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MP6401 300ma ldo linear regulator with integrated reset circuit MP6401 rev. 1. 0 www.monolithicpower.com 1 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. the future of analog ic technology descri ption the MP6401 combines a low-dro pout linear regulator with an inte grated rese t circuit. it operates fro m a 2.5v to 5.5v input voltage and regulates th e output voltage with 2 % accura cy at 1.8v, 2.5v, 3.3v or adjustable value. it delivers up to 300ma of load current. by combining an ldo linear regulator with a reset circuit, these products can reduce cost and save space in co mpact portable devices such as cell phones, smart phon es, pdas, pmps, and portable gps devices. the mp640 1 provides a push-pull, active-low that asserts when the regulator out put voltage drops below the microprocessor supply threshold (- 7.5% or -12.5% of no minal output voltage). four reset delay time, 3.1 25ms, 25ms, 200ms and 1580ms can be selected. the MP6401 is available in 3mmx3 mm t q fn8, 2mmx2 mm tqfn6 and tsot packages and is specified for operation fr om -40 c to 85 c. features ? low quiescent current of 80 a for battery powered eq uipment ? low 114mv dropout at 300ma outp ut ? 2 accurate output voltage ? fixed outpu t voltage options of 1. 8v, 2.5v or 3.3v ? adjustable output voltage from 1. 229v to 5v using an external re sistor divide r ? 15 v rms ult r a low noise output ? psrr: 57d b at 1khz ? input reverse current, thermal and short-circuit protection ? microprocessor reset with four delay time options ? push-pull r eset appli c ations ? smart phon e and cell phone ? portable gps devices ? wireless de v i ces ? pda and pmp a l l m ps p a r ts ar e l e a d - fr ee an d ad h e r e to t he roh s di re ctiv e. f o r m p s g r e e n st atus, pl eas e vis i t m p s webs it e un d e r q u a lit y assu ra nce. ? m ps ? a nd ? t he f u tu re of an al og ic t e c h n o l o g y ? a r e re gist er ed t r a dem a r ks of mo no li th i c power systems, inc. typical application 2.5v to 5.5v in out adj en reset gnd gnd up MP6401 r1 c out c in v i/o reset http://
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 2 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. ordering information part number * package top marking free air tem p erature (t a ) MP6401dqt-18ad3 7t MP6401dqt-18bd3 8t MP6401dqt-25ad3 5t MP6401dqt-25bd3 6t MP6401dqt-33bd3 tqfn8 (3m m x 3mm) 4t MP6401dgt-18ad3 7t MP6401dgt-18bd3 8t MP6401dgt-25ad3 5t MP6401dgt-25bd3 6t MP6401dgt-33bd3 tqfn6 (2m m x 2mm) 4t MP6401dj-18ad3 7t MP6401dj-18bd3 8t MP6401dj-25ad3 5t MP6401dj-25bd3 6t MP6401dj-33bd3 tsot23 -6 4t ?40 c to +8 5 c * for other versions, contac t factory for availability. not e : MP6401dqt dg dj output v oltage ( t able 1) temperature p ack age reset t hr eshold a ccur ac y ( t able 2) reset d ela y time ( t able 3) } _ _ _ d _ -lfz table 1?output voltage suffix guide suffix outpu t volta g e 18 1.8 25 2.5 33 3.3 table 2?reset threshold accurac y suffix vout reset threshold (%) a -7.5% b -12.5% table 3?reset dela y time guide suffix typical reset delay time (ms) d1 3.125 d2 25 d3 200 d4 1580
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 3 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. package reference top view in in gnd en 1 2 3 4 out out adj reset 8 7 6 5 t op view in gnd en 1 2 3 out adj reset 6 5 4 en gnd in 1 2 3 6 5 4 reset adj out t op view tqfn8 (3mm x 3mm) tqfn6 (2m m x 2mm) tsot23 -6 absolute m a xi mum ratings (1) in, en, out ................................. ?0.3v to + 6 v adj .................................................. ?0.3v to 6v reset ............................................. ?0.3v to 6v continuous power dissipation . (t a = +25c) (2) tqfn8 (3 mm x 3 m m) .............................. 2.6w tqfn6 (2mm x 2 m m) ............................ 1.56w tsot ....................................................... 