LESHAN RADIO COMPANY, LTD.
Zener Voltage Regulators
225 mW SOT–23 Surface Mount
This series of Zener diodes is offered in the convenient, surface
mount plastic SOT–23 package. These devices are designed to provide
voltage regulation with minimum space requirement. They are well
suited for applications such as cellular phones, hand held portables,
and high density PC boards.
Specification Features:
LMBZ52xxBL
Series
3
1
2
SOT-23 (TO-236AB)
•
•
•
•
•
225 mW Rating on FR–4 or FR–5 Board
Zener Voltage Range – 2.4 V to 91 V
Small Package Size for High Density Applications
ESD Rating of Class 3 (>16 KV) per Human Body Model
Pb-Free Package is available.
3
Cathode
1
Anode
260°C for 10 Seconds
POLARITY:
Cathode indicated by polarity band
FLAMMABILITY RATING:
UL94 V–0
MAXIMUM RATINGS
Rating
Total Power Dissipation on FR–5 Board,
(Note 1) @ T
A
= 25°C
Derated above 25°C
Thermal Resistance –
Junction–to–Ambient
Total Power Dissipation on Alumina
Substrate, (Note 2) @ T
A
= 25°C
Derated above 25°C
Thermal Resistance –
Junction‘to–Ambient
Junction and Storage
Temperature Range
Symbol
P
D
225
1.8
R
qJA
P
D
300
2.4
R
qJA
T
J
, T
stg
417
–65 to
+150
mW
mW/°C
°C/W
°C
556
mW
mW/°C
°C/W
Max
Unit
xxx = Specific Device Code
M = Date Code
ORDERING INFORMATION
Device
*1
LMBZ52xxBLT1
LMBZ52xxBLT1G
(Pb-Free)
LMBZ52xxBLT3
*2
LMBZ52xxBLT3G
(Pb-Free)
Package
SOT-23
SOT-23
SOT-23
SOT-23
Shipping
3000/Tape&Reel
3000/Tape&Reel
10,000/Tape&Reel
10,000/Tape&Reel
*
2
LMBZ5233BLT1,
LMBZ5246BLT1,
LMBZ5251BLT1, and LMBZ5252BLT1 Not Avail-
able in 10,000/Tape & Reel.
*
1
The "T1" suffix refers to an 8 mm, 7 inch reel.
The " T3" suffix refers to an 8 mm, 13 inch reel.
The " G " suffix refers to Pb-Free package.
1. FR–5 = 1.0 X 0.75 X 0.62 in.
2. Alumina = 0.4 X 0.3 X 0.024 in., 99.5% alumina
LMBZ52xxBLT1–1/6
M
Mechanical Characteristics:
CASE:
Void-free, transfer-molded, thermosetting plastic case
FINISH:
Corrosion resistant finish, easily solderable
MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:
MARKING DIAGRAM
xxx
LESHAN RADIO COMPANY, LTD.
LMBZ5221BLT1
Series
ELECTRICAL CHARACTERISTICS
(Pinout: 1-Anode, 2-No Connection, 3-Cathode) (T
A
= 25°C
unless otherwise noted, V
F
= 0.95 V Max. @ I
F
= 10 mA)
Symbol
V
Z
I
ZT
Z
ZT
I
ZK
Z
ZK
I
R
V
R
I
F
V
F
Parameter
Reverse Zener Voltage @ I
ZT
Reverse Current
Maximum Zener Impedance @ I
ZT
Reverse Current
Maximum Zener Impedance @ I
ZK
Reverse Leakage Current @ V
R
Reverse Voltage
Forward Current
Forward Voltage @ I
F
V
Z
V
R
I
F
I
I
R
V
F
I
ZT
V
Zener Voltage Regulator
LMBZ52xxBLT1-2/6
LESHAN RADIO COMPANY, LTD.
LMBZ5221BLT1
Series
ELECTRICAL CHARACTERISTICS
(Pinout: 1-Anode, 2-NC, 3-Cathode) (V
F
= 0.9 V Max @ I
F
= 10 mA for all types.)
