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MP6219 5v, 1a ? 2a programmable current limit power distribution switch MP6219 rev.0.9 3 www.monolithicpower.com 1 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. the future of analog ic t echnology descri ption the MP6219 is a prote c tion device designed t o protect circu i try on the output from transients on input. it also protects inp ut from und esired short s and transien t s coming fr om the output. the mp621 9 is an inte grated power switch with programma ble current limit. the max load at the output is cur r ent limited. this is acco mplished by utilizing a se nse fet top o logy. the magnitude of the current limit is controlled b y an external resistor. an internal charge pump drives the gate of the power device. it feature s a 44m ? swi t c h f o r hi gh efficiency and requires minimal external components. the mp62 19 features current pr otection an d thermal shutdown for fault control. it also involves uvlo and o u tput over voltage prote c tion. the mp621 9 is available in an 8-pin soic e package. features ? integrated 4 4 m ? fet ? adjustable current limit to 2a ? optimized for 5v inputs ? enable active high ? 1.1ms soft-start rise time ? ul file # e322138 appli c ations ? usb po wer distribution ? pci bus po wer ? notebook pc ? inrush current limit ? heavy capa citive loads typical application MP6219 in out out out n.c. i prgm en/f aul t r prgm gnd 8 1 2 3 4 7 6 5 input +5v t o usb peripheral on/off input or fault output ul recognized component ?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. http://
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 2 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. ordering information part number* package top marking free air temperature ( t a ) MP6219dn soic8e (exposed pad) MP6219dn ?40 c to +85 c * for tap e & reel, ad d suf f ix ?z (e.g. MP6219 dn?z). for rohs co mpliant pa ckaging, ad d su ffix ?lf (e.g. MP6219 dn? l f?z ) package reference 1 2 3 4 8 7 6 5 top view absolute m a xi mum ratings (1) in, out, i prgm ................................................ 8v en/fault ..................................................... 6v junction temperature? ???.?40 c to +150 c continuous power dissipation (t a = +25c) (2) ............................................................. 2.5w storage temperature .............. ?65c to +155 c recommended operating conditions input voltage???????????.5v 10 % operating junct.temp. ........... .-40 c to +125 c thermal resistance (3 ) ja jc soic8e ................................... 50 ...... 10 ... 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 . exceedi ng the maximum allow able po w e r 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) measured on je sd51-7 4 - la y e r b oard.
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 3 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. electri c al characteristi cs v in = 5v, r prg m =24 ? , c out = 10 f, t j =25 c, un less otherwise noted. parameters symbol condition min typ max units power fet delay time t dl y enabling of chip to i d =100ma, 1 2 ? resi st iv e load 0.2 ms t j =25 c 44 82 on r e si st an ce r dson t j =80 c, note 4 95 m ? off state output voltage v off v in =8vdc, en able = 0vd c , r l =5 00 ? 120 mv thermal latch shutdown te mperature t sd 175 c under/over voltage protection output clamping voltage v clamp overvoltage protectio n v in =8v 5.95 6.65 7.35 v under voltage lockout v uvlo turn on, v in rising 3.2 3.6 4.0 v und e r voltag e locko ut (uvlo) hysteresi s v hy s t 0.1 v current limit current limit i lim-ss r prgm =24 ? 1.4 2.0 2.7 a trip current i li m - ol r prgm =24 ? 3.0 a slew rate output ri se time t r note 5 1.1 ms en/fault low l e vel input voltage v il output di sabl ed 0.5 v intermediate level input voltage v i (int) therm a l faul t, output disable d 0.80 1.6 2.0 v high l e vel input voltage v ih output enabl ed 2.5 v high state m a ximum voltage v i ( m ax) 4.8 v low level input current (sink) i il v enable =0v -28 -50 a maximum fa nout for fault signal total numb e r of chips that can b e co nne cted for simultan eou s shutdo wn 3 units maximum vol t age on enab le pin v max note 6 v in v total device device operational, no load 1.5 2.0 supply cu rre nt i q therm a l shut down 0.5 ma minimum op erating volta ge for uvlo v mi n enable < 0.5v 3.0 v notes : 4) guar anteed b y d e sign. 5) measured fr om 1 0% to 90 %. 6) maximum input voltage to be 6. 0v if vin 6.0v. maximum input voltage to be vi n if vin 6.0v.
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 4 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. pin functio n s pin # name description 1 in input to the device. 5v nominal input voltage 2, 3, 4 out this pin is the out put of the internal power fet. 5 i prg m a resistor between this pin and the output pin sets the overload and short circuit current limit levels. 6 n.c. no connect. 7 en/fault the en/fault pin is a tri-state, bi-directi onal interface. it can be used to enable the output of the device by floati ng the pin, or disable the chip by pulling it to ground (using an open drain or open collector devic e). if a thermal fault occurs, the voltage on this pin will go to an intermediate state to signal a monitoring circuit that the device is in thermal shutdown. 8 gnd exposed pa d neg a tive inp u t voltage to the devi ce. t h is i s u s ed a s the intern al referen c e fo r t he ic. con n e c t expose d pad to gnd plan e proper the r mal perfo rman ce.
