SLVU2.8Q Low Voltage TVS Diode for Automotive Applications PROTECTION PRODUCTS Features Description 400 Watts peak pulse power (tp = 8/20μs) Transient protection for high speed data lines to The SLVU2.8Q transient voltage suppressor is rated to Grade 3 of AEC-Q100 for use in automotive applications. It is specifically designed to protect sensitive components which are connected to data and transmission lines from overvoltage events. It may be used to protect one single ended line operating up to 2.8 Volts. The SLVU2.8Q is constructed using Semtech’s proprietary EPD process technology. The EPD process provides a true low operating voltage of 2.8 Volts for maximum circuit protection. The SLVU2.8Q features high ESD capability (+/-25kV contact, +/-30kV air per IEC 61000-4-2), low clamping voltage, and is rated to absorb up to 24A for an 8/20us duration pulse. Since the SLVU2.8Q is constructed using solid-state siliconavalanche technology, it will not degrade as long as it is operated within data sheet parameters. Mechanical Characteristics The SLVU2.8Q is in a 3-lead SOT23 package. The leads are finished with matte tin. This device is a PbFree, Halogen Free, RoHS/WEEE compliant product. JEDEC SOT-23 3L package Pb-Free, Halogen Free, RoHS/WEEE Compliant Molding compound flammability rating: UL 94V-0 Marking: Marking Code Packaging: Tape and Reel Applications Analog Video Navigation Systems Touch Panels Circuit Diagram 1 IEC 61000-4-2 (ESD) ±30kV (air), ±25kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 24A (8/20μs) One device protects one unidirectional line Qualified to AEC-Q100, Grade 3 Low leakage current Low operating and clamping voltages Solid-state silicon-avalanche technology Schematic and PIN Configuration 1 3 3 2 2 SOT-23 3L (Top View) Revision 3/23/2011 1 www.semtech.com SLVU2.8Q PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20μs, T=25oC) Pp k 400 Watts Peak Pulse Current (tp = 8/20μs, T=25oC) IP P 24 A VESD +/- 30 +/- 25 KV TJ -40 to +85 o TSTG -55 to +125 o ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) Operating Temperature Storage Temperature C C Electrical Characteristics (T=25oC Unless Otherwise Specified) Parameter Symbol Conditions VRWM Pin 3 to 1 or Pin 2 to 1 T = -40 to +85oC Punch-Through Voltage V PT IPT = 2μA, T=25°C Pi n 3 to 1 3.2 V Punch-Through Voltage V PT IPT = 2μA, T=85°C Pi n 3 to 1 2.8 V Snap -Back Voltage VSB ISB = 50mA, Pin 3 to 1 2.8 V Reverse Leakage Current IR VRWM = 2.8V, T=25°C Pin 3 to 1 or Pin 2 to 1 0.250 μA Reverse Leakage Current IR VRWM = 2.8V, T=85°C Pin 3 to 1 or Pin 2 to 1 0.300 μA Reverse Leakage Current IR D VRWM = 2.8V, T=25°C Pi n 3 to 2 1 μA Reverse Leakage Current IR D VRWM = 2.8V, T=85°C Pi n 3 to 2 3 μA Reverse Breakdown Voltage V BR IT= 10μA, Pin 3 to 2 Reverse Stand-Off Voltage © 2011 Semtech Corp. 2 Minimum 100 Typical Maximum Units 2.8 V V www.semtech.com SLVU2.8Q PROTECTION PRODUCTS Electrical Characteristics (T=25oC Unless Otherwise Specified) - Con’t Parameter Symbol Conditions Clamp ing Voltage VC Clamp ing Voltage Maximum Units IPP = 2A, tp = 8/20μs Pi n 3 to 1 3.9 V VC IPP = 5A, tp = 8/20μs Pi n 3 to 1 7 V Clamp ing Voltage VC IPP = 24A, tp = 8/20μs Pi n 3 to 1 12.5 V Clamp ing Voltage VC IPP = 5A, tp = 8/20μs Pi n 2 to 1 8.5 V Clamp ing Voltage VC IPP = 24A, tp = 8/20μs Pi n 2 to 1 15 V Junction Cap acitance Cj Pin 3 to 1 and 2 (Pin 1 and 2 tied together) VR = 0V, f = 1MHz 40 100 pF Junction Cap acitance Cj Pin 2 to 1 (p in 3 N .C.) VR = 0V, f = 1MHz 1.5 5 pF © 2011 Semtech Corp. 3 Minimum Typical www.semtech.com