Jiangsu CJ431K Adjustable accurate reference source Datasheet

JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD
JC(T
CJ431K
SOT-23 Encapsulate Adjustable Reference Source
Adjustable Accurate Reference Source
DEVICE DESCRIPSION
The CJ431K is a three-terminal adjustable shunt regulator offering
excellent temperature stability . This device has a typical dynamic output
impedance of 0.2Ω. The device can be used as a replacement for zener
diodes in many applications.
SOT-23
1. REFERENCE
2. CATHODE
FEATURES
3. ANODE
z The output voltage can be adjusted to 36V
z Low dynamic output impedance, its typical value is 0.2Ω
z Trapping current capability is 1 to 100mA
z Low output noise voltage
z Fast on -state response
z The effective temperature compensation in the working range of full temperature
z The typical value of the equivalent temperature factor in the whole temperature scope is 50 ppm/℃
APPLICATION
z Shunt Regulator
z High-Current Shunt Regulator
z Precision Current Limiter
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
Parameter
Cathode Voltage
Cathode Current Range (Continuous)
Symbol
Value
VKA
37
V
-100~+150
mA
Reference lnput Current Range
Iref
0.05~+10
mA
Power Dissipation
PD
300
mW
Thermal Resistance from Junction
to Ambient
RθJA
417
℃/W
Tj
150
℃
Operating Junction Temperature
IKA
Unit
Operating Ambient Temperature Range
Topr
-25~+125
℃
Storage Temperature Range
Tstg
-65~+150
℃
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ELECTRICAL CHARACTERISTICS (Ta=25℃ unless otherwise specified)
Parameter
Symbol
Reference lnput Voltage (Fig.1)
Deviation of Reference Input Voltage
Over Temperature (note) (Fig.1)
conditions
Test
Vref
VKA=VREF, IKA=10mA
Over Full Temperature Range (Fig.2)
Minimum Cathode Current for
Regulation (Fig.1)
Off-state Cathode Current (Fig.3)
Dynamic lmpedance
V
-1.0
-2.7
mV/V
-0.5
-2.0
mV/V
1.5
4
μA
R2=∞
TA=-25 to 125℃
0.4
1.2
μA
VKA=VREF
0.45
1.0
mA
0.05
0.5
μA
0.15
0.5
Ω
IKA=10mA
=10V~VREF
△VKA
=36V~ 10V
Deviation Of Reference lnput Current
2.520
mV
△VKA
IKA= 10mA,R1=10 kΩ
lref
Unit
17
Voltage (Fig.2)
Reference lnput Current (Fig.2)
Max
4.5
Tmin≤Ta≤Tmax
△Vref /△VKA
Typ
2.470
VKA =VREF, IKA =10mA
△Vref /△T
Ratio Of Change in Reference lnput
Voltage to the Change in Cathode
Min
R2=∞
lKA=10mA, R1=10 kΩ
△lref /△T
IKA(min)
VKA=40V,VREF=0
IKA(OFF)
VKA=VREF, lKA=1 to 100mA
ZKA
f≤1.0kHz
Note: TMIN=-25℃ ,TMAX=+125℃
CLASSIFICATION RI Vref
Rank
0.5%
1%
Range
2.482-2.508
2.47-2.52
Figure 1. Test Circuit for VKA = Vref
Input
IK
VKA
Figure 2. Test Circuit for VKA > Vref
R1
Vref
VKA
Input
Iref
R2
Input
Ioff
IK
V
KA
Figure 3. Test Circuit for Ioff
VKA
ǒ Ǔ
+ Vref 1 ) R1
) Iref S R1
R2
Vref
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Typical Characteristics
Cathode Current versus
Cathode Voltage
IK, CATHODE CURRENT
(mA)
150
100
50
0
-50
VKA=Vref
-100
Ta=25℃
-2
-1
0
1
2
VKA, CATHODE VOLTAGE
3
(V)
KA
Cathode Current versus
Cathode Voltage
800
IK, CATHODE CURRENT
(uA)
KA
600
IKA(min)
400
200
ref
0
VKA=Vref
-200
Ta=25℃
-1
1
2
VKA, CATHODE VOLTAGE
(V)
0
3
Test Circuit for VKA=Vref
Reference Input Voltage versus
Ambient Temperature
Vref, REFERENCE INPUT VOLTAGE
(mV)
2600
2550
2500
2450
2400
VKA=Vref
2350
-40
IK=10mA
-20
0
20
40
Ta, AMBIENT TEMPERATURE
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60
80
100
(℃)
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Typical Characteristics
Change in Reference Input
Voltage versus Cathode Voltage
0
△Vref, REFERENCE INPUT VOLTAGE
(mV)
IK=10mA
Ta=25℃
-4
-8
-12
-16
-20
0
5
10
15
20
25
VKA, CATHODE VOLTAGE
(uA)
35
40
Test Circuit for VKA=Vref(1+R1/R2)+R1*Iref
Reference Input Current versus
Ambient Temperature
3.0
Iref, REFERENCE INPUT CURRENT
30
(V)
2.5
2.0
1.5
1.0
0.5
IK=10mA
0.0
-40
R1=10KΩ
-20
0
20
40
60
Ta, AMBIENT TEMPERATURE
80
100
(℃)
Test Circuit for Iref
Off-State Cathode Current
versus Ambient Temperature
Ioff, OFF-STATE CATHODE CURRENT
(nA)
40
30
20
10
VKA=36V
Vref=0V
0
-40
-20
0
20
40
Ta, AMBIENT TEMPERATURE
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60
80
Test Circuit for Ioff
100
(℃)
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SOT-23 Package Outline Dimensions
Symbol
A
A1
A2
b
c
D
E
E1
e
e1
L
L1
θ
Dimensions In Millimeters
Min
Max
0.900
1.150
0.000
0.100
0.900
1.050
0.300
0.500
0.080
0.150
2.800
3.000
1.200
1.400
2.250
2.550
0.950 TYP
1.800
2.000
0.550 REF
0.300
0.500
0°
8°
Dimensions In Inches
Min
Max
0.035
0.045
0.000
0.004
0.035
0.041
0.012
0.020
0.003
0.006
0.110
0.118
0.047
0.055
0.089
0.100
0.037 TYP
0.071
0.079
0.022 REF
0.012
0.020
0°
8°
SOT-23 Suggested Pad Layout
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SOT-23 Tape and Reel
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