0.57w junction te mperature ............................... 150 c lead temperature .................................... 260 c storage temperature .............. ?65 c to +150 c recommended operating conditions (3) supply voltage v in .......................... 2.5v to 5.5v operating junct. temp (t j ) ..... ?40 c to +125 c thermal resistance (4) ja jc tqfn8 (3 mm x 3 m m) ........... 48 ...... 11 ... c/w tqfn6 (2 mm x 2 m m) ........... 80 ...... 16 ... c/w tsot ..................................... 220 .... 110 .. c/w notes : 1) exceeding these ratings ma y da m age the device. 2) the ma ximum allowable po w e r dissipation is a fun c tion of the maximum junction temperature t j (m ax), the junction-to-ambie nt thermal r e sistance ja , and t he ambient temperatu r e t a . the ma ximum allow able contin uous po w e r dissipation at any ambient temp erature is calculated b y p d (max) = (t j (ma x )-t a )/ ja . excee d ing the maximu m allo w a b l e pow e r dissipation w ill cause ex cessive die temp er atur e, and the regulato r w ill go into the r mal shutdo w n . int e rnal therma l shutdo w n circuitr y pr otects the device from permanent damage. th erm a l shutdow n e n g ages at t j =150 o c ( ty p ) an d disengages at t j =130 o c( t y p) 3) the device is not guarant eed to function outside of its operating conditions. 4) measured on jesd51-7 4-layer board.
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 4 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. electri c al characteristi cs v in = (v out + 0.5v) or +2.5v, w h ich ever is greater, c out = 3.3f. t y pic a l value at t a = +25c unless otherw i se n o ted. parameter sy mbol conditio n min t y p max unit input supply ran ge v in 2.5 5.5 v input und e rv oltage lo cko u t v uvlo v in falling 1.85 2.05 2.2 v hysteresi s of uvlo v hy s 190 mv supply cu rre nt (g rou n d cur r e n t) i q i out = 0 80 155 a shutdown su pply curre n t i shdn t a =+25 c 0.1 1 a regulation circuit output cu rre n t 300 ma output volt age a c cura cy (fixed outp ut voltage) 1ma i out 300ma -2 +2 % adjustabl e o u tput voltage ran ge v adj 5 v adj referen c e voltage v adj 1.205 1.229 1.253 v adj th re shol d 250 mv adj input le aka ge curren t i adj v adj = 0, +1.2v 20 100 na dro pout vo ltage (fixe d output voltag e) (5) ? v do v out = +3. 3 v , i out = 300m a 114 220 mv short cu rrent limit v in 2.5v 375 ma in regul ation current limit v in 2.5v 500 ma input reve rse lea ka g e cur r e n t (o ut to i n lea kag e cu rrent) v in = 4v , v out = 5v , e n dea sserted, t a =+2 5 c 0.01 1 a en input low voltage v il 0.3v in v en input hig h voltage v ih 0.7vin v en input cu rrent en= v in or g nd, t a =+2 5 c -1 0.1 +1 a therm a l-sh utdown t e mp er a t ur e t shdn 150 c therm a l-sh utdown hysteresi s ? t shdn 20 c line regulati on v out =1.5v, 2.5v v in 5.5v, i out = 10ma 0.02 %/v load reg ulat i on v out = 1.5v, v in = 2.5v, 1ma iout 150ma 0.1 % output voltag e noi s e 10hz to 100 khz, c in = 0. 1 f, i out = 100ma , v out = 1.5v 15 v rm s rese t cir cuit MP6401 _ _ - _ _ ad_ 90 92.5 95 v out reset thre shol d v th o ut MP6401 _ _ - _ _ bd_ 85 87.5 90 % v out v out to reset delay 30 s d1 2.2 3.125 4.0 d2 17.5 25 32.5 d3 140 200 260 re set del a y time t d d4 1106 1580 2054 ms
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 5 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. electri c al characteristi cs (continu e d) v in = (v out + 0.5v) or +2.5v, w h ich ever is greater, c out = 3.3f. t y pic a l value at t a = +25c unless otherw i se n o ted. parameter symbol condition min typ max unit v out 1.0v, i sink = 50a, re se t asserted 0.3 v ol v out 1.5v, i sink = 3.2ma, reset asserted 0.4 r e set output voltag e push-pull v oh v out 2.0v, i source = 500a, reset deasse rted 0.8v out v notes : 5) dropout voltag e is defined as the input to output dif f erent ial w hen th e output voltage drops 100mv bel ow its nominal va lue.
