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r1224n series pwm/vfm step-down dc/dc converter no.ea-0 96-0 6 1 1 02 outline the r1 224 n serie s are cmos-b ase d pwm step -d o w n dc /dc converte r co ntrolle rs with lo w su pply cu rrent. each of the s e ics con s ist s of an oscillato r , a pwm con t rol circuit, a referen c e volt age unit, an e rro r amplifie r , a pha se comp e n satio n ci rcuit, a sof t -st a rt circuit, a p r ote c tion circuit, a pwm/vfm a l ternative ci rcuit, a chip en able circuit, re sisto r s for o u tput volt age d e tect, and input vol t age dete c t ci rcuit. a low ri pple, high ef fi cien cy step -d own dc/ dc co nve r ter can be e a s ily com p o s e d of this ic wi th onl y seve ral external co mpone nt s, o r a po wer-tra n sistor , an ind u cto r , a diode an d ca p a citors. out put v o lt ag e i s fix ed or ca n be adj uste d with external re sisto r s (adj ust able types are without pwm/v f m alternativ e circuit). with a p w m/ vfm altern ative circuit, wh en the lo ad current is sm al l, the ope rati on is autom atically switchin g into the vfm oscillator from pwm oscill ator . therefore, the ef ficiency at sm all load current is i m proved. several types of the r1224nxxx, whi c h are wit hout a pwm/ vfm alternati v e circuit, are also available. if the term of maximum duty cycle ke ep s on a ce rt ai n time, the embed ded prote c tion circuit wo rks. t he prote c tion ci rcuit is re set-type protectio n circuit, and it works to re st a r t the operati on with sof t -st a rt and re peat this op eratio n until maximu m duty cycl e con d ition i s re leas ed. when the ca use of l a rge load current or som e th ing else i s rem o ved, the opera t ion is autom atica lly rele ased and return s to norm a l o peratio n. furthe r , built-in uvlo fun c tion wo rks when the inp u t volt age is e q ual or le ss than uvl o thresh old, it make s this ic be st a ndby and sup p re sses the consum ption current and av oid an un st a b l e operation. features ? supply current ................................................................ t y p. 20 a (r1224 nxx2e/f/m/l, r1224 n10 2 m) t y p. 30 a (r1224 nxx2g , r12 2 4 n 102 g ) t y p. 40 a (r1224 nxx2h, r12 2 4 n 102 h) ? s t andby current .............................................................. t y p. 0 a ? input v o lt age rang e ....................................................... 2.3v ~18.5v ? output v o lt age ra nge ..................................................... 1.2v to 6. 0v (r1224nxx2x) 1.0v to v in (r1224 n1 02x) ? output v o lt age ac curac y ................................................. 2.0% ? oscillator f r e quency ....................................................... t y p. 180khz (r1224nxx2 m, r1224n102m) t y p. 300khz (r1 224 nxx2 e/g , r1224 n102g ) t y p. 500khz (r1 224 nxx2 f/h, r12 24n102 h) ? ef fic i enc y ......................................................................... t y p. 90% ? low t e mperature-drif t coef fic i ent of output v o lt age...... t y p. 100 pp m/c ? pac k age .......................................................................... sot - 23-5 ? built-in sof t -st a rt func tion ............................................... t y p. 10ms ? built-in cu rr e n t limit circ ui t applications ? powe r sou r ce for hand-h e ld comm uni cation eq uip m ent, came ras, video instrum ent s su ch as vcrs, cam c o r de rs. ? powe r so urce for battery-p owe r ed e quip m ent. ? powe r so urce for hou sehol d electri c al a pplian c e s . 1
r1224n block diagram *fixed ou tp ut v o lt age t y pe os c am p vr e f vr e f v ou t ce v in ex t gnd pw m/ v f m cont rol s o ft s t a r t p r ot ect i on chi p e nabl e uv lo 5 4 2 1 3 *adjust a ble outpu t v o lt a g e t y pe os c am p vr e f vr e f v fb ce v in ex t gnd s o ft s t a r t p r ot ect i on chi p e nabl e uv lo 5 4 2 1 3 2
r1224 n selection guide in the r122 4 n seri es, th e output volt ag e, the o scill ator freque ncy , the option a l f unctio n , and the t api ng typ e for the ics can b e sele cted at the use r ' s req uest. the sel e ctio n can be ma de with desi gnat ing the p a rt numbe r as sho w n bel ow; r 1 2 2 4 n x x 2 x - x x - x part number a b c d e f c o d e c o n t en t s a de sign ation o f packa ge type; n: sot-2 3 -5 b setting outpu t voltage (v out ): stepwise sett ing with a ste p of 0.1v in the ran ge of 1 . 2v to 6.0v is possible. adjustabl e type; a = 10 m e a n s refere nce voltage = 1.0 v optional fu nction i s g/h/ m. c 2 : f i x e d d de sign ation o f optional fu nction e : 300khz, with a pwm/ vfm alternati v e circuit f : 500khz, with a pwm/vfm alternativ e circuit g : 300khz, without a pwm/vfm altern ative circuit h : 500khz, without a pwm/vfm altern ative circuit l : 180khz, with a pwm/vfm alternativ e circuit m :180khz, without a pwm / vfm alternat ive circuit e de sign ation o f taping type ; (refe r to tapi ng specifi c ati on)"t r" is prescrib ed a s a standa rd. f de sign ation o f compo s ition of pin plating -f: lead free plating 3
r1224n pin configuratio ? 12 3 4 5 ( m ar k s i de) pin description pin no sy mbol pin descrip tion 1 ce chip ena b le pin (?h ? activ e ) 2 g n d grou n d p i n 3 v out (v fb ) pin for monitoring o u tput v o lt age (fee dba ck v o lt ag e) 4 ext external t r an sisto r drive pin (cm o s ou tput) 5 v in powe r suppl y pin absolute maximum rating s sy m b o l i t e m ratin g u n i t v in v in supply voltage 20 v v ex t ext pin output v o lt age ? 0.3 to v in + 0. 3 v v ce ce pin input v o lt age ? 0.3 to v in + 0. 3 v v out v out /v fb pin input v o lt ag e ? 0.3 to v in + 0. 3 v i ex t ext pin inductor drive ou tput current 50 a p d powe r di ssi p a tion (sot -2 3-5 ) * 420 mw t o p t o p e r a t i n g t e m p e r a t u r e ra n g e ? 40 to + 85 c t s t g s t orage t e m peratu r e ran g e ? 55 to + 12 5 c * ) for po we r dissip ation, p l ease refe r to package informatio n to be describ ed. 4
