unisonic technologies co., ltd LR2126 cm os ic www.unisonic.com.tw 1 of 7 copyright ? 2014 unisonic technologies co., ltd qw-r502-a60.a 1 a fast ultra low dropout linear regulator ? descripti on t he u t c l r 21 26 o perat e fro m a + 2 .5v ~ + 6 .0v in put su p p l y as fast ultra lo w - d r opo ut linear r egul ators. w i de output voltag e range optio ns are availa ble. t he fa st response characteristic to make ut c l r 2126 suitabl e for lo w volt age micr oproc essor ap plicati on. t he lo w q u i e scent current operatio n an d lo w dr op ou t qualit y cause d b y th e cmos process . t h e ut c l r 212 6 has ultra lo w dropout voltag e 300mv at 1a l oad curr ent t y p i call y. t he ground pi n current is t y p i c a ll y 60 ua at 1 m a load curr en t. output voltag e precisi on: m u lt ipl e out put voltag e opti o n s are avail abl e a nd r angi ng from 1. 2v ~ 5. 0v at ro om temperat ure w i th a guar antee d accurac y of 1.5 %, and 3.0% w h en var y i ng li ne, loa d and temp eratur e. ? features * ultra lo w dr o pout volta g e * lo w grou nd pin curre nt * 0.04% l o a d regu lati on * t he guaranteed output c u rrent is 1a dc * output voltag e accurac y 1 . 5% * lo w output c apacit or req u ir ed * over tempera t ure protection and over curre nt protection ? or de r i ng i n form at i o n ordering n u m ber package packing lead free halogen free LR2126l-xx-ab5-r LR2126g-xx-ab5-r sot89-5 tape reel http://
LR2126 cm os ic unisonic technologi es co., ltd 2 of 7 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 6 0 . a ? mar k ing i n formati on package voltage code marking sot89-5 ad: adj ? pin assignments ? p i n de sc ri pt i o n pin no pin name descript ion 1 en shutdown LR2126 enable; when the en pin connects to gnd will shutdown the LR2126; at normal operation, en must be tied to v dd through a 10k ? pull up resistor. 2 gnd ground. 3 adj adjusta b le vo ltage vers ion o n l y ? a res i stor di vider from this pin to the out pin and ground sets the output voltage. 4 in input voltage. 5 out output voltage. note: t he nc pin is el ectrical l y op en. t he nc pin can b e con n e cted to v in or gnd.
LR2126 cm os ic unisonic technologi es co., ltd 3 of 7 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 6 0 . a ? block di agra m
LR2126 cm os ic unisonic technologi es co., ltd 4 of 7 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 6 0 . a ? absolute maxi mu m ra ting s paramet er symbol rat i ngs unit input volta ge ( o peratin g) v in 2.5~ 7.0 v input volta ge ( s urvival) -0.3~ + 7 .5 v shutdo w n inp u t voltage v in ( shdn ) -0.3~v in +0.3 v output voltag e (survival), (no t e 1, 2) v out -0.3~+7.5 v i out (survival) short circuit pr otected maximum ope r ating c u rrent ( dc) 1 a po w e r diss i pat ion (not e 3) p d internally limit e d junctio n t e mperature t j + 125 c operatin g t e mperatur e t opr -40~ + 125 c storage t e mperature t st g -65~ + 150 c note: absolut e maximum ratings are tho s e values b e y ond w h ich the device cou l d be perman e n t l y dam age d. absol u te ma xi mum ratings ar e stress ratings onl y an d functi onal devic e op er atio n is not i m plie d. ? th er mal dat a parameter symbol ratings unit junction to ambient ja 160 c/w ? electric al ch ara cteri s tic s t j = 25c, v in = v ou t ( nom ) + 1v, i ou t = 10ma, c in = 4 . 7 f , c out = 4. 7 f, v en = v in -0.3v, unless oth e r w i s e specifie d.