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ksd-i0t007-001 1 october, 2010 rev. 01 s78dxxx low dropout voltage regulator (1.0a series) marking detail information [ sot-223 pkg marking ] device code grade & year & week code [ to-220f-3l & to-253-3l pkg marking ] auk logo grade & m code & year & week code device code product marking package s78dxxq s78dxxq sot-223 s78dxxd s78dxxd to-252-3l s78dxxpi s78dxxpi to-220f-3l description the s78dxxx is an efficient linear low dropout voltage regulator for various electronic equipment. it is designed to provide very low dropout voltage, and better than 2.4% output voltage accuracy. and the s78dxxx has various key features such as current limiting, over temperature shut-down, over voltage protection, and low noise performance with an low noise option. furthermore, it is available in adjustable or fixed output voltages in sot-223, to-252-3l and to-220f-3l packages. application ? consumer and personal electronics ? smps post-regulator / dc-to-dc modules ? high-efficiency linear power supplies features and benefits ? low dropout voltage for 1.0a output : [ max. 500mv]. ? built in thermal shut down circuit. ? built in ovp, clp circuit. ? low quiescent current : [typ. 2.0ma] ? ultra high level of esd [ built in esd protection cell ] mm : 400v / hbm 3kv s s e e m m i i c c o o n n d d u u c c t t o o r r http:// www.auk.co.kr ordering information sot-223 to-252-3l to-220f-3l s78dxxx ( ) gyww( ) equivalent circuit auk( ) g yww ( ) s78dxxx ( ) bias v ref + v in v out tsd, ovp, clp gnd
ksd-i0t007-001 2 october, 2010 rev. 01 product name v out operating temperature package s78d18q 1.8v -30~125 sot-223 s78d25q 2.5v -30~125 sot-223 s78d33q 3.3v -30~125 sot-223 s78d50q 5.0v -30~125 sot-223 S78D18D 1.8v -30~125 to-252-3l s78d25d 2.5v -30~125 to-252-3l s78d33d 3.3v -30~125 to-252-3l s78d50d 5.0v -30~125 to-252-3l s78d18pi 1.8v -30~125 to-220f-3l s78d25pi 2.5v -30~125 to-220f-3l s78d33pi 3.3v -30~125 to-220f-3l s78d50pi 5.0v -30~125 to-220f-3l ? pin configuration 1 2 3 4 1 2 3 sot-223 1: v in 2: gnd 3: v out 4: gnd to-252-3l 1: v in 2: gnd 3: v out 4: gnd to-220f-3l 1: v in 2: gnd 3: v out ? product line-up 2 1 3 4 s78dxxx
ksd-i0t007-001 3 october, 2010 rev. 01 parameter symbol limits unit input voltage v in 23.0 v sot-223 1.0(note1) to-252-3l 1.3(note2) power dissipation to-220f-3l p d 2.0(note2) w junction temperature t j 150 operate temperature range t opr -30 ~ +125 storage temperature range t stg -55 ~ +150 note 1 : mount on a glass epoxy circuit board of 36x18mm pad dimension of 50mm 2 note 2 : no heat-sink absolute maximum ratings indicate limits beyond which damage to the component may occur. electrical specifications do not apply when operating the devi ce outside of its operating ratings. the maximum allowable power dissipation is a function of the maximum junction temperature, t j(max) , the junction-to-ambient thermal resistance, ja , and the ambient temperature, ta. the maximum allowable power dissipation at any ambient temperature is calculated using: pd(max) = (t j(max) ? t a ) ja . exceeding the maximum allowable power dissipation will result in excessive die temperature, and the re gulator will go into thermal shutdown. parameter symbol limits unit supply input voltage v in vo + 0 . 5 ~ 2 0 v output current i out 1.0 a ? absolute maximum ratin g s ( ta = 25 ) `{ guaranteed operating conditions ( ta = 25 ) s78dxxx
ksd-i0t007-001 4 october, 2010 rev. 01 ( v in =v out +1.0v, c in = 0.33uf, c out = 47 uf, i out = 5ma, t j =25 ; unless noted ) specification no characteristics symbol condition min. typ. max. unit s78d18x 1.764 1.800 1.836 v s78d25x 2.450 2.500 2.550 v s78d33x 3.234 3.300 3.366 v 1 output voltage s78d50x v out variation from nominal v out 4.900 5.000 5.100 v 2 line regulation v line v in =v out +1v to 12v, i out =5ma - 0.05 0.5 % 3 load regulation v load v in =v out +1v, i out =5ma to 1a - 0.1 1.0 % 4 quiescent current i qc v in =v out +1v to 20v, i out =0ma - 2.0 5.0 ma 5 ripple rejection r r i out =50ma, f=120hz 55.0 65.0 - db 6 output noise voltage v no vin=vout+1v, iout=50ma, 10hz f 100khz - 100 - uvrms 7 dropout voltage v drop i out =1.0a - - 0.5 v 8 current limit i limit v in =v out +1v 1100 1300 - ma 1) c in should be required if regulators ar e located far from power supply filter 2) c o improves output stability and transient response ( c o 47uf ) ? electrical characteristics s78dxxx typical application s78dxxx v in r l v out c in c o + ?
