ap139 300ma low-noise cmos ldo ap139 rev. 6 1 of 7 february 2009 www.diodes.com ? diodes incorporated lead-free ? very low dropout voltage ? low current consumption: typ. 45 a, max. 60ua ? output voltage: 1.5v, 1.8v, 2.0v, 2.5v, 2.8v, 3.0v 3.3v, and 3.5v ? guaranteed 300ma output ? input range from 2.7 up to 5.5v ? thermal shutdown ? current limiting ? stability with low esr capacitors ? low temperature coefficient ? lead free package: sot25 ? sot25: available in ?green? molding compound (no br, sb) ? lead free finish/rohs compliant (note 1) the ap139 is a positive voltage linear regulator utilizing cmos technology. the features that include low quiescent current (45 a typ.), low dropout voltage, and high output voltage accuracy, make it ideal for battery applications. en input connected to the device will produce a low bias current. the space-saving sot25 package is attractive for ?pocket? and ?hand held? applications. this rugged device has both thermal shutdown, and current limit protections to prevent device failure under the ?worst? operating conditions. in a low noise, regulated supply application, a 10nf capacitor is necessary to be placed in between bypass and ground. the ap139 is stable with a low esr output capacitor of 1.0 f or greater. ? personal communication devices ? home electric/electronic appliances ? pc peripherals ? battery-powered devices output voltage package packing w : sot25 lead free g : green 7 : tape & reel l : lead free ap139 - xx w x - 7 15 :1.5v 18 :1.8v 20 :2.0v 25 :2.5v 28 :2.8v 30 :3.0v 33 :3.3v 35 :3.5v device package code packaging (note 2) 7? tape and reel quantity part number suffix ap139-xxwl-7 w sot25 3000/tape & reel -7 AP139-XXWG-7 w sot25 3000/tape & reel -7 notes: 1. eu directive 2002/95/ec (rohs). all applicable rohs exemptions applied. please visit our website at http://www.diodes.com/products/lead_free.html . 2. pad layout as shown on diodes inc. suggested pad layout document ap02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf . features general description applications ordering information
ap139 300ma low-noise cmos ldo ap139 rev. 6 2 of 7 february 2009 www.diodes.com ? diodes incorporated ( top view ) sot25 1 3 2 5 4 byp v in en gnd v out ap139 pin name pin no. description v in 1 power supply gnd 2 ground en 3 enable pin byp 4 bypass signal pin v out 5 output block diagram current limit thermal shutdown amp + - vref byp en 1ua v out gnd v in r1 r2 absolute maxi mum ratings symbol parameter rating unit v in input voltage +6 v i out output current p d /(v in -v o ) ma v out output voltage gnd - 0.3 to v in + 0.3 v esd classification b t op operating junction temperature range -40 to +125 oc t mj maximum junction temperature 150 oc p d internal power dissipation 250 mw pin assignments pin descriptions
ap139 300ma low-noise cmos ldo ap139 rev. 6 3 of 7 february 2009 www.diodes.com ? diodes incorporated recommended oper ating conditions symbol parameter min max unit v in input voltage 2.7 5.5 v i out output current 0 300 ma t a operating ambient temperature -40 85 c electrical characteristics (t a = +25oc, unless otherwise noted) symbol parameter test conditions min typ. max unit v in input voltage note 3 - 5.5 v i q quiescent current i o = 0ma - 45 60 a i stb standby current v in = 5.0v, v out = 0v, v en < v el - 2.0 3.0 a v out output voltage accuracy i o = 1ma, v in = 5v -2 - 2 % v out temperature coefficient - 50 - ppm/ o c v dropout dropout voltage i o = 1ma to 300ma, v out = v o ( nom ) - 1.5% v o 2.8v - - 0.45 v i out output current 300 - - ma i limit current limit v out > 1.05v 300 450 - ma i short short circuit current v cc = 5v, v out < 1.05v - 150 300 ma v line line regulation i out = 1ma, v in = (v out +1v) to 5.5v - 0.1 0.3 % v load load regulation i o = 1ma to 300ma, v in = 5v - 0.3 1 % psrr power supply rejection i o = 100ma, c o = 2.2 f ceramic f = 1khz - 60 - db f = 10khz - 50 - f = 100khz - 40 - psrr power supply rejection i o = 100ma, c o = 2.2 f ceramic, c byp = 20nf f = 1khz - 75 - db f = 10khz - 55 - f = 100khz - 30 - v eh en input threshold output on 1.7 - - v v el output off - - 0.8 v i en enable pin current - - <0.1 a ots over temperature shutdown - 130 - o c oth over temperature hysteresis - 20 - o c ja thermal resistance sot25 (note 4) 226 oc/w jc thermal resistance sot25 (note 4) 34 oc/w notes: 3. v in(min) = v out + v dropout. 4. test conditions for sot25: devices mounted on fr-4 pc board, mrp, 1 oz. copper, si ngle sided, calibrate at t j =85 oc, measure at t a =25 oc, no heat sink, no air flow.
