parameter input voltage dc output current ambient operating temperature symbol v in i o t op n features ? compact surface-mount package (sot-89-3) ? output current: 250 ma ? low dropout voltage: v dif 0.5 v (at i o = 250 ma) ? 4 types of output voltages (1.8 v, 2.5 v, 3.3 v, 5.0 v) available ? built-in dropping type overcurrent, thermal protection circuits n applications ? auxiliary power supply for pc ? battery-driven electronic equipment n absolute maximum ratings si-3000lus series l si-3000lus series ratings min. max. *2 v o +2 *1 0 250 C20 85 unit v ma w c c c/w ratings 18 250 0.75 C40 to +135 C40 to +125 146 symbol v in i o p d *1 t j *2 t op *2 q j-a *1 parameter dc input voltage dc output current power dissipation junction temperature storage temperature thermal resistance (junction to ambient air) (t a =25 c) *1: when mounted on glass-epoxy board 40 40 mm (copper laminate area 2%) *2: thermal protection circuits may operate if the junction temperature exceeds 135 c n recommended operating conditions *1: v in (max) and i o (max) are restricted by the relationship p d = (v in - v o ) i o . calculate these values referring to the reference data. *2: refer to the dropout voltage section. unit v ma c surface-mount, low current consumption, low dropout voltage dropper type
parameter output voltage dropout voltage line regulation load regulation temperature coeffi- cient of output voltage ripple rejection quiescent circuit current overcurrent protection starting current *1 symbol v o conditions v dif conditions conditions d v line conditions d v load conditions d v o / d t a conditions r rej conditions i q conditions i s1 conditions n electrical characteristics *1: is 1 is specified as the 5% drop point of output voltage v o on the condition that v in =3.3 v (5 v for si-3033lus, 6 v for si-3050lus), and i o =10 ma. n external dimensions pin arrangement q v in w gnd e v out plastic mold package type flammability: ul94v-0 weight: approx. 0.05g l si-3000lus series (unit : mm) (t a =25 c, v c =2v unless otherwise specified) unit v v mv mv mv/ c db m a ma ratings SI-3018LUS si-3025lus si-3033lus si-3050lus min. typ. max. min. typ. max. min. typ. max. min. typ. max. 1.764 1.800 1.836 2.450 2.500 2.550 3.234 3.300 3.366 4.900 5.000 5.100 v in =3.3v, i o =10ma v in =3.3v, i o =10ma v in =5v, i o =10ma v in =6v, i o =10ma 0.3 0.3 0.3 0.3 i o =100ma 0.5 0.5 0.5 0.5 i o =250ma 10 10 10 10 v in =3.3 to 5v, i o =10ma v in =3.3 to 5v, i o =10ma v in =4.5 to 8v, i o =10ma v in =6 to 10v, i o =10ma 40 40 40 40 v in =3.3v, i o =0 to 250ma v in =3.3v, i o =0 to 250ma v in =5v, i o =0 to 250ma v in =6v, i o =0 to 250ma 0.25 0.25 0.3 0.3 t j =0 to 100 c 55 55 55 55 v in =3.3v, f=100 to 120h z v in =3.3v, f=100 to 120h z v in =5v, f=100 to 120h z v in =6v, f=100 to 120h z 250 250 250 250 v in =3.3v, i o =0ma v in =3.3v, i o =0ma v in =5v, i o =0ma v in =6v, i o =0ma 260 260 260 260 v in =3.3v v in =3.3v v in =5v v in =6v 4.5 0.49max. 0.49max. 0.54 max. 1.5 1.5 0.16 (1.7) 0.4 1.6 123 (r0.3) (r0.15) 2.5 (0.4) 4.25max. 1.5 (0.1) 0.25 0.8min. 45 (5 ) (8 ) (8 ) (5 ) ( 1.0) f (under development) (under development) (under development)
l si-3000lus series n block diagram n standard external circuit n reference data c o : output capacitor (10 m f or larger) the si-3000lus series can be operated on the circuit even if a low esr ceramic capacitor is used as the output capacitor. c in :input capacitor (0.1 to 10 m f) this capacitor is required in the case of an inductive input line or long wiring. ? a monolithic ic is mounted. the inner frame stage is con- nected to the gnd pin (pin 2). therefore, enlarging the copper laminate area leading to the gnd pin achieves a heat radiation effect. ? how to calculate the junction temperature measure the temperature (t c ) of the gnd pin (pin 2) lead section using a thermistor, etc. substitute this value in the following formula and calculate the junction temperature. t j =p d q jCc+tc ( q jCc=5 c/w) ref tsd + v in v o gnd 13 2 13 2 + v in v in v o c in load c o gnd + 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 10 100 1000 copper laminate area (mm 2 ) power dissipation p d (w) ta=25 c ta=40 c ta=60 c ta=85 c copper laminate area vs. power dissipation t j =100 c pwb size 40 40
l si-3000lus series n typical characteristics of si-3033lus (t a =25 c) i o vs. v dif characteristics output voltage characteristics line regulation load regulation overcurrent protection characteristics 0 50 100 150 200 250 300 0.6 0.5 0.4 0.3 0.2 0.1 output current i o (ma) dropout voltage v dif (v) 0 246810 5 4 3 2 1 input voltage v in (v) output voltage v o (v) l o =0ma l o =250ma 046810 3.34 3.32 3.30 3.28 3.26 3.24 3.22 input voltage v in (v) output voltage v o (v) l o =0ma l o =250ma 8v 6v 5v v in = 3.8v 0 50 100 150 200 250 300 3.34 3.32 3.30 3.28 3.26 3.24 3.22 output current i o (ma) dropout voltage v dif (v) 5 4 3 2 1 0 0 100 200 300 400 output current i o (ma) output voltage v o (v) v in =3.8v 5v 8, 10v
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