r1224 n electrical characteristics ? topt=25 c sy m b o l i t e m conditio n s m i n . t y p . max. unit v in operating inp u t v o lt age 2 . 3 18.5 v v out s t ep-do wn o u tput v o lt age v in = v ce = v se t + 1.5v , i out =? 100ma whe n v se t < = 1.5v , v in = v ce = 3.0v v set 0.98 v set v set 1.02 v ? v out / ? t opt s t ep-do wn o u tput v o lt age t e mperature coef fici ent ? 40 c < = t opt < = 85 c 100 p p m / c f o s c o s c i l l a t o r f r e quen c y v in = v ce = v se t + 1.5v , i out =? 100ma whe n v se t < = 1.5, v in = v ce = 3.0 v l/m v e rsi o n e/g v e r s ion f/h v e rsion 144 240 400 180 300 500 216 360 600 kh z ? f o sc/ ? t opt oscillator f r e quen cy t e mperature coef fici ent ? 40 c < = t opt < = 85 c 0.2 % / c i dd1 supply cu rre nt 1 v in = v ce = v ou t = 18.5v e/f/l/m v e rsi on g versi on h versi on 20 30 40 50 60 80 a ist and b y s t andby cu r r e n t v in = 18.5v , v ce = 0v , v out = 0v 0 . 0 0 . 5 a i ex t h ext ?h? o u tp ut current v in = 8v , v ex t = 7.9v , v out = 8v , v ce = 8v ? 17 ? 10 ma i ex t l ext ?l? outp ut current v in = 8v , v ex t = 0.1v , v out = 0v , v ce = 8v 2 0 3 0 m a i ce h ce ?h? input curre n t v in = v ce = v ou t = 18.5v 0 . 0 0 . 5 a i ce l ce ?l? input current v in = v out = 18. 5v , v ce = 0v ? 0.5 0 . 0 a v ce h ce ?h? input v o lt age v in = 8v , v out = 0v 1 . 5 v v ce l ce ?l? in put v o lt age v in = 8v , v out = 0v 0 . 3 v maxd ty oscillator m a ximum duty cy cle 1 0 0 % vfmd ty vfm duty cyc l e e/f/l v e rs ion 35 % v uv l o 1 u v l o v o lt ag e v in = v ce = 2.5v to 1.5v , v out = 0v 1 . 8 2 . 0 2 . 2 v v uv l o 2 u v l o relea s e v o lt a g e v in = v ce = 1.5v to 2.5v , v out = 0v v uv l o 1 + 0.1 2 . 3 v ts ta r t d e l a y t i m e b y s o ft - s ta r t f u n c t i o n v in = v se t + 1.5 v , i out =? 10m a v ce = 0v v set + 1.5v 5 1 0 2 0 m s tprot delay t i me for protec tion c i rc uit v in = v ce = v se t + 1.5v v out = v set + 1.5v 0v 5 1 5 3 0 m s 5
r1224n ? topt=25 c sy m b o l i t e m conditio n s m i n . t y p . max. unit v in operating inp u t v o lt age 2 . 3 18.5 v v fb f e e d b ack v o l t a g e v in = v ce = 3.5v , i fb =? 10 0ma 0 . 9 8 1 . 0 0 1.02 v ? v fb / ? t opt feedb ack v o l t age t e mperature coef fici ent ? 40 c < = t opt < = 85 c 100 p p m / c f o s c o s c i l l a t o r f r e quen c y v in = v ce = 3.5v , i fb =? 10 0ma m v e rsi on g v e rsion h v e rsion 144 240 400 180 300 500 216 360 600 kh z ? f o sc/ ? t opt oscillator f r e quen cy t e mperature coef fici ent ? 40 c < = t opt < = 85 c 0.2 % / c i dd1 supply cu rre nt 1 v in = v ce = v fb = 18.5v m v e rsi on g v e rsion h v e rsion 20 30 40 50 60 80 a ist and b y s t andby cu r r e n t v in = 18.5v , v ce = 0v , v fb = 0v 0 . 0 0 . 5 a i ex t h ext ?h? o u tp ut current v in = 8v , v ex t = 7.9v , v fb = 8v , v ce = 8v ? 17 ? 10 ma i ex t l ext ?l? outp ut current v in = 8v , v ex t = 0.1v , v fb = 0v , v ce = 8v 2 0 3 0 m a i ce h ce ?h? input curre n t v in = v ce = v fb = 18.5v 0 . 0 0 . 5 a i ce l ce ?l? input current v in = v fb = 18.5v , v ce = 0v ? 0.5 0 . 0 a v ce h ce ?h? input v o lt age v in = 8v , v fb = 0v 1 . 5 v v ce l ce ?l? in put v o lt age v in = 8v , v fb = 0v 0 . 3 v maxd ty oscillator m a ximum duty cycle 100 % v uv l o 1 u v l o v o lt ag e v in = v ce = 2.5v to 1.5v , v fb = 0v 1 . 8 2 . 0 2 . 2 v v uv l o 2 u v l o relea s e v o lt a g e v in = v ce = 1.5v to 2.5v , v fb = 0v v u v lo1 + 0.1 2 . 3 v ts ta r t d e l a y t i m e b y s o ft - s ta r t f u n c t i o n v in = 2.5v , i fb =? 10ma v ce = 0v 2.5 v 5 1 0 2 0 m s tprot delay t i me for protec tion c i rc uit v in = v ce = 2.5v v fb = 2.5v 0v 5 1 5 3 0 m s 6
r1224 n typical appli cation and application hints (1) fixed outpu t v o lt age t y p e (r1 224 nx x 2 e/f/g/h/l/m excep t xx =10 ) ce con t rol r 1224n ext gnd v out v in ce c3 l lo ad c1 r1 c2 pm o s sd 5 1 2 3 4 pmos: ha t1 044m (hit a c h i ) l : cr10 5 -2 70 mc (sumi da, 27 h) sd1 : rb063l -30 (ro h m) c3 : 47 f (t ant alum t y pe) c1 : 10 f (cera m ic t y pe ) c2 : 0.1 f (cera m ic t y pe ) r1 : 10 ? (2) adjust a b le o u tpu t t y pe (r12 24 n102 g / h/m) examp l e: outp ut v o lt age = 3.2v ce con t rol c3 l lo ad c1 r1 c2 pm o s sd c4 r3 r4 r2 r 1224n ext gnd v fb v in ce 5 1 2 3 4 pmos: ha t1 044m (hit a c h i ) l : cr10 5 -2 70 mc (sumi da, 27 h) sd1 : rb063l -30 (ro h m) c3 : 47 f (t ant alum t y pe) c1 : 10 f (cera m ic t y pe ) c2 : 0.1 f (cera m ic t y pe ) c4: 1000 pf (ceramic t y p e ) r1 : 10 ? , r 2 = 22k ? , r3= 2 .7k ? , r4= 3 3k ? 7
r1224n whe n you use these ics, consi der the fo llowing i s sue s ; ? as sho w n in the blo ck dia g ram, a p a ra sitic di ode i s f o rme d in e a ch termin al, ea ch of the s e di ode s is not fo rmed for load cu rre n t, therefore do not u s e it i n su ch a way . whe n you co ntrol t he ce p i n by anoth e r power sup p ly , do not make it s ?h? level mo re than the volt age level of v in pin. ? set external comp one nt s as clo s e as p o ssible to th e ic an d mini mize th e con nectio n bet ween the comp onent s and the ic. i n p a rticul ar , a ca p a citor should b e con necte d to v ou t pin with th e minimum conne ction. m a ke suf f icie nt gro und and reinf o rce su pplyin g . a large swi t chi ng current could flow th roug h the co nne ction of powe r sup p ly , an in ducto r and th e con n e c tion of v out . if the impedan ce o f the conne cti on of power