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www.irf.com 1 irf3706pbf irf3706spbf smps mosfet hexfet power mosfet benefits ultra-low gate impedance very low r ds(on) at 4.5v v gs fully characterized avalanche voltage and current v dss r ds(on) max i d 20v 8.5m ? 77a notes through are on page 11 d 2 pak irf3706s to-220ab irf3706 to-262 irf3706l IRF3706LPBF high frequency dc-dc isolated converters with synchronous rectification for telecom and industrial use applications high frequency buck converters for computer processor power lead-free
irf3706/s/lpbf 2 www.irf.com
irf3706/s/lpbf www.irf.com 3 fig 2. typical output characteristics fig 1. typical output characteristics fig 3. typical transfer characteristics fig 4. normalized on-resistance vs. temperature
irf3706/s/lpbf 4 www.irf.com fig 6. typical gate charge vs. gate-to-source voltage fig 5. typical capacitance vs. drain-to-source voltage fig 7. typical source-drain diode forward voltage fig 8. maximum safe operating area
irf3706/s/lpbf www.irf.com 5 fig 11. maximum effective transient thermal impedance, junction-to-case fig 9. maximum drain current vs. case temperature fig 10a. switching time test circuit v ds 9 0% 1 0% v gs t d(on) t r t d(off) t f fig 10b. switching time waveforms
1 0.1 %
+ -
irf3706/s/lpbf 6 www.irf.com q g q gs q gd v g charge d.u.t. v d s i d i g 3ma v gs .3 f 50k ? .2 f 12v current regulator same type as d.u.t. current sampling resistors + -

!"!
!"! t p v (br)dss i as
#$% & ' ( r g i as 0.01 ? t p d.u.t l v ds + - v dd driver a 15v 20v v gs
irf3706/s/lpbf www.irf.com 7
p.w. period di/dt diode recovery dv/dt ripple 5% body diode forward drop r e-applied v oltage reverse recovery current body diode forward current v gs =10v v dd i sd driver gate drive d.u.t. i sd waveform d.u.t. v ds waveform inductor curent d = p. w . period + - + + + - - - ? ? ?

) !"! ? "#$ ? % & ? "#"'( ! )* ) &)
)&!+ *+ ))) ,- )"(" . for n-channel hexfet ? power mosfets
irf3706/s/lpbf 8 www.irf.com lead assignments 1 - gate 2 - drain 3 - source 4 - drain - b - 1.32 (.052) 1.22 (.048) 3x 0.55 (.022) 0.46 (.018) 2.92 (.115) 2.64 (.104) 4.69 (.185) 4.20 (.165) 3x 0.93 (.037) 0.69 (.027) 4.06 (.160) 3.55 (.140) 1.15 (.045) min 6.47 (.255) 6.10 (.240) 3.78 (.149) 3.54 (.139) - a - 10.54 (.415) 10.29 (.405) 2.87 (.113) 2.62 (.103) 15.24 (.600) 14.84 (.584) 14.09 (.555) 13.47 (.530) 3x 1.40 (.055) 1.15 (.045) 2.54 (.100) 2x 0.36 (.014) m b a m 4 1 2 3 notes: 1 dimensioning & tolerancing per ansi y14.5m, 1982. 3 outline conforms to jedec outline to-220ab. 2 controlling dimension : inch 4 heatsink & lead measurements do n ot include burrs. hexfet 1- gate 2- drain 3- source 4- drain lead assignments igbts, copac k 1- gate 2- collector 3- emitter 4- collector

dimensions are shown in millimeters (inches)

example: in the assembly line "c" t his is an ir f1010 lot code 1789 as s e mb led on ww 19, 1997 part numbe r as s e mb l y lot code dat e code year 7 = 1997 line c we e k 19 logo rectifier int ernat ional note: "p" in assembly line position indicates "lead-free"
irf3706/s/lpbf www.irf.com 9

dimensions are shown in millimeters (inches) note: "p" in as s embly line pos i ti on i ndi cates "l ead- f r ee" f 530s this is an irf530s with lot code 8024 as s e mb l e d on ww 02, 2000 in the assembly line "l" as s e mb l y lot code int ernat ional rectifier logo part numbe r dat e code year 0 = 2000 we e k 02 line l f530s a = as s e mb l y s i t e code we e k 02 p = de s ignat e s l e ad- f r e e product (optional) rect ifier int ernational logo lot code as s e mb l y year 0 = 2000 dat e code part number
irf3706/s/lpbf 10 www.irf.com to-262 part marking information to-262 package outline dimensions are shown in millimeters (inches) as s e mb l y lot code rectifier int ernat ional as s e mb le d on ww 19, 1997 note: "p" in ass embly line pos ition indicates "l ead-f ree" in the assembly line "c" logo t his is an ir l3103l l ot code 1789 example: line c date code week 19 ye ar 7 = 1997 part number part number logo lot code assembly int ernational rectifier product (optional) p = designat es lead-f ree a = assembly site code we e k 19 ye ar 7 = 1997 date code or
irf3706/s/lpbf www.irf.com 11
repetitive rating; pulse width limited by max. junction temperature. starting t j = 25c, l = 0.54mh, r g = 25 ? , i as = 28a. pulse width 400s; duty cycle 2%. this is only applied to to-220ab pakcage. this is applied to d 2 pak, when mounted on 1" square pcb (fr- 4 or g-10 material). for recommended footprint and soldering techniques refer to application note #an-994. calculated continuous current based on maximum allowable junction temperature. package limitation current is 75a. data and specifications subject to change without notice. ir world headquarters: 233 kansas st., el segundo, california 90245, usa tel: (310) 252-7105 tac fax: (310) 252-7903 visit us at www.irf.com for sales contact information . 06/04

dimensions are shown in millimeters (inches) 3 4 4 trr f eed direction 1.85 (.073) 1.65 (.065) 1.60 (.063) 1.50 (.059) 4.10 (.161) 3.90 (.153) trl f eed direction 10.90 (.429) 10.70 (.421) 16.10 (.634) 15.90 (.626) 1.75 (.069) 1.25 (.049) 11.60 (.457) 11.40 (.449) 15.42 (.609) 15.22 (.601) 4.72 (.136) 4.52 (.178) 24.30 (.957 ) 23.90 (.941 ) 0.368 (.0145) 0.342 (.0135) 1.60 (.063) 1.50 (.059) 13.50 (.532) 12.80 (.504) 330.00 (14.173) max. 27.40 (1.079) 23.90 (.941) 60.00 (2.362 ) min. 30.40 (1.197) max. 26.40 (1.039) 24.40 (.961) notes : 1. comforms to eia-418. 2. controlling dimension: millimeter. 3. dimension measured @ hub. 4. includes flange distortion @ outer edge.
note: for the most current drawings please refer to the ir website at: http://www.irf.com/package/

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