December 2011 Doc ID 16744 Rev 5 1/21
21
STB21N90K5, STF21N90K5
STP21N90K5, STW21N90K5
N-channel 900 V, 0.25 Ω, 18.5 A D2PAK, TO-220FP, TO-220
and TO-247 Zener-protected SuperMESH™5 Power MOSFET
Features
■TO-220 worldwide best RDS(on)
■Worldwide best FOM (figure of merit)
■Ultra low gate charge
■100% avalanche tested
■Zener-protected
Applications
■Switching applications
Description
These devices are N-channel Power MOSFETs
developed using SuperMESH™ 5 technology.
This revolutionary, avalanche-rugged, high
voltage Power MOSFET technology is based on
an innovative proprietary vertical structure. The
result is a drastic reduction in on-resistance and
ultra low gate charge for applications which
require superior power density and high
efficiency.
Figure 1. Internal schematic diagram
Order codes VDSS RDS(on)max IDPW
STB21N90K5
900 V < 0.299 Ω18.5 A
250 W
STF21N90K5 40 W
STP21N90K5 250 W
STW21N90K5
TO-220
123
TAB
12
3
12
3
TO-220FP
TO-247
1
3
TAB
D2PAK
D(2, TAB)
G(1)
S(3)
AM01476v1
Table 1. Device summary
Order codes Marking Package Packaging
STB21N90K5
21N90K5
D2PAK Tape and reel
STF21N90K5 TO-220FP
TubeSTP21N90K5 TO-220
STW21N90K5 TO-247
www.st.com
Contents STx21N90K5
2/21 Doc ID 16744 Rev 5
Contents
1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Packaging information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
STx21N90K5 Electrical ratings
Doc ID 16744 Rev 5 3/21
1 Electrical ratings
Table 2. Absolute maximum ratings
Symbol Parameter
Value
Unit
D2PAK,
TO-220, TO-247 TO-220FP
VGS Gate- source voltage ± 30V
IDDrain current (continuous) at TC = 25 °C 18.5 18.5(1)
1. Limited by package.
A
IDDrain current (continuous) at TC = 100 °C 11.6 11.6 (1) A
IDM (2)
2. Pulse width limited by safe operating area.
Drain current (pulsed) 74 74 (1) A
PTOT Total dissipation at TC = 25 °C 250 40 W
IAR
Max current during repetitive or single
pulse avalanche
(pulse width limited by Tjmax )
6A
EAS
Single pulse avalanche energy
(starting TJ = 25 °C, ID=IAR, VDD= 50 V) 200 mJ
Viso
Insulation withstand voltage (RMS) from
all three leads to external heat sink
(t=1 s;TC=25 °C)
2500 V
dv/dt (3)
3.I
SD ≤ 18.5 A, di/dt ≤ 100 A/µs, VPeak ≤ V(BR)DSS
Peak diode recovery voltage slope 6 V/ns
Tj
Tstg
Operating junction temperature
Storage temperature -55 to 150 °C
Table 3. Thermal data
Symbol Parameter
Value
Unit
D²PAK TO-220FP TO-220 TO-247
Rthj-case Thermal resistance junction-case max 0.5 3.130.5
°C/WRthj-amb Thermal resistance junction-amb max 62.5 50
Rthj-pcb Thermal resistance junction-pcb max 30
Electrical characteristics STx21N90K5
4/21 Doc ID 16744 Rev 5
2 Electrical characteristics
(TCASE = 25 °C unless otherwise specified).
Table 4. On/off states
Symbol Parameter Test conditions Min. Typ. Max. Unit
V(BR)DSS
Drain-source breakdown
voltage (VGS= 0) ID = 1 mA 900 V
IDSS
Zero gate voltage drain
current (VGS = 0)
VDS = 900 V
VDS = 900 V, Tc=125 °C
1
50
µA
µA
IGSS
Gate body leakage current
(VDS = 0) VGS = ± 20 V ±10 µA
VGS(th) Gate threshold voltage VDS = VGS, ID = 100 µA 345V
RDS(on)
Static drain-source on
resistance VGS = 10 V, ID= 9 A 0.25 0.299 Ω
Table 5. Dynamic
Symbol Parameter Test conditions Min. Typ. Max. Unit
Ciss Input capacitance
VDS =100 V, f=1 MHz, VGS=0 -
1645
-
pF
Coss Output capacitance 112 pF
Crss
Reverse transfer
capacitance 2pF
Co(tr)(1)
1. Time related is defined as a constant equivalent capacitance giving the same charging time as Coss when
VDS increases from 0 to 80% VDSS
Equivalent capacitance time
related VGS = 0, VDS = 0 to 720 V
-133 -pF
Co(er)(2)
2. Energy related is defined as a constant equivalent capacitance giving the same stored energy as Coss
when VDS increases from 0 to 80% VDSS
Equivalent capacitance
energy related -16-pF
RGIntrinsic gate resistance f = 1MHz open drain - 4 - Ω
Qg
Qgs
Qgd
Total gate charge
Gate-source charge
Gate-drain charge
VDD = 450 V, ID = 18.5 A
VGS =10 V
(see Figure 20)
-
43
12
25
-
nC
nC
nC
STx21N90K5 Electrical characteristics
Doc ID 16744 Rev 5 5/21
The built-in-back Zener diodes have specifically been designed to enhance not only the
device’s ESD capability, but also to make them safely absorb possible voltage transients that
may occasionally be applied from gate to source. In this respect the Zener voltage is
appropriate to achieve an efficient and cost-effective intervention to protect the device’s
integrity. These integrated Zener diodes thus avoid the usage of external components.
