for ncp2860dm300 a = assembly location y = year w = work week marking diagram pin connections out in gnd out fault stdwn n.c. set device package shipping ordering information ncp2860dm277r2 micro8 4000 units/reel (top view) lcx ayw NCP2860DM300R2 micro8 4000 units/reel http://onsemi.com
ncp2860 http://onsemi.com 2 pin description pin name description 1, 4 out aout'' is the regulator output. a low esr, bypass capacitor should be connected for stable operation. 2 in ain'' is the supply input that is connected to the power source (up to 6.0 v). bypass with a 2.2 m f capacitor. 3 gnd ground 5 set ground the aset'' pin to set the output voltage to 2.77 v. refer to the aoutput voltage setting'' paragraph if you need to program another value. 6 n.c. this pin is nonconnected. 7 stdwn if the astdwn '' pin is low, the circuit enters the shutdown mode. 8 fault the afault '' 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 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 3 typical electrical characteristics* (v in = 3.6 v, set = gnd, t a from 25 c to +85 c, unless otherwise noted.) characteristic (2.7 v option) symbol min typ max unit output voltage @ i out = 100 m 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 cc0 355 700 m a supply current @ i out = 300 ma, v in = 3.2 v i cc300 1.1 ma supply current in shutdown mode (stdwn pin grounded) @ t a = 25 c i stdwn 0.01 1.0 m a dropout voltage @ i out = 1.0 ma (note 3) v drop1 0.6 mv dropout voltage @ i out = 150 ma (note 3) v drop150 75 150 mv dropout voltage @ i out = 300 ma (note 3) v drop300 150 250 mv set threshold (set = out) @ i out = 1.0 ma and v in = 3.6 v or 6.0 v, t a = 25 c t a from 25 c to +85 c v ref 1.226 1.220 1.244 1.244 1.262 1.270 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 = 3.2 v and v out = 2.2 v i max_cc 310 465 700 ma startup current limitation @ t a = 25 c, v in = 3.2 v and v out = 2.2 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 line regulation, v in varying between 3.0 v and 6.0 v @ i out = 1.0 ma and (set = out) line reg3 0.1 0.03 0.1 %/v line regulation, v in varying between 3.0 v and 6.0 v @ i out = 10 ma and (set = out) line reg4 0.1 0.03 0.1 %/v load regulation, i out varying from 0.1 ma to 300 ma, set = out, @ v in = 3.2 v load reg1 0.0002 %/ma load regulation, i out varying from 0.1 ma to 300 ma, set grounded, @ v in = 3.2 v load reg2 0.001 %/ma output voltage noise @ set = out, c out = 22 f (note 4) 10 hz f 10 khz 10 hz f 100 khz 15 35 v rms output voltage noise @ set = gnd, c out = 22 f (note 4) 10 hz f 10 khz 10 hz f 100 khz 35 60 v rms output voltage noise density @ set = gnd, c out = 22 m f, 10 hz f 100 khz (note 4) 400 nv(hz) 1/2 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 faultth 120 280 mv fault output low voltage @ i sink = 2.0 ma v faultout 0.15 0.4 v fault output off leakage current @ t a = 25 c i fault 0.1 100 na startup time @ c out = 10 f, v out = 2.7, i out = 100 ma (note 4) t stup 60 s thermal shutdown threshold t limit 170 c thermal shutdown hysteresis h temp 30 c *the specification gives the targeted values. this specification may have to be slightly adjusted after the temperature charact erization of the die. 3. 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 = 3.1 v. 4. refer to characterization curves for more details.