supply is hig h , the volt age level of powe r su p p ly of the ic fluctuate s with the switching current. this may cause u n st a b le op era t ion of the ic. ? prote c tion ci rcuit may work if the maximum duty cycl e co ntinue for the time defined in the electrica l cha r a c teri stics. on ce af te r stop ping th e output volt age, output will re st a r t with sof t -st a rt operation. if the dif f eren ce bet wee n input volt age a nd ou tput volt age is sm all, the protectio n ci rcuit may work. ? u s e ca p a cit o rs wit h a c a p a cit y of 22 p f or mo re f o r v out pi n, an d with go od hig h freq uen cy chara c te risti c s su ch as t ant alum cap a citors. w e reco mmen d you to use ou tput cap a cito rs with an all o wabl e volt age at least twice as much a s sett ing output volt age. this is becau se the r e may be a ca se wh ere a spike-sha p ed high volt a ge is gene rated by an indu ctor when an extern al transi s to r is on an d of f. ? ch oo se an i ndu ctor that has suf f icie nt ly small d.c. resi st an ce a n d large all o wable current and is h a rd t o rea c h magneti c sat u ration. an d if the value of induct a n c e of an inducto r is extremel y small, the i lx may ex cee d t he absolute max i mum rating a t the maximum loading. use an ind u ct or with ap pro p riate ind u ct a n ce. ? use a dio de of a schottky type with high switching sp eed, and al so p a y attention to it s current ca p a city . ? do n o t use t h is ic un der t he co ndition with v in volt age at equal o r less tha n minimum op erat ing volt age. ? wh en the th resh old level of an external power m o s f et is rathe r low a nd the d r ive-a b ility of volt age sup p li er i s small, if the output pin is short ci rc uit, input volt age m a y be equal o r less than uvlo detecto r thresh old. in this ca se, the d e v ise is re set with uvl o function th at is di f f ere n t from the reset-protectio n fu nction ca use d b y maximum dut y cycle. ? with the pwm/vfm altern ative circuit, whe n the o n duty cy cle of swit chin g is 3 5 % or le ss, the r122 4n a l ters from pwm m ode to vfm mode (pul se ski p mode ). the purpo se of this circuit is raisi ng the ef ficien cy with a light load by ski pp ing the frequ ency and sup p re ssi ng the con s um pt ion curre n t. however , the rati o of output volt age again s t inp u t volt age i s 35 % or le ss, (e x. v in >8.6v a nd v out =3.0v ) even if the l a rge cu rrent may be lo ade d, the ic ke ep s it s v f m mod e . as a re sult, freq uen cy might be de crea sed , and o scill ation waveform might be u n st able. these phe no mena a r e the typical cha r a c teri stics of the ic with pwm/vfm altern ative circuit. the p e rfo r mance of po wer sou r ce ci rcui t s u s ing t hes e ics extremely depe n d s up on the p e riph eral circuit s . pay attention in the selecti on of the peri pheral ci rcui t s . in p a rticula r , desi gn the perip he ral ci rcuit s in a way tha t the values su ch as volt a ge, current, and power of eac h comp onent, pcb p a ttern s and the ic do not excee d their respe c ted rated value s . 8
r1224 n how to adjust output voltage and about phase compensation as for adju st able outp ut type, feedba ck pin (v fb ) volt age is cont ro lled to maint a in 1.0v . output v o lt ag e, v out is as f o llowin g equ a t ion: v out : r2 + r4 = v fb : r2 v out = v fb (r 2 + r4 )/r 2 thus, with ch angin g the value of r2 an d r4, out put volt age can b e set in the sp ecified rang e. in the dc/ dc conve r ter , wi th the load cu rre nt and exter nal com pon ent s su ch a s l and c, pha se mig h t be b ehind 180 de gree. in this case, the pha se m a rgin of the syst em will be le ss and st abilit y will be wo rse. t o prevent this, pha se m a rgi n sho u ld b e se cured with p r oce edin g the pha se. a pol e is fo rmed with external compon ent s l and c3. c3 l 1/2 ~ fpole a zero (si gnal back to ze ro) is formed with r4 an d c4. ? fzero~1/(2 r4 c4) for exampl e, if l = 27 h, c3 = 47f , the cu t of f frequency of the pole is app roximat e ly 4.5khz. t o make the cut of f freque ncy of the pol e as mu ch a s 4.5khz, set r4 = 33 k ? an d c4 = 100 0pf . if v out is s e t at 2.5v , r2 = 22 k ? is a ppro p riate. r3 prevent s feedb ack of the noise to v fb pin, about 2.7k ? is a ppro p riate value. ce con t rol c3 l lo ad c1 r1 c2 pm o s sd c4 r3 r4 r2 r 1224n ext gnd v fb v in ce 5 1 2 3 4 9
r1224n operation of step-down dc/dc conv erter and output current the step -do w n dc/dc con v erter ch arg e s energy in th e inducto r wh en lx transist o r is on, and discha r g e s the energy from t he ind u cto r when lx tran si stor i s o ff a nd control s with less en erg y loss, so tha t a lowe r o u tput volt age tha n the input volt age i s obt ain ed. the ope ration will be explaine d with referen c e to the follo wing diagram s: i out lx t r l sd v in i1 v out cl i2 gnd t = 1 / f o sc ton t of f tope n ilm i n ilm a x il s t ep 1: lx t r . turns o n and cu rrent il (=i1) flo w s, and ener gy is ch arg ed int o cl. at this moment, il increa se s from ilmin. (= 0) to reac h il max. in prop ortion to the o n -time pe riod (ton) of lx t r . s t ep 2: whe n lx t r . turn s of f, schottky diode (sd) turn s on in order that l maint a in s il at ilmax, a nd current il (=i2 ) flow s. s t ep 3: il de cre a ses grad ually an d rea c h e s il min. af ter a time peri od of top en, and s d tu rns of f, provid ed that in the contin uou s mode, next cycle st art s before il b e come s to 0 be cau s e tof f time is not enou gh. in this c a s e , il value is from this ilmin (> 0). in the case of pwm control system, t he output volt ag e is maint a in ed by contro ll ing