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 6 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. pin functio n s tqfn8 pin # tqfn6 pin# tsot pin# name description 1 2 1 3 in supply input pin. 3 2 2 gnd ground. 4 3 1 en enable (active high). connect en to in generally. don?t float en pin. 5 4 6 re se t push-pull reset . it asserts when the out voltage drops below its threshold. when out voltage recover, reset deasserts after a fix delay time (four options). 6 5 5 adj mode selector input. when adj is connect ed to the tap of an external resistor divider from the out to gnd, the ou t voltage is adjustable. when adj is connected to gnd, a preset output voltage is selected. 7 8 6 4 out reg u lator o u tput pin.
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 7 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. typical perfo r manc e characteristics v in =5v, v out =3.3v, c out =3.3f, t a = -40c to +85c, typical values are at t a =+25c, unless otherwise noted. s uppl y c ur r e nt v s . input v o t a ge adj = g nd, i out = 300m a 340 370 400 430 460 3.8 4 .2 4.6 5 5.4 input v o lt a g e ( v ) input v o lt a g e ( v ) input v o lt a g e ( v ) input v o lt a g e ( v ) s uppl y c ur r e nt v s . input v o t a ge adj = g nd, i out =0 40 55 70 85 100 3.8 4 .2 4.6 5 5.4 s uppl y c ur r e nt v s . input v o t a ge v o =1 .5 v, i out = 300m a 340 370 400 430 460 2.5 3 .5 4.5 5 .5 s uppl y c ur r e nt v s . input v o t a ge v o =1 .5 v, i out =0 40 55 70 85 100 2.5 3 .5 4.5 5 .5 dropout v ol t a ge v s . loa d c ur r e nt 0 20 40 60 80 100 120 140 160 0 50 100 150 200 250 300 loa d c u r r e nt (m a ) d r opout v o l t a g e (m v ) psrr vs. fre q ue nc y i out =300ma 0 10 20 30 40 50 60 70 fr e que nc y ( h z ) psrr ( d b) o u t p u t volta g e a ccu r a y v s . te m pe r a t ur e -0 . 5 -0 . 3 -0 . 1 0. 1 0. 3 0. 5 -4 0 -2 0 0 2 0 4 0 6 0 8 0 t e m p er atur e ( o c) o u t p u t v o l t a g e a c c u r a c y(%) transient dura t i o n v s . r e s e t thr e s hol d ov e r d r i v e r e s e t thr e s hol d o v e r dri v e ( mv ) p l u se d u r at i o n ( us) 0 30 60 90 120 110100 region of stable c out e s r v s . loa d c urr e nt 0 0. 5 1 1. 5 2 2. 5 3 0 50 100 150 200 250 300 loa d c urr e nt ( ma ) reset asserts above this line unstable region stable region 10 10 2 10 3 10 4 10 5 10 6
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 8 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. typical perfo r manc e characteristics (co n tinued) v in =5v, v out =3.3v, c out =3.3 f, t a = -40c to +85c, typical values are at t a =+25c, unless otherwise noted. v out 2v/div . v reset 2v/div . v in 5v/div. reset response t o v in rising adj=gnd,i out = 0
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 9 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. block diagram ea -- + -- + -- + thermal protection mode selector v ref2 vref1 driver en en adj in out reverse current protection current limit v ref3 logic reset reset reset comparator figure 1?MP6401 bl ock diagram
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 10 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. timing diagram 5v 0 vin t figure 2?reset tim i ng diagram
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 11 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. operation the mp640 1 integrates a low noise, low dropout , low quiescent current linear regulator and a microprocessor reset circuit. it operates from a 2.5v to 5.5v input voltage and regulates the fixed output voltage with 2% accuracy at 1.8v, 2.5v, 3.3v or adjustable value. the MP6401 can supply to 300ma of load current. the internal reset circuit is used to monitor the regulator output voltage. the r eset assert s when the re gulator output voltage drops below the standard microprocessor supply t h reshold. linear regulator the MP6401 can output a fixed voltage (1.8v, 2.5v, 3.3v options) or adjustable voltage which ranges from 1.25v to 5v with 2.0% accuracy by operating from a +2.5v to +5.5v input. the MP6401 can supply up to 300ma of load current. when adj is connected to gnd, a fixed output voltage is selected. connecting adj pin to the tap of external resistor divider from the out to gnd, adjustable output voltage is selected. the typical adj connection is shown in fig 3. 