ncp2860 http://onsemi.com 4 typical electrical characteristics* (v in = 3.6 v, set = gnd, t a from 25 c to +85 c, unless otherwise noted.) characteristic (3.0 v option) symbol min typ max unit output voltage @ i out = 100 m a, 300 ma, v in = 3.6 v and t a = 25 c t a from 25 c to +85 c v out 2.96 2.93 3.0 3.0 3.04 3.07 v supply current @ i out = 0, v in = 3.6 v i cc0 355 700 a supply current @ i out = 300 ma, v in = 3.6 v i cc300 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 5) v drop1 0.6 mv dropout voltage @ i out = 150 ma (note 5) v drop150 65 150 mv dropout voltage @ i out = 300 ma (note 5) v drop300 150 250 mv set threshold (set = out) @ i out = 1.0 ma and v in = 3.6 v or 6.0 v, t a = 25 c t a from 25 c to +85 c v ref 1.226 1.220 1.244 1.244 1.262 1.270 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 = 3.6 v and v out = 2.6 v i max_cc 310 465 700 ma startup current limitation @ t a = 25 c, v in = 3.6 v and v out = 2.6 v i max_stup 220 ma line regulation, v in varying between 3.2 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 3.2 v and 6.0 v @ i out = 10 ma line reg2 0.1 0.01 0.1 %/v line regulation, v in varying between 3.2 v and 6.0 v @ i out = 1.0 ma and (set = out) line reg3 0.1 0.03 0.1 %/v line regulation, v in varying between 3.2 v and 6.0 v @ i out = 10 ma and (set = out) line reg4 0.1 0.03 0.1 %/v load regulation, i out varying from 0.1 ma to 300 ma, set = out, @ v in = 3.6 v load reg1 0.0002 %/ma load regulation, i out varying from 0.1 ma to 300 ma, set grounded, @ v in = 3.6 v load reg2 0.001 %/ma output voltage noise @ set = out, c out = 22 f (note 6) 10 hz f 10 khz 10 hz f 100 khz 15 35 v rms output voltage noise @ set = gnd, c out = 22 f (note 6) 10 hz f 10 khz 10 hz f 100 khz 35 60 v rms output voltage noise density @ set = gnd, c out = 22 f, 10 hz f 100 khz (note 6) 400 nv(hz) 1/2 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 faultth 170 280 mv fault output low voltage @ i sink = 2.0 ma v faultout 0.15 0.4 v fault output off leakage current @ t a = 25 c i fault 0.1 100 na startup time @ c out = 10 m f, v out = 3.0 v, i out = 100 ma (note 6) t stup 87 s thermal shutdown threshold t limit 150 c thermal shutdown hysteresis h temp 50 c *the specification gives the targeted values. this specification may have to be slightly adjusted after the temperature charact erization of the die. 5. 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 = 3.5 v. 6. refer to characterization curves for more details.
ncp2860 http://onsemi.com 5 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.) 180 160 120 140 100 80 0 200 100 250 50 150 0 0.0 0.4 0.2 0.6 0.2 1.2 0.4 300 0 0.00 60 output voltage (%) 0.80 temperature ( c) figure 1. normalized output voltage vs. load current figure 2. normalized output voltage vs. temperature output voltage (%) 0 1200 1000 160 120 80 800 600 0 40 200 240 figure 3. supply current vs. load current load current (ma) figure 4. no load supply current vs. input voltage input voltage (v) supply current ( m a) supply current ( m a) figure 5. dropout voltage vs. load current load current (ma) figure 6. fault detect threshold vs. load current load current (ma) dropout voltage (mv) fault detect threshold (mv) 0.80 0 200 150 100 50 250 300 40 17 100 0.00 3.45 4.30 2.60 1.75 5.15 0.90 6.00 100 400 200 0 500 600 0 200 250 150 100 50 300 v out normalized at i out = 0 t a = +85 c load current (ma) 0.40 0.40 300 0.8 120 240 180 1.0 7305377 i out = 200 ma i out = 100 ma i out = 0 ma v out normalized at 30 c, i out = 0 400 200 280 t a = 25 c t a = 40 c t a = 85 c t a = 25 c t a = 40 c t a = 85 c t a = 25 c t a = 40 c 60 40 20 fault = high fault = low v out = 2.77 v v out = 2.77 v v out = 2.77 v v out = 2.77 v
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.) 100 1000 10 10000 0.01 10 1 0.1 pssr (db) frequency (khz) figure 7. power supply rejection ratio figure 8. output noise spectral density noise (nv/sqrt hz) 0.01 0.10 1000 rms noise 10 hz to 100 khz: 59 m v rms v in = v out + 1 v c out = 22 m f i load = 10 ma v out = 2.77 v frequency (khz) 100 1000 1 10 100 v in = 3.26 v set = gnd i load = 10 ma v out = 2.77 v c out = 22 m f c out = 2.2 m 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 9. load transient response figure 10. line transient 30 60 90 0 80 70 40 50 20 10