Zener Voltage
(Note 3)
Device
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
W
30
30
30
30
29
28
24
23
22
19
Zener Impedance
Z
ZT
@ I
ZT
Z
ZK
@ I
ZK
W
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
Leakage Current
I
R
@ V
R
mA
100
100
75
75
50
25
15
10
5
5
Volts
1
1
1
1
1
1
1
1
1
2
Device
LMBZ5221BLT1
LMBZ5222BLT1
LMBZ5223BLT1
LMBZ5224BLT1
LMBZ5225BLT1
LMBZ5226BLT1
LMBZ5227BLT1
LMBZ5228BLT1
LMBZ5229BLT1
LMBZ5230BLT1
LMBZ5231BLT1
LMBZ5232BLT1
LMBZ5233BLT1*
LMBZ5234BLT1
LMBZ5235BLT1
LMBZ5236BLT1
LMBZ5237BLT1
LMBZ5238BLT1
LMBZ5239BLT1
LMBZ5240BLT1
LMBZ5241BLT1
LMBZ5242BLT1
LMBZ5243BLT1
LMBZ5244BLT1
LMBZ5245BLT1
LMBZ5246BLT1*
LMBZ5247BLT1
LMBZ5248BLT1
LMBZ5249BLT1
LMBZ5250BLT1
LMBZ5251BLT1*
LMBZ5252BLT1*
LMBZ5253BLT1
LMBZ5254BLT1
LMBZ5255BLT1
LMBZ5256BLT1
LMBZ5257BLT1
LMBZ5258BLT1
LMBZ5259BLT1
LMBZ5260BLT1
LMBZ5261BLT1
LMBZ5262BLT1
LMBZ5263BLT1
LMBZ5264BLT1
LMBZ5265BLT1
LMBZ5266BLT1
LMBZ5267BLT1
LMBZ5268BLT1
LMBZ5269BLT1
LMBZ5270BLT1
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
3. Zener voltage is measured with a pulse test current I
Z
at an ambient temperature of 25°C
*Not Available in the 10,0000/Tape & Reel.
LMBZ52xxBLT1-3/6
LESHAN RADIO COMPANY, LTD.
LMBZ5221BLT1
Series
TYPICAL CHARACTERISTICS
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
TYPICAL T
C
VALUES
FOR
LMBZ5221BLT1
SERIES
100
θ
VZ, TEMPERATURE COEFFICIENT (mV/
°
C)
TYPICAL T
C
VALUES
FOR
LMBZ5221BLT1
SERIES
V
Z
@ I
ZT
V
Z
@ I
ZT
10
1
10
V
Z
, NOMINAL ZENER VOLTAGE (V)
100
V
Z
, NOMINAL ZENER VOLTAGE (V)
Figure 1. Temperature Coefficients
(Temperature Range –55°C to +150°C)
Figure 2. Temperature Coefficients
(Temperature Range –55°C to +150°C)
1000
T
J
= 255C
I
Z(AC)
= 0.1 I
Z(DC)
f = 1 kHz
1000
75 V (LMBZ5267BLT1)
91 V (LMBZ5270BLT1)
Z ZT, DYNAMIC IMPEDANCE (
Ω
)
I
Z
= 1 mA
100
IF, FORWARD CURRENT (mA)
100
5 mA
20 mA
10
10
1505C
1
1
10
V
Z
, NOMINAL ZENER VOLTAGE
100
1
0.4
75°C 25°C
0.6
0.7
0°C
0.8
0.9
1.0
1.1
1.2
0.5
V
F
, FORWARD VOLTAGE (V)
Figure 3. Effect of Zener Voltage on
Zener Impedance
Figure 4. Typical Forward Voltage
LMBZ52xxBLT1-4/6
LESHAN RADIO COMPANY, LTD.
LMBZ5221BLT1
Series
TYPICAL CHARACTERISTICS
1000
1000
0 V BIAS
1 V BIAS
C, CAPACITANCE (pF)
100
I R , LEAKAGE CURRENT (
µ
A)
T
A
= 25°C
100
10
1
+1505C
0.1
BIAS AT
50% OF V
Z
NOM
0.01
+255C
10
0.001
0.0001
1
1
10
V
Z
, NOMINAL ZENER VOLTAGE (V)
100
0.00001
0
10
20
30
40
50
60
–555C
70
80
90
V
Z
, NOMINAL ZENER VOLTAGE (V)
Figure 5. Typical Capacitance
Figure 6. Typical Leakage Current
100
100
T
A
= 25°C
I Z , ZENER CURRENT (mA)
I Z , ZENER CURRENT (mA)
10
10
T
A
= 25°C
1
1
0.1
0.1
0.01
0
2
4
6
V
Z
, ZENER VOLTAGE (V)
8
10
12
0.01
10
30
50
V
Z
, ZENER VOLTAGE (V)
70
90
Figure 7. Zener Voltage versus Zener Current
(V
Z
Up to 12 V)
Figure 8. Zener Voltage versus Zener Current
(12 V to 91 V)
LMBZ52xxBLT1-5/6