the on-tim e period (to n ), with the oscillator freque ncy (fo s c) bein g mai n t a ine d co nst ant. discon t inuo us cond ucti on mode an d contin uou s condu ctio n mode the maximu m value (ilm ax) and th e minimum val ue (ilmin ) cu rre nt whi c h fl ow throug h the indu cto r is th e same a s tho s e whe n lx t r . is on an d when it is off . the dif f ere n ce betwe en il max and ilmi n, which is re pre s ente d by ? i; ? i = ilmax-ilmin = v ou t to p en/l = (v in -v ou t ) ton/l ................................... e quation 1 whe r ein, t = 1/fosc = ton+ tof f duty (%) = ton/ t 10 0 = ton fo s c 1 00 topen < = tof f in equation 1 , v out tope n/l and (v in -v ou t ) ton/l a r e respe c tively shown the cha nge of the cu rre nt at on, and the cha nge of the current a t off . whe n the out put cu rrent (i out ) is relative ly small, tope n0). the former m ode is refe rre d to as the di scon tinuou s mode and the latter mode is referred to a s cont inuou s mod e . 10
r1224 n in the continu ous mo de, when equatio n 1 is solv ed fo r ton and a s sumed that the solution i s tonc, tonc t u v ou t /v in ..................................................................................... equat ion 2 whe n ton r1224n external components 1. inducto r select an ind u ctor that pe ak current do es not excee d ilmax. if large r cu rrent than allo wabl e curre n t flows, magneti c sat u ration o c cu rs and ma ke transfo rm ef fici ency worse. whe n the loa d curre n t is d e finite, the smaller valu e of l, the large r the rippl e cu rre nt. provided th at the allo wabl e cu rrent is l a rge in that ca se a nd dc current is sm al l, therefore, for la rge outp u t curre n t, ef ficiency is b e tter than usin g a n indu ct or wit h a large valu e of l and vice versa. 2. diod e use a diod e with low v f (schottky type is re comme n ded.) an d hig h swit chin g speed. reverse volt a ge rating sho u ld be mo re than v in and current rating sho u ld be e q ual or mo re than ilmax. 3. ca p a citors as for c in , use a cap a cito r with lo w esr (equivale nt serie s resi st ance) a nd a cap a city of at least 1 0 f for st abl e ope rati on. c ou t ca n red u ce ri pple of output v o lt age, therefo r e 47 f or m o re value of t ant alu m type ca p a citor i s recomme nde d. 4. lx t r an si stor pc h power mosfet is required for this ic. it s bre a kdown volt age bet wee n gate an d sou r ce sh o u ld be a few v higher tha n input v o lt age . in the case o f input v o lt age is low , to turn on mosf et completel y , to use a mosfet with low thre sh old volt age is ef fe ctive. if a large load current is necessa ry for your appli c ation and im port a nt, choo se a mosfe t with low o n resi st a n ce for good ef ficie n c y . if a small load current is mainly neces sa ry for your a p p lication, cho o s e a m o sfe t with lo w gat e ca p a city fo r good ef fici en cy . maximum co ntinuou s drai n curre n t of mosfet sh o u ld be large r than pe ak current, ilmax. 12
r1224 n timing chart v ou t s e t out put v o l t age uv lo v o l t age i nput v o l t age ri s i ng t i m e uv lo res e t v ou t s e t out put v o l t age p r o t ect i on ci r c ui t del a y t i m e v ou t se t o u tp u t v o l t age v in ce ex t v ou t v ou t se t o u tp u t v o l t age s t abl e operat i o n s t abl e operat i o n s t abl e operat i on s o ft s t a r t s o ft s t a r t s o ft s t a r t s o ft s t a r t res e t p r ot e c t i on the timing chart sh own above de scri bes the cha nging p r o c e s s of input volt age ri sing, st abl e ope rat i ng, operating wit h large current, st able o peratin g, inp u t volt age falling, input volt age recovering, an d st able operating. first, until when the inpu t volt age (v in ) rea c he s uvlo volt age, the circuit insid e kee p s the condition of pre - st and by . sec o nd, af ter v in becom es beyon d the uvlo thresh old, sof t -s t a rt operatio n st art s , wh en the sof t -st a rt operation fini she s , the ope ration be co m e s st able. if too large cu rre nt flows through th e ci rc uit becau se o f short o r oth e r rea s on s, ext sign al ign o re s that du ri ng the delay time of prote c tion circuit. (t h e current value depen ds o n the circuit.) af ter the dela y time p a sse s, reset prote c tion wo rks, or ext signa l will be ?h?, then output wi ll turn of f, then sof t -st a rt operation st art s . af ter the sof t -st a rt operati on, ext signal will be ?l ?, but if the large current is stil l flowing, af ter the delay tim e of protection circuit p a sses , reset prot ection circuit will work agai n, the operati on will be co ntinuo u s ly repe ated unle ss the ca use of large current flowin g is not remov ed. once the ca u s e of the larg e curre n t flowing is rem o ve d, within the delay time, t he operation will be back to the st abl e one. if the timing for rele ase the large curre n t is in the pr otection p r o c ess, the operati on will be b a ck to the normal one af te r the sof t -st a rt ope ration. if the v in becomes l o wer t han the set v out , that sit uation is sa m e as la rg e cu rre nt co nditio n , so p r ote c tion circuit may b e ready to wo rk, therefore, af ter t he dela y time of protection circuit, ext will be ?h?. furthe r , if the v in is lower t han uvl o volt age, the ci rcui t inside will be stop ped b y uvlo funct i on. af ter that, if v in rise s, unt il when the v in reache s uvlo volt a g e , the circuit inside kee p s the conditi on of spre-st a ndby . 13 then af ter v in beco m e s b e yond the uv lo threshold, sof t -st a rt op eration st art s , whe n the sof t -st a rt ope rati on finishe s , the operation be comes st a b le.
