MPQ6400 low quiescent current progra m mable-dela y supervisor y circuit aec-q 1 00 q ual ified MPQ6400 rev. 1 . 0 www.monolithicpower.com 1 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. the future of analog ic technology descri ption the mpq64 00 family is the microprocessor (p) supervisory circu i t w h ich can monitor and provide reset functio n f o r system voltages fro m 0.4v. whe n either th e sense voltage falls below its t h reshold ( v it ) or the voltage of manual reset ( m r ) is pulle d to a logic low, the r e s e t signal will be a ssert ed. the r e set voltage can be fa ctory-set for stan dard voltage rails from 0. 9v to 5v, while the MPQ6400dg- 01 reset voltage is adju s table with an external resistor divider. when sense volt age and m r exceed their thresholds, r e s e t is driven to a logic high after a user-programmable delay time. the mpq64 00 has a very low quiescent current of 1.6 a typ i cally, which makes it ideal suitable for battery-powered application s . it provides a precision re ference to achieve 1% threshold accuracy. t he reset delay time can be select ed by a capacitor which is connect ed between c delay and gnd, allowing the user to select any delay time from 2.1ms to 10s. 380ms delay time is sele cted by connecting the c delay pin to v cc , while 24ms delay time by leaving the c delay pin float. mpq6 400 is available in 2mm2mm 6-pin qfn package. features ? guaranteed industrial/au tomotive te mp range limits ? fixed threshold voltage s for standard voltage rails from 0.9v to 5v and adjustable voltage from 0.4v are available ? low quiescent current: 1.6 a typ ? power-on reset generator with adjustable delay time: 2.1ms to 10s ? high threshold accuracy: 1% t y p ? manual reset ( m r ) input ? open-drain r e s e t output ? immune to short negative sense voltage ? guaranteed reset valid to v cc =0.8v ? 22mm qf n appli c ations ? dsp or micro controller applications ? laptop/desktop computers ? pdas/hand-held products ? portable/battery-powere d products ? fpga/asic application s for mps g reen sta t us, plea se v i sit mp s w ebsite under q uality assuran c e . ?mp s ? and ?th e fu ture o f a nal og ic t e chno lo gy ? are r e g i ste r ed t r a dem ar ks o f monolithic pow e r sy st em s , inc. ty pic al application http://
MPQ6400 - - low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c irc u it MPQ6400 rev. 1.0 www.monolithicpower.com 2 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. tm v cc r1 vcc sense mr gnd c delay c delay c3 gnd reset reset r2 microprocessor dsp microcontroller MPQ6400 c1 c2 r3
MPQ6400 - - low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c irc u it MPQ6400 rev. 1.0 www.monolithicpower.com 3 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. tm ordering information part number* packag e t j mpq640 0dg - 33** qfn6 (2x2mm) -40 ? c to +125 ? c mpq640 0dg - 33-aec1 qfn6 (2x2mm) -40 ? c to +125 ? c * for ta pe & reel, ad d suffix ?z (e.g. MPQ6400dg?xx-z); for rohs compliant packaging, add suffix ?lf (e.g. MPQ6400dg?xx-lf?z). ** check factory for availability in other options. package reference top view vcc sense c dela y 1 2 3 reset gnd mr 6 5 4 qfn6 ( 2 x 2mm) absolute m a xi mum ratings (1) supply voltage v cc .......................... -0.3 to 6.0v c delay volta ge v cdelay ........ -0.3v to v cc + 0.3v sense voltage v sense ..................... -0.3v to 6v all other pins ............................... -0.3v to +6.0v reset curr ent re set i ................................ 5m a continuous power dissipation (t a = +25c) (2) q f n6 (2m m x2mm ) .................................... 2.5w junction te m perature ............................... 150c lead tem perature .................................... 260c storage tem perature ............... -65c to +150c recommended operating conditions (3) supply voltage v cc ......................... 1.8v to 5.5v ma xi mu m j u n c t i o n te mp . ( t j ) ............. +125c thermal resistance (4) ja jc q f n6 (2x2m m ) ...................... 50 ...... 12 ... ? 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 temperatu r e t j (max), the junction-to- ambient therm a l resistance ja , a nd the a m bient t e mperatu r e t a . the maximu m allow a ble con t inuous po w e r di ssipation at an y ambient tem peratur e is calculated b y p d (max)=(t j (max)- t a )/ ja . excee d ing the maximum allow able po wer dissipation w ill cause ex cessive die temperature, and the reg u l ator w ill go into thermal sh utdo w n . inte rnal thermal shutdo w n circuitr y protects the device from perma ne nt damage. 3) the device is not guarante ed to fu nction outside of its operating conditions. 4) measured on je sd51-7 4 - la y e r b oard.
