LESHAN RADIO COMPANY, LTD.
Zener Voltage Regulators
500 mW SOD−123 Surface Mount
Three complete series of Zener diodes are offered in the convenient,
surface mount plastic SOD−123 package. These devices provide a
convenient alternative to the leadless 34−package style.
Features
1
SOD−123
LMSZ4678T1G Series
2
•
•
•
•
•
•
•
500
mW Rating on FR−4 or FR−5 Board
Wide Zener Reverse Voltage Range − 1.8 V to 43 V
Package Designed for Optimal Automated Board Assembly
Small Package Size for High Density Applications
General Purpose, Medium Current
ESD Rating of Class 3 (>16 kV) per Human Body Model
We declare that the material of product
compliance with RoHS requirements.
1
Cathode
2
Anode
Mechanical Characteristics:
CASE:
Void-free, transfer-molded, thermosetting plastic case
FINISH:
Corrosion resistant finish, easily solderable
MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:
MARKING DIAGRAM
260°C for 10 Seconds
POLARITY:
Cathode indicated by polarity band
FLAMMABILITY RATING:
UL 94 V−0
MAXIMUM RATINGS
Rating
Total Power Dissipation on FR−5 Board,
(Note 1) @ T
L
= 75°C
Derated above 75°C
Thermal Resistance, Junction−to−Ambient
(Note 2)
Thermal Resistance, Junction−to−Lead
(Note 2)
Junction and Storage Temperature Range
Symbol
P
D
500
6.7
R
qJA
R
qJL
T
J
, T
stg
340
150
−55 to +150
mW
mW/°C
°C/W
Max
Unit
1
xx
xx
M
= Device Code
= Date Code
ORDERING INFORMATION
°C/W
°C
Device
LMSZ4678T1G
Series
LMSZ4678T3G
Series
Package
SOD−123
Shipping
3000/Tape & Reel
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.
1. FR−5 = 3.5 X 1.5 inches, using the minimum recommended footprint.
2. Thermal Resistance measurement obtained via infrared Scan Method.
M
10,000/Tape & Reel
Rev.O 1/6
SOD−123
LESHAN RADIO COMPANY, LTD.
LMSZ4678T1G Series
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless
otherwise noted, V
F
= 0.95 V Max. @ I
F
= 10 mA)
Symbol
V
Z
I
ZT
I
R
V
R
I
F
V
F
Parameter
Reverse Zener Voltage @ I
ZT
Reverse Current
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
Rev.O 2/6
LESHAN RADIO COMPANY, LTD.
LMSZ4678T1G Series
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted, V
F
= 0.9 V Max. @ I
F
= 10 mA)
Zener Voltage
(Note 3)
Device
Marking
CC
CD
V
Z
(Volts)
Min
1.71
1.90
Nom
1.8
2.0
Max
1.89
2.10
@ I
ZT
mA
50
50
mA
7.5
5
Leakage Current
I
R
@ V
R
Volts
1
1
Device
LMSZ4678T1G
LMSZ4679T1G
LMSZ4680T1G
LMSZ4681T1G
LMSZ4682T1G
LMSZ4683T1G
LMSZ4684T1G
CE
CF
CH
CJ
CK
2.09
2.28
2.565
2.85
3.13
2.2
2.4
2.7
3.0
3.3
2.31
2.52
2.835
3.15
3.47
50
50
50
50
50
4
2
1
0.8
7.5
1
1
1
1
1.5
LMSZ4685T1G
LMSZ4686T1G
LMSZ4687T1G
LMSZ4688T1G
LMSZ4689T1G
CM
CN
CP
CT
CU
3.42
3.70
4.09
4.47
4.85
3.6
3.9
4.3
4.7
5.1
3.78
4.10
4.52
4.94
5.36
50
50
50
50
50
7.5
5
4
10
10
2
2
2
3
3
LMSZ4690T1G
LMSZ4691T1G
LMSZ4692T1G
LMSZ4693T1G
LMSZ4694T1G
LMSZ4695T1G
LMSZ4696T1G
LMSZ4697T1G
LMSZ4698T1G
LMSZ4699T1G
LMSZ4700T1G
LMSZ4701T1G
LMSZ4702T1G
LMSZ4703T1G
LMSZ4704T1G
LMSZ4705T1G
LMSZ4706T1G
LMSZ4707T1G
LMSZ4708T1G
LMSZ4709T1G
LMSZ4710T1G
LMSZ4711T1G
LMSZ4712T1G
LMSZ4713T1G
LMSZ4714T1G
LMSZ4715T1G
LMSZ4716T1G
LMSZ4717T1G
CV
CA
CX
CY
CZ
DC
DD
DE
DF
DH
DJ
DK
DM
DN
DP
DT
DU
DV
DA
DX
DY
EA
EC
ED
EE
EF
EH
EJ
5.32
5.89
6.46
7.13
7.79
8.27
8.65
9.50
10.45
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
5.6
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
5.88
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
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
10
10
10
10
1
1
1
1
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
4
5
5.1
5.7
6.2
6.6
6.9
7.6
8.4
9.1
9.8
10.6
11.4
12.1
12.9
13.6
14.4
15.2
16.7
18.2
19.0
20.4
21.2
22.8
25.0
27.3
29.6
32.6
3. Nominal Zener voltage is measured with the device junction in thermal equilibrium at T
L
= 30°C
±1°C.