r1224n test ci rcuits output v o lt age, oscillator frequenc y , ce ? h ? input v o lt age, ce ? l ? input v o lt age, sof t -st a rt time r 1224n ex t gnd v out v in ce d1 c1 pm o s v o scil l os co pe c2 (v fb ) 2 31 5 4 l1 supply current 1 s t andb y current a r1224n gnd v out v in ce (v fb ) 2 3 1 5 a r1224n gnd v out v in ce (v fb ) 2 31 5 e x t ?h ? out put cu rren t e x t ?l? ou t put cu rren t a r 1224n gnd v ou t v in ce (v fb ) ext 2 3 1 5 4 a r 1224n gnd v ou t v in ce (v fb ) ext 2 31 5 4 ce ?h? inpu t curren t , ce ?l ? input cu rrent outpu t dela y t i me for pr otec tion circ uit a r 1224n gnd v out v in ce (v fb ) 2 3 1 5 r 1 224n gnd v out v in ce (v fb ) ext o scil l os co pe c2 2 31 5 4 pmos : ha t104 4m (hit a c hi ) l : cd10 4 -2 70 mc (sumi da, 27 h) sd1 : rb491d (rohm) c1 : 47 f (t ant alum t y pe) c2 : 47 f (t ant alum t y pe) 14
r1224 n typical characteristics 1)output voltage vs. output current (*note) r12 2 4 n 182e l=10h r12 2 4 n 182 f l=10h v in 5v v in 3.3v v in 5v v in 3.3v output current i out (ma) 0.1 1 1 0 10000 1000 100 1.830 1.850 1.810 1.790 1.770 1.750 output current l out (ma) output voltage v out (v) 0.1 1 1 0 100 1000 10000 1.850 1.770 1.790 1.810 1.830 1.750 output voltage v out (v) 1.830 1.850 1.810 1.790 1.770 1.750 output current l out (ma) output voltage v out (v) 0.1 1 1 0 100 1000 10000 1.830 1.850 1.810 1.790 1.770 1.750 output current l out (ma) output voltage v out (v) 0.1 1 1 0 100 1000 10000 1.830 1.850 1.810 1.790 1.770 1.750 output current l out (ma) output voltage v out (v) 0.1 1 1 0 100 1000 10000 1.830 1.850 1.810 1.790 1.770 1.750 output current l out (ma) output voltage v out (v) 0.1 1 1 0 100 1000 10000 r12 2 4 n 182 g l=10? r12 2 4 n 182 h l=10? v in 12v v in 5v v in 3.3v v in 12v v in 5v v in 3.3v r12 2 4 n 182 l l=27? r12 2 4 n 182 m l=27? v in 5v v in 3.3v v in 12v v in 5v v in 3.3v 15
r1224n r12 2 4 n 332e l=10h r12 2 4 n 332 f l=10h v in 7v v in 4.8v v in 7v v in 4.8v 3.34 3.40 3.30 3.28 3.24 3.20 output voltage v out (v) 0.1 1 1 0 100 1000 10000 3.38 3.36 3.32 3.26 3.22 output current l out (ma) 3.340 3.400 3.300 3.280 3.240 3.200 output voltage v out (v) 0.1 1 1 0 100 1000 10000 3.380 3.360 3.320 3.260 3.220 output current l out (ma) 3.340 3.400 3.300 3.280 3.240 3.200 output voltage v out (v) 0.1 1 1 0 100 1000 10000 3.380 3.360 3.320 3.260 3.220 output current l out (ma) 3.32 3.35 3.30 output current l out (ma) output voltage v out (v) 0.1 1 1 0 100 1000 10000 3.34 3.33 3.31 3.32 3.35 3.30 output current l out (ma) output voltage v out (v) 0.1 1 1 0 100 1000 10000 3.34 3.33 3.31 3.340 3.400 3.300 3.280 3.240 3.200 output voltage v out (v) 0.1 1 1 0 100 1000 10000 3.380 3.360 3.320 3.260 3.220 output current l out (ma) r12 2 4 n 332 g l=10? r12 2 4 n 332 g (v in =10v ) v in 15v v in 12v v in 4.8v r 1 22 4n 3 3 2 g ( v in =16v ) r12 2 4 n 332 h l=10? v in 15v v in 12v v in 4.8v 16
r1224 n r12 2 4 n 332 l l=27h r12 2 4 n 332 m l=27h v in 7v v in 4.8v v in 15v v in 12v v in 4.8v 3.340 3.400 3.300 3.280 3.240 3.200 output voltage v out (v) 0.1 1 1 0 100 1000 10000 3.380 3.360 3.320 3.260 3.220 output current l out (ma) 3.340 3.400 3.300 3.280 3.240 3.200 output voltage v out (v) 0.1 1 1 0 100 1000 10000 3.380 3.360 3.320 3.260 3.220 output current l out (ma) 3.32 3.35 3.30 output voltage v out (v) 3.34 3.33 3.31 output current l out (a) 0 1234 5 3.32 3.35 3.30 output voltage v out (v) 3.34 3.33 3.31 output current l out (a) 0 1234 5 3.32 3.35 3.30 output voltage v out (v) 3.34 3.33 3.31 output current l out (a) 0 123 4 5.040 5.100 5.000 4.980 4.940 4.900 output voltage v out (v) 0.1 1 1 0 100 1000 10000 5.080 5.060 5.020 4.960 4.920 output current l out (ma) r 1 22 4n 3 3 2 m ( v in = 5 v) r 1 22 4n 3 3 2 m ( v in =1 0v ) r 1 22 4n 3 3 2 m ( v in =1 8v) r12 2 4 n 502e l=10? v in 10v v in 6.5v 17
r1224n r12 2 4 n 502 f l=10h r12 2 4 n 502 g l=10h v in 10v v in 6.5v v in 15v v in 12v v in 6.5v 5.040 5.100 5.000 4.980 4.940 4.900 output voltage v out (v) 0.1 1 1 0 100 1000 10000 5.080 5.060 5.020 4.960 4.920 output current l out (ma) 5.040 5.100 5.000 4.980 4.940 4.900 output voltage v out (v) 0.1 1 1 0 100 1000 10000 5.080 5.060 5.020 4.960 4.920 output current l out (ma) 5.02 5.05 5.00 0.1 1 1 0 100 1000 10000 5.04 5.03 5.01 output voltage v out (v) output current l out (ma) 5.02 5.05 5.00 output current l out (ma) output voltage v out (v) 0.1 1 1 0 100 1000 10000 5.04 5.03 5.01 5.040 5.100 5.000 4.980 4.940 4.900 output voltage v out (v) 0.1 1 1 0 100 1000 10000 5.080 5.060 5.020 4.960 4.920 output current l out (ma) 5.040 5.100 5.000 4.980 4.940 4.900 output voltage v out (v) 0.1 1 1 0 100 1000 10000 5.080 5.060 5.020 4.960 4.920 output current l out (ma) r 1 22 4n 5 0 2 g ( v in =10v ) r12 2 4 n 502 g (v in =16v ) r12 2 4 n 502 h l=10? r12 2 4 n 502 l l=27? v in 15v v in 12v v in 6.5v v in 10v v in 6.5v 18