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 5 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. typical perfo r manc e characteristics v in = 5v, v en =3.3v, r prgm =24 ? , c out =10uf, t a =25c, unless otherwise noted. input vot age (v) input vot age (v) input votage (v) 3.5 4.5 5.5 6 5 4 load current (a) supply current, output d i s abled vs. input voltage v en =0v input voltage (v) supply current (ma) trip current (a) supply current (ua) input voltage (v) static drain-source on-state resistance v s . input voltage i out =0.5a peak current (a) input to output voltage vs. load current input to output vol t age(mv) supply current, output enabled vs. input v oltage v en =3.3v , no load 1.05 1.1 1.15 1.2 1.25 1.3 3.5 4 4.5 5 5.5 6 300 320 340 360 51 52 53 54 55 56 57 58 59 60 3.5 4 4.5 5 5.5 6 0 20 40 60 80 100 120 140 160 180 0 0.5 1 1.5 2 2.5 3 hold current vs. input voltage 1.6 1.9 2.2 2.5 3.5 4 4.5 5 5.5 6 hold current(a) trip current vs. input voltage 1.5 2 2.5 3 3.5 3.5 4 4.5 5 5.5 6 current limit response vs. peak current no c out 0 5 10 15 20 25 30 051 01 52 02 53 0 response time(u s ) trip current and hold current vs. r prgm 0 1 2 3 4 0 20 40 60 80 100 120 trip current and hold current(a) v in =5 v v in = 4.5v v in =4 v v in = 5.5v trip current hold current
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 6 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. typical perfo r manc e characteristics (continued ) v in = 5v, v en =3.3v, r prgm =24 ? , c out =10uf, t a =25c, unless otherwise noted. en 2v/div v out 2v/div en 2v/div v out 2v/div en 2v/div i out 1a/div en 2v/div i out 1a/div i out 1a/div v out 2v/div v out 2v/div i out 2a/div en 2v/div en 2v/div v out 2v/div en 2v/div v out 2v/div i out 1a/div 400us/div 200us/div 400us/div 40us/div 400us/div 100ms/div 2ms/div 1000uf 470uf 2200uf 100us/div 4ms/div turn off delay and fall time with 1uf load c out =1uf, no load trip current with ramped load on enabled device short circuit current device enabled into short and thermal shut down en floating short circuit current device enabled into short t urn on delay and rise t ime with 1uf load c out =1uf , no load
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 7 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. typical perfo r manc e characteristics (continued ) v in = 5v, v en =3.3v, r prgm =24 ? , c out =10uf, t a =25c, unless otherwise noted. v out 2v/div i out 5a/div 100us/div en 5v/div v out 2v/div i out 1a/div 200ms/div t rip current=3.13a en=1.5v hold current=2.2a thermal shutdown
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 8 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. block diagram out in en/ f aul t enable thermal shutdown uvlo v oltage clamp dv/dt control current limit charge pump i-limit gnd figure 1?functional block diagram
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 9 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. cur rent limit the desire d current limit is a fu nction of t h e external current limit resistor. t a b l e1 -c urre n t l i m i t vs . c u rr e n t li mi t r e si s t or (v in =5 v) curre nt limit resis t or 24 ? 50 ? 100 ? trip curre nt 3.0a 2.25a 2.0a hold cur ren t 2.0a 1.1a 0.6a when the part is a c tive, if load reaches trip current (minimum thre shold curre nt triggerin g overcurrent protection) or a short is present, the part switch es into to a constant- c urrent (hold current) mode. part will be shutdown only if the overcurrent condit i on stays lon g enough to trigger ther mal protection. however, when the part is powered up by v cc or en, the loa d current should be smaller than hold current. otherwise, the part can?t b e fully turned on. in a typica l applicatio n using a current limit resistor of 2 4 ? , the trip current will be 3a and the hold current will be 2a. if the d e vice i s in its normal operating state and passi ng 2a it will need to dissipate only 176mw wit h the very l o w on resistan ce of 44 m ? . for t he packag e dissipat ion o f 50c/watt, the temperature rise will only be + 8.8c. co mbined with a 25c ambient , this is o n ly 33.8c total package temperature. during a short circuit condition, th e device now has 5v across it and the hold current clamps at 2a and therefore must dissipa te 10w. at 50c/watt, if uncontrolle d, the temp erature would rise above the thermal protection threshold (+175c) and the device will shutd o wn to cause the temperature to drop. proper heat sink must be used if t he device is intended to supply the hold curr ent and not shutdown. without a heat sink, hold current should be maintained below 600ma at + 25 c and below 3 60ma at +85c to prevent the device from activating the thermal shutdown feature. en/fault pin the en/fault pin is a bi-directio nal three le ve l i/o with a weak pull u p current (2 8ua typical). the three levels are low, mid and high. it functions to enable/disa ble the part and to relay fault information. en/fault pin as an input: 1. low and mid disable th e part. 2. low, in ad dition to disabling the part, clears the fa ult flag. 3. high enable s the part (if the fault flag is clear). en/fault pin as an outpu t: 1. the pull u p current may (if not over ridden) allo w a ?wired nor? pull up to enable the p a rt. 2. an under vo ltage will cause a low o n the en/fault pin, and will cle a r the fault fl ag. 3. a thermal fault will cause a mid level on the en/fault pin, and will set the fault flag. the en/fault line must be above the mid level for the output to be turned o n . the fault fla g is a intern al flip-flo p th at can be se t or reset und er various conditions: 1. thermal sh utdown: set fault flag 2. under voltage: reset fau l t flag 3. low voltage on en/fault pin: reset fault flag 4. mid voltage on en/fault pin: no effect under a fault, the en/ fault pin is driven to t h e mid level. there are 4 types of faults, and ea ch fault ha s a direct and in direct effect on the en/f ault pin and the internal f ault flag. in a typical application where there are multiple MP6219 chips in a system, the en/ fault lines a r e typically connected toget her.
