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www.irf.com 1 2/13/04 irf6609 hexfet power mosfet notes through are on page 10 low conduction losses low switching losses ideal synchronous rectifier mosfet low profile (<0.7 mm) dual sided cooling compatible compatible with existing surface mount techniques description the irf6609 combines the latest hexfet? power mosfet silicon technology with the advanced directfet tm packaging to achieve the lowest on-state resistance in a package that has the footprint of an so-8 and only 0.7 mm profile. the directfet package is co mpatible with existing layout geometries used in power applications, pcb assembly equipment and vapor phase, infra-red or convection sol dering techniques, when application note an-1035 is followed regarding the manufacturing methods and processes. the directfet package allows dual sided cooling to maximize thermal transfer in power systems, improving previous best thermal resistance by 80%. the irf6609 balances both low resistance and low charge along with ultra low package inductance to reduce both conduction and switching losses. the reduced total losses make this product ideal for high efficiency dc-dc converters that power the latest g eneration of processors operating at higher frequencies. the irf6609 has been optimized for parameters that are critical in synchronous buck operating from 12 volt buss converters including rds(on), gate charge and cdv/dt-induced turn on immunity. the irf6609 offers particularly low rds(on) and high cdv/dt immunity for synchronous fet applications . v dss r ds(on) max qg 20v 2.0m ? @v gs = 10v 46nc 2.6m ? @v gs = 4.5v absolute maximum ratings parameter units v ds drain-to-source voltage v v gs gate-to-source voltage i d @ t c = 25c continuous drain current, v gs @ 10v i d @ t a = 25c continuous drain current, v gs @ 10v a i d @ t a = 70c continuous drain current, v gs @ 10v i dm p u l se d d ra i n c urrent p d @t a = 25c p ower di ss i pat i on p d @t a = 70c p ower di ss i pat i on w p d @t c = 25c power dissipation linear derating factor w/c t j operating junction and c t stg storage temperature range thermal resistance parameter typ. max. units r ja j unct i on-to- a m bi ent ??? 45 r ja j unct i on-to- a m bi ent 12.5 ??? r ja j unct i on-to- a m bi ent 20 ??? c/w r jc j unct i on-to- c ase ??? 1.4 r j-pcb junction-to-pcb mounted 1.0 ??? -40 to + 150 2.8 0.022 1.8 89 max. 31 25 250 20 20 150 directfet isometric sq sx st mq mx mt applicable directfet outline and substrate outline (see p.8,9 for details)
2 www.irf.com s d g static @ t j = 25c (unless otherwise specified) parameter min. typ. max. units bv dss drain-to-source breakdown voltage 20 ??? ??? v ? v dss / ? t j breakdown voltage temp. coefficient ??? 15 ??? mv/c r ds(on) static drain-to-source on-resistance ??? 1.6 2.0 m ? ??? 2.0 2.6 v gs(th) gate threshold voltage 1.55 ??? 2.45 v ? v gs(th) / ? t j gate threshold voltage coefficient ??? -6.1 ??? mv/c i dss drain-to-source leakage current ??? ??? 1.0 a ??? ??? 150 i gss gate-to-source forward leakage ??? ??? 100 na gate-to-source reverse leakage ??? ??? -100 gfs forward transconductance 91 ??? ??? s q g total gate charge ??? 46 69 q gs1 pre-vth gate-to-source charge ??? 15 ??? q gs2 post-vth gate-to-source charge ??? 4.7 ??? nc q gd gate-to-drain charge ??? 15 ??? q godr gate charge overdrive ??? 11 ??? see fig. 17 q sw switch charge (q gs2 + q gd ) ??? 20 ??? q oss output charge ??? 