parameter input voltage dc output current ambient operating temperature symbol v in i o t op n features ? compact surface-mount package (sot-89-5) ? output current: 250 ma ? low current consumption lq (off) 1 m a (v c = 0 v) ? low dropout voltage: v dif 0.5 v (at i o = 250 ma) ? 5 types of output voltages (adj, 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-3000lu series surface-mount, low current consumption, low dropout voltage dropper type l si-3000lu series ratings min. max. *2, *3 v o +2 *1 0 250 C20 85 unit v ma c 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. *3: for the si-3012lu, set the input voltage to at least 2.4 v, and secure the minimum voltage as explained in setting dc input voltage, dropper type application note.
l si-3000lu series 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-3033LU, 6 v for si-3050lu), and i o = 10 ma. *2: output is off when the output control pin (v c pin) is open. each input level is equivalent to that for ls-ttl. therefore, the device can be driven directly by an ls-ttl circuit. (t a =25 c, v c =2v unless otherwise specified) unit v v mv mv mv/ c db m a m a ma v m a m a v 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 q (off) conditions i s1 conditions v c , ih v c , il i c , ih conditions i c , il conditions v o n external dimensions pin arrangement q a dj w gnd e v c r v in t v o plastic mold package type flammability: ul94v-0 weight: approx. 0.05g (unit : mm) 4.5 0.05 0.1 0.05 0.4 0.03 1.6 0.05 4.2 0.05 4.2 0.05 4.2 0.05 4.2 0.05 4.2 0.05 4.7 0.05 4.3 0.05 2.5 0.05 0.90 0.1 0.90 0.1 0.40 1.5 0.05 1.5 0.05 1.5 0.05 0.4 0.05 ( 1.0 0.05 ) f tr qwe parameter output voltage dropout voltage line regulation load regulation temperature coeffi- cient of output voltage ripple rejection quiescent circuit current off circuit current overcurrent protection starting current *1 control voltage (output on) *2 control voltage (output off) *2 v c control current (output on) pin control current (output off) output off voltage (under development) (under development) (under development) ratings si-3012lu si-3018lu si-3025lu SI-3033LU si-3050lu min. typ. max. min. typ. max. min. typ. max. min. typ. max. min. typ. max. 1.210 1.250 1.290 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 =v o +1v, i o =10ma 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 0.5 0.3 0.3 0.3 i o =100ma(v o =3.3v) i o =100ma 0.5 0.5 0.5 0.5 0.5 i o =250ma(v o =3.3v) i o =250ma 10 10 10 10 15 v in =v o +1 to v o +5v, v in =2.5 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 i o =10ma( v o =3.3v) 20 20 40 40 40 v in =v o +1v, v in =3.3v, i o =1 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 i o =1 to 250ma( v o =3.3v) 0.3 0.2 0.25 0.3 0.3 t j =0 to 100 c 55 55 55 55 55 v in =v o +1v, 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 f=100 to 120h z ( v o =3.3v) 150 150 150 150 150 v in =v o +1v, i o =0ma 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, v c =2v, r2=100k w v c =2v v c =2v v c =2v v c =2v 11111 v in =v o +1v, v c =0v v in =3.3v, v c =0v v in =3.3v, v c =0v v in =5v, v c =0v v in =6v, v c =0v 260 260 260 260 260 v in =v o +1v v in =3.3v v in =3.3v v in =5v v in =6v 2.0 2.0 2.0 2.0 2.0 0.8 0.8 0.8 0.8 0.8 40 40 40 40 40 v c =2v 0C5 0C5 0C5 0C5 0C5 v c =0v 0.5 0.5 0.5 0.5 0.5
l si-3000lu series n block diagram n standard external circuit n reference data c o : output capacitor (10 m f or larger) the si-3000lu 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. ? settings for si-3012lu output voltage (recommended voltage: 1.5 v to 15 v) r1 and r2: resistors for output setting the output voltage can be set by connecting r1 and r2 as shown in the diagram on the left. r2: 100 k w is recommended r1=(v o Cv adj )/(v adj /r2) ? a monolithic ic is mounted. the inner frame stage is connected to the gnd pin (pin 2). therefore, enlarging the copper lami- nate 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) si-3012lu si-3018lu, si-3025lu, SI-3033LU, si-3050lu ref tsd + v in v c v o gnd 4 3 5 2 a dj 1 ref tsd + v in v o gnd 4 3 5 2 a dj 1 4 3 2 5 1 + v o v dj v c v in c in c o gnd + load 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 si-3018lu, si-3025lu, SI-3033LU, si-3050lu si-3012lu 4 3 2 5 1 + v in v in v c v o c in c o r 1 r 2 gnd + load
l si-3000lu series n typical characteristics of SI-3033LU (t a =25 c) i o vs. v dif characteristics output voltage characteristics line regulation load regulation output on/off control 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) 0246810 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 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) v in =3.8v 0 0.5 1.0 1.5 2.0 2.5 3.0 5 4 3 2 1 0 output control voltage v c (v) output voltage v o (v) v in =5v 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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