2013. 4. 16 1/8Revision No : 18
PROGRAMMABLE PRECISION REFERENCES
The KIA431 Series 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 36 volts with two external resistors. These devices exhibit a wide operating current range of 1.0 to 100mA with a
typical dynamic impedance of 0.22Ω.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 KIA431 Series
operates as a shunt regulator, it can be used as either a positive or negative voltage reference.
FEATURES
·Divice Code Name :KIA431 + Vref Code + Package Code+Pin Configuration Code
·Low Dynamic Output Impedance : 0.22Ω(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.
·Qualified to AEC-Q101.
LINE UP
SEMICONDUCTOR
TECHNICAL DATA
KIA431 Series
BIPOLAR LINEAR INTEGRATED CIRCUIT
ITEM Vref Code Package Code
KIA431
Code Tolerance (%) Code Package
Blank ±2.2 Blank TO-92
Z±1.5 F SOT-89
A±1.0 S TSM
B±0.5 T TSV
M SOT-23
PIN CONFIGURATION (SOT-23)
3
3
2
21
1
1. Cathode 2. Ref 3. Anode
TOP
VIEW
Type No. Operating Voltage(V) Package Marking
KIA431
2.5 ~ 36
TO-92
KIA431Z
KIA431A
KIA431B
KIA431F
SOT-89
3A
KIA431ZF 3Z
KIA431AF 3B
KIA431BF 3C
KIA431T
TSV
43C
KIA431AT 43A
KIA431BT 43B
KIA431S
TSM
43C
KIA431AS 43A
KIA431BS 43B
KIA431M
SOT-23
43C
KIA431ZM 43Z
KIA431AM 43A
KIA431BM 43B
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KIA431 Series
Revision No : 18
Cathode (K)
Anode (A)
Reference (R)
2.5Vref
+
-
Reference (R)
Anode (A)
Cathode (K)
BLOCK DIAGRAM
ORDERING INFORMATION
Vref Tolerance code Package Code Pb-Free / Halogen-Free
Blank ±2.2% Blank TO-92 P Pb-Free
Z±1.5% F SOT-89 H Halogen-Free
A±1.0% S TSM
B±0.5% T TSV
M SOT-23
KIA431
Pb-Free / Halogen-Free
Packing Specification
Package code
Vref Tolerance code
Packing Specification
TO-92 AT : Taping of AMMO PACK type
SOT-89 RTF : RTF type
TSM / SOT-23 RTK : RTK type
TSV RTK : RTK type
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KIA431 Series
Revision No : 18
ELECTRICAL CHARACTERISTICS (Ta=25℃)
MAXIMUM RATINGS (Ta=25℃)
(Full operating ambient temperature range applies unless otherwise noted.)
CHARACTERISTICS SYMBOL TEST
CIRCUIT TEST CONDITION MIN. TYP. MAX. UNIT
Reference Input
Voltage
KIA431
Vref Figure 1 VKA=Vref , IK=10mA
2.440 2.495 2.550 V
KIA431Z 2.458 2.495 2.532 V
KIA431A 2.470 2.495 2.520 V
KIA431B 2.4825 2.495 2.5075 V
Reference Input Voltage
Deviation Over Temperature Range ΔVref
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
ΔVref/
ΔVKA
Figure 2 IK=10mA
ΔVKA=
10V～Vref
- -1.4 -2.7
mV/V
ΔVKA=
36V～10V - -1.0 -2.0
Reference Input Current Ta=25℃Iref Figure 2 IK=10mA, R1=10kΩ, R2=∞- 1.8 4.0 μA
Ta=Topr - - 6.5
Reference Input Current
Deviation Over Temperature Range ΔIref Figure 2 IK=10mA, R1=10kΩ, R2=∞- 0.8 2.5 μA
Minimum Cathode Current For Regulation Imin Figure 1 VKA=Vref - 0.5 1.0 mA
Off-State Cathode Current Ioff Figure 3 VKA=36V, Vref=0V - 2.6 1000 nA
Dynamic Impedance Zka
Figure 1
(Note 2)
VKA=Vref, IK=1.0～100mA,
f≦1.0kHz - 0.22 - Ω
Note1) Package mounted on 99.5% Alumina 10×8×0.6mm
Note2) Package mounted on a ceramic board. (600㎣×0.8㎜)
CHARACTERISTIC SYMBOL RATING UNIT
Cathode To Anode Voltage VKA 37 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
KIA431
PD
700
mW
KIA431F 800
KIA431M (Note1) 350
KIA431S (Note2) 900
KIA431T 550
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KIA431 Series
Revision No : 18
Input
FIGURE 1-TEST CIRCUIT FOR VKA = Vref
off
I
KA
V
Input
FIGURE 3-TEST CIRCUIT FOR Ioff
FIGURE 2-TEST CIRCUIT FOR VKA > Vref
IK
IK
VKA
VKA
Input
R1
R2
Iref VKA = Vref ( 1+ ) + Iref R1
R1
R2
Max.
Min.
T1 T2
AMBIENT TEMPERATURE
- Vref (Min.)
Ta = T2 - T1
Vref
Vref
Vref Vref = Vref (Max.)
