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| Low Voltage ClampTM for ESD and CDE Protection PROTECTION PRODUCTS - MicroClampTM Description The Clamp series of Transient Voltage Suppressors (TVS) are designed to replace multilayer varistors (MLVs) in portable applications where low operating voltage is vital. They offer superior electrical characteristics such as lower clamping voltage and no device degradation when compared to MLVs. They are designed to protect sensitive semiconductor components from damage or upset due to electrostatic discharge (ESD), lightning, electrical fast transients (EFT), and cable discharge events (CDE). The ClampTM3311P is constructed using Semtech's proprietary EPD process technology. The EPD process provides low standoff voltages with significant reductions in leakage currents and capacitance over siliconavalanche diode processes. They feature a true operating voltage of 3.3 volts for superior protection when compared to traditional pn junction devices. The ClampTM3311P is in an 2-pin, RoHS/WEEE compliant, SLP1006P2 package. It measures 1.0 x 0.6 x 0.5mm. The leads are spaced at a pitch of 0.65mm and are finished with lead-free NiPdAu. Each device will protect one line operating at 3.3 volts. It gives the designer the flexibility to protect single lines in applications where arrays are not practical. They may be used to meet the ESD immunity requirements of IEC 610004-2, Level 4 (15kV air, 8kV contact discharge). The combination of small size and high ESD surge capability makes them ideal for use in portable applications such as cellular phones, digital cameras, and MP3 players. TM UCLAMP3311P Features Transient protection for data lines to IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-4 (EFT) 40A (tp = 5/50ns) Cable Discharge Event (CDE) Ultra-small package (1.0 x 0.6 x 0.5mm) Protects one data line Low clamping voltage Working voltage: 3.3V Low leakage current Solid-state silicon-avalanche technology Mechanical Characteristics SLP1006P2 package RoHS/WEEE Compliant Nominal Dimensions: 1.0 x 0.6 x 0.5 mm Lead Finish: NiPdAu Molding compound flammability rating: UL 94V-0 Marking : Marking code, cathode band Packaging : Tape and Reel Applications Cellular Handsets & Accessories Notebooks & Handhelds Portable Instrumentation Digital Cameras Peripherals MP3 Players Dimensions 1.0 0.60 0.65 Schematic & PIN Configuration 0.50 Maximum Dimensions (mm) Revision 08/22/2007 1 SLP1006P2 (Bottom View) www.semtech.com UCLAMP3311P PROTECTION PRODUCTS Absolute Maximum Rating R ating Peak Pulse Power (tp = 8/20s) Maximum Peak Pulse Current (tp = 8/20s) ESD p er IEC 61000-4-2 (Air) ESD p er IEC 61000-4-2 (Contact) Op erating Temp erature Storage Temp erature Symbol Pp k Ip p V PP TJ TSTG Value 90 5 +/- 25 +/- 20 -40 to +85 -55 to +150 Units Watts Amps kV C C Electrical Characteristics (T=25oC) Parameter Reverse Stand-Of f Voltage Punch-Through Voltage Snap-Back Voltage Reverse Leakage Current Clamping Voltage Clamping Voltage Junction Capacitance Symbol VRWM VPT VSB IR VC VC Cj IPT = 2A ISB = 50mA VRWM = 3.3V IPP = 1A, tp = 8/20s IPP = 5A, tp = 8/20s I/O pin to Gnd VR = 0V, f = 1MHz I/O pin to Gnd VR = 3.3V, f = 1MHz 12 3.5 2.8 0.05 0.5 8 18 15 Conditions Minimum Typical Maximum 3.3 Units V V V A V V pF 10 pF (c) 2007 Semtech Corp. 2 www.semtech.com UCLAMP3311P PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time 10 Power Derating Curve 110 100 90 % of Rated Power or I PP 80 70 60 50 40 30 20 10 0 Peak Pulse Power - PPP (kW) 1 0.1 0.01 0.1 1 10 Pulse Duration - tp (us) 100 1000 0 25 50 75 100 125 150 Ambient Temperature - TA (oC) Clamping Voltage vs. Peak Pulse Current 20 18 Clamping Voltage - VC (V) 16 14 12 10 8 6 4 2 0 0 1 2 3 4 5 6 Waveform Parameters: tr = 8s td = 20s Junction Capacitance vs. Reverse Voltage 1.4 1.2 CJ(VR) / CJ(VR=0) 1 0.8 0.6 0.4 0.2 0 0 0.5 1 1.5 2 2.5 f = 1 MHz 3 3.5 Peak Pulse Current - IPP (A) Reverse Voltage - VR (V) Insertion Loss S21 CH1 S21 LOG 6 dB / REF 0 dB 1: -3.0120 dB 616.229 MHz 0 dB -6 dB -12 dB -18 dB -24 dB -30 dB -36 dB 1 2 3 4 2: -3.8355 dB 900 MHz 3: -5.9804 dB 1.8 GHz 4: -8.1629 dB 2.5 GHz 1 MHz START. 