r1224 n r12 2 4 n 502 m l=27h v in 15v v in 12v v in 6.5v *note : t y p i c a l c h ar ac ter i s t ic s 1) ar e obtain ed with us in g the f o l l o w ing c o m p one nt s ; pmo s : irf74 0 6 ( i r) l : cdrh1 27-1 00m c (sum i d a: 10 h ) sd : rb0 8 3l- 20 ( r o h m ) c1 : 25 sc47 ( s a n y o / o s -c on : 47f/25 v ) 2 c2 : 0.1f ( c er am ic t y p e ) c3 : 10 sa 220 ( s an y o /o s- c on: 220f / 1 0 v ) r1 : 10 ? 5.040 5.100 5.000 4.980 4.940 4.900 output voltage v out (v) 0.1 1 1 0 100 1000 10000 5.080 5.060 5.020 4.960 4.920 output current l out (ma) output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency 19
r1224n r 1 22 4n 1 8 2 g ( v in =12v ) cdrh12 7-1 0 h r12 2 4 n 182 h (v in =3.3v) cdr h1 27- 1 0 h output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency 20
r1224 n r 1 22 4n 1 8 2 m ( v in =3.3v ) cdr h12 7 - 27 h r12 2 4 n 182 m (v in =5.0v ) cdr h12 7 - 27 h output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency 21
r1224n r 1 22 4n 3 3 2 f ( v in =4.8v) cdr h1 27- 1 0 h r12 2 4 n 332 g (v in =12v ) cdrh12 7-1 0 h output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency 22
r1224 n r 1 22 4n 3 3 2 h ( v in =12v ) cdrh12 7-1 0 h r12 2 4 n 332 h (v in =4.8v) cdr h1 27- 1 0 h output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency 23
r1224n r 1 22 4n 3 3 2 m ( v in =4.8v ) cdr h12 7 - 27 h r12 2 4 n 332 m (v in =5v ) output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency 24
r1224 n r12 2 4 n 502e (v in =10v ) cdrh12 7-1 0 h r12 2 4 n 502 f (v in =6.5v) cdr h1 27- 1 0 h output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency 25
r1224n r 1 22 4n 5 0 2 g ( v in =12v ) cdrh12 7-1 0 h r12 2 4 n 502 g (v in =15v ) cdrh12 7-1 0 h output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency 26
r1224 n r 1 22 4n 5 0 2 l ( v in =10v ) cdrh12 7-2 7 h r12 2 4 n 502 m (v in =6.5v ) cdr h12 7 - 27 h output current l out (ma) 0.1 1 1 0 100 1000 10000 30 40 100 90 0 efficiency *note: t y pical cha r a c teri stics 2) a r e obt ai ned with using the f o llowin g co m pone nt s; pmos : irf7406 (i r) l : cdrh1 27-1 00mc (sumid a: 10h) c2 : 0.1f (ce r a m ic t y pe ) sd : rb083l -20 (ro h m) c3 : 10sa220 (s anyo/os-con: 220f/10v) c1 : 25sc47 (sa n yo/os-con: 47f/25v) 2 r 1 : 1 0 ? 27
r1224n 3) ripple voltage vs. output current r12 2 4 n 182e l=10h r12 2 4 n 182 f l=10h v in 5v v in 3.3v v in 5v v in 3.3v 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 r12 2 4 n 182 g l=10? r12 2 4 n 182 h l=10? v in 12v v in 5v v in 3.3v 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 v in 12v v in 5v v in 3.3v 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 r12 2 4 n 182 l l=27? r12 2 4 n 182 m l=27? v in 5v v in 3.3v v in 12v v in 5v v in 3.3v 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 28
r1224 n r12 2 4 n 332e l=10h r12 2 4 n 332 f l=10h v in 7v v in 4.8v v in 7v v in 4.8v 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 60 70 50 40 30 20 10 0 output current l out (ma) ripple voltage vrpp(mv) 0.1 11 0 100 1000 10000 60 70 50 40 30 20 10 0 output current l out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 100 1000 10000 60 70 50 40 30 20 10 0 output current l out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 100 1000 10000 60 70 50 40 30 20 10 0 output current l out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 100 1000 10000 r12 2 4 n 332 g l=10? r12 2 4 n 332 h l=10? v in 15v v in 12v v in 4.8v v in 15v v in 12v v in 4.8v r12 2 4 n 332 l l=27? r12 2 4 n 332 m l=27? v in 7v v in 4.8v v in 15v v in 12v v in 4.8v 29
r1224n r12 2 4 n 502e l=10h r12 2 4 n 502 f l=10h v in 10v v in 6.5v v in 10v v in 6.5v 60 70 50 40 30 20 10 0 output current l out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 100 1000 10000 60 70 50 40 30 20 10 0 output current l out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 100 1000 10000 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 70 30 40 50 60 20 10 0 output current i out (ma) ripple voltage vrpp(mv) 0.1 1 1 0 10000 1000 100 r12 2 4 n 502 g l=10? r12 2 4 n 502 h l=10? v in 15v v in 12v v in 6.5v v in 15v v in 12v v in 6.5v r12 2 4 n 502 l l=27? r12 2 4 n 502 m l=27? v in 10v v in 6.5v v in 15v v in 12v v in 6.5v 30
