MMBZ5221B Series
Surface Mount Zener Diodes
Features:
*225mw Power Dissipation
*Ideal for Surface Mountted Application
*Zener Breakdown Voltage Range 2.4V to 91V
SMALL SIGNAL
ZENER DIODES
225m WATTS
Mechanical Data:
*Case : SOT-23 Molded plastic
*Terminals: Solderable per MIL-STD-202, Method 208
*Polarity: Cathode Indicated by Polarity Band
*Marking: Marking Code (See Table on Page 3)
*Weigh: 0.008grams(approx)
1
2
3
SOT-23
SOT-23 Outline Dimensions
Dim
A
B
C
D
E
G
H
J
K
L
M
Min
0.35
1.19
2.10
0.85
0.46
1.70
2.70
0.01
0.89
0.30
0.076
Max
0.51
1.40
3.00
1.05
1.00
2.10
3.10
0.13
1.10
0.61
0.25
Unit:mm
WEITRON
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MMBZ5221B Series
Total Power Dissipation on FR-5 Board
@T
A
=25 C
Thermal Resistance Junction to Ambient Air
Forward Voltage @ IF=10mA
Junction and Storage Temperature Range
NOTES:1.FR-5=1.0*0.75*0.62in
(1)
(1)
WEITRON
Maximum Ratings and Electrical Characteristics
(TA=25 C Unless Otherwise Noted)
Symbol
Characteristics
Unit
Value
PD
R JA
VF
Tj,TSTG
225
556
0.9
-65 to+150
mW
C/W
V
C
ELECTRICAL
CHARACTERISTICS
I
I
F
(P inout: 1-Anode, 2-No C onnection, 3-C athode) (T
A
= 25 C
unles s otherwis e noted, V
F
= 0.9V Max. @ I
F
= 10 mA)
Symbol
V
Z
I
ZT
Z
ZT
I
R
V
R
I
F
V
F
I
ZK
Z
ZK
R evers e C urrent
Parameter
R evers e Zener Voltage @ I
ZT
Maximum Zener Impedance @ I
ZT
R evers e Leakage C urrent @ V
R
R evers e Voltage
F orward C urrent
F orward Voltage @ I
F
R evers e C urrent
Maximum Zener Impedance@
I
ZK
V
Z
V
R
I
R
V
F
I
ZT
V
Zener V
oltage Regulator
Device Marking
Item
MMBZ5221B
Series
Marking
XX=Specific Device Code
(See Table on page3)
Equivalent Circuit Diagram
3
1
Cathode
Anode
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WEITRON
MMBZ5221B Series
E L E C T R IC A L C HA R A C T E R IS T IC S
(P inout: 1-Anode, 2-NC , 3-C athode) (V
F
= 0.9 V Max @ I
F
= 10 mA for all types .)
Zener Voltage (Note)
Devic e
Marking
18A
18B
18C
18D
18E
8A
8B
8C
8D
8E
V
Z
(Volts )
Min
2.28
2.37
2.56
2.66
2.85
3.13
3.42
3.70
4.08
4.46
Nom
2.4
2.5
2.7
2.8
3
3.3
3.6
3.9
4.3
4.7
Max
2.52
2.63
2.84
2.94
3.15
3.47
3.78
4.10
4.52
4.94
@ I
ZT
mA
20
20
20
20
20
20
20
20
20
20
Ω
30
30
30
30
29
28
24
23
22
19
Zener Impedanc e
Z
ZT
@ I
ZT
Z
ZK
@ I
ZK
Ω
1200
1250
1300
1400
1600
1600
1700
1900
2000
1900
mA
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
WE IT R ON
L eakage C urrent
I
R
@ V
R
uA
100
100
75
75
50
25
15
10
5
5
Volts
1
1
1
1
1
1
1
1
1
2
Devic e
MMB Z5221B LT 1
MMB Z5222B LT 1
MMB Z5223B LT 1
MMB Z5224B LT 1
MMB Z5225B LT 1
MMB Z5226B LT 1
MMB Z5227B LT 1
MMB Z5228B LT 1
MMB Z5229B LT 1
MMB Z5230B LT 1
MMB Z5231B LT 1
MMB Z5232B LT 1
MMB Z5233B LT 1*
MMB Z5234B LT 1
MMB Z5235B LT 1
MMB Z5236B LT 1
MMB Z5237B LT 1
MMB Z5238B LT 1
MMB Z5239B LT 1
MMB Z5240B LT 1
MMB Z5241B LT 1
MMB Z5242B LT 1
MMB Z5243B LT 1
MMB Z5244B LT 1
MMB Z5245B LT 1
MMB Z5246B LT 1*
MMB Z5247B LT 1
MMB Z5248B LT 1
MMB Z5249B LT 1
MMB Z5250B LT 1
MMB Z5251B LT 1*
MMB Z5252B LT 1*
MMB Z5253B LT 1
MMB Z5254B LT 1
MMB Z5255B LT 1
MMB Z5256B LT 1
MMB Z5257B LT 1
MMB Z5258B LT 1
MMB Z5259B LT 1
MMB Z5260B LT 1
MMB Z5261B LT 1
MMB Z5262B LT 1
MMB Z5263B LT 1
MMB Z5264B LT 1
MMB Z5265B LT 1
MMB Z5266B LT 1
MMB Z5267B LT 1
MMB Z5268B LT 1
MMB Z5269B LT 1
MMB Z5270B LT 1
8F
8G
8H
8J
8K
8L
8M
8N
8P
8Q
8R
8S
8T
8U
8V
8W
8X
8Y
8Z
81A
81B
81C
81D
81E
81F
81G
81H
81J
81K
81L
81M