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.) 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 11. powerdown response (i load = 100 ma) figure 12. powerup response (i load = 100 ma) figure 13. shutdown/powerup (v in = v out + 0.5 v, i load = 50 ma) figure 14. shutdown/powerup (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 8 4.0 3.0 2.0 1.0 0 4.0 3.0 2.0 1.0 0 20 40 60 80 100 120 140 160 180 200 ncp2860dm300 i out = 100 ma c out = 10 f c in = 2.2 f v in v out time ( s) voltage (v) fault voltage (v) figure 15. powerup response 0.5 10 15 20 25 30 35 40 45 50 0 4.0 3.0 2.0 1.0 0 4.0 3.0 2.0 1.0 0 v out fault voltage (v) figure 16. powerup response voltage (v) ncp2860dm300 i out = 100 ma c out = 2.2 f c in = 2.2 f v in time ( s) 4.0 3.0 2.0 1.0 0 4.0 3.0 2.0 1.0 0 5.0 10 15 20 25 30 35 40 45 50 figure 17. shutdown/powerup ncp2860dm300 i out = 50 ma c out = 2.2 f c in = 2.2 f v out , output voltage (v) stdwn voltage (v) 0 time ( s) v in =v out + 0.5 v
ncp2860 http://onsemi.com 9 detailed operating description internal pass transistor the ncp2860 incorporates a 0.5 w typical pchannel mosfet pass transistor. the pchannel 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, ain'' 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 startup 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 the output voltage is set to 2.77 v (or 3.0 v) if the aset'' pin is grounded. it can also be programmed to a different value. to do so, a portion of the output voltage must be applied to the aset'' pin. if a (r1, r2) resistors divider is used, then: 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 aset'' 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 aset'' pin leakage current. if the output voltage is directly applied to the aset'' 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 aout'' pin delivers the wished voltage. no compensation capacitor is required. fault detection circuitry the circuit detects when the inputoutput differential voltage is too low to ensure a correct load and line regulation at the output. the inputoutput 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 afault '' to ground. in normal operation, the afault '' terminal is an opendrainnchannel mosfet and if a pullup resistor is connected between aout'' and afault '', afault '' goes high. the pullup resistor is generally selected in the range of 100 k w 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 w 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 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 m f battery c2 2.2 m 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 m f battery c2 2.2 m f r1 r2 figure 18. with external output voltage adjustment figure 19. application for 2.77 v output voltage (5) set
ncp2860 http://onsemi.com 11 package dimensions micro8 dm suffix case 846a02 issue e s b m 0.08 (0.003) a s t dim min max min max inches millimeters a 2.90 3.10 0.114 0.122 b 2.90 3.10 0.114 0.122 c --- 1.10 --- 0.043 d 0.25 0.40 0.010 0.016 g 0.65 bsc 0.026 bsc h 0.05 0.15 0.002 0.006 j 0.13 0.23 0.005 0.009 k 4.75 5.05 0.187 0.199 l 0.40 0.70 0.016 0.028 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. b a d k g pin 1 id 8 pl 0.038 (0.0015) t seating plane c h j l
ncp2860 http://onsemi.com 12 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 any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and s pecifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo 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 parameters, including atypicalso 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 indem nify and hold scillc and its of ficers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and re asonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized u se, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employ er. publication ordering information japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. ncp2860/d micro8 is a trademark of international rectifier. literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com n. american technical support : 8002829855 toll free usa/canada

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