Rev.O 3/6
LESHAN RADIO COMPANY, LTD.
TYPICAL CHARACTERISTICS
θ
VZ, TEMPERATURE COEFFICIENT (mV/
°
C)
7
6
5
4
3
2
1
0
−1
−2
−3
V
Z
@ I
ZT
TYPICAL T
C
VALUES
θ
VZ, TEMPERATURE COEFFICIENT (mV/
°
C)
8
100
TYPICAL T
C
VALUES
LMSZ4678T1G Series
V
Z
@ I
ZT
10
2
3
4
5
6
7
8
9
10
V
Z
, NOMINAL ZENER VOLTAGE (V)
11
12
1
10
V
Z
, NOMINAL ZENER VOLTAGE (V)
100
Figure 1. Temperature Coefficients
(Temperature Range − 55°C to +150°C)
Figure 2. Temperature Coefficients
(Temperature Range − 55°C to +150°C)
1.2
P
D
, POWER DISSIPATION (WATTS)
1.0
0.8
0.6
0.4
0.2
0
0
25
50
75
100
T, TEMPERATURE (5C)
125
P
D
versus T
A
P
D
versus T
L
1000
Ppk , PEAK SURGE POWER (WATTS)
RECTANGULAR
WAVEFORM, T
A
= 25°C
100
10
150
1
0.1
1
10
PW, PULSE WIDTH (ms)
100
1000
Figure 3. Steady State Power Derating
Figure 4. Maximum Nonrepetitive Surge Power
1000
1000
I
Z
= 1 mA
IF, FORWARD CURRENT (mA)
T
J
= 25°C
I
Z(AC)
= 0.1 I
Z(DC)
f = 1 kHz
75 V (MMSZ5267BT1)
91 V (MMSZ5270BT1)
100
Z ZT, DYNAMIC IMPEDANCE (
Ω
)
100
5 mA
20 mA
10
10
1505C
1
755C 255C
0.6
05C
1.1
1.2
1
10
V
Z
, NOMINAL ZENER VOLTAGE
100
1
0.4
0.5
0.7
0.8
0.9
1.0
V
F
, FORWARD VOLTAGE (V)
Figure 5. Effect of Zener Voltage on
Zener Impedance
Figure 6. Typical Forward Voltage
Rev.O 4/6
LESHAN RADIO COMPANY, LTD.
TYPICAL CHARACTERISTICS
LMSZ4678T1G Series
1000
0 V BIAS
1 V BIAS
C, CAPACITANCE (pF)
100
BIAS AT
50% OF V
Z
NOM
10
T
A
= 25°C
1000
I R , LEAKAGE CURRENT (
µ
A)
100
10
1
0.1
0.01
+255C
−555C
0
10
20
30
40
50
60
70
V
Z
, NOMINAL ZENER VOLTAGE (V)
80
90
+1505C
0.001
0.0001
1
1
10
V
Z
, NOMINAL ZENER VOLTAGE (V)
100
0.00001
Figure 7. Typical Capacitance
Figure 8. Typical Leakage Current
100
T
A
= 25°C
100
T
A
= 25°C
I Z , ZENER CURRENT (mA)
I Z , ZENER CURRENT (mA)
10
10
1
1
0.1
0.1
0.01
0
2
4
6
8
V
Z
, ZENER VOLTAGE (V)
10
12
0.01
10
30
50
70
V
Z
, ZENER VOLTAGE (V)
90
Figure 9. Zener Voltage versus Zener Current
(V
Z
Up to 12 V)
Figure 10. Zener Voltage versus Zener Current
(12 V to 91 V)
Rev.O 5/6
Embedded System
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