81N
81P
81Q
81R
81S
81T
81U
81V
81W
4.84
5.32
5.70
5.89
6.46
7.12
7.79
8.26
8.64
9.50
10.4
11.40
12.35
13.30
14.25
15.20
16.15
17.10
18.05
19.00
20.90
22.80
23.75
25.65
26.60
28.50
31.35
34.20
37.05
40.85
44.65
48.45
53.20
57.00
58.90
64.60
71.25
77.90
82.65
86.45
5.1
5.6
6
6.2
6.8
7.5
8.2
8.7
9.1
10
11
12
13
14
15
16
17
18
19
20
22
24
25
27
28
30
33
36
39
43
47
51
56
60
62
68
75
82
87
91
5.36
5.88
6.30
6.51
7.14
7.88
8.61
9.14
9.56
10.50
11.55
12.60
13.65
14.70
15.75
16.80
17.85
18.90
19.95
21.00
23.10
25.20
26.25
28.35
29.40
31.50
34.65
37.80
40.95
45.15
49.35
53.55
58.80
63.00
65.10
71.40
78.75
86.10
91.35
95.55
20
20
20
20
20
20
20
20
20
20
20
20
9.5
9
8.5
7.8
7.4
7
6.6
6.2
5.6
5.2
5
4.6
4.5
4.2
3.8
3.4
3.2
3
2.7
2.5
2.2
2.1
2
1.8
1.7
1.5
1.4
1.4
17
11
7
7
5
6
8
8
10
17
22
30
13
15
16
17
19
21
23
25
29
33
35
41
44
49
58
70
80
93
105
125
150
170
185
230
270
330
370
400
1600
1600
1600
1000
750
500
500
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
600
700
700
800
900
1000
1100
1300
1400
1400
1600
1700
2000
2200
2300
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
5
5
5
5
3
3
3
3
3
3
2
1
0.5
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
2
3
3.5
4
5
6
6.5
6.5
7
8
8.4
9.1
9.9
10
11
12
13
14
14
15
17
18
19
21
21
23
25
27
30
33
36
39
43
46
47
52
56
62
68
69
NOT E . Zener voltage is meas ured with a puls e tes t current I
Z
at an ambient temperature of 25 C
WEITRON
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MMBZ5221B Series
T Y P IC A L C HA R A C T E R IS T IC S
1000
1000
WE IT R ON
I R , LEAKAGE CURRENT (
µ
A)
0 V BIAS
1 V BIAS
C, CAPACITANCE (pF)
100
T
A
= 25C
100
10
1
+150 C
B IA S T A
50% OF V
Z
NOM
10
0.1
0.01
0.001
+25 C
±55 C
0.0001
1
1
10
V
Z
, NOMINA L ZE NE R V OLTA G E (V )
100
0.00001
0
10
20
30
40
50
60
70
80
90
V
Z
, NOMINA L ZE NE R V OL G E (V )
TA
F igure 5. Typic al C apac itanc e
F igure 6. Typic al L eakage C urrent
100
100
T
A
= 25C
I Z , ZENER CURRENT (mA)
I Z , ZENER CURRENT (mA)
10
10
T
A
= 25C
1
1
0.1
0.1
0.01
0
2
4
6
8
10
12
0.01
10
30
50
70
90
V
Z
, ZE NE R V OLTA G E (V )
V
Z
, ZE NE R V OLTA G E (V )
F igure 7. Zener Voltage vers us Zener C urrent
(V
Z
Up to 12 V )
F igure 8. Zener Voltage vers us Zener C urrent
(12 V to 91 V )
WEITRON
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MMBZ5221B Series
T Y P IC A L C HA R A C T E R IS T IC S
θ
VZ, TEMPERATURE COEFFICIENT (mV/C)
8
7
6
5
4
3
2
1
0
±1
±2
±3
2
3
4
5
6
7
8
9
10
11
12
V
Z
, NOMINA L ZE NE R V OL G E (V )
TA
T Y P IC A L T
C
VA L UE S
F OR MMB Z5221B L 1 S E R IE S
T
100
WE IT R ON
θ
VZ, TEMPERATURE COEFFICIENT (mV/C)
T Y P IC A L T
C
VA L UE S
F OR MMB Z5221B L 1 S E R IE S
T
V
Z
@ I
ZT
V
Z
@ I
ZT
10
1
10
V
Z
, NOMINA L ZE NE R V OLTA G E (V )
100
F igure 1. Temperature C oeffic ients
(Temperature R ange ± 5 5 C to +150 C )
F igure 2. Temperature C oeffic ients
(Temperature R ange ± 5 C to +150 C )
5
1000
T
J
= 25 C
I
Z(A C )
= 0.1
Z(
I
DC )
f = 1 kHz
1000
75 V (MMB Z5267BT 1)
L
91 V (MMB Z5270BT 1)
L
Z ZT, DYNAMIC IMPEDANCE
Ω
)
(
I
Z
= 1 mA
100
IF, FORWARD CURRENT (mA)
100
5 mA
20 mA
10
10
150 C
1
1
10
V
Z
, NOMINA L ZE NE R V OLTA G E
100
1
0.4
75 C 25 C
0.6
0.7
0C
0.8
0.9
1.0
1.1
1.2
0.5
V
F
, F OR R D V OL G E (V )
WA
TA
F igure 3. E ffec t of Zener V
oltage on
Zener Impedanc e
F igure 4. Typic al F orward Voltage
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