2.5v to 5.5v in out adj en gnd MP6401 r1 r2 figure 3?output voltage adjusted w ith resistor di vider reset function the reset circuit monitors the out voltage. reset asserts while out voltage falls below its threshold. two out voltage thresholds (-7.5% and -12.5%) are available . the power-up, power-down, and brownout conditions will make r eset asserted . so mp640 1 monitor circuit could right control the microprocessor. reset asserts when the input and output voltage below their thresholds. reset asserts when en is a low logic. when the assert trigger condition is removed, r eset will deassert after a fixed delay time. four o p tions of reset delay-time (see table 3) can be se lected. en shutdo w n the mp640 1 can be switched on or off by a logic input a t the en pin. a high volta ge at this pin will turn the device on. when the en pin is low, the regulato r output is o ff and the supply current is reduced. generally, t he en pin s hould be tied to in to kee p the regu la tor output always on. do not float the en pin. reverse leakage protection an internal circuit monito rs v in and v out to contro l the reverse leakage current from out to in. while v in decreases lo wer than v ou t and en s t ill hold logic h i gh, the mo nitor circuit turns off the pass element and its pa rasitic diode . typically the reverse leakage current through pass element decreases t o 0.1ua. r eset d easserts un til v in returns greater than v out and v out is higher tha n its preset thr e shold. MP6401 also can work with backu p battery at out after input power supply is removed as shown in fig 4. when input power supply is removed, reset asserts. the backup battery will power the device through two external diodes and typically the current from out to ground is 40ua. so, the power supply removing does not erase ram content if the voltage of backup battery is greater than memory?s standby specification. the backup battery can be replaced by a super-cap, while the diode connected with battery is changed to a current-limiting resistor. MP6401 in out en removable memory up 3.3uf backup battery figure 4? maintain memory w i th backup battery current li mit the MP6401 includ es a current limit structur e which monit o rs and co ntrols pa ss element gate voltage limiting the guar anteed maxi mum output current to 5 00ma.
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 12 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. thermal shutdow n thermal protection tur ns off the pass e l ement when the ju nction temp erature exceeds +150o c, allowing to cool the ic. when the ic?s junction temperature drops by 20oc, the pass element will be turned o n again. t h e r mal protection limits tot a l power dissipation on t he MP6401. for reliab l e operation, ju nction temp erature sho u ld be limite d to 125 oc maximu m.
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 13 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. appli c ation information adjustable regulator output the out voltage of MP6401 has two modes available (fixed and ad justable out put voltage). when adj pin is conne ct ed to gnd, t he regulator works in fixed voltage mode. the regulator outp u t voltage will equal to pre s et voltage ( 1 .8v, 2.5v o r 3.3v options). in fixed voltage mode, th e impedance between adj and ground shou ld always be less than 5 0 k ? . generally, adj is connected d i rectly to gro und. when the adj pin is connected to the tap of an external resistor divider, the regulator works in adjustable voltage mode as shown in fig 3. the output voltage is selected by resistor divider, thus 12 out 2 rr v 1.229 r + = in adjustable voltage mode, r 2 equal to 13k ? is recommend ed as a goo d tradeoff a m ong stability, accuracy a nd high-freq uency psrr. r 2 should be not great er than 100k ? . pow e r diss ipation the power dissipat ion f or any package depend s on the thermal resistan ce of the ca se and circu i t board, the temperature difference between the junction and ambient air, and the ra te of airflow . the power dissipat ion across the device can be represented by the equation: p = (v in - v out ) i out the allowable power dissipation can be calculated u s ing the following equation: p d (max ) = (t j (max )-t a )/ ja where (t j ( m ax )-t a ) is the temperature differen c e between the junctio n and the ambient environment , ja is the thermal re sistance fro m the junctio n to the ambient environment. connecting the gnd pi n of MP6401 to ground using a large pad or ground plane helps to channel hea t away. output cap acitor selection the mp640 1 is designe d specifica l ly to work wi th very low esr ceramic output ca pacitor 3.3u f (min). for performance considera tion, a larg e ceramic capacitor such as 10uf is better. x 7 r o r x 5 r capacit or dielectric is recommended. out voltag e transient immunity the mp640 1 can be immune to out pin short negative transient. typically, the immune durati on is 60u s with 10mv overd r iving. a sho r ter negative transient ca n not make t he reset output assert.
