2005. 10. 26 1/5
SEMICONDUCTOR
TECHNICAL DATA KIA431S/AS/BS
BIPOLAR LINEAR INTEGRATED CIRCUIT
Revision No : 1
PROGRAMMABLE PRECISION REFERENCES
The KIA431S/AS/BS integrated circuits are three-terminal
programmable shunt regulator diodes. These monolithic IC voltage
reference operate as a low temperature coefficient zener which is
programmable from Vref to 20 volts with two external resistors.
These devices exhibit a wide operating current range of 1.0 to 100mA
with a typical dynamic impedance of 0.22 . The characteristics of
these references make them excellent replacements for zener diodes in
many applications such as digital voltmeters, power supplies, and op
amp circuitry. The 2.5 volt reference makes it convenient to obtain a
stable reference from 5.0 volt logic supplies, and since the
KIA431S/AS/BS operates as a shunt regulator, it can be used
as either a positive or negative voltage reference.
FEATURES
Programmable Output Voltage to 20 Volts.
Low Dynamic Output Impedance : 0.22 (Typ.).
Sink Current Capability of 1.0 to 100mA.
Equivalent Full-Range Temperature Coefficient of 50ppm/ (Typ.).
Temperature Compensated for Operation Over Full Rated
Operating Temperature Range.
Low Output Noise Voltage.
DIM MILLIMETERS
A
B
D
E
TSM
2.9 0.2
1.6+0.2/-0.1
0.70 0.05
0.4 0.1
2.8+0.2/-0.3
1.9 0.2
0.95
0.16 0.05
0.00-0.10
0.25+0.25/-0.15
C
F
G
H
I
J
K 0.60
L 0.55
A
F
G
G
D
KB
E
C
L
H
J
J
I
2
1
3
+
_
+
_
+
_
+
_
+
_
1. CATHODE
2. REFERENCE
3.ANODE
Note) * : Under development
Type No. Marking
KIA431S 3A
KIA431AS 3B
KIA431BS 3C
ITEM Vref Tolerance (%)
KIA431S 2.2
KIA431AS 1.0
* KIA431BS 0.5
Marking
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KIA431S/AS/BS
Revision No : 1
ELECTRICAL CHARACTERISTICS (Ta=25 )
MAXIMUM RATINGS (Ta=25 )
CHARACTERISTIC SYMBOL RATING UNIT
Cathode To Anode Voltage VKA 20 V
Cathode Current Range, Continuous IK-100 150 mA
Reference Input Current Range, Continuous Iref -0.05 10 mA
Operating Junction Temperature Tj150
Operating Temperature Topr -40 85
Storage Temperature Tstg -65 150
Total Power Dissipation (Note) PD900 mW
CHARACTERISTICS SYMBOL TEST
CIRCUIT TEST CONDITION MIN. TYP. MAX. UNIT
Reference Input
Voltage
KIA431S
Vref Figure 1 VKA=Vref , IK=10mA
2.440 2.495 2.550 V
KIA431AS 2.470 2.495 2.520 V
KIA431BS 2.4825 2.495 2.5075 V
Reference Input Voltage
Deviation Over Temperature Range Vref Figure 1
(Note 1) VKA=Vref , IK=10mA - 7.0 30 mV
Ratio of Change in Reference Input
Voltage to Change in Cathode to
Anode Voltage
Vref/
VKA Figure 2 IK=10mA
VKA=
10V Vref --1.4 -2.7
mV/V
VKA=
20V 10V --1.0 -2.0
Reference Input Current Ta=25 Iref Figure 2 IK=10mA, R1=10k , R2= - 1.8 4.0 A
Ta=Topr - - 6.5
Reference Input Current
Deviation Over Temperature Range Iref Figure 2 IK=10mA, R1=10k , R2= - 0.8 2.5 A
Minimum Cathode Current For Regulation Imin Figure 1 VKA=Vref - 0.5 1.0 mA
Off-State Cathode Current Ioff Figure 3 VKA=20V, Vref=0V - 2.6 1000 nA
Dynamic Impedance Zka Figure 1
(Note 2)
VKA=Vref, IK=1.0 100mA,
f1.0kHz - 0.22 -
Reference
(R)
Anode(A)
Cathode
(K)
(K)
Cathode
Anode(A)
Reference
(R)
2.5Vref
+
-
BLOCK DIAGRAM
Note) Package mounted on a ceramic board. (600m20.8m)
2005. 10. 26 3/5
KIA431S/AS/BS
Revision No : 1
Input VKA
IK
Vref
FIGURE 1-TEST CIRCUIT FOR VKA =V
ref
off
I
KA
V
Input
FIGURE 3-TEST CIRCUIT FOR Ioff
ref
V>
KA
V
FIGURE 2-TEST CIRCUIT FOR
K
I
KA
V
Input
R1
R2
Iref
Vref
VKA =ref
V(1+
R1
R2 )+I x
ref R1
ref
V Max.