ksd-i0t007-001 5 october, 2010 rev. 01 fig2. v out ? t j junction temperature [ ] output voltage v out [ma] 2.60 2.55 2.50 2.45 2.40 2.35 2.30 2.25 -30 0 30 60 90 120 150 v out = 2.5v s78dxxx -30 0 30 60 90 120 150 fig1. i qc ? t j junction temperature [ ] quiescent current i qc [ma] 2.80 2.60 2.40 2.20 2.00 1.80 1.60 1.40 fig3. v out ? v in input voltage v in [v] [ over-voltage protection ] output voltage v out [v] 0 5 10 15 20 25 30 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 v out = 2.5v fig4. v out ? t j junction temperature [ ] [ thermal shut-down protection ] output voltage v out [v] 25 50 75 100 125 150 175 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 v out = 2.5v
ksd-i0t007-001 6 october, 2010 rev. 01 s78dxxx 0 0.3 0.6 0.9 1.2 1.5 2.0 fig5. v out ? i out output current i out [a] [ current limit characteristics ] output voltage v out [v] 2.80 2.60 2.40 2.50 2.00 1.80 1.60 1.40 v out = 2.5v fig6. v out ? t j input ripple frequency [ khz ] ripple rejection rr [db] 80 70 60 50 40 30 20 10 0.1 1.0 10 100 f = 120hz / i o = 50ma -30 0 30 60 90 120 150 fig7. v drop ? t j junction temperature [ ] drop-out voltage v drop [mv] 700 600 500 400 300 200 100 0.00 v out = 2.5v i o = 1.0a i o = 0.5a
ksd-i0t007-001 7 october, 2010 rev. 01 s78dxxx fig.8 line transient response fig.9 line transient response fig.10 load transient response fig.11 load transient response output voltage deviation [v] 0.1 -0.1 0 load current [a] 1.0 0 0 120 80 160 40 200 time [s] output voltage deviation [mv] 20 -20 0 input voltage [v] 3.5 4.5 0 1.2 0.8 1.6 0.4 2.0 time [ms] cin=1.0uf, cout=47uf iout=10ma, t a =25 cin=1.0uf, cout=47uf, vin=vout+1v preload=200ma, t a =25 output voltage deviation [mv] 20 -20 0 input voltage [v] 3.5 5.5 cin=1.0uf, cout=47uf iout=10ma, t a =25 0 1.2 0.8 1.6 0.4 2.0 time [ms] output voltage deviation [v] 0.1 -0.1 0 load current [a] 1.0 0 0 120 80 160 40 200 time [s] cin=1.0uf, cout=47uf, vin=vout+3v preload=200ma, t a =25
ksd-i0t007-001 8 october, 2010 rev. 01 ? sot-223 outline dimension (unit : mm) recommend pcb solder land [unit: mm] s78dxxx
ksd-i0t007-001 9 october, 2010 rev. 01 ? to-252-3l outline dimension (unit : mm) 4.60 1.50 2 . 5 0 7 . 0 0 7.00 recommend pcb solder land [unit: mm] s78dxxx
ksd-i0t007-001 10 october, 2010 rev. 01 ? to-220f-3l outline dimension (unit : mm) s78dxxx
ksd-i0t007-001 11 october, 2010 rev. 01 the auk corp. products are intended for the use as components in general electronic equipment (office and co mmunication equipment, m easuring equipment, home appliance, etc.). please make sure that you consult with us before you use these auk corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to th e welfare of human life(atomi c energy control, airplane, spaceship, transportation, co mbustion control, all types of safety device, etc.). auk corp. cannot accept liability to any damage which may occur in case these auk corp. products were used in the mentioned equi pments without prior consultation with auk corp.. specifications mentioned in this publicati on are subject to change without notice. s78dxxx

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