SLVU2.8Q PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 110 100 90 % of Rated Power or PI P Peak Pulse Power - Ppk (kW) 10 1 0.1 80 70 60 50 40 30 20 10 0 0.01 0 0.1 1 10 100 25 50 1000 75 100 125 150 Ambient Temperature - TA (oC) Pulse Duration - tp (µs) Pulse Waveform Clamping Voltage vs. Peak Pulse Current (Pin 3 to Pin 1,2) 110 80 70 e 60 14 Clamping Voltage Vc - (V) 90 Percent of IPP 16 Waveform Parameters: tr = 8µs td = 20µs 100 -t 50 40 td = IPP/2 30 20 12 10 8 6 4 Waveform Parameters: tr = 8us td = 20us 2 10 0 0 0 5 10 15 20 25 0 30 5 10 15 20 Peak Pulse Current Ipp - (A) Time (us) Forward Voltage vs. Forward Current (Pin 2 to Pin 3) Normalized Capacitance vs. Reverse Voltage (T = 25oC) 6 1.2 5 1 CJ(VR) / CJ(VR=0) Forward Voltage - Vf (V) Pin 2 to Pin 1 4 3 2 Waveform Parameters: tr = 8s td = 20s 1 0.8 Pin 3 to Pin 1 and 2 0.6 0.4 0.2 0 0 0 5 © 2011 Semtech Corp. 10 15 20 Forward Current - If (A) 25 0 30 0.5 1 1.5 2 2.5 3 Reverse Voltage - VR (V) 4 www.semtech.com SLVU2.8Q PROTECTION PRODUCTS Typical Characteristics Normalized Capacitance vs. Temperature (Pin 3 to 1, 2) Normalized Capacitance vs. Temperature (Pin 2 to 1) 1.2 2.5 2 o Cj(T) / Cj(T=25 C) 0.8 o Cj(T) / Cj(T=25 C) 1 0.6 0.4 1.5 1 0.5 0.2 0 0 -50 -30 -10 10 30 50 70 -50 90 -10 10 30 50 70 90 Temperature ( ºC ) Reverse Leakage Current vs. Temperature (Pin 3 to 1, 2) Punch-Through Voltage vs. Temperature (Pin 3 to 1, 2) 10000 5.0 Punch Through Voltage (VPT) - ( V ) Reverse Leakage (IR) ( nA ) -30 Temperature ( ºC ) 1000 100 10 1 0 20 40 60 Temperature ( ºC ) 80 4.0 3.0 2.0 1.0 0.0 100 -50 -30 -10 10 30 50 70 90 Temperature ( ºC ) ESD Clamping (Pin 3 to 1, 2) (8kV Contact per IEC 61000-4-2) ESD Clamping (Pin 1, 2 to 3) (-8kV Contact per IEC 61000-4-2) Note: ESD data is taken with a 10x attenuator © 2011 Semtech Corp. 5 www.semtech.com SLVU2.8Q PROTECTION PRODUCTS Applications Information SLVU2.8Q Circuit Diagram Device Connection Options 1 Electronic equipment is susceptible to transient disturbances from a variety of sources including: ESD to an open connector or interface, direct or nearby lightning strikes to cables and wires, and charged cables “hot plugged” into I/O ports. The SLVU2.8Q is designed to protect sensitive components from damage and latchup which may result from such transient events. The SLVU2.8Q can be configured to protect either one unidirectional line or two (one line pair) high-speed data lines. The options for connecting the devices are as follows: 3 2 Protection of one unidirectional line 1 . Protection of one unidirectional I/O line: Protection of one data line is achieved by connecting pin 3 to the protected line, and pins 1 and 2 to ground. This connection option will allow the device to operate on lines with positive polarity signal transitions (during normal operation). In this configuration, the device adds a maximum loading capacitance of 100pF. During positive duration transients, the internal TVS diode will be reversed biased and will act in the avalanche mode, conducting the transient current from pin 3 to 1. The transient will be clamped at or below the rated clamping voltage of the device. For negative duration transients, the internal steering diode is forward biased, conducting the transient current from pin 2 to 3. The transient is clamped below the rated forward voltage drop of the diode. Low capacitance protection of one high-speed line pair 2. Low capacitance protection of one differential line pair: Protection of a high-speed differential line pair is achieved by connecting two