Vref
Example : ΔVref = 8.0mV and slope is positive,
Vref at 25℃=2.495V, ΔTa=70℃
0.008×106
αVref = = 45.8 ppm/℃
70×(2.495)
Note 2: The dynamic impedance Zka is defined as:
ΔVKA
|Zka| = ΔIk
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 ΔVref 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, ΔVref , is defined as:
ΔVref
( ) ×106
ppm Vref at 25℃
α
Vref ( ) =
℃ΔTa
ΔVref ×106
=
ΔTa(Vref at 25℃)
αVref can be positive or negative depending on whether
Vref Min. or Vref Max. occurs at the lower ambient temperature.
2013. 4. 16 5/8
KIA431 Series
Revision No : 18
-2.0
K
I - V
CATHODE VOLTAGE VKA (V) CATHODE VOLTAGE VKA (V)
CATHODE VOLTAGE VKA (V)
-1.0 3.00 1.0 2.0
-100
50
-50
CATHODE CURRENT IK (mA)
0
KA
100
150
4020010
1.0M100k10k 10M1.0k
FREQUENCY f (Hz)
Zka - f
FREQUENCY f (Hz)
G
VO
- f
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)
100
10
0.1
1.0
0
-10
OPEN LOOP VOLTAGE GAIN GVO (dB)
10
800
600
K
KA
0
CATHODE CURRENT I (µA)
-200
2.01.00 3.0-1.0
I - V
K
200
400
V =V
Ta=25 C
KA ref refKA
Ta=25 C
V =V
ref
30
Ta=25 C
K
I =10mA
DYNAMIC IMPEDANCE Zka (Ω)
I =1.0mA~100mA
Ta=25 C
K
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
V
ref
- V
KA
ALLOWABLE POWER
DISSIPATION PD (mW)
0
100
0
PD - Ta
25 50 75 100 125 150 175
200
300
400
500
600
700
800
1000
900
AMBIENT TEMPERATURE Ta
(
C
)
KIA431F
KIA431S
KIA431T KIA431
KIA431M
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KIA431 Series
Revision No : 18
N 1.00
M 0.45 MAX
N
M
C
E
C
E
L
F
F
H
G
K
JA
B
3
21
D
2.30
0.55 MAX
14.00 0.50
0.45
0.85
1.27
1.00
0.45
3.70 MAX
4.80 MAX
4.70 MAX
L
K
J
H
G
F
D
C
B
A
MILLIMETERSDIM
TO-92
+
_
2. ANODE
1. REFERENCE
3. CATHODE
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
KK
B
E
C
L
H
J
J
I
2
1
3
+
_
+
_
+
_
+
_
+
_
1. Cathode 2. Ref 3. Anode
3
21
DIM MILLIMETERS
A
B
D
E
TSV
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
KK
B
E
C
L
H
JJ
I
2
3
15
4
2
3
15
4
+
_
+
_
+
_
+
_
+
_
1. N.C
2. N.C
3. CATHODE
4. REFERENCE
5. ANODE
DIM
A
B
D
E
G
H
K
4.70 MAX
2.50 0.20
1.70 MAX
0.45+0.15/-0.10
4.25 MAX
1.50 0.10
0.40 TYP
1.75 MAX
0.75 MIN
0.5+0.10/-0.05
SOT-89
C
J
G
D
123
2. ANODE
AC
K
J
F
MILLIMETERS
H
1. REFERENCE
3. CATHODE
B
E
FF
D
+
_
+
_
Heat Sink is common to (ANODE)
2
2013. 4. 16 7/8
KIA431 Series
Revision No : 18
DIM MILLIMETERS
SOT-23
A
B
C
D
E
2.93 0.20
1.30+0.20/-0.15
0.40+0.15/-0.05
2.40+0.30/-0.20
G 1.90
H
J
K
L
M
N
0.95
0.13+0.10/-0.05
0.00 ~ 0.10
0.55
Q 0.1 MAX
0.20 MIN
1.00+0.20/-0.10
M
J
K
E
1
23
H
G
A
N
C
B
D
1.30 MAX
LL
PP
P7
+
_
Q
1. Cathode 2. Ref 3. Anode
3
21
2013. 4. 16 8/8
KIA431 Series
Revision No : 18
PRECAUTION FOR USE
Lead-Free Soldering Condition.
Elements mounting styles of electronic devices are gaining in further diversification over recent years, and needs for
components are all the more expanding in varieties. Especially, surface mounting is steadily penetrating into industrial
segments as a world-wide popular technical trend. Although exposure to high temperature is inevitable during soldering
we recommend limiting the soldering temperature to low levels as shown in figure for the sake of retaining inherent
excellent reliability.
1. When employing solder reflow method
1) Soldering Condition
ⓐStandard Condition : 250℃(Temperature), 10±1sec. (Time)
ⓑPeak Condition : 260±3℃
2) Recommend temperature profile
3) Precautions on heating method
When resin in kept exposed to high temperature for a long time, device reliability may be marred.
Therefore, it is essential to complete soldering in the shortest time possible to prevent temperature of resin from rising.
2. When employing halogen lamps or infrared-ray heaters
When halogen lamps or infrared-ray heaters are used, avoid direct irradiation onto resin surfaces; such devices
cause extensive localized temperature rise.
※Please keep a reflow solder operating when Surface Mount Package s Soldering.
Time
(
sec
)
150 C
180 C
Peak : 260 3 C
Temperature ( C)
230 C
250 C
+
_
Preheating Zone
90 30sec
+
_
Reflow Zone
35 5sec
+
_
10 1sec
+
_
[Lead-Free Soldering Temperature Profile]
