29 features ? compact full-mold package (equivalent to to220) ? output current: 1.0a ? low dropout voltage: v dif 1v (at i o =1.0a) ? variable output voltage (rise only) may be used for remote sensing (excluding si-3025f) ? output on/off control terminal is compatible with ls-ttl. (it may be directly driven by ls-ttl or standard cmos logic.) ? built-in foldback overcurrent, overvoltage, thermal protection circuits ? variable output voltage type (si-3025f) also available applications ? for stabilization of the secondary stage of switching power supplies ? electronic equipment absolute maximum ratings (t a =25 c) si-3000f series 5-terminal, multi-function, full-mold, low dropout voltage dropper type symbol v in v c i o p d1 p d2 t j t op t stg r th(j-c) r th(j-a) ratings SI-3050F si-3090f/3120f si-3150f/3157f si-3240f si-3025f 25 30 35 45 30 v in 1.0 *2 14**(with infinite heatsink) 1.5(without heatsink, stand-alone operation) C 40 to +125 C 30 to +100 C 40 to +125 7.0*** 66.7(without heatsink, stand-alone operation) parameter dc input voltage voltage of output control terminal dc output current power dissipation junction temperature ambient operating temperature storage temperature thermal resistance (junction to case) thermal resistance (junction to ambient air) si-3000f series unit v v a w w c c c c/w c/w ** si-3240f: 18 *** si-3240f: 5.5
30 *1: "a" may be indicated to the right of the sanken logo. *2: v in(max) and i o(max) are restricted by the relation p d(max) =(v in -v o ) ? i o =14w(si-3240f: 18w). *3: refer to the dropout voltage.(refer to setting dc input voltage on page 7.) *4: i s 1 is specified at C 5(%) drop point of output voltage v o on the condition that v in =v o +3v, i o =0.5a. *5: output is on even when output control terminal vc is open. each input level is equivalent to ls-ttl. therefore, it may be di rectly driven by an ls-ttl circuit. *6: when setting output voltage to 5v or less, input voltage needs to be set to 6v or over to operate stably. *7: a foldback type overcurrent protection circuit is built into the ic regulator. therefore, avoid using it for the following applications as it may cause starting errors: (1) constant current load (2) plus/minus power (3) series power (4) v o adjustment by raising ground voltage si-3000f series parameter input voltage output voltage dropout voltage line regulation load regulation temperature coefficient of output voltage ripple rejection quiescent circuit current overcurrent protection starting current *4,7 control voltage (output on) control voltage (output off) control current (output on) control current (output off) electrical characteristics (except si-3025f) si-3000f *1 si-3000fa unit v v v mv mv mv/ c db ma a v a ma symbol v in v o conditions v dif conditions conditions ? v oline conditions ? v oload conditions ? v o / ? t a conditions r rej conditions i q conditions i s1 conditions v c. ih v c. il i c. ih conditions i c. il conditions (t a =25 c unless otherwise specified) v c terminal *5 ratings SI-3050F si-3090f si-3120f si-3150f si-3157f si-3240f min. typ. max. min. typ. max. min. typ. max. min. typ. max. min. typ. max. min. typ. max. 6 *3 15 *2 10 *3 20 *2 13 *3 25 *2 16 *3 27 *2 16.7 *3 27 *2 25 *3 40 *2 4.80 5.00 5.20 8.64 9.00 9.36 11.52 12.00 12.48 14.40 15.00 15.60 14.92 15.70 16.48 23.04 24.00 24.96 4.90 5.00 5.10 8.82 9.00 9.18 11.76 12.00 12.24 14.70 15.00 15.30 v in =8v, i o =0.5a v in =12v, i o =0.5a v in =15v, i o =0.5a v in =18v, i o =0.5a v in =19v, i o =0.5a v in =27v, i o =0.5a 0.5 0.5 0.5 0.5 0.5 0.5 i o 0.5a 1.0 1.0 1.0 1.0 1.0 1.0 i o 1.0a 10 30 18 48 24 64 30 90 30 90 48 128 v in =6v to 15v, i o =0.5a v in =10v to 20v, i o =0.5a v in =13v to 25v, i o =0.5a v in =16v to 27v, i o =0.5a v in =17v to 27v, i o =0.5a v in =25v to 38v, i o =0.5a 40 100 70 180 93 240 120 300 120 300 120 300 v in =8v, i o =0 to 1.0a v in =12v, i o =0 to 1.0a v in =15v, i o =0 to 1.0a v in =18v, i o =0 to 1.0a v in =19v, i o =0 to 1.0a v in =27v, i o =0 to 1.0a 0.5 