parameter dc input voltage range dc output current range operating junction temperature ambient operating temperature symbol v in i o t jop t aop n features ? compact surface-mount package (sop-8) ? output current: 1 a ? low current consumption: iq(off) ( 1 m a (v c = 0 v) ? low dropout voltage: v dif 0.8 v (at i o = 1 a) v dif 1.2 v (i o = 1 a) for SI-3018LSA ? 4 types of output voltages (1.8 v, 2.5 v, 3.3 v, 5.0 v) available ? output on/off control compatible with ls-ttl ? built-in foldback overcurrent, thermal protection circuits n applications ? auxiliary power supply for pc ? battery-driven electronic equipme n absolute maximum ratings si-3000lsa series surface-mount, low current consumption, low dropout voltage dropper type unit v a w w c c c c/w c/w ratings 16 1 1.16 1.1 C30 to +150 C30 to +150 C30 to +150 36 100 symbol v in i o p d1 *1 p d2 *2 t j *3 t op t stg q j-i q j-a *2 parameter dc input voltage dc output current power dissipation junction temperature ambient operating temperature storage temperature thermal resistance (junction to lead (pin 8)) thermal resistance (junction to ambient air) (t a =25 c) n recommended operating conditions *1: v in (max) and i o (max) are restricted by the relationship p d = (v in C v o ) i o . calculate these values referring to the reference data. *2: refer to the dropout voltage section. ratings SI-3018LSA si-3025lsa si-3033lsa si-3050lsa 3.1 to 3.5 *1 *2 to 3.5 *1 *2 to 5.2 *1 *2 to 8.0 0 to 1 C20 to +125 C30 to +85 unit v a c c l si-3000lsa series *1: when mounted on glass-epoxy board 56.5 56.5 mm (copper laminate area 100%) *2: when mounted on glass-epoxy board 40 40 mm (copper laminate area 100%). *3: thermal protection circuits may operate if the junction temperature exceeds 135 c
*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-3033lsa), and i o = 0.5 a. *2: output is off when the output control terminal v c is open. each input level is equivalent to that for ls-ttl. therefore, it is possible to be driven directly by an ls-ttl circuit. the si-3000lsa series employs a foldback-type overcurrent protection circuit. *3: in applications in which a certain current is required for start-up, this circuit may cause a start-up error, and therefore the si-3000lsa series is not recommended for use in such applications. (1) constant current load (2) dual polarity power supply (3) series power supply (4) v o adjustment by raising ground voltage n external dimensions (unit : mm) n electrical characteristics (t a =25 c, v c =2v unless otherwise specified) unit v v mv mv mv/ c db ma m a a v m a m a v symbol v o conditions v dif conditions conditions d v line conditions d v oload 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 conditions 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 0~10 0.5 0.1 ?.05 0.12 m pin arrangement q v in w nc (leave open) e v in r v c t gnd y gnd u v o i v o plastic mold package type flammability: ul94v-0 weight: approx. 0.1g l si-3000lsa series ratings SI-3018LSA si-3025lsa si-3033lsa si-3050lsa 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 4.90 5.00 5.10 v in =3.3v, i o =0.5a v in =3.3v, i o =0.5a v in =5v, i o =0.5a v in =6.5v, i o =0.5a C 0.4 0.4 0.4 Ci o 0.5a i o 0.5a i o 0.5a 0.6 1.2 0.8 0.8 0.8 i o 1a 210 210 310 15 v in =3.1 to 3.5v, i o =0.3a v in =3.1 to 3.5v, i o =0.3a v in =4.5 to 5.5v, i o =0.3a v in =6 to 7v, i o =0.3a 10 20 10 20 10 20 30 v in =3.3v, i o =0 to 1a v in =3.3v, i o =0 to 1a v in =5v, i o =0 to 1a v in =6.5v, i o =0 to 1a 0.3 0.3 0.3 0.5 v in =3.3v, i o =5ma, t j =0 to 100 cv in =3.3v, i o =5ma, t j =0 to 100 cv in =5v, i o =5ma, t j =0 to 100 cv in =6.5v, i o =5ma, t j =0 to 100 c 60 57 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 =6.5v, f=100 to 120h z 1.7 2.5 1.7 2.5 1.7 2.5 1.7 2.5 v in =3.3v, i o =0a v in =3.3v, i o =0a v in =5v, i o =0a v in =6.5v, i o =0a 1111 v in =3.3v, i o =0a, v c =0v v in =3.3v, i o =0a, v c =0v v in =5v, i o =0a, v c =0v v in =6.5v, i o =0a, v c =0v 1.2 1.2 1.2 1.2 v in =3.3v v in =3.3v v in =5v v in =6v 2.0 2.0 2.0 2.0 0.8 0.8 0.8 0.8 40 80 40 80 40 80 40 80 v c =2v 0C50C50C50C5 v c =0v 0.5 0.5 0.5 0.5 v in =3.3v, i o =0a v in =3.3v, i o =0a v in =5v, i o =0a v in =6.5v, i o =0a 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 *1,3 control voltage (output on) *2 control voltage (output off) *2 v c control current (output on) pin control current (output off) output off voltage
n block diagram n standard external circuit n reference data c o : output capacitor (22 m f or larger) 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. tantalum capacitors are recommended for c 1 and c 0 , particularly at low temperatures. * leave pin 2 open. tsd + v in nc v in v c v o v o gnd gnd 1 2 3 4 8 7 6 5 1 2 3 4 8 7 6 5 + v in v in v c v o c in c o gnd + load pwb copper laminate area vs. junction to ambient air thermal resistance allowable output current (vs. v in -v out voltage difference) v in -i o max l si-3000lsa series 150 140 130 120 110 100 90 80 70 100 1000 5000 copper laminate area (mm 2 ) pwb (glass-epoxy, 40 40mm) 160mm (40 40) mm j-a ( c/w) 1.2 1.0 0.8 0.6 0.4 0.2 0 1234 v in -v out voltage difference (v) t j = 120 c (20% derating of 150 c) i out ( max) (a) t a =25 c t a =85 c j-a =100 c/w the inner frame stage, on which the ptr is mounted, is directly connected to the v out pin. therefore, enlarging the copper laminate area achieves a heat radiation effect of the v out pin. q q