Table 6. Switching times
Symbol Parameter Test conditions Min. Typ. Max. Unit
td(on)
tr
td(off)
tf
Turn-on delay time
Rise time
Turn-off delay time
Fall time
VDD = 450 V, ID = 10 A,
RG=4.7 Ω, VGS=10 V
(see Figure 22)
-
17
27
52
40
-
ns
ns
ns
ns
Table 7. Source drain diode
Symbol Parameter Test conditions Min. Typ. Max. Unit
ISD
ISDM
Source-drain current
Source-drain current (pulsed) -19
76
A
A
VSD(1)
1. Pulsed: pulse duration = 300µs, duty cycle 1.5%
Forward on voltage ISD= 18.5 A, VGS=0 - 1.5 V
trr
Qrr
IRRM
Reverse recovery time
Reverse recovery charge
Reverse recovery current
ISD= 18.5 A, VDD= 60 V
di/dt = 100 A/µs,
(see Figure 21)
-
548
12
46
ns
μC
A
trr
Qrr
IRRM
Reverse recovery time
Reverse recovery charge
Reverse recovery current
ISD= 18.5 A,VDD= 60 V
di/dt=100 A/µs,
Tj=150 °C
(see Figure 21)
-
660
15
45
ns
μC
A
Table 8. Gate-source Zener diode
Symbol Parameter Test conditions Min Typ. Max Unit
BVGSO Gate-source breakdown voltage Igs ± 1mA, (open drain) 30- - V
Electrical characteristics STx21N90K5
6/21 Doc ID 16744 Rev 5
2.1 Electrical characteristics (curves)
Figure 2. Safe operating area for TO-220 /
D2PAK
Figure 3. Thermal impedance for TO-220 /
D2PAK
Figure 4. Safe operating area for TO-220FP Figure 5. Thermal impedance for TO-220FP
Figure 6. Safe operating area for TO-247 Figure 7. Thermal impedance for TO-247
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STx21N90K5 Electrical characteristics
Doc ID 16744 Rev 5 7/21
Figure 8. Output characteristics Figure 9. Transfer characteristics
Figure 10. Gate charge vs gate-source voltage Figure 11. Static drain-source on resistance
Figure 12. Capacitance variations Figure 13. Output capacitance stored energy
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Electrical characteristics STx21N90K5
8/21 Doc ID 16744 Rev 5
Figure 14. Normalized gate threshold voltage
vs temperature
Figure 15. Normalized on resistance vs
temperature
Figure 16. Source-drain diode forward
characteristics
Figure 17. Normalized BVDSS vs temperature
Figure 18. Maximum avalanche energy vs
starting Tj
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E
AS
040 T
J
(°C)
(mJ)
20 100
60 80
0
20
40
60
80
120 140
100
120
140
160
180
200
I
D
=6 A
V
DD
=50 V
AM11194v1
STx21N90K5 Test circuits
Doc ID 16744 Rev 5 9/21
3 Test circuits
Figure 19. Switching times test circuit for
resistive load
Figure 20. Gate charge test circuit
Figure 21. Test circuit for inductive load
switching and diode recovery times
Figure 22. Unclamped inductive load test
circuit
Figure 23. Unclamped inductive waveform Figure 24. Switching time waveform
AM01468v1
VGS
PW
VD
RG
RL
D.U.T.
2200
μF
3.3
μFVDD
AM01469v1
VDD
47kΩ1kΩ
47kΩ
2.7kΩ
1kΩ
12V
Vi=20V=VGMAX
2200
μF
PW
IG=CONST
100Ω
100nF
D.U.T.
VG
AM01470v1
A
D
D.U.T.
S
B
G
25 Ω
AA
BB
RG
G
FAST
DIODE
D
S
L=100μH
μF
3.3 1000
μFVDD
AM01471v1
Vi
Pw
VD
ID
D.U.T.
