56 ics *5: pin 5 is the on/off pin. soft start at power on can be performed with a capacitor connected to this pin. the output can also be turned on/off with this pin. the output is stopped by setting the v oltage of this pin to v ssl or lower. on/off-pin voltage can be changed with an open-collec- tor drive circuit of a transistor. when using both the soft-start and on/off functions together, the discharge current from c 3 flows into the on/off control transistor. therefore, limit the current securely to protect the transistor if c 3 capacitance is large. the on/off pin is pulled up to the power supply in the ic, so applying the external voltage is prohibited. if this pin is not used, leave it open. *1: reference voltage for si-8015jf *3: temperature coefficient of reference voltage for si-8015jf *2: v ref for si-8015jf *4: ? v ref / ? t a f or si-8015jf si-8000jf si-8000jf on/off 5 on/off 5 on/off c3 c3 5 v out. on/off soft start soft start +v out. on/off si-8000jf lineup pa rt number si-8015jf si-8033jf si-8050jf si-8120jf v o (v)* 1.59 3.3 5.0 12.0 i o (a) 1.5 absolute maximum ratings unit v w w c c c/w ratings 43 16.6 (with infinite heatsink) 1.5 (without heatsink, standalone operation) +125 ?0 to +125 6.0 symbol v in p d1 p d2 t j t stg j-c pa r ameter dc input voltage po w er dissipation j unction temperature storage temperature thermal resistance (junction to case) recommended operating conditions pa r ameter dc input voltage range output current range operating junction temperature range symbol v in 1 v in 2 i o t jop unit v v a c ratings si-8015jf* si-8033jf si-8050jf si-8120jf v o +2 to 40 5.3 to 40 7 to 40 14 to 40 v o +3 to 40 6.3 to 40 8 to 40 15 to 40 0 to 1.5 ?0 to +125 features compact full-mold package (equivalent to t o220) output current: 1.5a high efficiency: 67 to 88% requires only 4 discrete components internally-adjusted phase correction and output voltage capable of downsize a choke-coil due to ic's high switching frequency (125khz). (compared with conventional sanken devices) built-in foldback-overcurrent and thermal protection circuits ? utput on/off available (circuit current at output off: 200 a max.) soft start available by on/off pin * si-8015jf is a variable output voltage type. the variable output voltage range is from 2.5 v to 24 v. electrical characteristics (t a =25 c) conditions i o =0 to 1a i o =0 to 1.5a v in v o +3v full-mold, separate excitation step-down switching mode regulator ics si-8000jf series applications ? ow er supplies for telecommunication equipment onboard local power supplies 1-1-2 switching mode regulator ics * v ref (v) for si-8015jf unit v % kh z mv mv mv/ c a v a ma a pa r ameter output voltage *1 efficiency oscillation frequency line regulation load regulation overcurrent protection starting current on/off *5 low level voltage te r m inal outflow current at low voltage quiescent circuit current symbol v o *2 conditions conditions f conditions ? v oline conditions ? v oload conditions ? v o / ? t a *4 i s1 conditions v ssl i ssl conditions i q conditions i q(off) conditions ratings si-8015jf si-8033jf si-8050jf si-8120jf min. typ. max. min. typ. max. min. typ. max. min. typ. max. 1.558 1.59 1.622 3.234 3.30 3.366 4.90 5.00 5.10 11.76 12.00 12.24 v in =12v, i o =0.5a v in =15v, i o =0.5a v in =20v, i o =0.5a v in =24v, i o =0.5a 67 77 82 88 v in =12v, i o =0.5a v in =15v, i o =0.5a v in =20v, i o =0.5a v in =24v, i o =0.5a 125 125 125 125 v in =12v, i o =0.5a v in =15v, i o =0.5a v in =20v, i o =0.5a v in =24v, i o =0.5a 25 80 25 80 40 100 60 130 v in =8 to 30v, i o =0.5a v in =8 to 30v, i o =1.0a v in =10 to 30v, i o =1.0a v in =18 to 30v, i o =1.0a 10 30 10 30 10 40 10 40 v in =12v, i o =0.2 to 0.8a v in =15v, i o =0.5 to 1.5a v in =20v, i o =0.5 to 1.5a v in =24v, i o =0.5 to 1.5a 0.5 0.5 0.5 1.0 1.6 1.6 1.6 1.6 v in =12v v in =15v v in =20v v in =24v 0.5 0.5 0.5 0.5 100 100 100 100 v ssl =0v v ssl =0v v ssl =0v v ssl =0v 7777 v in =12v, i o =0a v in =15v, i o =0a v in =20v, i o =0a v in =24v, i o =0a 200 200 200 200 v in =12v, v on/off =0.3v v in =15v, v on/off =0.3v v in =20v, v on/off =0.3v v in =24v, v on/off =0.3v t emperature coefficient of output voltage *3
57 ics external dimensions (to220f-5) fo r ming no.1101 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 ?.1 0.45 +0.2 ?.1 4.0 0.2 7.9 0.2 16.9 0.3 0.5 12345 p1.7 0.7 4=6.8 0.7 2.8 0.2 3.2 0.2 (unit : mm) pin assignment q v in w sw out e gnd r v os t on/off plastic mold package type flammability: ul94v-0 product mass: approx. 2.3g block diagram 4 3 gnd 2 v in on/off sw out 1 5 preg. ocp 8033jf, 8050jf, 8120jf reset osc + comp. error amp. latch& drive tsd on/off soft start v ref + 4 3 gnd 2 v in v ref on/off sw out 1 5 preg. ocp reset osc + comp. error amp. latch& drive tsd on/off soft start v ref + si-8015jf t ypical connection diagram c 1 : 50v/220 f c 2 : 25v/470 f c 3 : 10v/0.47 f (only when using soft-start function) l 1 : 100 h di : rk16 (sanken) c 1 : 50v/220 f c 2 : 25v/470 f c 3 : 10v/0.47 f (only when using soft-start function) c 4 : 6800pf l 1 : 100 h di : rk16 (sanken) v in 220 f di ref l1 470 f v in gnd on/off gnd si-8015jf sw v ref i ref r 1 r 2 c 4 12 4 3 5 + + v out gnd si-8015jf v in c 1 c 3 di l1 c 2 v in gnd on/off gnd si-8000jf sw v s 12 4 3 5 + + v out gnd 8033jf, 8050jf, 8120jf i ref shall be approx. 2ma. v out = v ref (r 1 +r 2 ) r 2 si-8000jf series
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