Bulletin PD-20707 rev. D 11/04
21DQ04
SCHOTTKY RECTIFIER
2 Amp
Major Ratings and Characteristics
Description/Features
Characteristics
Values
Units
IF(AV) Rectangular
2
A
VRRM
40
V
0.5
V
- 40 to 150
°C
waveform
VF
@ 2 Apk, TJ = 125°C
TJ
range
The 21DQ04 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
Lead-Free plating
CASE STYLE AND DIMENSIONS
Conform to JEDEC Outline DO-204AL (DO-41)
Dimensions in millimeters and inches
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21DQ04
Bulletin PD-20707 rev. D 11/04
Voltage Ratings
Part number
VR
21DQ04
Max. DC Reverse Voltage (V)
40
V RWM Max. Working Peak Reverse Voltage (V)
Absolute Maximum Ratings
Parameters
21DQ04
Units
2
A
50% duty cycle @ TC = 112°C, rectangular wave form
A
5µs Sine or 3µs Rect. pulse
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated VRRM applied
IF(AV) Max. Average Forward Current
Conditions
* See Fig. 4
IFSM
Max. Peak One Cycle Non-Repetitive
420
Surge Current * See Fig. 6
70
EAS
Non-Repetitive Avalanche Energy
5.0
mJ
IAR
Repetitive Avalanche Current
1.0
A
TJ = 25 °C, IAS = 1.0 Amps, L = 10 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by TJ max. VA = 1.5 x VR typical
Electrical Specifications
21DQ04
Parameters
VFM
IRM
Max. Forward Voltage Drop
(1)
Max. Reverse Leakage Current
Units
Conditions
Typ.
Max.
0.49
0.60
0.42
0.55
0.65
0.5
V
V
V
@ 2A
@ 4A
@ 2A
0.56
0.62
V
@ 4A
0.01
0.50
mA
TJ = 25 °C
5.2
10
mA
TJ = 125 °C
(1)
TJ = 25 °C
TJ = 125 °C
VR = rated VR
CT
Typical Junction Capacitance
130
pF
VR = 5VDC(test signal range 100Khz to 1Mhz) 25°C
LS
Typical Series Inductance
8.0
nH
Measured lead to lead 5mm from package body
(1) Pulse Width < 300µs, Duty Cycle <2%
Thermal-Mechanical Specifications
Parameters
21DQ04 Units
TJ
Max. Junction Temperature Range (*)
-40 to 150
Tstg
Max. Storage Temperature Range
-40 to 150
Conditions
°C
°C
RthJA Max. Thermal Resistance Junction
to Ambient
100
°C/W DC operation
Without cooling fin
RthJL Typical Thermal Resistance Junction
to Lead
25
°C/W DC Operation (* See Fig. 4)
wt
Approximate Weight
0.33(0.012) g (oz.)
Case Style
DO-204AL(DO-41)
(*) dPtot
dTj
2
<
1
Rth( j-a)
thermal runaway condition for a diode on its own heatsink
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21DQ04
Bulletin PD-20707 rev. D 11/04
100
Reverse Current - IR (mA)
10
TJ = 150°C
10
125°C
1
100°C
75°C
0.1
50°C
0.01
25°C
0.0001
0
T = 150°C
20
30
40
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
J
1
10
Reverse Voltage - VR (V)
J
T = 125°C
TJ = 25°C
1000
0.1
0
0.3
0.6
0.9
1.2
Forward Voltage Drop - V FM (V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
Junction Capacitance - C T (pF)
Instanta neous Forward Current - IF (A)
0.001
TJ = 25°C
100
10
0
10
20
30
40
Reverse Voltage - VR (V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
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21DQ04
Bulletin PD-20707 rev. D 11/04
2
DC
Average Power Loss - (Watts)
Allowa ble Lead Temperature - (°C)
150
120
90
Square wave (D = 0.50)
80% Rated V R applied
60
30
= 1/8 inch
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
1.6
1.2
DC
RMSLimit
0.8
0.4
see note (2)
0
0
1
2
0
3
0
Average Forward Current - I F(AV) (A)
Fig. 4 - Maximum Allowable Lead Temperature
Vs. Average Forward Current
Non-Rep etitive Surge Current - I FSM (A)
1
2
3
Average Forward Current - I F(AV) (A)
Fig. 5 - Forward Power Loss Characteristics
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
(2) Formula used: TL = TJ - (Pd + PdREV) x RthJL ;
Pd = Forward Power Loss = I F(AV) x VFM @ (IF(AV) / D) (see Fig. 5);
Pd REV = Inverse Power Loss = VR1 x IR (1 - D); IR @ VR1 = 80% rated VR
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21DQ04
Bulletin PD-20707 rev. D 11/04
Ordering Information Table
Device Code
21
D
Q
04
TR
1
2
3
4
5
1
-
21 = 2.1A (Axial and small packages - Current is x10)
2
-
D = DO-41 package
3
-
Q = Schottky Q.. Series
4
-
04 = Voltage Rating : 40V
5
-
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
Visit us at www.irf.com for sales contact information. 11/04
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