november 2010 doc id 3484 rev 2 1/6 6 tmbat49 small signal schottky diode features very low turn-on voltage fast switching description the tmbat49 is a general purpose metal to silicon diode. this device has integrated protection against excessive voltage such as electrostatic discharges. melf (glass) www.st.com
characteristics tmbat49 2/6 doc id 3484 rev 2 1 characteristics table 1. absolute ratings (limiting values) symbol parameter value unit v rrm repetitive peak reverse voltage 80 v i f forward continuous current t j = 70 c 500 ma i frm repetitive peak forward current t p = 1 s 0.5 3a i fsm surge non repetitive forward current t p = 10 ms 10 a t stg storage temperature range - 65 to +150 c t j operating junction temperature range - 65 to +125 c t l maximum lead soldering temperature during 15 s 260 c table 2. thermal parameter symbol parameter value unit r th(j-l) junction to lead 110 c/w table 3. static electrical characteristics symbol parameter test conditions min. typ. max. unit i r (1) 1. pulse test: t p 300 s, < 2% reverse leakage current t j = 25 c v r = 80 v - - 200 a v f (1) forward voltage drop t j = 25 c i f = 10 ma - - 0.32 v i f = 100 ma - - 0.42 i f = 1 a - - 1 table 4. dynamic characteristics (t j = 25 c) symbol parameter test conditions min. typ. max. unit c diode capacitance f = 1 mhz v r = 0 v - 120 - pf v r = 5 v - 35 -
tmbat49 characteristics doc id 3484 rev 2 3/6 figure 1. forward voltage drop versus forward current (typical values, low level) figure 2. forward voltage drop versus forward current (typical values, high level) 1.e-02 1.e-01 1.e+00 1.e+01 1.e+02 1.e+03 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 t = 100 c j t = 25 c j t = 55 c j v (v) fm i (ma) fm 0 1 2 3 4 5 6 7 8 9 10 0.00 0.25 0.50 0.75 1.00 1.25 1.50 t = 25 c j v (v) fm i (a) fm figure 3. reverse leakage current versus reverse voltage applied (typical values) figure 4. junction capacitance versus reverse voltage applied (typical values) 1.e-03 1.e-02 1.e-01 1.e+00 1.e+01 0 1020304050607080 t = 125 c j t = 100 c j t = 75 c j t = 50 c j t = 25 c j v (v) r i (ma) r 10 100 1 10 100 f = 1 mhz v = 30 mv t = 25 c osc j v (v) r c(pf) figure 5. non-repetitive peak surge forward current versus pulse duration (square waveform) figure 6. non-repetitive peak surge forward current versus number of cycles 0 5 10 15 20 25 0.1 1.0 10.0 i (a) fsm t (ms) p 1 10 1 10 100 number of cycles one cycle t =10 ms p i (a) fsm
package information tmbat49 4/6 doc id 3484 rev 2 2 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. figure 7. footprint (dimensions in mm) table 5. melf package dimensions ref. dimensions millimeters inches min. typ. max. min. typ. max. a 4.80 5.20 0.189 0.205 ? b 2.50 2.65 0.098 0.104 c 0.45 0.60 0.018 0.024 ? d 2.50 0.098 ?b a c c ?d 4 6.5 3
tmbat49 ordering information doc id 3484 rev 2 5/6 3 ordering information 4 revision history table 6. ordering information order code marking package weight base qty delivery mode tmbat49film cathode ring melf (glass) 0.15 g 1500 bulk table 7. document revision history date revision changes aug-1999 1a previous release. 12-nov-2010 2 added ecopack statement. updated graphics in section 1 .
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