70 ics 1-1-4 linear regulator ics absolute maximum ratings unit v v a w c c c/w c/w ratings 17 v in 1.0 0.76 ?0 to +125 ?0 to +125 130 22 symbol v in *1 v c i o *1 p d *1, *2 t j t stg j-a j-l parameter dc input voltage output control terminal voltage dc output current power dissipation junction temperature storage temperature thermal resistance (junction to ambient air) thermal resistance (junction to lead (pin 7)) *1: v in (max) and i o (max) are restricted by the relation pd = (v in - v o ) i o . please calculate these values referring to the copper laminate area vs. power dissipation data as shown hereinafter. *2: when mounted on a glass epoxy board of 1600 mm 2 (copper laminate area 2%). (t a =25 c) features compact surface-mount package (sop8) output current: 1.0 a compatible with low esr capacitor low circuit current at output off iq 350 a (i o = 0 a, v c = 2 v) low current consumption iq (off) 1 a (v c = 0 v) low dropout voltage v dif 0.6 v (i o = 1 a) ? types of output voltages (2.5 v, 3.3 v, and variable type) available output on/off control terminal voltage compatible with ls-ttl built-in drooping-type-overcurrent and thermal protection circuits applications local power supplies battery-driven electronic equipment electrical characteristics (t a =25 c, v c =2 v, unless otherwise specified) *1: refer to the dropout voltage parameter. *2: the i s1 is specified at the 5% drop point of output voltage v o on the condition that v in = v o + 1 v, and i o = 10 ma. *3: output is off when the output control terminal v c is open. each input level is equivalent to ls-ttl level. therefore, the device can be driven directly by ls-ttls. surface-mount, low current consumption, low dropout voltage si-3000ks series unit v v v mv mv a a mv/ c db a v a a pa r ameter input voltage output voltage (reference voltage v adj for si-3012ks) dropout voltage line regulation load regulation quiescent circuit current circuit current at output off t emperature coefficient of output voltage ripple rejection overcurrent protection starting current *2 control voltage (output on) *3 control voltage (output off) v c control current (output on) te rm inal control current (output off) symbol v in v o (v adj ) conditions v dif conditions conditions ? v oline conditions ? v oload conditions i q conditions i q (off) conditions ? v o / ? t a conditions r rej conditions i s1 conditions v c , ih v c , il i c , ih conditions i c , il conditions ratings si-3012ks (variable type) si-3025ks si-3033ks min. typ. max. min. typ. max. min. typ. max. 2.4 *1 *1 1.24 1.28 1.32 2.45 2.50 2.55 3.234 3.300 3.366 0.3 0.4 0.4 0.6 0.6 0.6 10 10 15 40 40 50 350 350 350 111 0.3 0.3 0.3 55 55 55 1.2 1.2 1.2 2.0 2.0 2.0 0.8 0.8 0.8 40 40 40 ? 0 5 0 ? 0 v in =3.3v, i o =10ma i o =0.5a i o =1a v in =3.3 to 8v, i o =10ma v in =3.3v, i o =0 to 1a v in =3.3v, i o =0a, v c =2v v in =3.3v, v c =0v t j =0 to 100 c v in =3.3v, f=100 to 120h z v in =3.3v, i o =10ma i o =1a (v o =2.5v) v in =3.3 to 8v, i o =10ma (v o =2.5v) v in =3.3v, i o =0a, v c =2v, r2=24k ? v in =3.3v, i o =0 to 1a (v o =2.5v) v in =3.3v, f=100 to 120h z (v o =2.5v) t j =0 to 100 c (v o =2.5v) v in =3.3v, v c =0v v in =3.3v (v o =2.5v) i o =0.5a (v o =2.5v) v c =0v v c =2v v in =3.3v v in =5v, i o =10ma i o =0.5a i o =1a v in =5 to 10v, i o =10ma v in =5v, i o =0 to 1a v in =5v, i o =0a, v c =2v v in =5v, v c =0v t j =0 to 100 c v in =5v, f=100 to 120h z v in =5v
71 ics si-3000ks series external dimensions (sop8) (unit : mm) 0.995max. 0.10 1.27 0.4 0.1 0.4 0.1 0.15 +0.1 5.1 0.4 1.27 8765 1234 4.4 0.2 1.5 0.1 1.55 0.15 0.05 0.05 6.2 0.3 0 to 10 0.5 0.1 ?.05 0.12 m pin assignment q v c w v in e v o r sence (adj for si-3012ks) t gnd y gnd u gnd i gnd plastic mold package type flammability: ul 94v-0 product mass: approx. 0.1 g block diagram t ypical connection diagram si-3012ks si-3025ks, si-3033ks si-3012ks si-3025ks, si-3033ks r 1 , r 2 : output voltage setting resistors the output voltage can be set by connecting r 1 and r 2 as shown above. the recommended value of r 2 is 24 k ? . r1=(v o ? adj ) (v adj /r2) 2 v in 1 ref v c v o adj gnd 4 8 7 6 5 3 tsd - + 2 v in 1 ref v c v o sense gnd 4 8 7 6 5 3 tsd - + gnd 5 to 8 v in c in r1 r2 2 v o c o 3 v c 1 adj 4 load gnd 5 to 8 v in c in r2 2 v o c o 3 v c 1 sense 4 load c in :i nput capacitor (22 f or larger) c o : output capacitor (22 f or larger) for si-3000ks series, co has to be a low esr capacitor. when using the electrolytic capacitor, the si-3000ks series may oscillate at a low temperature. reference data copper laminate area vs. thermal resistance copper laminate area vs. power dissipation obtaining the junction temperature measure the temperature t l at the lead part of the gnd pin (pin 7) with a thermocouple, etc. then, substitute this value in the following formula to obtain the junction temperature. t j =p d j? + t l ( j? = 22 c/w) thermal resistance j-a ( c/w) copper laminate area (mm 2 ) (gnd terminal) 10 100 140 120 100 80 60 40 1000 area of pc board : 40 40mm po w er dissipation p d (w) 10 100 1.2 1 0.8 0.6 0.4 0.2 0 1000 tj=100 c area of pc board : 40 40mm t a=25 c t a=50 c t a=80 c copper laminate area (mm 2 ) (gnd terminal)
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