PD-2.305 rev. A 12/97 31DQ05 31DQ06 SCHOTTKY RECTIFIER 3.3 Amp Major Ratings and Characteristics Description/Features Characteristics 31DQ.. Units I F(AV) Rectangular waveform 3.3 A 50/60 V I FSM @ tp = 5 s sine 360 A VF 0.58 V - 40 to 125 C VRRM @ 3 Apk, TJ = 25C TJ The 31DQ.. axial leaded Schottky rectifier has been optimized for very low forward voltage drop, with moderate leakage. Typical applications are in switching power supplies, converters, free-wheeling diodes, and reverse battery protection. Low profile, axial leaded outline High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance Very low forward voltage drop High frequency operation Guard ring for enhanced ruggedness and long term reliability CASE STYLE AND DIMENSIONS Outline C - 16 Dimensions in millimeters and inches www.irf.com 1 31DQ05, 31DQ06 PD-2.305 rev. A 12/97 Voltage Ratings Part number VR 31DQ05 31DQ06 50 60 Max. DC Reverse Voltage (V) VRWM Max. Working Peak Reverse Voltage (V) Absolute Maximum Ratings Parameters 31DQ.. Units IF(AV) Max. Average Forward Current 3.3 A * See Fig. 4 IFSM Conditions 50% duty cycle @ TA = 19 C, rectangular wave form With cooling fins Max. Peak One Cycle Non-Repetitive 360 Surge Current * See Fig. 6 60 A Following any rated load condition and with rated VRRM applied 10ms Sine or 6ms Rect. pulse 5s Sine or 3s Rect. pulse Electrical Specifications Parameters VFM IRM 31DQ.. Units Max. Forward Voltage Drop * See Fig. 1 (1) Conditions 0.58 0.75 0.53 V V V @ 3A @ 6A @ 3A 0.64 V @ 6A TJ = 25 C TJ = 125 C Max. Reverse Leakage Current 3 mA TJ = 25 C * See Fig. 2 30 mA TJ = 125 C (1) VR = rated VR CT Typical Junction Capacitance 160 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25C LS Typical Series Inductance 9.0 nH Measured lead to lead 5mm from package body (1) Pulse Width < 300s, Duty Cycle <2% Thermal-Mechanical Specifications Parameters 31DQ.. Units TJ Max. Junction Temperature Range -40 to 125 Tstg Max. Storage Temperature Range -40 to 125 Conditions C C RthJA Max. Thermal Resistance Junction to Ambient 80 C/W DCoperation Without cooling fins RthJA Typical Thermal Resistance Junction to Ambient 34 C/W With fin 20 x 20 (0.79 x 0.79) 1.0 (0.04) thick. Dimensions in millimeters (inches) wt Approximate Weight Case Style 2 1.2 (0.042) g (oz.) C - 16 www.irf.com 31DQ05, 31DQ06 PD-2.305 rev. A 12/97 10 ReverseCurrent - I (mA) R T =125C J 10 1 100C 75C .1 50C .01 .001 0 10 20 30 40 50 60 ReverseVoltage- VR (V) Fig. 2 - Typical Values of Reverse Current Vs. Reverse Voltage 1 T =125C J T = 25C J 1000 .1 0 .2 .4 .6 .8 1 ForwardVoltage Drop- V (V) FM Fig. 1 - Maximum Forward Voltage Drop Characteristics JunctionCapacitance- C (pF) T Instantaneous ForwardCurrent - I (A) F 25C T =25C J 100 10 0 5 10 15 20 2530 35 40 45 5055 60 65 ReverseVoltage- V (V) R Fig. 3 - Typical Junction Capacitance Vs. Reverse Voltage www.irf.com 3 31DQ05, 31DQ06 PD-2.305 rev. A 12/97 3 RthJA(DC) =34C/W 120 AveragePower Loss- (W atts) Allowable CaseTemperature- (C) 140 100 80 DC 60 40 Copper 5.0(0.2) D=0.08 2.5 D=0.17 D=0.25 D=0.33 2 D=0.50 1.5 RMSLimit DC 1 .5 PCBoardMounted 20 0 1 2 3 4 0 0 5 1 2 3 4 5 AverageForwardCurrent - I (A) F(AV) Average ForwardCurrent - IF(AV) (A) Fig. 4 - Maximum Allowable Case Temperature Vs. Average Forward Current, With Fins Fig. 5 - Forward Power Loss Characteristics Non-Repetitive Surge Current - I FSM (A) 1000 100 At Any Rated Load Condition And With Rated VRRM Applied Following Surge 10 10 100 1000 10000 Square Wave Pulse Duration - t p (microsec) Fig. 6 - Maximum Non-Repetitive Surge Current 4 www.irf.com