26 ??? nc t d(on) turn-on delay time ??? 24 ??? t r rise time ??? 95 ??? t d(off) turn-off delay time ??? 26 ??? ns t f fall time ??? 9.8 ??? c iss input capacitance ??? 6290 ??? c oss output capacitance ??? 1850 ??? pf c rss reverse transfer capacitance ??? 860 ??? avalanche characteristics parameter units e as single pulse avalanche energy mj i ar avalanche current a diode characteristics parameter min. typ. max. units i s continuous source current ??? ??? 31 (body diode) a i sm pulsed source current ??? ??? 250 (body diode) v sd diode forward voltage ??? 0.80 1.2 v t rr reverse recovery time ??? 32 48 ns q rr reverse recovery charge ??? 26 39 nc typ. ??? ??? i d = 17a v gs = 0v v ds = 10v i d = 25a 230 25 max. t j = 25c, i f = 25a di/dt = 100a/s t j = 25c, i s = 25a, v gs = 0v showing the integral reverse p-n junction diode. conditions v gs = 0v, i d = 250a reference to 25c, i d = 1ma v gs = 10v, i d = 31a v gs = 4.5v, i d = 25a v ds = v gs , i d = 250a v ds = 16v, v gs = 0v v ds = 16v, v gs = 0v, t j = 150c v gs = 20v v gs = -20v v gs = 4.5v mosfet symbol clamped inductive load v ds = 10v, i d = 25a conditions ? = 1.0mhz v ds = 10v, v gs = 0v v dd = 16v, v gs = 4.5v v ds = 10v
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 0.1 1 10 100 v ds , drain-to-source voltage (v) 0.1 1 10 100 1000 i d , d r a i n - t o - s o u r c e c u r r e n t ( a ) 60s pulse width tj = 25c 2.7v vgs top 10v 7.0v 4.5v 4.0v 3.5v 3.2v 2.9v bottom 2.7v 0.1 1 10 100 v ds , drain-to-source voltage (v) 1 10 100 1000 i d , d r a i n - t o - s o u r c e c u r r e n t ( a ) 60s pulse width tj = 150c 2.7v vgs top 10v 7.0v 4.5v 4.0v 3.5v 3.2v 2.9v bottom 2.7v 2.0 3.0 4.0 5.0 v gs , gate-to-source voltage (v) 0.1 1.0 10.0 100.0 1000.0 i d , d r a i n - t o - s o u r c e c u r r e n t ( ) v ds = 10v 60s pulse width t j = 25c t j = 150c -60 -40 -20 0 20 40 60 80 100 120 140 160 t j , junction temperature (c) 0.5 1.0 1.5 r d s ( o n ) , d r a i n - t o - s o u r c e o n r e s i s t a n c e ( n o r m a l i z e d ) i d = 31a v gs = 10v
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 1 10 100 v ds , drain-to-source voltage (v) 100 1000 10000 100000 c , c a p a c i t a n c e ( p f ) coss crss ciss v gs = 0v, f = 1 mhz c iss = c gs + c gd , c ds shorted c rss = c gd c oss = c ds + c gd 0 20 40 60 80 100 120 q g total gate charge (nc) 0 2 4 6 8 10 12 v g s , g a t e - t o - s o u r c e v o l t a g e ( v ) v ds = 20v vds= 10v i d = 17a 0.0 0.4 0.8 1.2 1.6 2.0 v sd , source-to-drain voltage (v) 0.1 1.0 10.0 100.0 1000.0 i s d , r e v e r s e d r a i n c u r r e n t ( a ) t j = 25c t j = 150c v gs = 0v 0 1 10 100 v ds , drain-tosource voltage (v) 0.1 1 10 100 1000 i d , d r a i n - t o - s o u r c e c u r r e n t ( a ) tc = 25c tj = 150c single pulse 1msec 10msec operation in this area limited by r ds (on) 100sec
www.irf.com 5 fig 11. maximum effective transient thermal impedance, junction-to-ambient fig 10. threshold voltage vs. temperature fig 9. maximum drain current vs. case temperature 1e-006 1e-005 0.0001 0.001 0.01 0.1 1 10 100 t 1 , rectangular pulse duration (sec) 0.0001 0.001 0.01 0.1 1 10 100 t h e r m a l r e s p o n s e ( z t h j a ) 0.20 0.10 d = 0.50 0.02 0.01 0.05 single pulse ( thermal response ) notes: 1. duty factor d = t1/t2 2. peak tj = p dm x zthja + tc j j 1 1 2 2 3 3 r 1 r 1 r 2 r 2 r 3 r 3 ci i / ri ci= i / ri c 4 4 r 4 r 4 ri (c/w) i (sec) 0.6784 0.00086 17.299 0.57756 17.566 8.94 9.4701 106 -75 -50 -25 0 25 50 75 100 125 150 t j , temperature ( c ) 1.0 1.5 2.0 2.5 v g s ( t h ) g a t e t h r e s h o l d v o l t a g e ( v ) i d = 250a 25 50 75 100 125 150 t j , junction temperature (c) 0 30 60 90 120 150 i d , d r a i n c u r r e n t ( a )