ap139 300ma low-noise cmos ldo ap139 rev. 6 4 of 7 february 2009 www.diodes.com ? diodes incorporated typical application ap139 byp en v out gnd v in c1 1uf c2 10nf c3 1uf in out typical performance characteristics -90 -80 -70 -60 -50 -40 -30 -20 -10 0 1.0e+00 1.0e+01 1.0e+02 1.0e+03 1.0e+04 1.0e+05 1.0e+06 power supply rejection ratio psrr (db) frequency (hz) bp = 1nf bp = 5nf bp = 10nf bp = 20nf iout = 100ma -90 -80 -70 -60 -50 -40 -30 -20 -10 0 1.0e+00 1.0e+01 1.0e+02 1.0e+03 1.0e+04 1.0e+05 1.0e+06 power supply rejection ratio psrr (db) frequency (hz) 100ma 10ma 1ma bp = 10nf 0 10 20 30 40 50 60 70 80 90 100 3.5 4 4.5 5 5.5 6 vcc vs quiescent current vcc (v) quiescent current ( a) ta=25
ap139 300ma low-noise cmos ldo ap139 rev. 6 5 of 7 february 2009 www.diodes.com ? diodes incorporated typical performance characteristics (continued) -90 -80 -70 -60 -50 -40 -30 -20 -10 0 1.0e+00 1.0e+01 1.0e+02 1.0e+03 1.0e+04 1.0e+05 1.0e+06 power supply rejection ratio psrr (db) frequency (hz) 100ma 10ma 1ma bp=0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 1.5 1.8 2 2.5 2.8 3 3.3 3.5 current limit (a) vout vs current limit vcc=5v vout (v) 0 50 100 150 200 250 300 350 400 3.5 4 4.5 5 5.5 6 vcc vs short current vcc (v) short current (ma) top to bottom vout=1.5v vout=1.8v vout=2.5v vout=3.3v functional description the ap139 of cmos regulators contain a pmos pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown. the p-channel pass transistor receives data from the error amplifier, over-current protection, and thermal protection circuits. during normal operation, the error amplifier compares the output voltage to a precision reference. the over-current and thermal shutdown circuits become active when the junction temperature exceeds 130 o c, or the current exceeds 300ma. during thermal shutdown, the output voltage remains low. normal operation is restored when the junction temperature drops below 110 o c. the ap139 switches from voltage mode to current mode when the load exceeds the rated output current. this prevents over-stress. enable the enable pin normally floats high. when actively, pulled low, the pmos pass transistor shuts off, and all internal circuits are powered down. in this state, the quiescent current is less than 2 a. this pin behaves much like an electronic switch. external capacitor the ap139 is stable with a low esr output capacitor to ground of 1.0 f or greater. it can keep stable even with higher esr capacitors. a second capacitor is recommended between the input and ground to stabilize v in . the input capacitor should be larger than 0.1 f to have a beneficial effect. all capacitors should be placed in close proximity to the pins. a ?quiet? ground termination is desirable.
ap139 300ma low-noise cmos ldo ap139 rev. 6 6 of 7 february 2009 www.diodes.com ? diodes incorporated marking information (1) sot25 1 2 3 5 7 4 xx y w x xx : identification code w : week : a~z : 1~26 week; x : a~z : lead free ( top view ) y : year 0~9 a~z : 27~52 week; z represents 52 and 53 week a~z : green part number package identification code ap139-15w sot25 n0 ap139-18w sot25 n1 ap139-20w sot25 n2 ap139-25w sot25 n3 ap139-28w sot25 n4 ap139-30w sot25 n5 ap139-33w sot25 n6 ap139-35w sot25 n7 package information (all dimensions in mm)
ap139 300ma low-noise cmos ldo ap139 rev. 6 7 of 7 february 2009 www.diodes.com ? diodes incorporated important notice life support diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to any product herein. diodes incorporated does not assume any liability arising out of the application or use of any pr oduct described herein; neither does it convey any license under its patent rights, nor the rights of others. the user of products in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on our website, harmless against all dam ages. diodes incorporated products are not authorized for use as critical components in life support devices or systems without the e xpressed written approval of the president of diodes incorporated.
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