MPQ6400 ? low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c i rc u i t MPQ6400 rev. 1 . 0 www.monolithicpower.com 4 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. electric al characteristi cs 1.8v v cc 5. 5v, r 3 = 100k ? , c 3 = 47pf, t j = -40c to +125c, t y pical values are at t j =+25c, unless otherw i se noted . pa rame ters sy mbol condit i on min t y p ma x u nits input sup p l y r ang e v cc 1.8 5.5 v supp l y curre nt (current into v cc pin) i cc v cc = 3.3v, r e s e t not asserted. m r , r e s e t , c de l a y o p en 1.6 5 a v cc = 5.5v, r e s e t not asserted. m r , r e s e t , c de l a y o p en 1.85 15 a low - l e ve l output voltage v ol 1.3v v cc < 1.8v, i ol = 0.4ma 0.3 v 1.8v v cc 5.5v, i ol = 1.0ma 0.4 v pow e r- up res e t voltage (5 ) v ol (max) = 0.2v, r e s e t i 1 5 u a ? t rise ( vcc ) 15s/v 0.8 v neg a tive-g oi ng input t h resh old accurac y (7 ) v it -40c to +85c -2.5 1.0 1.5 % -40c to + 125 c -3 1.7 h y ster esis o n v it pin v hys 1.5 4 v it % m r internal pull-up resistance m r r 50 110 k ? input curre nt at sense pin i sense fi xe d versi ons v sen se = 6 v 2.4 a r e s e t leaka ge c u rrent r e s e t v = 5.5v, r e s e t not asserted 500 na m r logic l o w inp u t v il 0.25v cc v m r logic h i gh in p u t v ih 0.7v cc v sense ma xim u m t r ansient durati on t w v ih = 1.05 v it , v il = 0.95 v it 17.5 s r e s e t dela y t i me t d c de l a y = open 15 24 34 ms c delay = v cc ( 6 ) 230 380 530 ms c delay = 150pf 1.3 2.1 3 ms c delay = 10nf ( 6 ) 61 102 142 ms m r to r e s e t propa gati o n del a y t ph l1 v ih = 0.7 v cc , v il = 0.25 v cc 160 ns high to lo w level r e s e t delay, sense to r e s e t t ph l2 v ih = 1.05 v it , v il = 0.95 v it 17.5 s note : 5) the lo w e st supply voltage (v cc ) at w h ich r e s e t becomes active. 6) guar anteed b y d e sign. 7) v sen se falling slow l y
MPQ6400 - - low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c irc u it MPQ6400 rev. 1.0 www.monolithicpower.com 5 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. tm ordering information product packag e top mark nominal supply voltage thresh old voltage (vit ) mpq640 0dg - 33 qfn 3.3v 3.07v pin functio n s qfn pin # nam e des c ription 1 v cc supply voltage. a 0.1uf decoupling ceramic capacitor should be put close to this pin. 2 sense sense pin is con n e c ted to the monitored sy stem voltage. whe n the monitore d voltage is belo w de sire d threshold, r e s e t is asserted. 3 c dela y programma bl e re set del a y time pin. whe n c delay c o nn ec te d to v cc throug h a re si stor betwe en 50 k ? and 200 k ? , a 380ms de lay time is selected. wh en c dela y floated, the delay time is 24m s. a capa citor bigge r than 1 50pf con n e c ted c delay to gnd co uld b e use d to get the use r ?s p r o g ramm able ti me from 2.1 m s to 10 s. 4 m r the man ual reset ( m r ) ca n introdu ce a nother lo gic sign al to co ntrol the r e s e t . it is internally connec ted to v cc through a 9 0 k ? r e si st or. 5 gnd ground. 