CHENMKO ENTERPRISE CO.,LTD
SURFACE MOUNT ZENER
SILICON PLANAR POWER ZENER DIODES
VOLTAGE RANGE 2.4V TO 91V
MMSZ5221SPT
THRU
MMSZ5270SPT
FEATURE
*
*
*
*
*
*
*
Small surface mounting type. (SC-79/SOD-523)
High temperature soldering type.
ESD rating of class 3(>16 kV) per human body model.
Silicon planar zener diodes.
Silcon-oxide passivated junction.
Low temperature coefficient voltage
500 mW Rating on FR-4 or FR-5 Board
(1)
SC-79/SOD-523
Cathode
(2)
MECHANICAL
* SC-79/SOD-523 Packaging.
* Cathode indicated by polarity band.
* Mounting position: Any.
0.25~0.35
0.75~0.85
1.1~1.3
0.5~0.77
0.07~0.17
CIRCUIT
(2)
1.5~1.7
(1)
Dimensions in millimeters
SC-79/SOD-523
MAXIMUM RATINGES
( At T
A
= 25
o
C unless otherwise noted )
RATINGS
Zener Current ( see Table "Characteristics" )
Max. Steady State Power Dissipation @T
A
=25
o
C
Max. Operating Temperature Range
Storage Temperature Range
SYMBOL
-
P
D
T
J
T
STG
VALUE
-
225
-65 to +150
-65 to +150
UNITS
-
mW
o
C
C
o
ELECTRICAL CHARACTERISTICS
( At T
A
= 25
o
C unless otherwise noted )
CHARACTERISTICS
Thermal Resistance Junction to Ambient
Max. Instantaneous Forward Voltage at I
F=
10mA
SYMBOL
R
JA
MIN.
-
-
TYP.
-
-
MAX.
556
0.9
UNITS
o
C/W
V
F
Volts
2003-01
NOTES : 1. The JEDEC type numbers listd have a standaerd tolerance on the normal zener voltage of +10%, Suffix B=+5%.Suffix S=+2%
2. The zener impedance is derived from 1KHz AC voltage, which results when an AC current having an RMS value equal to 10%
of DC zener current (I
ZT
or I
ZK
) is superimposed on I
ZT
or I
ZK
. Zener impedance is measured at two points to insure a sharp knee
on the breakdown curve to eliminate unstable units.
3. Valid provided that electrodes at distance of 10mm from case are kept ambient temperature.
4. Measured under thermal equilibrium and DC test conditions.
5. The rating listd in the electrical characteristics table is maximum peak, non-repetitive, reverse surge current of 1/2 square wave
or equivalent sine wave pulse of 1/120 second duration superimposed on the test current, I
ZT
, per JEDEC registration.
RATING CHARACTERISTIC CURVES ( MMSZ5221SPT THRU MMSZ5270SPT)
FIG. 1 - TEMPERATURE COEFFICIENTS)
(TEMPERATURE RANGE 55
o
C TO
+150
o
C
)
8
7
6
5
4
3
2
1
0
-1
-2
-3
V
Z
@ I
ZT
TYPICAL TC VALUES
FOR MMSZ5221SPT SERIES
TEMPERATURE COEFFICIENT (mV/ oC)
TEMPERATURE COEFFICIENT (mV/ oC)
FIG. 2 - TEMPERATURE COEFFICIENTS)
(TEMPERATURE RANGE 55
o
C
TO +150
o
C
)
100
TYICAL TC VALUES
FOR MMSZ5221SPT SERIES
V
Z
@ I
ZT
10
VZ,
V
Z
NOMINAL ZENER VOLTAGE ( V )
VZ,
2
3
4
5
6
7
8
9
10
11
12
1
10
100
V
Z
NOMINAL ZENER VOLTAGE ( V )
FIG. 3 - EFFECT OF ZENER VOLTAGE ON
ZENER IMPEDANCE
1000
1000
FIG. 4 - TYPICAL FORWARD VOLTAGE
Z
ZT
DYNAMIC IMPEDANCE(
I
Z
= 1mA
100
5mA
I
F,
FORWARD CURRENT (mA)
T
J
=25
o
C
I
Z(AC)
=0.1I
Z(DC)
f=1KH
Z
)
75V (MMSZ5267SPT)
91V (MMSZ5270SPT)
100
20mA
10
10
150
o
C
75
o
C
25
o
C
0
o
C
1
1
10
100
1
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
V
Z
NOMINAL ZENER VOLTAGE ( V )
V
F
FORWARD VOLTARGE ( V )
RATING CHARACTERISTIC CURVES ( MMSZ5221SPT THRU MMSZ5270SPT )
FIG. 5 - TYPICAL CAPACITANCE
1000
T
A
=25 C
o
FIG. 6 - TYPICAL LEAKAGE CURRENT
1000
C, CAPACITANCE (pF)
0 V BIAS
1 V BIAS
I
R
,LEAKAGE CURRENT (uA)
100
10
1
0.1
0.01
0.001
0.0001
0.00001
0
10
20
30
40
50
60
25
o
C
-55
o
C
150
o
C
100
BIAS AT
50% OF V
Z
NOM
10
1
1
10
100
70
80
90
V
Z
NOMINAL ZENER VOLTAGE ( V )
V
Z
NOMINAL ZENER VOLTAGE ( V )
FIG. 7 - ZENER VOLTAGE VERSUS ZENER CURRENT
(V
Z
UP TO 12V)
100
T
A
=25
o
C
FIG. 8 - ZENER VOLTAGE VERSUS ZENER CURRENT
(12V TO 91V)
100
T
A
=25
o
C
I
Z
ZENER CURRENT (mA)
10
I
Z,
ZENER CURRENT
0
2
4
6
8
10
12
10
1
1
0.1
0.1
0.01
0.01
10
30
50
70
90
V
Z
ZENER VOLTAGE ( V )
V
Z
ZENER VOLTAGE ( V )
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