www.addmtek.com copyright ? 2006 addtek corp. 1 dd055_a -- june 2006 amc76386 dual 450ma ldo r egulator description features the amc76386 series is a low dropout regulator rated for 450ma output current. low power consumption and high accuracy is achieved through cmos technology and internal trimmed reference voltage. the amc76386 series consists of a high- p recision voltage reference, error correction circuit, and a current limit output driver. the fast transient response is an outstanding feature for applications with various loads. ? 2% internally trimmed output ? output current is excess of 450ma ? input-output different ial of typ. 360mv ? at 300ma & low quiescent current of 10 a typical ? p-mos output stage with low rdson. ? short circuit protection ? internal thermal overload protection ? available in sop-8 package typical application circuit applications ? cd rom, dvd ? wireless communication systems ? digital camera ? battery powered applications package pin out v out1 c out 4.7 f c in 1 f v in1 amc76386 v out2 c out 4.7 f c in 1 f v in2 2.5v 3.3v order information plastic sop-8 t a ( o c) dm 8- p in -40 to 85 AMC76386-DMF (lead free) note: 1.all surface-mount packages are available in tape & reel. append the lette r ?t? to part number (i.e. amc76386dmft). 2.the letter ?f? is marked for lead free process. 8-pin plastic sop-8 surface mount ( to p view ) vout1 vin1 vout2 vin2 gnd gnd2 gnd gnd
amc76386 copyright ? 2006 addtek corp. 2 dd055_a -- june 2006 absolute maximum ratings input voltage, v in1, v in2 13v maximum operating junction temperature, t j 150 o c storage temperature range -65 o c to 150 o c lead temperature (soldering, 10 seconds) 260 o c note: exceeding these ratings could cause damage to th e device. all voltages are with respect to ground. currents are positive into, negative out of the specified terminal. power dissipation table package ja ( o c/ w ) derating factor (mw/ o c ) t a 25 o c t a 25 o c power rating (mw) t a =70 o c power rating (mw) dm 165(note) 6 757 487 note: t j = t a + (p d ja ) p d : total power dissipation. ja : thermal resistance from junction to ambient. the ja numbers are guidelines for the thermal perf ormance of the device/pc-board system. all of the above assume no ambient airflow. block diagram gnd v in1 v out1 current limiter v ref gnd v in2 v out2 current limiter v ref
amc76386 copyright ? 2006 addtek corp. 3 dd055_a -- june 2006 recommended operating conditions recommended operating conditions parameter symbol min. typ. max. units input voltage v in 3.0 10 v load current (with adequate heat sinking) i o 5 450 ma input capacitor (v in to gnd) 0.1 f output capacitor with esr of 10 ? max., (v out to gnd) 1.0 f operating ambient temperature range t a -40 85 o c operating junction temperature t j 125 o c electrical characteristics unless otherwise specified, v in = v out(typ) + 1v, i o = 10ma, c out = 4.7 f, t a =25 o c, and are for dc characteristics only. (low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) amc76386 parameter symbol test conditions min typ max units v out1 2.450 2.500 2.550 output voltage v out2 v o i o = 10ma 3.234 3.300 3.366 v line regulation ? v oi v in = (v out + 0.5v) to 8v 0.1 0.3 %/v 10ma i o 100ma 15 30 10ma i o 300ma 45 80 load regulation ? v ol 10ma i o 450ma 95 140 mv i o = 100ma 120 180 i o = 300ma 360 540 dropout voltage ? v i o = 450ma 540 810 mv ground pin current i q i o = 10ma~450ma 8 20 a current limit i cl v in = v out + 0.5v 450 ma output voltage temperature coefficient i o =100ma, -40 o c t j 125 o c 100 ppm/ o c
amc76386 copyright ? 2006 addtek corp. 4 dd055_a -- june 2006 characterization curves typical performance characteristics (v in =5v c in =1f c out =4.7f t a =25 o c unless otherwise specified.) 0 0.1 0.2 0.3 0.4 0.5 0.6 0 100 200 300 400 500 i o (ma) dropout vs. load current dropout voltage (v) 3 3.1 3.2 3.3 3.4 3.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 v o (v) v in (v) line regulation v out2 =3.3v current limit (a) 0 0.4 0.8 1.2 1.6 2 45678910 v in (v) current limit vs. su pp l y volta g e 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 -40-20020406080100120 io=100ma io = 300ma t a ( o c ) dropout vs. temperature dropout voltage (v) 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 -40-20 0 2040 6080100120 io = 10ma io=100ma t a ( o c ) v o (v) output voltage vs. temperature v out2 =3.3 v io=300ma io=450ma 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 0 100 200 300 400 500 i o (ma) v o ( v ) load regulation v out2 =3.3v