(note 4) paramet er symbol t es t conditions min t yp max unit output voltag e t o leranc e (no t e 5) v out 0ma i out 1a v out +1 v in 6.0v -1.5 -3 0 +1 .5 +3 % output voltage line r egu latio n (note 5) v out v out +1 v LR2126 cm os ic unisonic technologi es co., ltd 5 of 7 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 6 0 . a ? electric al ch ara cteri s tic s (cont.) notes: 1. t he l r 212 6 out put must be dio d e - clampe d to gr oun d. if used i n a dua l-sup p l y s y stem w h er e the r egu lator load is r e turne d to a neg ative suppl y. 2. bet w e en th e v in and v out terminals the output pmos structure cont ains a di od e. t h is diode is revers e biase d n o rmal l y . if the volt ag e at the output terminal is fo r ced to b e h i gh er than th e vo l t age at th e in p u t termina l this diod e w i ll get for w a r d bi ased. t h is diode can w i thsta nd 1amp of peak current an d 200ma of dc curren t ty p i ca l l y . 3. devices mu st be derated b a sed o n pack a ge t herma l resi stance at elev a t ed temperatur es. 4. cond itions f o r w h ic h the d e vice is i n ten d ed to be fu ncti onal is ind i cate d b y op eratin g ratings, but sp ecific performa nce l i m its isn?t b e g uara n teed. t o make sur e of s pecificati ons a nd test co nditi ons, rea d el ectrical charact e ristics . onl y for th e t e st cond itions l i sted t he gu aran teed s pecific a t ions ca n be a ppli ed. w h e n the device is not o perate d un der the liste d test conditi ons som e performanc e characteristics ma y d egr ade. 5. output volt age l i n e reg u l a tion is th e ch ang e in out put voltag e from the nomi n a l value w h ic h is due t o chan ge in the input lin e volta ge. w h ich is define d as the chan ge in out pu t voltage from the nomin al val u e due to c han ge in lo ad curr en t is output vo ltage l o a d reg u l a tion. t he loa d regu lati on a nd li ne re gu lati o n specificati on i n clude th e t y pic a l num ber o n l y. but, the limits for load and li ne reg u l a tion a r e incl ude d in t h e output volta ge tolera nce spec i f ication. 6. at w h ic h the output drops 2% bel o w th e normal val ue d r opo ut voltage is define d as the minimum in put to output differe nt ial volta ge. onl y to outpu t voltages of 2.5v a nd ab ove dro p out voltag e sp ecif icatio n ap pl ies. f o r output v o lt ages bel o w 2.5v, since th e minimum inp u t voltag e is 2.5 v , the dro p -out voltag e is not hing but the inp u t to output differe n t ial.
LR2126 cm os ic unisonic technologi es co., ltd 6 of 7 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 6 0 . a ? ty pic a l a ppli c a t io n ci rcui t
LR2126 cm os ic unisonic technologi es co., ltd 7 of 7 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 6 0 . a ? ty pic al c h ara ct e ris tic s dr op ou t vo l t a g e vs. ou tp ut cu rre nt dropout voltage, v d (mv) ou tput cur r ent, i ou t (m a) 0 50 100 150 200 250 300 0 250 50 0 7 50 10 00 350 utc a s s u m e s n o r e s p o n s i b ilit y f o r e q u ip m e n t f a ilu r e s t h a t r e s u lt f r o m u s in g p r o d u cts a t v a lu e s th a t ex ce ed, ev e n m o m e n t ar i l y , r a te d v a l u e s (s uch as m a x i m u m rati ngs , ope ra ti ng con d i t i o n ra ng es , o r oth e r pa ram e ters ) l i s ted i n pr odu cts s peci f i c a t i o n s of a ny and all u t c p r od ucts d es c r i bed o r contai ne d her ei n. ut c p r od ucts a r e n ot de s i gn ed f o r us e i n l i f e s upp ort a p p l i ances , de v i ce s o r s y s t em s w her e m a l f un cti o n o f thes e p r od ucts ca n b e rea s on abl y ex pected to re s u l t i n per s o n a l i n j u r y . r epr od ucti o n i n w hol e o r i n par t is p r oh i b i t e d w i tho u t the p r i o r w r i tte n con s ent o f the co pyr i ght ow n e r . t h e i n f o rm ati o n pre s en ted i n th i s do cum e n t d o e s no t f o r m pa rt of an y q uotati o n or con t ra ct, i s b e l i e v e d to b e a ccu rate and re l i a b l e a nd m a y be cha n g ed w i tho u t n o ti ce.
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