100 ma low dropout positive voltage regulator description the mik2950-xx/mik2951-xx is a low pow er voltage regulator. this dev ice excellent choice for use in battery pow ered application such as cordless telephone, radio control sy stems, and portable computers. the mik2950-xx/mik2951-xx features very low quiescent current ( 75a ty p.) and very low drop output voltage (ty p . 40mv at light load and 380mv at 100ma). this includes a tight initial toleranc e of 0.5% ty p., extremely good load and line regulation of 0.05 % ty p., and very low output temperature coefficient, making the mik 2950-xx/mik2951-xx useful as a low - pow er voltage reference. the error flag output feature is used as pow er-on reset for w a rn of a low output voltage, due to follow i ng batteries on input. other feature is the logic-compatible shutdow n input w h ich enable the regulator to be sw itched on and off. the mik2951-xx is available in 8-p in plastic packages. the regulator output voltage may be pin-strapped fo r a -xx volt or programmed from 1.24 volt to 29 volts w i th external pair of resistors. the mik2950-xx is offered in 3-pin to-92 pack age compatible w i th other fixed regulator. features ? high accuracy output voltage ? guaranteed 100ma output ? very low quiescent current ? low dropout voltage ? extremely tight load and line regulation ? very low temperature coefficient ? needs only 1mf for stability ? error flag w a rns of output dropout ? logic-controlled electronic shutdow n ? output programmable from 1.24 to 29v applications ? battery pow ered sy stems ? cordless telephones ? radio control sy stems ? portable/palm top/notebook computers ? portable consumer equipment ? portable instrumentation ? avionics ? automotive electronics ? smps post-regulator ? voltage reference ty pical application data 100 ma adjustable regulator package information top v i e w t o -92 plastic package (mik2950-xx only ) pin co n n ectio n mik2951-xx 1 8 3 6 4 5 in pu t ou t p u t fee d b a c k se n s e -x x v t a p sh u t d o w n err o r gr o u nd 2 7 mi k 2 9 5 1 - x x ????? absolute maximum ratings p a r a m e t e r m a x i m u m u n i t s pow e r dissipation internally limited w lead temperature (soldering, 5 seconds) 260 c storage temperature range -65 to+150 c operating junction temperature range -55 to +150 c input supply voltage -0.3 to +30 v feedback input voltage -1.5 to +30 v shutdow n input voltage -0.3 to +30 v error comparator output -0.3 to +30 v device selection guide (note 1) dev i ce output v o ltage mik2950-2.85, mi k 2 9 5 1 - 2 . 8 5 2 . 8 5 mik2950-3.0, mi k 2 9 5 1 - 3 . 0 3 . 0 mik2950-3.3, mi k 2 9 5 1 - 3 . 3 3 . 3 mik2950-5.0, mi k 2 9 5 1 - 5 . 0 5 . 0 note 1: other versions are ava ilable vout = 2.9v to 5.0v page 1 of 3 beijing estek electronics co.,ltd et- lp2950-xx et- lp2951-xx
description the mik2950-xx/mik2951-xx is a low pow er voltage regulator. this dev ice excellent choice for use in battery pow ered application such as cordless telephone, radio control sy stems, and portable computers. the mik2950-xx/mik2951-xx features very low quiescent current ( 75a ty p.) and very low drop output voltage (ty p . 40mv at light load and 380mv at 100ma). this includes a tight initial toleranc e of 0.5% ty p., extremely good load and line regulation of 0.05 % ty p., and very low output temperature coefficient, making the mik 2950-xx/mik2951-xx useful as a low - pow er voltage reference. the error flag output feature is used as pow er-on reset for w a rn of a low output voltage, due to follow i ng batteries on input. other feature is the logic-compatible shutdow n input w h ich enable the regulator to be sw itched on and off. the mik2951-xx is available in 8-p in plastic packages. the regulator output voltage may be pin-strapped fo r a -xx volt or programmed from 1.24 volt to 29 volts w i th external pair of resistors. the mik2950-xx is offered in 3-pin to-92 pack age compatible w i th other fixed regulator. features ? high accuracy output voltage ? guaranteed 100ma output ? very low quiescent current ? low dropout voltage ? extremely tight load and line regulation ? very low temperature coefficient ? needs only 1mf for stability ? error flag w a rns of output dropout ? logic-controlled electronic shutdow n ? output programmable from 1.24 to 29v applications ? battery pow ered sy stems ? cordless telephones ? radio control sy stems ? portable/palm top/notebook computers ? portable consumer equipment ? portable instrumentation ? avionics ? automotive electronics ? smps post-regulator ? voltage reference ty pical application data 100 ma adjustable regulator package information top v i e w t o -92 plastic package (mik2950-xx only ) pin co n n ectio n mik2951-xx 1 8 3 6 4 5 in pu t ou t p u t fee d b a c k se n s e -x x v t a p sh u t d o w n err o r gr o u nd 2 7 mi k 2 9 5 1 - x x ????? absolute maximum ratings p a r a m e t e r m a x i m u m u n i t s pow e r dissipation internally limited w lead temperature (soldering, 5 seconds) 260 c storage temperature range -65 to+150 c operating junction temperature range -55 to +150 c input supply voltage -0.3 to +30 v feedback input voltage -1.5 to +30 v shutdow n input voltage -0.3 to +30 v error comparator output -0.3 to +30 v device selection guide (note 1) dev i ce output v o ltage mik2950-2.85, mi k 2 9 5 1 - 2 . 