030 MHz 10 MHz 100 MHz 3 1 GHz GHz . STOP 3000 000000 MHz (c) 2007 Semtech Corp. 3 www.semtech.com UCLAMP3311P PROTECTION PRODUCTS Applications Information Device Connection Options The Clamp3311P is designed to protect one data line operating up to 3.3 volts. It will present a high impedance to the protected line up to 3.3 volts. It will "turn on" when the line voltage exceeds 3.5 volts. The device is bidirectional and may be used on lines where the signal polarity is above and below ground. These devices are not recommended for use on dc power supply lines due to their snap-back voltage characteristic. EPD TVS Characteristics These devices are constructed using Semtech's proprietary EPD technology. The structure of the EPD TVS is vastly different from the traditional pn-junction devices. At voltages below 5V, high leakage current and junction capacitance render conventional avalanche technology impractical for most applications. However, by utilizing the EPD technology, these devices can effectively operate at 3.3V while maintaining excellent electrical characteristics. The EPD TVS employs a complex nppn structure in contrast to the pn structure normally found in traditional silicon-avalanche TVS diodes. The EPD mechanism is achieved by engineering the center region of the device such that the reverse biased junction does not avalanche, but will "punch-through" to a conducting state. This structure results in a device with superior DC electrical parameters at low voltages while maintaining the capability to absorb high transient currents. Circuit Board Layout Recommendations for Suppression of ESD. Good circuit board layout is critical for the suppression of ESD induced transients. The following guidelines are recommended: Place the TVS near the input terminals or connectors to restrict transient coupling. Minimize the path length between the TVS and the protected line. Minimize all conductive loops including power and ground loops. The ESD transient return path to ground should be kept as short as possible. Never run critical signals near board edges. Use ground planes whenever possible. (c) 2007 Semtech Corp. 4 www.semtech.com Device Schematic & Pin Configuration EPD TVS IV Characteristic Curve IPP ISB IPT VF IR VRWM V VPT VC SB IF UCLAMP3311P PROTECTION PRODUCTS Applications Information - Spice Model Figure 1 - UCLAMP3311P Spice Model Table 1 - UCLAMP3311P Spice Parameters Parameter IS BV VJ RS IB V CJO TT M N EG Unit Amp Volt Volt Ohm Amp Farad sec --eV D1 (T VS) 1E-20 3.8 0.7 1.1 1E-3 20E-12 2.541E-9 0.214 1.1 1.11 D2 (T VS) 1E-20 3.8 0.7 1.1 1E-3 20E-12 2.541E-9 0.214 1.1 1.11 (c) 2007 Semtech Corp. 5 www.semtech.com UCLAMP3311P PROTECTION PRODUCTS Outline Drawing - SLP1006P2 A D B E DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX A A1 b D E e L R N aaa bbb .016 .020 .022 .000 .001 .002 .018 .020 .022 .035 .039 .043 .020 .024 .028 .026 BSC .008 .010 .012 .002 .004 .006 2 .003 .004 0.40 0.50 0.55 0.00 0.03 0.05 0.45 0.50 0.55 0.90 1.00 1.10 0.50 0.60 0.70 0.65 BSC 0.20 0.25 0.30 0.05 0.10 0.15 2 0.08 0.10 TOP VIEW A aaa C A1 PIN 1 ID R bxN bbb CAB 2x L e C SEATING PLANE BOTTOM VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). Land Pattern - SLP1006P2 Y (C) G Z DIMENSIONS DIM C G X Y Z INCHES (.033) .012 .024 .022 .055 MILLIMETERS (0.85) 0.30 0.60 0.55 1.40 X NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. (c) 2007 Semtech Corp. 6 www.semtech.com UCLAMP3311P PROTECTION PRODUCTS Marking Code Ordering Information Part Number Working Voltage 3 .3 V Qty per Reel 3 ,0 0 0 Reel Size 7 Inch X PIN 1 ID Tape and Reel Specification UCLAMP3311P.TCT Notes: 1) This is a lead-free, RoHS/WEEE compliant product MicroClamp, uClamp and Clamp are marks of Semtech Corporation A0 0.69 +/-0.10 mm B0 1.19 +/-0.10 mm K0 0.66 +/-0.10 mm Tape Width B, (Max) D 1.5 + 0.1 mm - 0.0 mm (0.59 +.005 - .000) D1 E 1.750.10 mm (.069.004) F P 4.00.10 mm (.157.004) P0 4.00.1 mm (.157.004) P2 T W 8.0 mm + 0.3 mm - 0.1 mm (.312.012) 8 mm 4.2 mm (.165) 0.4 mm 0.25 (.031) 3.50.05 mm (.138.002) 2.00.05 mm (.079.002) 0.2540.02 mm (.016) Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 www.semtech.com (c) 2007 Semtech Corp. 7 |
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