STD40NF02L n-channel 20v - 0.0095 w - 40a dpak low gate charge stripfet ? power mosfet preliminary data n typical r ds(on) = 0.0095 w n typical q g = 35 nc @ 10v n optimal r ds(on) x q g trade-off n conduction losses reduced n switching losses reduced description this application specific power mosfet is the third generation of stmicroelectronics unique "single feature size ? " strip-based process. the resul- ting transistor shows the best trade-off between on-resistance and gate charge. when used as high and low side in buck regulators, it gives the best performance in terms of both conduction and switching losses. this is extremely important for motherboards where fast switching and high effi- ciency are of paramount importance. applications n specifically designed and optimised for high efficiency cpu core dc/dc converters ? internal schematic diagram september 2000 absolute maximum ratings symbol parameter value unit v ds drain-source voltage (v gs = 0) 20 v v dgr drain- gate voltage (r gs = 20 k w )20v v gs gate-source voltage 20 v i d ( ) drain current (continuous) at t c = 25 o c20a i d ( ) drain current (continuous) at t c = 100 o c20a i dm ( ) drain current (pulsed) 80 a p tot total dissipation at t c = 25 o c55w derating factor 0.37 w/ o c t stg storage temperature -65 to 175 o c t j max. operating junction temperature 175 o c ( ) current limited by the package ( ) pulse width limited by safe operating area type v dss r ds(on) i d STD40NF02L 20 v < 0.0115 w 40 a add suffix "t4" for ordering in tape & reel 1 3 dpak to-252 (suffix "t4") 1/6
thermal data r thj-case r thj-amb t l thermal resistance junction-case max thermal resistance junction-ambient max maximum lead temperature for soldering purpose 2.73 62.5 300 o c/w o c/w o c electrical characteristics (t case = 25 o c unless otherwise specified) off symbol parameter test conditions min. typ. max. unit v (br)dss drain-source breakdown voltage i d = 250 m a v gs = 0 20 v i dss zero gate voltage drain current (v gs = 0) v ds = max rating v ds = max rating t c =125 o c 1 10 m a m a i gss gate-body leakage current (v ds = 0) v gs = 20 v 100 na on ( * ) symbol parameter test conditions min. typ. max. unit v gs(th) gate threshold voltage v ds = v gs i d = 250 m a 1 2.5 v r ds(on) static drain-source on resistance v gs = 10v i d = 20 a v gs = 5v i d = 20 a 0.0095 0.015 0.0115 0.019 w w i d(on) on state drain current v ds > i d(on) x r ds(on)max v gs = 10 v 20 a dynamic symbol parameter test conditions min. typ. max. unit g fs ( * ) forward transconductance v ds > i d(on) x r ds(on)max i d =20 a 40 s c iss c oss c rss input capacitance output capacitance reverse transfer capacitance v ds = 25 v f = 1 mhz v gs = 0 1500 900 200 pf pf pf STD40NF02L 2/6
electrical characteristics (continued) switching on symbol parameter test conditions min. typ. max. unit t d(on) t r turn-on delay time rise time v dd = 15 v i d = 20 a r g = 4.7 w v gs = 4.5 v (resistive load, see fig. 3) 20 170 ns ns q g q gs q gd total gate charge gate-source charge gate-drain charge v dd = 16 v i d = 20 a v gs = 10 v 36 5 10 45 nc nc nc switching off symbol parameter test conditions min. typ. max. unit t d(off) t f turn-off delay time fall time v dd = 15 v i d = 20 a r g = 4.7 w v gs = 4.5 v (resistive load, see fig. 3) 40 60 ns ns source drain diode symbol parameter test conditions min. typ. max. unit i sd i sdm ( ) source-drain current source-drain current (pulsed) 20 80 a a v sd ( * ) forward on voltage i sd =20 a v gs = 0 1.2 v t rr q rr i rrm reverse recovery time reverse recovery charge reverse recovery current i sd = 20 a di/dt = 100 a/ m s v dd = 15 v t j = 150 o c (see test circuit, fig. 5) 70 105 2.4 ns m c a ( * ) pulsed: pulse duration = 300 m s, duty cycle 1.5 % ( ) pulse width limited by safe operating area STD40NF02L 3/6
fig. 1: unclamped inductive load test circuit fig. 3: switching times test circuits for resistive load fig. 2: unclamped inductive waveform fig. 4: gate charge test circuit fig. 5: test circuit for inductive load switching and diode recovery times STD40NF02L 4/6
dim. mm inch min. typ. max. min. typ. max. a 2.2 2.4 0.086 0.094 a1 0.9 1.1 0.035 0.043 a2 0.03 0.23 0.001 0.009 b 0.64 0.9 0.025 0.035 b2 5.2 5.4 0.204 0.212 c 0.45 0.6 0.017 0.023 c2 0.48 0.6 0.019 0.023 d 6 6.2 0.236 0.244 e 6.4 6.6 0.252 0.260 g 4.4 4.6 0.173 0.181 h 9.35 10.1 0.368 0.397 l2 0.8 0.031 l4 0.6 1 0.023 0.039 == d l2 l4 1 3 == b e == b2 g 2 a c2 c h a1 detail "a" a2 detail "a" to-252 (dpak) mechanical data 0068772-b STD40NF02L 5/6
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