Vref Min.
T1 T2
AMBIENT TEMPERATURE
Vref =V
ref (Max.)
ref
V (Min.)
Ta = T2-
-
T1
Example : Vref = 8.0mV and slope is positive,
Vref at 25 =2.495V, Ta=70
0.008 106
Vref = = 45.8 ppm/
70 (2.495)
Note 2: The dynamic impedance Zka is defined as:
VKA
|Zka| = Ik
When the device is programmed with two external
resistors, R1 and R2, (refer to Figure 2) the total
dynamic impedance of the circuit is defined as:
R1
|Zka'| = |Zka| (1+ )
R2
Note 1:
The deviation parameter Vref is defined as the differences
between the maximum and minimum values obtained over the
full operating ambient temperature range that applies.
The average temperature coefficient of the Reference
input voltage, Vref , is defined as:
Vref
( ) 106
ppm Vref at 25
Vref ( ) = Ta
Vref 106
=
Ta(Vref at 25 )
Vref can be positive or negative depending on whether
Vref Min. or Vref Max. occurs at the lower ambient temperature.
2005. 10. 26 4/5
KIA431S/AS/BS
Revision No : 1
-2.0
K
I - V
CATHODE VOLTAGE V (V)
-1.0 3.00 1.0 2.0
-100
50
-50
CATHODE CURRENT I (mA)
0
KA
K
KA
100
150
201005
CATHODE VOLTAGE V (V)
V - V
ref
1.0M100k10k 10M1.0k
FREQUENCY f (Hz)
Zka - f
FREQUENCY f (Hz)
G - f
VO
3.0
5.0
0
VOLTAGE SWING (V)
16128.0 204.0
TIME t (µs)
0
PULSE RESPONSE
-24
CHANGE IN REFERENCE INPUT
-32
-16
0
-8.0
VOLTAGE V (mV)
Zka (Ω)
100
10
0.1
DYNAMIC IMPEDANCE
1.0
G (dB)
0
-10
OPEN LOOP VOLTAGE GAIN
10
800
600
KA
K
KA
0
CATHODE CURRENT I (µA)
-200
2.01.00 3.0-1.0
CATHODE VOLTAGE V (V)
I - V
K
200
400
V =V
Ta=25 C
KA ref refKA
Ta=25 C
V =V
ref
15
Ta=25 C
K
I =10mA
I =1.0mA~100mA
Ta=25 C
K
VO
20
30
40
50
60
1.0k 10M10k 100k 1.0M
I =10mA
Ta=25 C
K
0
2.0
1.0
Ta=25 C
OUTPUT
INPUT
KA
KA
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KIA431S/AS/BS
Revision No : 1
ALLOWABLE POWER DISSIPATION P (mW)
D
D
P - Ta
12080400
AMBIENT TEMPERATURE Ta ( C)
0.2
0
160
0.8
1.0
THERMAL RESISTANCE
J-C
139
J-A
357 C/W
0.4
0.6
1006020 140
