Document
SMX1J
Transil™
Features
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A
Peak pulse power: – 85 W (10/1000 µs) – 800 W (8/20 µs) Stand off voltage 7.5 V Unidirectional Low leakage current: – 1 µA at 25 °C – 2 µA at 85 °C Operating Tj max: 150 °C High power capability at Tjmax: 78 W
K
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µQFN 2L
Figure 1.
Functional diagram (top view)
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Complies with the following standards
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IEC 61000-4-2 level 4 – 15 kV (air discharge) – 8 kV (contact discharge) MIL STD 883G - Method 3015-7 Class 3B – 25 kV HBM (human body model)
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Description
The SMX1J7.5A www.DataSheet4U.com Transil has been designed to protect sensitive equipment against electro-static discharges according to IEC 61000-4-2, MIL STD 883 Method 3015, and electrical over stress such as IEC 61000-4-4 and 5. They are generally for surges below 85 W 10/1000 µs. The Planar technology makes it compatible with high-end equipment and SMPS where low leakage current and high junction temperature are required to provide reliability and stability over time. The SMX1J7.5A is packaged in µQFN 2 leads.
TM: Transil is a trademark of STMicroelectronics
November 2009
Doc ID 16180 Rev 2
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Characteristics
SMX1J
1
Table 1.
Symbol PPP Tstg Tj TL
Characteristics
Absolute maximum ratings (Tamb = 25 °C)
Parameter Peak pulse power dissipation (1) Storage temperature range Operating junction temperature range Maximum lead temperature for soldering during 10 s. Tj initial = Tamb Value 85 -65 to +150 -55 to +150 260 Unit W °C °C °C
1. For a surge greater than the maximum values, the diode will fail in short-circuit.
Figure 2.
Symbol VBR IRM VRM VCL Rd IPP IR αT VF = = = = = = = = =
Electrical characteristics (definitions)
Parameter Breakdown voltage Leakage current @ VRM Stand-off voltage Clamping voltage Dynamic impedance Peak pulse current Breakdown current Voltage temperature coefficient Forward voltage drop
I
IF
VCL VBR VRM I RM IR
VF
V
Slope = 1/ Rd I PP
Table 2.
Electrical characteristics - parameter values (Tamb = 25 °C)
IRM max@VRM VBR @IR min(1) min V 2 7.5 V 8.3 mA 1 VCL @IPP(2) 10/1000 µs max V 14 A 6.2 Ω 0.3 RD (3) 10/1000 µs VCL @IPP(2) 8/20 µs max V 20 A 40 Ω 0.2 RD (3) 8/20 µs αT (4) max 10-4/ °C 6.5
Type
25 °C 85 °C µA
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SMX1J7.5A
1
1. Pulse test : tp < 50 ms 2. Surge capability given for both directions for unidirectional and bidirectional types 3. To calculate maximum clamping voltage at other surge level, use the following formula VCLmax = VCL - RD x ( IPP - IPPappli) where IPPappli is the surge current in the application 4. To calculate VBR or VCL versus junction temperature, use the following formule: VBR @ Tj = VBR @ 25 °C x (1 + αT x (Tj – 25)) VCL @ Tj = VCL @ 25 °C x (1 + αT x (Tj – 25))
Figure 3.
Pulse waveform
%Ipp 100 50 0 Repetitive pulse current tr = rise time (µs) tp = pulse duration time (µs)
tr
tp
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Doc ID 16180 Rev 2
SMX1J
Characteristics
Figure 4.
Peak pulse power dissipation versus initial junction temperature
Figure 5.
Peak pulse power versus exponential pulse duration
100.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0
PPP(W)
10000
PPP (W)
Tj initial = 25 °C
1000
100
Tj(°C)
0 25 50 75 100 125 150 175
10 1 10 100 1000
t P (µs)
10000
Figure 6.
Clamping voltage versus peak pulse current (exponential waveform, typical values)
Figure 7.
Junction capacitance versus reverse applied voltage (typical values)
F = 1 MHz VOSC = 30 mVRMS Tj = 25 °C
10
IPP (A)
400 375 350 325 300 275 250 225 200 175
C(pF)
10/1000 µs Tjinitial = 25 °C
1
150 125
Vcl (V)
9 11
VLINE (V)
0 1 2 3 4 5
100
Figure 8.
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Forward voltage drop versus peak forward current (typical values)
Figure 9.
Ir I (nA)
500
Leakage current versus junction temperature (typical values)
I FM (A)
400
1
300
200
0.1
100
0.01 0.5 1.0 1.5
VFM (V)
2.0
0 25
Tj (°C) °
50 75 100 125 150
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Ordering information scheme
SMX1J
2
Ordering information scheme
Figure 10. Ordering information scheme
SM X 1 J7.5 A TR
Surface Mount
Package X = µQFN-2L
Peak Pulse Power 1 = 100 W (typical value) Stand off voltage 7.5 = 7.5 V
Type A = Unidirectional Delivery mode TR = Tape and reel
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Doc ID 16180 Rev 2
SMX1J
Package information
3
Package information
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Terminals: Solder plated, solderable per MIL-STD-750, Method 2026 Flammability: Epoxy is rated UL94V-0 RoHS package
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. Table 3. µQFN 2L dimensions
Dimensions Ref Millimetres Min A A1 b1 D E e L1 0.95 0.75 0.51 0.00 0.25 Typ 0.55 0.02 0.30 1.45 1.00 1.00 0.80 Max Min Inches Typ Max
0.60 0.020 0.022 0.024 0.05 0.000 0.001 0.002 0.35 0.010 0.012 0.014 0.057 0.039 1.05 0.037 0.039 0.041 0.85 0.030 0.031 0.033
Figure 11. Footprint dimensio.