SM5A27

NEW PRODUCT NEW PRODUCT NEW PRODUCT SM5A27 TRANSIENT SUPPRESSOR SURFACE MOUNT AUTOMOTIVE TRANSIENT VOLTAGE SUPPRESSOR Zener Voltage - 27.0 Volts * ED DO-218 0.628(16.0) 0.592(15.0) 0.539(13.7) 0.524(13.3) Peak Pulse Current - 70.0 Amps FEATURES ¨ Ideally suited for load dump protection ¨ Plastic package has Underwriters Laboratory Flammability Classification 94V-0 ¨ High temperature stability due to unique oxide passivation ¨ Exclusive patented PARª oxide passivated chip construction ¨ Integrally molded heatsink provides a very low thermal resistance for maximum heat dissipation ¨ Low leakage current at TJ=175¡C ¨ Low forward voltage drop ¨ High temperature soldering guaranteed: 260¡C for 10 seconds at terminals T PA EN T 0.116(3.0) 0.093(2.4) 0.413(10.5) 0.342(8.7) 0.374(9.5) 0.327(8.3) 0.366(9.3) 0.343(8.7) 0.406(10.3) 0.382(9.7) LEAD 1 0.197(5.0) 0.185(4.7) 0.028(0.7) 0.020(0.5) 0.098(2.5) 0.059(1.5) 0.138(3.5) 0.098(2.5) MECHANICAL DATA Case: Molded plastic body, surface mount with heatsink integrally mounted in the encapsulation Terminals: Plated, solderable per MIL-STD-750, Method 2026 Polarity: Heatsink is anode Mounting Position: Any Weight: 0.091 ounce, 2.58 grams 0.028(0.7) 0.012(0.3) LEAD 2/METAL HEATSINK *Patent #Õs, 4,980,315, 5,166,769, 5,278,095 Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25¡C ambient temperature unless otherwise specified. SYMBOLS SM5A27 UNITS Steady state power dissipation Non-repetitive peak reverse surge current for 10ms/10ms exponentially decaying waveform Maximum working peak stand-off voltage Minimum reverse zener voltage at 10mA Maximum reverse zener voltage at 10mA Maximum zener voltage temperature coefficient at IZ=10mA Peak forward surge current, 8.3ms single half sine-wave Maximum clamping voltage for 10ms/10ms exponentially decaying waveform at IPP=55A Maximum instantaneous forward voltage at 6.0A (NOTE 1) Maximum reverse leakage current at rated VWM Maximum thermal resistance junction to case Operating junction and storage temperature range NOTE: (1) Measured on a 300ms square pulse width NOTICE: Advanced product information is subject to change without notice PD IRSM VWM VZ VZ VZTC IFSM VC VF IR RQJC TJ, TSTG 5.0 70.0 22.0 24.0 30.0 36.0 500.0 40.0 1.0 0.2 10.0 1.0 -55 to +175 Watts Amps Volts Volts Volts mV/¡C Amps Volts Volts mA ¡C/W ¡C TJ=25¡C TJ=175¡C 2/23/99 RATINGS AND CHARACTERISTIC CURVES SM5A27 FIG. 1 - POWER DERATING CURVE INSTANTANEOUS FORWARD CURRENT, AMPS FIG. 2 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 8.0 POWER DISSIPATION, WATTS 100 175¡C 25¡C 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 0 25 50 75 100 125 150 CASE TEMPERATURE, ¡C FIG. 3 - PULSE WAVEFORM 10 1 0.1 175 200 0.01 0.35 0.45 0.55 0.65 0.75 0.85 0.95 FORWARD VOLTAGE, VOLTS FIG. 4 - REVERSE POWER CAPABILITY 10,000 REVERSE SURGE POWER, WATTS 150 INPUT PEAK PULSE CURRENT % TA=25¡C PULSE WIDTH (td) is DEFINED as the POINT WHERE the PEAK CURRENT DECAYS to 50% of IPP tr=10ms 100 PEAK VALUE IPP 50 HALF VALUE - IPP 2 0 td 0 5 10 15 20 25 t, TIME, ms 30 35 40 1,000 100 10 PULSE WIDTH (ms) - 1/2 IPP EXPONENTIAL WAVEFORM FIG. 6 - TYPICAL REVERSE CHARACTERISTICS FIG. 5 - LOAD DUMP POWER CHARACTERISTICS (10ms EXPONENTIAL WAVEFORM) 3,000 2,500 2,000 1,500 1,000 500 0 25 50 150 125 100 75 CASE TEMPERATURE, ¡C 175 INSTANTANEOUS REVERS CURRENT, MICRO AMPERES LOAD DUMP POWER, WATTS 100 10 1 0.1 0.01 25¡C 175¡C 0.001 0.0001 5 20 65 50 35 PERCENTAGE OF V(BR), % 80 95 FIG. 7 - TYPICAL TRANSIENT THERMAL IMPEDANCE TRANSIENT THERMAL IMPEDANCE, ¡C/W 100 RQJA 10 1 RQJC 0.1 0.01 0.01 0.1 1 PULSE WIDTH, sec. 10 100