1.0 1.5 1.5 1.5 2.5 v in =8v, i o =5ma, tj=0 to 100 cv in =12v, i o =5ma, tj=0 to 100 cv in =15v, i o =5ma, tj=0 to 100 cv in =18v, i o =5ma, tj=0 to 100 cv in =19v, i o =5ma, tj=0 to 100 cv in =27v, i o =5ma, tj=0 to 100 c 54 54 54 54 54 54 v in =8v, f=100 to 120h z v in =12v, f=100 to 120h z v in =15v, f=100 to 120h z v in =18v, f=100 to 120h z v in =19v, f=100 to 120h z v in =27v, f=100 to 120h z 310 310 310 310 310 510 v in =8v, i o =0a v in =12v, i o =0a v in =15v, i o =0a v in =18v, i o =0a v in =19v, i o =0a v in =27v, i o =0a 1.2 1.2 1.2 1.2 1.2 1.2 v in =8v v in =12v v in =15v v in =18v v in =19v v in =27v 2.0 2.0 2.0 2.0 2.0 2.0 0.8 0.8 0.8 0.8 0.8 0.8 20 20 20 20 20 20 v c =2.7v C 0.3 C 0.3 C 0.3 C 0.3 C 0.3 C 0.3 v c =0.4v
31 (t a =25 c unless otherwise specified) parameter input voltage output voltage reference voltage dropout voltage line regulation load regulation temperature coefficient of reference voltage ripple rejection quiescent circuit current overcurrent protection starting current *4,7 control voltage (output on) control voltage (output off) control current (output on) control current (output off) external dimensions electrical characteristics (si-3025f) forming no. 1101 (unit:mm) si-3000f series unit v v v v mv/v mv/v mv/ c db ma a v a ma symbol v in v o v ref v dif conditions conditions ? v oline conditions ? v oload conditions ? v ref / ? t a conditions r rej conditions i q conditions i s1 conditions v c. ih v c. il i c. ih conditions i c. il conditions v c terminal *5 ratings si-3025f min. typ. max. 6 *6 25 *2 324 2.45 2.55 2.65 0.5 i o 0.5a 1.0 i o 1.0a 10 v in =v o +1 to 25v, i o =0.5a 20 v in =v o +3v, i o =0 to 1.0a 0.5 v in =v o +3v, i o =5ma, t j =0 to 100 c 54 v in =v o +3v, f=100 to 120h z 310 v in =v o +3v, i o =0a 1.2 v in =v o +3v 2.0 0.8 20 v c =2.7v C 0.3 v c =0.4v 10.0 0.2 4.2 0.2 0.95 0.15 8.2 0.7 2.6 0.1 3.9 0.7 (4.3) (4.6) (8.0) (17.9) (2.0) 0.85 +0.2 C 0.1 0.45 +0.2 C 0.1 3.2 0.2 4.0 0.2 7.9 0.2 5.0 0.6 16.9 0.3 0.5 12345 p1.7 0.7 4=6.8 0.7 2.8 0.2 a b a. part number b. lot number pin arrangement (only si-3025f) q gnd q gnd w v c w v c e v o e v o r v os r v ref t v in t v in plastic mold package type flammability: ul94v-0 weight: approx. 2.3g
32 c 0 : output capacitor (47 to 100 f) *1 c 1 : oscillation prevention capacitor c 2 (c 1 : approx. 47 f, c 2 : 0.33 f) these capacitors are required if the input line is inductive and in the case of long wiring. tantalum capacitors are rec- ommended for c 1 and c 0 , particularly at low temperatures. *2 d 1 : protection diode this diode is required for protection against reverse bias- ing of the input and output. sanken eu2z is recommended. *3 r 1 : external resistor for setting output voltage r 2 relationship between output voltage v o and external re- sistors r 1 and r 2 is as follows. v o =v ref ? 1+ r 1 (v ref =2.55v(typ.)) r 2 r 2 must be 2.55k ? for stable operation. block diagram si-3000f si-3025f t a -p d characteristics standard external circuit si-3025f si-3000f p d =i o ? [v in (mean) C v o ] 1 2 5 reg. on/off protection drive amp. v ref 3 4 mic t r1 equivalent to ls-ttl 1 2 5 reg. on/off protection drive amp. v ref 3 4 mic t r1 equivalent to ls-ttl d 1 c 0 c 2 c 1 5 si-3000f open 2 3 4 1 * 1 * 2 ++ dc input dc output v in v o gnd gnd d 1 c 0 r 1 r 2 c 2 c 1 dc input dc output v in v o gnd gnd 5 open 2 3 4 1 si-3025f * 1 * 3 * 3 * 2 ++ si-3000f series 15 10 5 0 C 30 02550 ambient temperature t a ( c) power dissipation p d (w) 75 100 200 200 2mm (2.3 c/w) 100 100 2mm (5.2 c/w) 75 75 2mm (7.6 c/w) infinite heatsink without heatsink with silicon grease heatsink: aluminum (except si-3240f) 15 20 10 5 0 C 30 0 25 50 ambient temperature t a ( c) power dissipation p d (w) 75 100 infinite heatsink without heatsink 75 75 2mm (7.6 c/w) 100 100 2mm (5.2 c/w) 200 200 2mm (2.3 c/w) with silicon grease heatsink: aluminum (si-3240f) p d =i o ? [v in (mean) C v o ]