6 r e s e t r e s e t is an op en d r ain sig nal whi c h will be a s serted whe n the sense voltage d r op s bel o w a pre s et threshold or when the manual re set ( m r ) pin dro p s to a logic low. the r e s e t delay time is programmabl e from 2.1ms to 10s by usin g external cap a citors. a pull-up re si sto r bigge r tha n 10k sh ould b e co nne cted this pin to su pply line, a n d the r e s e t outputting a highe r voltag e than v cc is allowable. detail description the mp q6 400 product fam ily asserts a r e s e t signal whe n either th e sense pin voltage is lower than v it or the manual reset ( m r ) is driven low. the m p q6400- xx fa m ily, o t her than the mpq640 0dg - 01, can m o nitor a fixed voltage from 0.9v to 5.0 v . the m p q6400dg-0 1 can m onit o r any voltage above 0.4v by adjusting the external resistor d i vider. after b o th the m a n ual reset ( m r ) and sense voltages exceed their th resholds, th e r e s e t output re m a ins asserted for a user ?s program m a ble delay tim e . two fixed r e s e t delay times are user-selectab l e: 380m s d e lay tim e by connecting the c delay pi n to v cc , an d 24m s dela y tim e by leaving the c delay pin floa t. any dela y tim e from 2.1m s to 10s could b e gotten by connecting a capacitor between c delay and gnd. the wide m onitor voltage and p r ogram mabl e reset delay tim e m a ke m p q6400 product fam ily suitable for a broad array of applications.
MPQ6400 ? low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c i rc u i t MPQ6400 rev. 1 . 0 www.monolithicpower.com 6 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. typical perfor manc e characteristics v cc =3.3v, r 3 = 100k ? , c 3 = 47pf, t a = -40 c to +125c, ty pical values are at t a =+25c, unl ess otherw i se n o ted. normalized v it vs. temperature reset d e l a y v s . t e m p e r a t u r e (c dela y =150pf cap) r eset d e l a y v s . t e m p e r a t u r e (c dela y =v cc ) r eset d e l a y (ms) r eset d e l a y (ms) reset delay time vs. c dela y suppl y c ur r e nt v s . v cc 1.5 2 .5 3.5 4 .5 5.5 6.5 v cc (v ) 0. 001 0. 01 0. 1 1 10 100 0. 0001 0. 001 0. 01 0. 1 1 10 r eset de l a y t i m e ( s ) m axi m u m s e n s e t r an s i en t d u r a t i on v s . s e n s e thr e s hol d o v er d r i v e v o l t ag e r eset d e l a y v s . t e m p e r a t u r e (c dela y =open) r eset d e lay(ms) 0 1 2 3 4 5 6 7 8 9 10 1 10 100 01 0 2 0 3 0 40 50 60 20 21 22 23 24 25 26 27 28 29 30 -40 -20 0 2 0 4 0 6 0 80 100 120 140 v cc =3.3v v cc =1.8v v cc =6v 340 360 380 400 420 440 460 480 500 -40 -20 0 20 4 0 6 0 8 0 100 120 140 v cc =3.3v v cc =1.8v v cc =6v 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 -40 -20 0 20 4 0 6 0 8 0 100 120 140 v cc =6v v cc =1.8v v cc =3.3v i reset vs. low level reset v oltage v hys vs. t emperature -40 -20 0 20 40 6 0 80 100 120 140 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 -40 -20 0 2 0 4 0 6 0 8 0 100 120 140 v cc =1.8v v cc =6v v cc =3.3v 0 0.5 1 1.5 2 2.5 3 3.5 v cc =1.8v v cc =6v v cc =3.3v 0 2 4 6 8 10 12 14 0 0.2 0.4 0.6 0.8 1 low level reset vol t age(v) ireset(ma) v cc =6v v cc =3.3v v cc =1.8v
MPQ6400 ? low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c i rc u i t MPQ6400 rev. 1 . 0 www.monolithicpower.com 7 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. functional block diagram 0.4v reset logic t imer reset logic timer adjustable voltage MPQ6400dg-01 MPQ6400dg-xx vcc vcc vcc mr reset c dela y gnd adjustable v oltage v ersion sense 90k vcc 90k -- + 0.4v r1 r2 -- + sense gnd fixed v oltage v ersion c dela y mr reset figure 1?functional block diagram 0.8v 0.0v v it +v hys v it 0.7v cc 0.25v cc v cc reset sense t d t d t d mr t ime timing diagram t d =reset delay =undefined state figure 2?MPQ6400 timing diagram truth ta ble m r sense > v it r e s e t l 0 l l 1 l h 0 l h 1 h