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch MP6219 rev.0.9 3 www.monolithicpower.com 10 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. table 2 -f aul t fun ctio n i n fluenc e i n ap plica t io n fault description internal action effect on fault pin effect on flag effect on secondary part short/over cu rre nt limit current none none none und e r voltag e output is turn ed off internally driv es en/fault pin to logi c low flag is res e t secondary part output is disabled, and fault flag is reset. over voltage limit output voltage non e non e none therm a l shut down shutdown pa rt. the part is lat c he d off until a uvlo or externally dri v en to grou nd. internally driv es en/fault pin to mid level flag is set secondary part output is disabled. unde r v o ltage l o ck out op erati o n if the supp ly (input) is be low the uvlo threshold, the output is disabled, a nd the fault line is drive n low. when the supply g oes above the uvlo threshold, th e output is enabled and the fault line is released. when the fault line is released it wil l be pulled h i gh by a 2 8ua current source. no external pull up resistor is re quired. in addit i on, the pull up voltage is limited to 5 volts. thermal prot ecti on when thermal protectio n is triggere d , the outpu t is disab l ed and the fault line is dr iven to the mid level. the thermal fault condit i on is lat c h ed (meaning th e fault flag is set), and the part wi ll remain latched off until the fault (e nable) line is brought low. cycling the power belo w the uvlo threshold will also rese t t he fault flag. pcb la yout pcb la yout is very important to achieve stable operation. please follo w these g u idelines a n d take below figure for reference. place r prgm close to i prgm pin and input ca p close to in pin. keep th e n/c pin flo a t. put vias in thermal pad and ensure enough copper ar ea near in an d out to achieve b e tter thermal performance. c1 gn d vi n vout c3 c2 en / f a u l t 7 8 6 5 1 2 4 3 in ou t ou t ou t gn d en / f a u lt n/ c i pr g m r pr g m gnd top la y e r bottom lay e r figure 2?pcb la y out
MP6219 ? programmabl e current li mit (2a) power dist ributi o n switch 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. MP6219 rev. 0. 93 www.monolithicpower.com 11 10/20/2010 mps proprietar y information. un a u t horized photoc op y and duplication prohibited. ? 2010 mps. all rights reserved. package informati o n soic8e (exposed pad) see detail "a" 0.0075(0.19) 0.0098(0.25) 0 . 050(1.27) bsc 0 . 013(0 .33) 0.020(0.51) se ating plane 0.000 (0.00 ) 0.006(0.15) 0.0 51(1.3 0) 0.067(1.70) top view front view side view bottom view note: 1 ) cont rol d i mension is in in ches. di mension in brac ket i s i n mill imeter s . 2 ) pac kage lengt h does not in clu de mold fla sh, protru s i on s or ga te bu rrs. 3 ) pac kage width does not include interle ad flash or protru sion s. 4 ) lea d copla nar ity (b ot tom of l e ads a fter formin g) shal l be 0. 004" in ches max. 5 ) dr awing conf or ms to jedec m s - 012, va riat ion ba. 6 ) dr awing is not to sc ale. 0.089(2.26) 0.101(2.56) 0.124(3.15) 0.136(3.45) recommended land pattern 0.213(5.40) 0.063(1.60) 0.050(1.27) 0.024(0.61) 0.103(2.62) 0.138(3.51) 0.150(3.80) 0.157(4.00) pin 1 id 0.189(4.80) 0.197(5.00) 0 . 228(5 .80) 0.244(6.20) 14 85 0.016 (0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.020(0.50) x 45 o 0.010(0.25) bsc gauge plane

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