L
2200
μF
3.3
μFVDD
AM01472v1
V(BR)DSS
VDD
VDD
VD
IDM
ID
AM01473v1
VDS
ton
tdon tdoff
toff
tf
tr
90%
10%
10%
0
0
90%
90%
10%
VGS
Package mechanical data STx21N90K5
10/21 Doc ID 16744 Rev 5
4 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
STx21N90K5 Package mechanical data
Doc ID 16744 Rev 5 11/21
Table 9. D²PAK (TO-263) mechanical data
Dim.
mm
Min. Typ. Max.
A4.40 4.60
A1 0.030.23
b0.70 0.93
b2 1.14 1.70
c0.45 0.60
c2 1.231.36
D8.95 9.35
D1 7.50
E 10 10.40
E1 8.50
e2.54
e1 4.88 5.28
H 15 15.85
J1 2.49 2.69
L2.29 2.79
L1 1.27 1.40
L2 1.301.75
R0.4
V2 0° 8°
Package mechanical data STx21N90K5
12/21 Doc ID 16744 Rev 5
Figure 25. D²PAK (TO-263) drawing
Figure 26. D²PAK footprint(a)
a. All dimension are in millimeters
STx21N90K5 Package mechanical data
Doc ID 16744 Rev 5 13/21
Table 10. TO-220 type A mechanical data
Dim.
mm
Min. Typ. Max.
A4.40 4.60
b0.61 0.88
b1 1.14 1.70
c0.48 0.70
D 15.25 15.75
D1 1.27
E 10 10.40
e2.40 2.70
e1 4.95 5.15
F1.231.32
H1 6.20 6.60
J1 2.40 2.72
L1314
L1 3.50 3.93
L20 16.40
L30 28.90
∅P3.75 3.85
Q2.65 2.95
Package mechanical data STx21N90K5
14/21 Doc ID 16744 Rev 5
Figure 27. TO-220 type A drawing
STx21N90K5 Package mechanical data
Doc ID 16744 Rev 5 15/21
Figure 28. TO-220FP drawing
Table 11. TO-220FP mechanical data
Dim.
mm
Min. Typ. Max.
A4.4 4.6
B2.5 2.7
D2.5 2.75
E 0.45 0.7
F0.75 1
F1 1.15 1.70
F2 1.15 1.70
G 4.95 5.2
G1 2.4 2.7
H10 10.4
L2 16
L328.6 30.6
L4 9.8 10.6
L5 2.9 3.6
L6 15.9 16.4
L7 9 9.3
Dia 33.2
7012510_Rev_K
A
B
H
Dia
L7
D
E
L6 L5
L2
L3
L4
F1 F2
F
G
G1
Package mechanical data STx21N90K5
16/21 Doc ID 16744 Rev 5
Table 12. TO-247 mechanical data
Dim.
mm.
Min. Typ. Max.
A 4.85 5.15
A1 2.20 2.60
b1.0 1.40
b1 2.0 2.40
b2 3.0 3.40
c 0.40 0.80
D 19.85 20.15
E 15.45 15.75
e5.305.455.60
L 14.20 14.80
L1 3.70 4.30
L2 18.50
∅P3.55 3.65
∅R 4.50 5.50
S5.305.505.70
STx21N90K5 Package mechanical data
Doc ID 16744 Rev 5 17/21
Figure 29. TO-247 drawing
0075325_G
Packaging information STx21N90K5
18/21 Doc ID 16744 Rev 5
5 Packaging information
Table 13. D²PAK (TO-263) tape and reel mechanical data
Tape Reel
Dim.
mm
Dim.
mm
Min. Max. Min. Max.
A0 10.5 10.7 A 330
B0 15.7 15.9 B 1.5
D 1.5 1.6 C 12.8 13.2
D1 1.59 1.61 D 20.2
E 1.65 1.85 G 24.4 26.4
F 11.4 11.6 N 100
K0 4.8 5.0 T 30.4
P0 3.9 4.1
P1 11.9 12.1 Base qty 1000
P2 1.9 2.1 Bulk qty 1000
R50
T0.25 0.35
W23.7 24.3
STx21N90K5 Packaging information
Doc ID 16744 Rev 5 19/21
Figure 30. Tape
Figure 31. Reel
Revision history STx21N90K5
20/21 Doc ID 16744 Rev 5
6 Revision history
Table 14. Document revision history
Date Revision Changes
05-Nov-2009 1 First release.
18-Nov-2009 2 Updated description on cover page
12-Jan-2010 3Corrected VGS value in Table 2: Absolute maximum ratings
14-Jul-2010 4 Document status promoted from preliminary data to datasheet.
21-Dec-2011 5
Inserted device in D2PAK.
Updated Figure 2: Safe operating area for TO-220 / D2PAK,
Figure 4: Safe operating area for TO-220FP and Figure 6: Safe
operating area for TO-247.
Inserted Section 5: Packaging information on page 18.
Minor text changes.
STx21N90K5
Doc ID 16744 Rev 5 21/21
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