JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD
SOT-89-3L
Encapsulate Adjustable Reference Source
CJ431
Adjustable Accurate Reference Source
FEATURES
The output voltage can be adjusted to 36V
Low dynamic output impedance ,its typical value is
0.2Ω
Trapping current capability is 1 to
100mA
The typical value of the equivalent temperature factor in the
whole temperature scope is
50
ppm/
℃
The effective temperature compensation in the working
range of full temperature
Low output noise voltage
Fast on -state response
SOT-89-3L
1.REFERENCE
2.ANODE
1
2
3
3.CATHODE
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unlessotherwise specified)
Parameter
Cathode Voltage
Cathode Current Range (Continuous)
Reference lnput Current Range
Power Dissipation
Symbol
V
KA
I
KA
Iref
P
D
R
θJA
Topr
Tstg
Value
37
-100-+150
0.05-+10
500
Units
V
mA
mA
mW
Thermal Resistance from Junction to Ambient
Operating temperature
Storage temperature Range
250
0-70
-65-+150
℃/W
℃
℃
ELECTRICAL CHARACTERISTICS (T
a
=25
℃
unless otherwise specified)
Parameter
Reference lnput Voltage
Deviation of reference input Voltage
Over temperature (note)
Ratio Of Change in Reference lnput
Voltage to the change in Cathode
Voltage
Reference lnput Current
Deviation Of Reference lnput Current
Over Full Temperature Range
Minimum cathode current for
regulation
Off-state cathode Current
Dynamic lmpedance
Symbol
V
ref
△
V
ref
/
△
T
Test
conditions
Min
2.450
Typ
2.5
4.5
-1.0
-0.5
1.5
0.4
0.45
0.05
0.15
Max
2.550
17
-2.7
-2.0
4
1.2
1.0
1.0
0.5
U
nit
V
mV
mV/V
mV/V
μA
μA
mA
μA
Ω
V
KA
=V
REF
, I
KA
=10mA
V
KA
=V
REF
, I
KA
=10mA
Tmin≤Ta≤Tmax
I
KA
=10mA
△
V
KA
=10V~V
REF
△
V
ref
/
△
V
KA
l
ref
△
l
ref
/
△
T
I
KA(min)
I
KA(OFF)
Z
KA
△V
KA
=36V~10V
I
KA
= 10mA,R
1
=10KΩ
R
2
=∞
l
KA
=10mA, R
1
=10KΩ
R
2
=∞
T
A
=full Temperature
V
KA
=V
REF
V
KA
=36V ,V
REF
=0
V
KA
=V
REF
, l
KA
=1 to 100mA
f≤1.0KHz
Note:T
MIN
=
0
℃
,
T
MAX
=+
70
℃
CLASSIFICATION OF V
ref
Rank
Range
0.5%
2.487-2.513
1%
2.475-2.525
2%
2.450-2.550
B,Jan,2011
Typical Characteristics
150
CJ431
Cathode Current versus
Cathode Voltage
I
K
, CATHODE CURRENT
(mA)
100
50
0
-50
V
KA
=V
ref
-100
-2
-1
0
1
2
T
a
=25
℃
3
V
KA
, CATHODE VOLTAGE
(V)
800
700
Cathode Current versus
Cathode Voltage
KA
KA
I
KA(min)
(uA)
I
K
, CATHODE CURRENT
600
500
400
300
200
100
0
-100
-200
-1.0
ref
V
KA
=V
ref
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
T
a
=25
℃
3.0
V
KA
, CATHODE VOLTAGE
(V)
Test Circuit for V
KA
=V
ref
2525
Reference Input Voltage versus
Ambient Temperature
V
ref
, REFERENCE INPUT VOLTAGE
(mV)
2500
2475
2450
V
KA
=V
ref
2425
-40
-20
0
20
40
60
80
I
K
=10mA
100
T
a
, AMBIENT TEMPERATURE
(
℃
)
B,Jan,2011
Typical Characteristics
0
CJ431
Change in Reference Input
Voltage versus Cathode Voltage
I
K
=10mA
T
a
=25
℃
(mV)
△
V
ref
, REFERENCE INPUT VOLTAGE
-4
-8
-12
-16
-20
0
5
10
15
20
25
30
35
40
Test Circuit for V
KA
=V
ref
(1+R1/R2)+R1*I
ref
V
KA
, CATHODE VOLTAGE
(V)
1.50
Reference Input Current versus
Ambient Temperature
(uA)
I
ref
, REFERENCE INPUT CURRENT
1.25
1.00
0.75
0.50
0.25
I
K
=10mA
0.00
-40
R
1
=10KΩ
-20
0
20
40
60
80
100
T
a
, AMBIENT TEMPERATURE
(
℃
)
Test Circuit for I
ref
100
Off-State Cathode Current
versus Ambient Temperature
(nA)
I
off
, OFF-STATE CATHODE CURRENT
80
60
40
20
V
KA
=36V
V
ref
=0V
0
-40
-20
0
20
40
60
80
100
T
a
, AMBIENT TEMPERATURE
(
℃
)
Test Circuit for I
off
B,Jan,2011
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