6 www.irf.com fig 13c. maximum avalanche energy vs. drain current fig 14a. switching time test circuit fig 14b. switching time waveforms v gs v ds 90% 10% t d(on) t d(off) t r t f v gs pulse width < 1s duty factor < 0.1% v dd v ds l d d.u.t + - fig 13b. unclamped inductive waveforms fig 13a. unclamped inductive test circuit 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 fig 12. on-resistance vs. gate voltage 25 50 75 100 125 150 starting t j , junction temperature (c) 0 200 400 600 800 1000 e a s , s i n g l e p u l s e a v a l a n c h e e n e r g y ( m j ) i d top 11a 14a bottom 25a 2.0 4.0 6.0 8.0 10.0 v gs , gate-to-source voltage (v) 0 2 4 6 8 10 r d s ( o n ) , d r a i n - t o - s o u r c e o n r e s i s t a n c e ( m ? ) t j = 25c t j = 125c i d = 31a
www.irf.com 7 d.u.t. v ds i d i g 3ma v gs .3 f 50k ? .2 f 12v current regulator same type as d.u.t. current sampling resistors + - fig 16. gate charge test circuit fig 15.
for n-channel hexfet power mosfets
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? ? p.w. period di/dt diode recovery dv/dt ripple 5% body diode forward drop re-applied voltage 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

+ - + + + - - - ?
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# $$ ? !"!!%" fig 17. gate charge waveform vds vgs id vgs(th) qgs1 qgs2 qgd qgodr
8 www.irf.com directfet outline dimension, mt outline (medium size can, t-designation). please see directfet application note an-1035 for all details regarding the assembly of directfet. this includes all recommendations for stencil and substrate designs.
www.irf.com 9 directfet substrate and pcb layout, mt outline (medium size can, t-designation). please see directfet application note an-1035 for all details regarding the assembly of directfet. this includes all recommendations for stencil and substrate designs. directfet tape & reel dimension (showing component orientation). metric min 330.0 20.2 12.8 1.5 100.0 n.c 12.4 11.9 code a b c d e f g h max n.c n.c 0.520 n.c n.c 0.724 0.567 0.606 min 12.992 0.795 0.504 0.059 3.937 n.c 0.488 0.469 max n.c n.c 13.2 n.c n.c 18.4 14.4 15.4 imperial standard option (qty 4800) note: controlling dimensions in mm std reel quantity is 4800 parts. (ordered as irf6618). for 1000 parts on 7" reel, order irf6618tr1 metric imperial tr1 option (qty 1000) min 177.77 19.06 13.5 1.5 58.72 n.c 11.9 11.9 max n.c n.c 12.8 n.c n.c 13.50 12.01 12.01 min 6.9 0.75 0.53 0.059 2.31 n.c 0.47 0.47 max n.c n.c 0.50 n.c n.c 0.53 n.c n.c reel dimensions

10 www.irf.com data and specifications subject to change without notice. this product has been designed and qualified for the consumer market. qualification standards can be found on ir?s web site. 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 . 1/04 directfet part marking repetitive rating; pulse width limited by max. junction temperature. starting t j = 25c, l = 0.75mh, r g = 25 ? , i as = 25a. pulse width 400s; duty cycle 2%. surface mounted on 1 in. square cu board.
used double sided cooling , mounting pad. mounted on minimum footprint full size board with metalized back and with small clip heatsink. t c measured with thermal couple mounted to top (drain) of part. r is measured at

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