SCHOTTKY RECTIFIER 3.3 Amp
31DQ05
31DQ06
PD-2.305 rev. A 12/97
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Dimensions in millimeters and inches
Outline C - 16
CASE STYLE AND DIMENSIONS
IF(AV) Rectangular 3.3 A
waveform
VRRM 50/60 V
IFSM @ tp = 5 µs sine 360 A
VF@ 3 Apk, TJ
= 25°C 0.58 V
TJ- 40 to 125 °C
Characteristics 31DQ.. Units The 31DQ.. axial leaded Schottky rectifier has been opti-
mized for very low forward voltage drop, with moderate
leakage. Typical applications are in switching power sup-
plies, 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
Description/FeaturesMajor Ratings and Characteristics
31DQ05, 31DQ06
PD-2.305 rev. A 12/97
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Part number 31DQ05 31DQ06
VRMax. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V)
Voltage Ratings
50 60
IF(AV) Max. Average Forward Current 3.3 A 50% duty cycle @ TA = 19 °C, rectangular wave form
* See Fig. 4 With cooling fins
IFSM Max. Peak One Cycle Non-Repetitive 360 5µs Sine or 3µs Rect. pulse
Surge Current * See Fig. 6 60 10ms Sine or 6ms Rect. pulse
Absolute Maximum Ratings
Parameters 31DQ.. Units Conditions
AFollowing any rated
load condition and with
rated VRRM applied
VFM Max. Forward Voltage Drop 0.58 V @ 3A
* See Fig. 1 ( 1) 0.75 V @ 6A
0.53 V @ 3A
0.64 V @ 6A
IRM Max. Reverse Leakage Current 3 mA TJ = 25 °C
* See Fig. 2 ( 1) 3 0 m A TJ = 125 °C
CTTypical Junction Capacitance 16 0 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance 9. 0 n H Measured lead to lead 5mm from package body
TJ = 25 °C
TJ = 125 °C
VR = rated VR
Parameters 31DQ.. Units Conditions
Electrical Specifications
(1) Pulse Width < 300µs, Duty Cycle <2%
TJMax. Junction Temperature Range -40 to 125 °C
Tstg Max. Storage Temperature Range -40 to 125 °C
RthJA Max. Thermal Resistance Junction 80 °C/W DC operation
to Ambient Without cooling fins
RthJA Typical Thermal Resistance Junction 34 °C/W With fin 20 x 20 (0.79 x 0.79) 1.0 (0.04) thick.
to Ambient Dimensions in millimeters (inches)
wt Approximate Weight 1.2 (0.042) g (oz.)
Case Style C - 16
Thermal-Mechanical Specifications
Parameters 31DQ.. Units Conditions
31DQ05, 31DQ06
PD-2.305 rev. A 12/97
3
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Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
Fig. 1 - Maximum Forward Voltage Drop Characteristics
10
100
1000
0 5 10 15 20 25 30 35 40 45 50 55 60 6
5
T = 25 °C
J
Reverse Voltage - V (V)
R
T
Junction Capacitance - C (pF)
.1
1
10
0.2.4.6.81
FM
F
Instantaneous Forward C urrent - I (A)
Forward Voltage Drop - V ( V)
T = 125°C
T = 25°C
J
J
.001
.01
.1
1
10
010203040506
0
R
R
100°C
75°C
50°C
25°C
R everse Voltage - V (V )
Rev e rs e Curre nt - I (mA)
T = 125°C
J
31DQ05, 31DQ06
PD-2.305 rev. A 12/97
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Fig. 5 - Forward Power Loss CharacteristicsFig. 4 - Maximum Allowable Case Temperature
Vs. Average Forward Current, With Fins
Fig. 6 - Maximum Non-Repetitive Surge Current
0
.5
1
1.5
2
2.5
3
01234
5
DC
Average Power Loss - (Watts)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Lim it
Average Forward Current - I (A)
20
40
60
80
100
120
140
01234
5
DC
Allowable C ase T em p era ture - (°C)
Av e ra ge Fo rwa rd Cu rr e nt - I ( A)
F(AV)
PC Board M o unted
R ( DC) = 3 4 °C/W
thJA
Copper 5.0(0.2)
10
100
1000
10 100 1000 10000
FSM
p
N on-Repet iti ve Surge Current - I (A)
At Any Rated Load Condition
And With Rated V Applie d
Follo w ing Su rge
RRM
Square Wave Pu lse Duration - t (microse c)