devices in antiparallel. Pin 1 of the first device is connected to line 1 and pin 2 is connected to line 2. Pin 2 of the second device is connected to line 1 and pin 1 is connected to line 2 as shown. Pin 3 must be left open on both devices. During negative duration transients, the first device will conduct from pin 2 to 1. The steering diode conducts in the forward direction while the TVS will avalanche and conduct in the reverse direction. During positive transients, the second device will conduct in the same manner. In this configuration, the total loading capacitance is the sum of the capacitance (between pins 1 and 2) of each device making this configuration suitable for high-speed interfaces. © 2011 Semtech Corp. 6 www.semtech.com SLVU2.8Q PROTECTION PRODUCTS Analog Video Input Protection Input Voltage The SLVU2.8Q can be used in conjunction with a PTC thermistor to protect analog video inputs as shown below. During an overcurrent condition, the PTC will heat up and reduce the current to the load to a low level, protecting downstream components. The reaction time of the PTC depends on several factors that are not very well controlled. This means that protected components can potentially be exposed to damaging overcurrent until there is enough power dissipation to trigger the PTC. The SLVU2.8Q will protect the down stream device until the PTC triggers. The figure at the right shows the typical response of the protection circuit to an overvoltage event. In addition to protecting the circuit until the PTC triggers, the SLVU2.8Q serves to protect components during ESD events. The SLVU2.8Q is capable of withstanding a +/-25kV contact discharge per IEC 61000-4-2. L1 Current through SLVU2.8Q Output Voltage Protection circuit response to an overvoltage event L2 . VIDEO IN/OUT VIDEO ENCODER or DRIVER SLVU2.8Q C1 C2 C3 Analog Video Protection Circuit © 2011 Semtech Corp. 7 www.semtech.com SLVU2.8Q PROTECTION PRODUCTS Outline Drawing Drawing -SOT23 - SO-8 3L Outline D A DIM e1 A A1 A2 b c D E E1 e e1 L L1 N 0 aaa bbb H 3 B E1 GAUGE PLANE SEATING PLANE E 0 c 0.25 C L L1 DETAIL A 1 2 bxN bbb e A2 A DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX .035 .000 .035 .012 .003 .110 .082 .047 .015 0° .037 .114 .093 .051 .075 .037 .020 .022 3 .004 .008 .044 .004 .040 .020 .007 .120 .104 .055 .024 8° 1.12 0.89 0.01 0.10 0.88 0.95 1.02 0.30 0.51 0.08 0.18 2.80 2.90 3.04 2.10 2.37 2.64 1.20 1.30 1.40 1.90 BSC 0.95 BSC 0.40 0.50 0.60 (0.55) 3 0° 8° 0.10 0.20 C A B 3X aaa C SEE DETAIL A SIDE VIEW SEATING PLANE A1 C NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H- 3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. Land Pattern -SOT23 3L X Y DIM Z G Y C C E E1 G X Y Z DIMENSIONS INCHES MILLIMETERS (.087) .037 .075 .031 .039 .055 .141 (2.20) 0.95 1.90 0.80 1.00 1.40 3.60 E E1 NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. REFERENCE IPC-SM-782A. © 2011 Semtech Corp. 8 www.semtech.com SLVU2.8Q PROTECTION PRODUCTS Marking Codes U2.8 YW Ordering Information Part Number Qty per R eel R eel Size SLVU2.8Q.TCT 3,000 7 Inch YW = 2 - Alphanumeric characters for Date Code Tape and Reel Specification U2.8 U2.8 U2.8 Pin 1 Location User Direction of feed A0 3.23 +/-0.05 mm B0 K0 3.17 +/-0.05 mm Tape Width B, (Max) D 8 mm 4.2 mm (.165) 1.5 + 0.1 mm - 0.0 mm 1.37 +/-0.05 mm D1 E 1.0 mm ±0.05 1.750±.10 mm F K (MAX) P P0 P2 T(MAX) 3.5±0.05 mm 2.4 mm 4.0±0.1 mm 4.0±0.1 mm 2.0±0.05 mm 0.4 mm W 8.0 mm + 0.3 mm - 0.1 mm Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 © 2011 Semtech Corp. 9 www.semtech.com