r1224 n 4) output voltage vs. input voltage r12 2 4 n 182e l=10h r12 2 4 n 182 f l=10h 1ma 500ma 1ma 500ma 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 2.00 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 r12 2 4 n 182 g l=10? r12 2 4 n 182 h l=10? -1ma -500ma -1ma -500ma r12 2 4 n 182 l l=27? r12 2 4 n 182 m l=27? 1ma 500ma 1ma 500ma 31
r1224n r12 2 4 n 332e l=10h r12 2 4 n 332 f l=10h 1ma 500ma 1ma 500ma 3.40 3.34 3.36 3.38 3.32 3.30 3.28 3.26 3.24 3.22 3.20 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 3.40 3.34 3.36 3.38 3.32 3.30 3.28 3.26 3.24 3.22 3.20 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 3.40 3.34 3.36 3.38 3.32 3.30 3.28 3.26 3.24 3.22 3.20 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 3.40 3.34 3.36 3.38 3.32 3.30 3.28 3.26 3.24 3.22 3.20 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 3.40 3.34 3.36 3.38 3.32 3.30 3.28 3.26 3.24 3.22 3.20 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 3.40 3.34 3.36 3.38 3.32 3.30 3.28 3.26 3.24 3.22 3.20 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 r12 2 4 n 332 g l=10? r12 2 4 n 332 h l=10? -1ma -500ma -1ma -500ma r12 2 4 n 332 l l=27? r12 2 4 n 332 m l=27? 1ma 500ma 1ma 500ma 32
r1224 n r12 2 4 n 502e l=10h r12 2 4 n 502 f l=10h 1ma 500ma 1ma 500ma 5.20 5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 5.20 5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 5.20 5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 5.20 5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 5.20 5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 5.20 5.15 5.10 5.05 5.00 4.95 4.90 4.85 4.80 input voltage v in (v) output voltage v out (v) 0 5 10 15 20 r12 2 4 n 502 g l=10? r12 2 4 n 502 h l=10? -1ma -500ma -1ma -500ma r12 2 4 n 502 l l=27? r12 2 4 n 502 m l=27? 1ma 500ma 1ma 500ma 33
r1224n 5) output voltage vs. temperature r12 2 4 n 332e r12 2 4 n 122 f 3.33 3.32 3.31 3.30 3.29 3.28 3.27 temperature topt(?c) output voltage v out (v) -40 10 60 35 -15 85 1.210 1.205 1.200 1.195 1.190 temperature topt(?c) output voltage v out (v) -40 10 60 35 -15 85 r 1 22 4n 6 0 2 l r 1 22 4n 1 0 2 g 6.10 6.05 6.00 5.95 5.90 temperature topt(?c) output voltage v out (v) -40 10 60 35 -15 85 1.010 1.005 1.000 0.995 0.990 temperature topt(?c) output voltage v out (v) -40 10 60 35 -15 85 360 330 300 270 240 temperature topt(?c) oscillator frequency fosc(khz) -40 10 60 35 -15 85 600 550 500 450 400 temperature topt(?c) oscillator frequency fosc(khz) -40 10 35 -15 60 85 6) oscillator frequency vs. temp e rature r 1 22 4n 1 0 2 g r 1 22 4n 1 0 2 h 34
r1224 n r 1 22 4n 1 0 2 m 216 198 180 162 144 temperature topt(?c) oscillator frequency fosc(khz) -40 10 60 35 -15 85 25 20 15 10 5 0 temperature topt(?c) supply current1 iss1( 35
r1224n r 1 22 4n 1 0 2 h r 1 22 4n 1 0 2 m 60 50 40 30 20 10 0 temperature topt(?c) supply current1 iss1( 36
r1224 n 10) ext ?h? output current vs. temperature r12 2 4 n 332e -10 -15 -20 -25 temperature topt(?c) ext "h" output current i exth (ma) -40 10 60 35 -15 85 50 40 30 20 temperature topt(?c) ext "l" output current i extl (ma) -40 10 60 35 -15 85 time(sec) -0 -0 0 1e-04 2e-04 3e-04 4e-04 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 3.50 2.50 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) -0.04 -0.02 0 0.02 0.04 0.06 0.08 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.50 3.00 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) 11) ext ?l? output current vs. temperature r12 2 4 n 332e 12) load transient response r12 2 4 n 332 g l=10? v in =4.8v r12 2 4 n 332 g l=10? v in =4. 8 v 37
r1224n r12 2 4 n 332 g l=10h v in =10v r12 2 4 n 332 g l=10h v in =10v time(sec) -0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 3.50 2.50 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) -0.04 -0.02 0 0.02 0.04 0.06 0.08 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.50 3.00 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) -2e-04 -1e-04 0 1e-04 2e-04 3e-04 4e-04 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 3.50 2.50 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) -0.04 -0.02 0 0.02 0.04 0.06 0.08 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.50 3.00 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) -2e-04 -1e-04 0 1e-04 2e-04 3e-04 4e-04 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 3.50 2.50 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 3.50 2.50 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) -2e-04 -1e-04 0 0.0001 0.0002 0.0003 0.0004 r12 2 4 n 332 h l=10? v in =4.8v r12 2 4 n 332 h l=10? v in =4. 8 v r12 2 4 n 332 h l=10? v in =10v r12 2 4 n 332 h l=10? v in =10v 38