amc76386 copyright ? 2006 addtek corp. 5 dd055_a -- june 2006 characterization curves (continued) typical performance characteristics v in = 5v c in =1f c out = 4.7f t a =25 o c unless otherwise specified. i o (ma) 4 6 8 10 12 14 0 100 200 300 400 500 quiescent current vs. load i q ( a) 0 2 4 6 8 10 12 14 16 18 20 -40 -20 0 20 40 60 80 100 120 quiescent current vs. temperature t a ( o c ) i q ( a) i out 1 load transient re g ulation v out 1 v out 2 load transient re g ulation i out 2 v out 1 v out 2
amc76386 copyright ? 2006 addtek corp. 6 dd055_a -- june 2006 application note: the maximum power dissipation of a single-output regulator: p d(max) = [ (v in(max) - v out(nom) ) ] i out(nom) + v in(max) i q v out(nom) = the nominal output voltage i out(nom) = the nominal output current, and i q = the quiescent current the regulator consumes at i out(max) v in(max) = the maximum input voltage thermal consideration: the amc76386 series have internal power and thermal limiti ng circuitry designed to protect the device under overload conditions. however maximum junction temperature ratings should not be exceeded under continuous normal load conditions. the thermal protection circuit of amc76386 seri es will prevent the device from damage due to excessive power dissipation. when the device temperature rises to approximately 150 o c, the regulator will be turned off. when power consumption is over about 487mw (sop-8 package, at t a =70 o c), additional heat sink is required to control the junction temperature below 125 o c. the junction temperature is: t j = p d ( jt + cs + sa ) + t a p d : ? total dissipated power. jt : ? thermal resistance from the junction to the mounting tab of the package. cs : ? thermal resistance through the in terface between the ic and the su rface on which it is mounted. (typically, cs < 1.0 o c /w) sa : ? thermal resistance from the mounting surface to am bient (thermal resistance of the heat sink). if pc board copper is going to be used as a heat sink, be low table can be used to dete rmine the appropriate size of copper foil required. for multi-layered pcb, these layers can also be used as a heat sink. they can be connected with several through hole vias. pcb sa ( o c /w ) 59 45 38 33 27 24 21 pcb heat sink size (mm 2 ) 500 1000 1500 2000 3000 4000 5000 recommended figure of pcb ar ea used as a heat sink. (top view) (bottom view) through hole vias
amc76386 copyright ? 2006 addtek corp. 7 dd055_a -- june 2006 package 8-pin surface mount sop-8 inches millimeters min typ max min typ max a 0.183 - 0.202 4.65 - 5.13 b 0.144 - 0.163 3.66 - 4.14 c 0.068 - 0.074 1.73 - 1.88 d 0.010 - 0.020 0.25 - 0.51 f 0.015 - 0.035 0.38 - 0.89 g 0.050 bsc 1.27 bsc j 0.007 - 0.010 0.19 - 0.25 k 0.005 - 0.010 0.13 - 0.25 l 0.189 - 0.205 4.80 - 5.21 m - - 8o - - 8o p 0.228 - 0.244 5.79 - 6.20 seating plan a d f p b k c m l j g
amc76386 copyright ? 2006 addtek corp. 8 dd055_a -- june 2006 important notice addtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. a few applications using integrated circuit products may invo lve potential risks of death, personal injury, or severe property or environmental damage. addtek integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life- support applications, devices or systems or other critical applications. use of addtek products in such applications is understood to be fully at the risk of the customer. in order to minimize risks associated with the customer?s applications, the customer should provide adequate design and operating safeguards. addtek assumes to no liability to customer product design or application support. addtek warrants the performance of its products to the specifications applicable at the time of sale. addtek corp. 9f, no. 20, sec. 3, bade rd., taipei, taiwan, 105 tel: 2-25700299 fax: 2-25700196
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