n typical characteristics of SI-3018LSA (t a =25 c) i o vs. v dif characteristics load regulation output on/off control output voltage characteristics overcurrent protection characteristics output on/off control current line regulation thermal protection characteristics circuit current [note on thermal protection] the thermal protection circuit is in- tended for protection against heat during instantaneous short-circuiting. its operation is not guaranteed for continuous heating conditions such as short-circuiting over extended periods of time. 0 0.2 0.4 0.6 0.8 1.0 1.0 0.8 0.6 0.4 0.2 0 output current i o (a) dropout voltage v dif (v) v in =8v 5v 3.2v 0 0.2 0.4 0.6 0.8 1.0 1.84 1.82 1.80 1.78 1.76 1.74 1.72 output current i o (a) output voltage v o (v) v in =3.3v i o =5ma 0123 3 2 1 0 output on/off control voltage v c (v) output voltage v o (v) i o =0a-1a 0.25a step 0123 4 5 3 2 1 0 input voltage v in (v) output voltage v o (v) v in =5v v in =6v v in =3.2v 2 1.5 1 0.5 0 0 0.5 1 1.5 2 output current i o (a) output voltage v o (v) v in =3.3v i o =5ma 0123 60 50 40 30 20 10 0 output control voltage v c (v) terminal control current l c ( a) m 0246810 1.84 1.82 1.80 1.78 1.76 1.74 1.72 input voltage v in (v) output voltage v o (v) i o =1a 0.75a 0.5a 0.25a 0a i o =1a-0a 0.25a step 0246810 20 15 10 5 0 input voltage v in (v) ground current i g (ma) l si-3000lsa series v in =3.3v i o =5ma 3 2 1 0 0 60 100 140 180 20 case temperature t c ( c) output voltage v o (v)
n typical characteristics of si-3025lsa (t a =25 c) i o vs. v dif characteristics load regulation output on/off control output voltage characteristics overcurrent protection characteristics output on/off control current line regulation thermal protection characteristics circuit current [note on thermal protection] the thermal protection circuit is in- tended for protection against heat dur- ing instantaneous short-circuiting. its operation is not guaranteed for con- tinuous heating conditions such as short-circuiting over extended periods of time. 0 0.2 0.4 0.6 0.8 1.0 1.0 0.8 0.6 0.4 0.2 0 output current i o (a) dropout voltage v dif (v) v in =10v 8v 5v 3.2v 0 0.2 0.4 0.6 0.8 1.0 2.58 2.56 2.54 2.52 2.50 2.48 2.46 output current i o (a) output voltage v o (v) v in =3.3v i o =5ma 012 3 3 2 1 0 output on/off control voltage v c (v) output voltage v o (v) i o =0a-1a 0.25a step 0123 4 5 3 2 1 0 input voltage v in (v) output voltage v o (v) v in =3.2v 5v 6v 3 2 1 0 0 0.5 1 1.5 2 output current i o (a) output voltage v o (v) v in =3.3v i o =5ma 0123 60 50 40 30 20 10 0 output control voltage v c (v) terminal control current l c ( a) m i o =1a 0.75a 0.5a 0.25a 0a 02468 12 10 2.58 2.56 2.54 2.52 2.50 2.48 2.46 input voltage v in (v) output voltage v o (v) v in =3.3v i o =5ma 3 2 1 0 0 60 100 140 180 20 case temperature t c ( c) output voltage v o (v) i o =1a-0a 0.25a step 0246810 20 15 10 5 0 input voltage v in (v) ground current i g (ma) l si-3000lsa series
n typical characteristics of si-3033lsa (t a =25 c) i o vs. v dif characteristics load regulation output on/off control output voltage characteristics overcurrent protection characteristics output on/off control current line regulation thermal protection characteristics circuit current [note on thermal protection] the thermal protection circuit is in- tended for protection against heat during instantaneous short-circuiting. its operation is not guaranteed for continuous heating conditions such as short-circuiting over extended pe- riods of time. 0 0.2 0.4 0.6 0.8 1.0 1.0 0.8 0.6 0.4 0.2 0 output current i o (a) dropout voltage v dif (v) v in =6v 5v 4.3v 0 0.2 0.4 0.6 0.8 1.0 3.34 3.32 3.30 3.28 3.26 3.24 3.22 output current i o (a) output voltage v o (v) v in =5v i o =5ma 0123 4 3 2 1 0 output on/off control voltage v c (v) output voltage v o (v) i o =0a-1a 0.25a step 01234 6 5 4 3 2 1 0 input voltage v in (v) output voltage v o (v) v in =4.3v 5v 6v 4 3 2 1 0 0 0.5 1 1.5 2 output current i o (a) output voltage v o (v) v in =5v i o =5ma 0123 60 50 40 30 20 10 0 output control voltage v c (v) terminal control current l c ( a) m i o =1a 0.75a 0.5a 0.25a 0a 02468 12 10 3.34 3.32 3.30 3.28 3.26 3.24 3.22 input voltage v in (v) output voltage v o (v) v in =5v i o =5ma 4 3 2 1 0 0 60 100 140 180 20 case temperature t c ( c) output voltage v o (v) i o =1a-0a 0.25a step 0246810 20 15 10 5 0 input voltage v in (v) ground current l g (ma) l si-3000lsa series
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