8 5 2 . 8 5 mik2950-3.0, mi k 2 9 5 1 - 3 . 0 3 . 0 mik2950-3.3, mi k 2 9 5 1 - 3 . 3 3 . 3 mik2950-5.0, mi k 2 9 5 1 - 5 . 0 5 . 0 note 1: other versions are ava ilable vout = 2.9v to 5.0v page 1 of 3 beijing estek electronics co.,ltd et- lp2950-xx et- lp2951-xx
electrical characteristics electrical characteristics at ta = 25oc, vin = 15v; unless otherw i se noted p a r a m e t e r t e s t c o n d i t i o n s (note 2) m i n ty p m a x u n i t s output voltage -25 q c d t j d 85 q c full operating temperature 0.985 |v 0 | 0.98 |v 0 | v 0 1 . 0 1 5 |v 0 | 1.02 |v 0 | output voltage 100a d i l d 100ma, t j d t jm a x 0.976|v 0 | v 0 1 . 0 2 4 |v 0 | v output voltage temperature coefficient (note 1) 50 150 ppm/ q c line regulation (note 3) v 0 + 1v d v in d 30v (note 4) 0 . 0 4 0 . 4 % load regulation (note 3) 100a d i l d 100ma 0 . 1 0 . 3 % dropout voltage (note 5) i l =100 a i l =100 ma 5 0 380 80 450 mv ground current i l =100 a i l =100 ma 7 5 8 120 12 a ma dropout ground current v in =v 0 - 0.5v, i l =100 a 110 170 a current limit vout=0 160 200 ma thermal regulation 0.05 0.2 %/w output noise, 10hz to 100khz c l =1f c l =200f c l =3.3f (by pass=0.01 f pins 7 to 1 (mik2951-xx)) 4 3 0 160 100 v r m s 8-pin versions only reference v o l t a g e 1 . 2 1 1 . 2 3 5 1 . 2 6 reference voltage over temperature (note 6) 1.185 1.285 v feedback pin bias current 20 40 na reference voltage temperature coefficient (note 7) 50 ppm/ q c feedback pin bias current temperature coefficient 0.1 na/ q c error comparator output leakage current voh=30v 0.01 1.0 a output low voltage vin=4.5v, i ol =400 a 150 250 upper threshold voltage (note 8) 40 60 low er threshold voltage (note 8) 75 95 hy s t e r e s i s ( n o t e 8 ) 1 5 mv shutdow n input input logic voltage low (regulator on) high (regulator off) 2 1 . 3 0 . 7 v shut dow n pin input current v s =2.4v v s =30v 3 0 450 50 600 (note 9) v out = 5.0 v 3 10 3.3v d v out < 5.0 v 2 0 regulator output current in shutdow n 2.0v d v out < 3.3 v 3 0 a note 1: output or reference voltage temperature coefficients defined as the w o rst case voltage change divided by the total temp erature range. note 2: unless otherw i se specified all limits guaranteed for t j = 25 q c, vin = v 0 + 1v, i l = 100a and c l = 1f. additional conditions for the 8-pin versions are feedback tied to - xx v tap and output tied to output sense (v out = xx v) and v s hutdow n d 0.8 v note 3: regulations is measured at const ant junction temperature, using pulse testi ng w i th a low duty cy cle. changes in output voltage due to heating effects are covered under the specification for thermal regulation. note 4: line regulation for mik2951-xx is tested at 150 q c for i l = 1ma. for i l = 100a and t j = 125 q c, line regulation is guaranteed by design to 0.2%. see ty pical performanc e characteristics for line regulation versus temperature and load current. note 5: dropout voltage is defined as the input to output diffe rential at w h ich the output voltage drops 100mv below its nomina l value measured at 1v differential. at very low values of programm ed output voltage, the minimum input supply voltage of 2v (2.3v over temperature) must be taken into account. note 6: vref d vout d (vi n - 1v), 2.3v d vin d 30v, 100a d i l d 100ma, t j d t jm a x . note 7: output or reference voltage temperature coefficient is defined as the w o rst case voltage change divided by the total te mperature range. note 8: comparator thresholds are expressed in terms of a vo ltage differential at the feedback terminal below the nominal refer ence voltage measured at v 0 + 1v input. to express these thresholds in terms of output voltage change, multiply by the error amplifier page 2 of 3 beijing estek electronics co.,ltd et- lp2950-xx et- lp2951-xx
gain = v out /v re f = (r1 + r2)/r2. for example, at a programmed output voltage of 5v, the error output is guaranteed to go low w hen the output drops by 95mv x 5v/1.235v=384mv. thresholds remain c onstant as a percent of vout as vout is varied, w i th the dropout w a rning occurring at ty pically 5% below nominal, 7.5% guaranteed. note 9: v s hutdow n t 2v, vin d 30v, vout = 0, feedback pin tied to -xx v tap. block diagram and ty pical applications mik2950-xx mik2951-xx page 3 of 3 beijing estek electronics co.,ltd et- lp2950-xx et- lp2951-xx
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