MPQ6400 ? low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c i rc u i t MPQ6400 rev. 1 . 0 www.monolithicpower.com 8 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. applic ation information reset outp ut function the m p q6400 r e s e t output is typically connected to the r e s e t input of a m i croprocessor, as shown in figure 3. when r e s e t is not asserted, a pull up resistor m u st be connected to hold this sig nal high. th e voltage of reset signa l is allowed to be high er than v cc (up to 6 v ) through a r e sistor p u lling up from supply line. if the voltage is below 0.8v, r e s e t output is undefined. this co ndition ca n be ign o red generally because that m o st m i croprocessors d o not function at this state . when both sense and m r are higher than their thr e shold volta ge, r e s e t output hold s logic high . once eith er of the tw o drops belo w their th reshold, r e s e t w ill b e asserted. v cc r1 vcc sense mr gnd c delay c delay 47pf gnd reset reset r2 microprocessor dsp microcontroller 0.1uf 1nf 100k figure 3?ty pical appl ication of MPQ6400 w i th microprocessor from the p o int that m r is again logic high a n d sense is above v it + v hys (the threshold hysteresis), r e s e t w ill be driv en to a logic high after a re se t delay tim e . the re set delay tim e is program m a ble by c delay pin. due to the finite im pedance of r e s e t pin, th e pull up resistor should be bigger than 10k ? . monitor a voltage the sense input pin is conn ected to the m onitored system volta ge directly or through a resistor network (on m p q6400dg- 01). when the voltage on the pin is below v it , r e s e t is asserted. a threshold hy steresis w ill prev ent the chip from responding perturbation on sense pin. a 1nf to 10nf bypass capacitor should be put on this pin to increase its im m u nity to noise. a t y pical application of the m p q6400dg-01 is shown in figure 4. t w o external resistor s fo rm a voltage divider from m onitored voltage to gnd. its tap connects to the sense pin. the circuit can be used to m onitor any voltage higher than 0.4v. vcc sense gnd r2 1nf r1 v sen v out v it = (1+ ) r1 r2 0.4 reset MPQ6400dg-01 figure 4?MPQ6400dg-01 monitoring a user- defined voltage monitor mu ltiple sy ste m voltages the m anual reset ( m r ) can introduce another logic signal to control the r e s e t . when m r is a logic low (0.25v cc ), r e s e t will be asserte d . after both sense and m r are above their thresholds, r e s e t w ill be driv en to a lo gi c high af ter a reset delay tim e . the m r is inter nally connected to v cc through a 90k ? resistor so this pin can float. s ee how m u ltiple system voltages are m onitored by m r in figure 5. if the signal on m r isn?t up to v cc , there will be an addition al current th rough intern al 90k ? pull u p resistor. a logic-level fet can be used to m i nim i ze the lea k age, as sh own in figure 6. sense 1.2v 3.3v vcc sense vcc gnd gnd gnd c delay c delay v i/o v core dsp reset reset reset mr MPQ6400dg-12 MPQ6400dg-33 figure 5? MPQ6400 famil y monitoring multiple system voltages
