LL4148 / LL4448 SMALL SIGNAL SWITCHING DIODE FEATURES MINI MELF (LL-34) Silicon epitaxial planar diode ● Fast switching diodes ● 500mw power dissipation ● High temperature soldering guaranteed 250℃/10S at terminals ● 0.063(1.6) 0.055(1.4) DIA. MECHANICAL DATA Case: MINI MELF glass sealed envelope. Terminals: Plated axial leads, solderable per MIL-STD-750, Method 2026 Polarity: Color band denotes cathode end Mounting Position: Any Weight:0.002 ounce, 0.05 grams Maximum Ratings ( 0.020(0.5) 0.012(0.3) 0.020(0.5) 0.012(0.3) 0.146(3.7) 0.130(3.3) Dimensions in inches and (millimeters) TA=25 C Unless otherwise noted) Symbol Characteristic LL4148 / LL4448 Unit Non-Repetitive Peak Voltage VRM 100 V Peak Repetitive Reverse Voltage Working Peak Reverse Voltage DC Blocking Voltage VPWM VRWM VR 75 V IO 150 mA IFSM 2.0 A Pd 500 mW RθJA 300 K/W TJ,TSTG -65 to +175 C Average Rectified Output Current (1) Non-Repetitive Peak Forward Surge Current @t=1.0us Power Dissipation Thermal Resistance Junction to Ambient Operating and Strorage Temperature Range Electrical Characteristics ( TA=25 C Unless otherwise noted) Symbol Min V(BR)R 100 Forward Voltage IF=10 mA LL4148 LL4448 IF=5 mA IF=100 mA VF 0.62 1.0 0.72 1.0 Leakage Current VR =20V VR =75V VR =75V, Tj=150 C IR - 25 5 50 Junction Capacitance Cj - 4 PF Reverse Recovery Time IF=10 mA, IR=1mA, VR =6V, RL=100Ω TRR - 4 nS Characteristic Reverse Breakdown Voltage IR = 100ua Note: 1.Valid Provided that device Terminals are Kept at Ambient Temperature. Max - Unit V V µA LL4148 / LL4448 FIG. 2-REVERSE CURRENT VERSUS CONTINUOUS REVERSE VOLTAGE (TYPICAL VALUES) FIG. 1-ADMISSIBLE POWER DISSIPATION VERSUS AMBIENT TEMPERATURE 800 INSTANTANEOUS REVERSE CURRENT, MICROAMPERES P,POWER DISSIPATION,MILLIWATTS RATINGS AND CHARACTERISTIC CURVES 700 600 500 400 300 200 100 0 0 100 200℃ AMBIENT TEMPERATURE,℃ 1 0.1 0.01 TJ=25 C 0.001 0.0001 40 60 80 100 120 PERCENT OF PEAK REVERSE VOLTAGE,% FIG. 3-FORWARD CHARACTERISTICS FIG. 4-RELATIVE CAPACTANCE VERSUS REVERSE VOLTAGE Ctot(vR) RELATIVE CAPACTANCE Ctot(0v) 14 12 10 8 6 4 2 0 0 1 2V INSTANTANEOUS FORWARD VOLEAGE, V0LTS 1.2 1.0 0.8 0.6 0.4 0 5 10V REVERSE VOLTAGE,VOLTS. FIG. 5-ADMISSIBLE REPETITIVE PEAK FORWARD CURRENT VERSUS PULSE DURATION IFRM,PEAK FORWARD CURRENT,AMPERES INSTANTANEOUS FORWARD CURRENT,MILLIAMPERES 16 100 n=tp/T V=tp/T T=1/fp tp 10 IFRM n=0 0.1 T 0.2 1 0.5 0.1 0.01 0.1 1 tp,PULSE DURATION,ms 10 100 1000ms