Bulletin PD-20707 rev. D 11/04
21DQ04
SCHOTTKY RECTIFIER
2 Amp
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
V
F
T
J
@ 2 Apk, T
J
= 125°C
range
Description/Features
Units
A
V
V
°C
The 21DQ04 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
Lead-Free plating
Values
2
40
0.5
- 40 to 150
CASE STYLE AND DIMENSIONS
Conform to JEDEC Outline DO-204AL (DO-41)
Dimensions in millimeters and inches
Document Number: 93279
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21DQ04
Bulletin PD-20707 rev. D 11/04
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
21DQ04
40
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
* See Fig. 4
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current * See Fig. 6
Non-Repetitive Avalanche Energy
Repetitive Avalanche Current
420
70
5.0
1.0
A
mJ
A
5µs Sine or 3µs Rect. pulse
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
21DQ04
2
Units
A
Conditions
50% duty cycle @ T
C
= 112°C, rectangular wave form
T
J
= 25 °C, I
AS
= 1.0 Amps, L = 10 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(1)
21DQ04
Typ.
0.49
0.60
0.42
0.56
0.01
5.2
130
8.0
Max.
0.55
0.65
0.5
0.62
0.50
10
Units
V
V
V
V
mA
mA
pF
nH
@ 2A
@ 4A
@ 2A
@ 4A
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
C
T
L
S
Max. Reverse Leakage Current
(1)
Typical Junction Capacitance
Typical Series Inductance
T
J
= 25 °C
T
J
= 125 °C
V
R
= 5V
DC
(test signal range 100Khz to 1Mhz) 25°C
Measured lead to lead 5mm from package body
(1) Pulse Width < 300µs, Duty Cycle <2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range (*)
Max. Storage Temperature Range
21DQ04 Units
-40 to 150
-40 to 150
100
25
°C
°C
Conditions
R
thJA
Max. Thermal Resistance Junction
to Ambient
R
thJL
Typical Thermal Resistance Junction
to Lead
wt
Approximate Weight
Case Style
(*) dPtot
dTj
<
1
Rth( j-a)
°C/W DC operation
Without cooling fin
°C/W DC Operation (* See Fig. 4)
0.33(0.012) g (oz.)
DO-204AL(DO-41)
thermal runaway condition for a diode on its own heatsink
Document Number: 93279
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2
21DQ04
Bulletin PD-20707 rev. D 11/04
100
10
Reverse Current - I
R
(mA)
10
1
0.1
0.01
T
J
= 150°C
125°C
100°C
75°C
50°C
25°C
0.001
Instanta neous Forward Current - I
F
(A)
0.0001
T = 150°C
J
J
0
10
20
30
40
R
everse Voltage - V
R
(V)
T = 125°C
1
T
J
= 25°C
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
1000
Junction Capacitance - C
T
(pF)
T
J
= 25°C
100
0.1
0
0.3
0.6
0.9
1.2
Forward Voltage Drop - V
FM
(V)
10
0
10
20
30
40
Fig. 1 - Maximum Forward Voltage Drop Characteristics
R
everse Voltage - V
R
(V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Document Number: 93279
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3
21DQ04
Bulletin PD-20707 rev. D 11/04
150
Allowa ble Lead T
emperature - (°C)
Average Power Loss - (Watts)
2
DC
120
1.6
90
S
quare wave (D = 0.50)
80% Rated V
R
applied
1.2
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
DC
60
0.8
RMSLimit
30
= 1/8 inch
see note (2)
0.4
0
0
1
2
3
0
0
1
2
3
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Fig. 4 - Maximum Allowable Lead Temperature
Vs. Average Forward Current
Fig. 5 - Forward Power Loss Characteristics
Non-R etitive Surge Current - I
FS
(A)
ep
M
1000
100
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following S
urge
10
10
100
1000
10000
S
quare Wave Pulse Duration - t p (microsec)
Fig. 6 - Maximum Non-Repetitive Surge Current
(2)
Formula used: T
L
= T
J
- (Pd + Pd
REV
) x R
thJL
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 5);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 80% rated V
R
Document Number: 93279
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4
21DQ04
Bulletin PD-20707 rev. D 11/04
Ordering Information Table
Device Code
21
1
1
2
3
4
5
-
-
-
-
-
D
2
Q
3
04
4
TR
5
21 = 2.1A (Axial and small packages - Current is x10)
D = DO-41 package
Q = Schottky Q.. Series
04 = Voltage Rating : 40V
TR = Tape & Reel package ( 5000 pcs)
TB = Tape & Box package (Ammunition -3000 pcs)
-
= Box package (1000 pcs)
Data and specifications subject to change without notice.
This product has been designed and qualified for Industrial Level and Lead-Free.
Qualification Standards can be found on IR's Web site.
IR WORLD HEADQUARTERS:
233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7309
11/04
Document Number: 93279
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