r1224 n r12 2 4 n 332 m l=27h v in =4.8v r12 2 4 n 332 m l=27h v in =4. 8 v time(sec) -2e-04 -1e-04 0 0.0001 0.0002 0.0003 0.0004 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 3.50 2.50 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) -0.04 -0.02 0 0.02 0.04 0.06 0.08 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.50 3.00 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) -2e-04 -1e-04 0 1e-04 2e-04 3e-04 4e-04 3.40 3.30 3.20 3.10 3.00 2.90 2.80 2.70 2.60 3.50 2.50 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) time(sec) -0.04 -0.02 0 0.02 0.04 0.06 0.08 3.45 3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.50 3.00 1800 1600 1400 1200 1000 800 600 400 200 2000 0 output voltage v out (v) output current i out (ma) 2.20 2.05 2.10 2.15 2.00 1.95 1.90 temperature topt(?c) -15 -40 10 35 85 60 uvlo voltage v uvlo (v) r12 2 4 n 332 m l=27? v in =10v r12 2 4 n 332 m l=27? v in =10v 12) uvlo voltage vs. temperature r12 2 4 n 332e 39
package information pe-sot-23-5-0610 ? sot-23-5 (sc-74a) unit: mm package dimensions 2.9 0.2 0.4 0.1 1.9 0.2 (0.95) (0.95) 54 123 +0.2 ? 0.1 1.6 +0.2 ? 0.1 1.1 +0.1 ? 0.05 0.15 2.80.3 0 to 0.1 0.8 0.1 0.2 min. taping specification 2.0max. 0.30.1 4.00.1 2.00.05 4.00.1 3.3 3.2 8.00.3 1.750.1 3.50.05 1.5 +0.1 0 ? 1.1 0.1 tr user direction of feed taping reel dimensions reuse reel (eiaj-rrm-08bc) (1reel=3000pcs) 2 0.5 11.4 1.0 9.0 0.3 13 0.2 ? 60 ? +1 0 180 ? 0 ? 1.5 21 0.8
package information pe-sot-23-5-0610 power dissipation (sot-23-5) this specification is at mounted on board. power dissipation (p d ) depends on conditions of mounting on board. this specification is based on the measurement at the condition below: (power dissipation (sot-23-5) is substitution of sot-23-6.) measurement conditions standard land pattern environment mounting on board (wind velocity=0m/s) board material glass cloth epoxy plactic (double sided) board dimensions 40mm 40mm 1.6mm copper ratio top side : approx. 50% , back side : approx. 50% through-hole 0.5mm 44pcs measurement result (topt=25 c,tjmax=125 c) standard land pattern free air power dissipation 420mw 250mw thermal resistance ja = (125 ? 25 c)/0.42w = 263 c/w 400 c/w 0 50 100 25 75 85 125 150 ambient temperature ( c) 0 200 100 300 400 250 420 500 600 power dissipation p d (mw) on board free air 40 40 power dissipation measurement board pattern ic mount area unit : mm recommended land pattern 0.7 max. 0.95 0.95 1.9 2.4 1.0 (unit: mm)
mark information me-r1224n-0612 r1224n series mark specification ? sot-23-5 (sc-74a) 1 2 3 4 5 1 , 2 , 3 : product code (refer to part number vs. product code) 4 , 5 : lot number ? part number vs. product code product code product code product code part number 1 2 3 part number 1 2 3 part number 1 2 3 r1224n102g g 1 0 r1224n102h h 1 0 r1224n102m m 1 0 r1224n122g g 1 2 r1224n122h h 1 2 r1224n122m m 1 2 r1224n152g g 1 5 r1224n132h h 1 3 r1224n152m m 1 5 r1224n182g g 1 8 r1224n152h h 1 5 r1224n182m m 1 8 r1224n252g g 2 5 r1224n182h h 1 8 r1224n252m m 2 5 r1224n302g g 3 0 r1224n252h h 2 5 r1224n302m m 3 0 r1224n332g g 3 3 r1224n302h h 3 0 r1224n312m m 3 1 r1224n362g g 3 6 r1224n332h h 3 3 r1224n332m m 3 3 r1224n402g g 4 0 r1224n362h h 3 6 r1224n502m m 5 0 r1224n502g g 5 0 r1224n402h h 4 0 r1224n552m m 5 5 r1224n552g g 5 5 r1224n462h h 4 6 r1224n602m m 6 0 r1224n602g g 6 0 r1224n472h h 4 7 r1224n122 l l 1 2 r1224n122e e 1 2 r1224n502h h 5 0 r1224n152 l l 1 5 r1224n152e e 1 5 r1224n552h h 5 5 r1224n182 l l 1 8 r1224n182e e 1 8 r1224n602h h 6 0 r1224n252 l l 2 5 r1224n222e e 2 2 r1224n122f f 1 2 r1224n302 l l 3 0 r1224n252e e 2 5 R1224N152F f 1 5 r1224n312 l l 3 1 r1224n262e e 2 6 r1224n182f f 1 8 r1224n332 l l 3 3 r1224n272e e 2 7 r1224n252f f 2 5 r1224n502 l l 5 0 r1224n302e e 3 0 r1224n262f f 2 6 r1224n552 l l 5 5 r1224n332e e 3 3 r1224n302f f 3 0 r1224n602 l l 6 0 r1224n502e e 5 0 r1224n322f f 3 2 r1224n552e e 5 5 r1224n332f f 3 3 r1224n602e e 6 0 r1224n362f f 3 6 r1224n502f f 5 0 r1224n552f f 5 5 r1224n602f f 6 0

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