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 14 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. package informati o n tqfn8 (3mm x 3mm) side view top view 1 8 5 4 bottom view 2.90 3.10 1.45 1.75 2.90 3.10 2. 25 2.55 0.65 bsc 0.20 0.30 0.70 0.80 0.00 0.05 0.20 ref pin 1 id mar k in g 1.70 0.65 0.25 recommended land pattern 2.90 pin 1 id see detail a 2.50 0.70 pin 1 id option b r0.20 typ. pin 1 id op tion a 0. 30 x45 o ty p. detail a 0. 30 0.50 pin 1 id index area
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic MP6401 rev. 1. 0 www.monolithicpower.com 15 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. tqfn6 (2mm x 2mm) side view top view 1 6 4 3 bottom view 1.90 2.10 0.65 0.85 1.90 2.10 1. 2 5 1.45 0.65 bsc 0.20 0.30 0.70 0.80 0.00 0.05 0.20 ref pi n 1 id ma rk i n g 0.70 0.65 0. 25 recommended land pattern 1.90 note: 1) all di me n s ions ar e in mi llime te r s . 2) e xposed p a d d le size does n o t inc l u d e m o ld flas h . 3) le ad co pl an ar ity s h a ll be 0 . 10 mill ime t e r ma x. 4) je de c re fe r e nc e is mo-22 9 , v a r i at ion wcc c . 5) dr awi n g i s not to sc al e. pin 1 id see detail a 1.40 0.70 pi n 1 id optio n a 0.30x45o typ. pin 1 id optio n b r0.20 typ. detail a 0.30 0.40 pin 1 id index area
MP6401 ? 300ma ldo linear regulat o r with i n tegrated reset ic notice: t he i n formatio n in this docum ent i s subject to chang e w i t h o u t notice. users sh oul d w a rra nt and gu arante e that third part y int e ll ectu al prop ert y r i g h ts are n o t inf r ing ed u p o n w hen i n tegr atin g mps product s into an y ap p licatio n. mps w i ll not assume a n y le gal res pons ib ili t y for an y sai d app licati ons. MP6401 rev. 1. 0 www.monolithicpower.com 16 9/7/2012 mps proprietar y information. pate nt protected. un authorized photo c op y and d uplication prohibited. ? 2012 mps. all rights reserved. tsot23-6 0.3 0 0.5 0 seating plane 0.95 bsc 0.8 4 0.90 1.00 max 0.00 0.10 top view front view side view recommended land pattern 2.80 3.00 1.50 1.70 2.60 3.00 1 3 4 6 0.09 0.20 note: 1 ) all di m e ns i o ns a r e i n mi lli m e te rs . 2) p acka ge len g th d o es n o t inc l u d e m o ld fla sh, pr otru sion o r g a te bu rr. 3) p acka ge width doe s not inc l ude in te rlead fla s h o r pro t rus i o n. 4) lea d co plana rity (bo tto m of leads after forming) shall be 0.10 millim e te rs max. 5) d rawing co nfor ms to jedec m o - 1 93, var i ation a b . 6) d rawing is no t to scale . 7 ) p i n 1 is lower left pin whe n rea d ing to p m ark fr om left to right, (see e x ample top mark) 0.30 0.50 0 o -8 o 0.2 5 bs c gauge plane 2.60 typ 1.20 typ 0.9 5 bsc 0.60 typ see detail "a" detail a aaaa pin 1 see note 7 example top mark

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