MPQ6400 ? low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c i rc u i t MPQ6400 rev. 1 . 0 www.monolithicpower.com 9 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. reset mr gnd 3.3v sense vcc MPQ6400dg-33 figure 6?minimizing i cc when m r signal isn?t over v cc b y external mosfet programma ble reset dela y time the reset delay tim e can be pro g ram m ed b y c delay configure. whe n c delay is connected to vcc through a resistor between 50k ? a nd 200k ? , the delay tim e is 380m s. when c delay floated, the delay tim e is 24m s. in addition, a capacitor connected c delay to gnd could be used to get the user?s program m abl e delay time from 2.1m s to 10s. the three configures can be found in fig u re 7(a)(b)(c). reset gnd 3.3v c dela y c dela y c dela y c dela y 50k sense vcc reset gnd 3.3v (a) (b) (c) 380ms delay 24ms delay sense vcc reset gnd 3.3v sense vcc MPQ6400dg-33 MPQ6400dg-33 MPQ6400dg-33 figure 7?programmab l e configurations to the reset dela y time the external capacitor c delay m u st be larger tha n 150pf. for a given d e lay tim e , the capacito r value can be calculated using the followin g equation: 107 s 4.99 s t nf c d delay ? ? ? ? ? )] ( 10 ) ( [ ) ( 4 the reset d e lay tim e is determ i ned by the charge tim e of exter nal capacito r. while sense is above v it and m r is a logic hig h , the internal 140na current sour ce is enabled and star ts to charg e the capacitor to set the delay time. when the capacitor voltage rises to 1.13v, the r e s e t is de- asserted. t he capacitor will be discharged when the r e s e t is again asserted. stray capacitance m a y cause errors of th e delay tim e . a ceram i c capacitor with low leakage is stro ngl y recom m end ed. sense voltage transients immunity the m p q6 400 can be im m une to sense pin short negative transient. the m axi m um i m m u ne duration is 17us while overdrive is 5%. a shorter negative transient ca n not assert the r e s e t output. the effective d u ration is r e lative to t h e threshold overdrive, as shown in fig u re 8. m axi m u m s e n s e t r an s i en t d ur a t i on v s . s e n s e thr e s hol d o v er d r i v e v o l t ag e 1 10 100 01 0 2 0 3 0 4 0 5 0 6 0 figure 8 ?maximum transient duration vs. sense threshold overdrive voltage
MPQ6400 ? low qu iesc en t c urren t pr ogra mma b l e-d ela y su per visor y c i rc u i t 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. MPQ6400 rev. 1 . 0 www.monolithicpower.com 10 12/5/2011 mps proprietar y information. pate nt protec ted. un authorized photo c op y and d uplication prohibited. ? 2011 mps. all rights reserved. package informatio n qfn6 (2 x 2mm) side vi ew top vi ew 1 6 4 3 botto m view 1.90 2.10 0.65 0.85 1.9 0 2. 1 0 1.25 1.45 0.65 bsc 0.20 0.30 0.80 1.00 0. 0 0 0.05 0.20 re f pin 1 id ma rkin g 0.70 0.6 5 0.25 re commen ded land pa tter n 1.90 no te: 1) al l dimen s ion s are in m i llim e t e rs. 2) expo sed p a ddle size do es not include mold flash. 3) lead coplan arit y shal l be 0 .10 mill imeter max. 4) jedec r e feren c e is mo-229, va riat ion vccc . 5) dra wing is not t o sca l e. pin 1 id see detail a 1.40 0. 7 0 pin 1 id op tion a 0.30x 45o typ. pin 1 id opt ion b r0.2 0 typ. detail a 0.30 0.40 pin 1 id in dex area
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