33 1. variable output voltage with a single external resistor the output voltage may be increased by inserting resistor r ex between terminals no.4 (sensing terminal) and no.3 (output terminal). the cur- rent i rex flowing into terminal no.4 is 1ma (typ.), therefore the adjusted output voltage v out is: v o =v 04 +i rex ? r ex *v 04 : output voltage of si-3000f series however, the internal resistor (between terminals no. 4 and no.1) is a semiconductor resistor, which has approximately thermal characteris- tics of +0.2%/ c. it is important to keep the thermal characteristics in mind when adjust- ing the output voltage. 2. variable output voltage with two external resistors the output voltage may be increased by inserting resistors r ex1 be- tween terminals no.4 (sensing terminal) and no.3 (output terminal) and r ex2 between terminals no.4 and no.1 (ground terminal). the current i 4in flowing into terminal no.4 is 1ma (typ.) so the thermal characteristics may be improved compared to the method shown in 1 by setting the external current i rex1 at approximately 5 times the value of i 4in (stability coefficient s=5). the adjusted output voltage v out in this case is: v o =v 04 +r ex1 ? i rex1 i rex1 =s ? i 4in the value of the external resistors may be obtained as follows: r ex1 = v o -v 04 r ex2 = v 04 s ? i 4in , (s-1) ? i 4in *v 04 : output voltage of si-3000f series s: stability coefficient of i 4in (may be set to any value) note: in the si-3000f series, the output voltage increase can be ad- justed as mentioned above. however, when the rise is set to ap- proximately 10v compared to output voltage v 04 , the necessary output current may not be obtained due to the s.o.a. protection circuit in the si-3000f series. gnd gnd open 5 2 3 4 1 si-3000f i rex r ex 47 f47 f v o v 04 v in ++ gnd gnd open 5 2 3 4 1 si-3000f i rex1 r ex1 r ex2 47 f47 f v o i 4in v 04 v in ++ 35 20 25 30 15 10 5 0 246810 output voltage v o (v) external resistor r ex (k ? ) v in =v o +1v si-3240f si-3150f si-3120f s i-3090f SI-3050F external resistor r ex1 (k ? ) 35 20 25 30 15 10 5 0 1.0 2.0 output voltage v o (v) v in =v o +1v si-3150f r ex2 =3.75k ? SI-3050F r e x 2 =1.25k ? si-3120f r ex2 =3k ? si-3090f r ex2 =2.25k ? si-3240f r ex2 =6k ? si-3000f series external variable output voltage circuit (except si-3025f)
34 typical characteristics i o vs. v dif characteristics temperature coefficient of output voltage(SI-3050F) output on/off control(SI-3050F) output voltage(SI-3050F) output voltage(si-3120f) overcurrent protection characteristics(SI-3050F) overcurrent protection characteristics(si-3120f) overcurrent protection characteristics(si-3240f) thermal protection characterist ics(SI-3050F) 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.2 0.4 0.6 output current i o (a) dropout voltage v dif (v) 0.8 1.0 5.06 5.04 5.02 5.00 4.98 4.96 4.94 ambient temperature t a ( c) output voltage v o (v) C 40 C 20 0 20 40 60 80 100 120 140 v in =8v i o =0a v o =5v output voltage v o (v) 6 5 4 3 2 1 0 0 1.0 2.0 output on/off control voltage vc (v) 3.0 4.0 v in =8v i o =10ma output voltage v o (v) 0.25a 0.5a 1.0a 6 5 4 3 2 1 0 012 34 input voltage v in (v) 56 0.75a i o = 0a input voltage v in (v) 14 12 10 8 6 4 2 0 output voltage v o (v) 0 2 4 6 8 10 12 14 16 i o =0a =0.5a =1.0a output current i o (a) 6 5 4 3 2 1 0 output voltage v o (v) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 v in =6v 12v 15v 8v 10v output voltage v o (v) 14 12 10 8 6 4 2 0 0 0.5 1.0 1.5 2.0 18v 22v output current i o (a) v in =13v 15v (t a =25 c) si-3000f series note on thermal protection: the thermal protection circuit is intended for protection against heat during instantaneous short-circuiting. its operation is not guaran- teed for continuous heating condition such as short-circuiting over extended periods of time. 6 5 4 3 2 1 0 case temperature tc ( c) output voltage v o (v) 0 20 60 100 140 180 v in =8v i o =10ma output voltage v o (v) 30 25 20 15 10 5 0 0 0.5 1 1.5 2 output current i o (a) 2.5 3 v in =27v 25 30 40v 35v
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