KN431/KNF431
Programmable Voltage Reference
Description
The KN431 series are 3-terminal precision shunt regulators that are programmable over a wide voltage range of
2.495V to 36V with ±0.3%, ±0.5%, ±1.0% tolerance. The KN431 series have a low dynamic impedance of 0.15Ω.
These features make the KN431 series an excellent replacement for zener diodes in numerous applications circuits
that require a precision reference voltage.
Features
Programmable output voltage from 2.495V to 36V
Voltage reference tolerance : ±0.3%, ±0.5%, ±1.0%
Cathode current capability of 1mA to 100mA
ESD ratings : 2000V (HBM), 200V (MM)
Pin Assignment
Apply Device : KN431xF
Apply Device : KN431xS
Apply Device : KNF431xS
Apply Device : KN431xN
Apply Device : KN431x
Apply Device : KN431xM
[ K : Cathode, A: Anode, R : Reference ]
AUK Dalian
1
KN431/KNF431
Symbol
Functional block diagram
Ordering Information
Vref Tolerance
PKG Type
TO-92
TO-92M
±1%
SOT-23
SOT-23
SOT-25
SOT-89
TO-92
TO-92M
±0.5%
SOT-23
SOT-23
SOT-25
SOT-89
±0.3%
SOT-23
SOT-23
1) KN431xS Pin Connection : (1) Cathode, (2) Reference, (3) Anode
2) KNF431xS Pin Connection : (1) Reference, (2) Cathode, (3) Anode
3)
□
: Year & Week Code
4)
△ :
Machine Code [SOT-23 PKG.]
•
Da Lian
Device Name
KN431A
KN431AM
1)
Marking
KN431 A•
KN431 A•
4GA□
3)
△•
4KA□
3)
△•
N4A□
3)
•
KN431A•
KN431 B•
KN431B•
4GB□
3)
△•
4KB□
3)
△•
N4B□
3)
•
KN431B•
4GC□
3)
△•
4KC□
3)
△•
KN431AS
2)
KNF431AS
KN431AN
KN431AF
KN431B
KN431BM
1)
KN431BS
2)
KNF431BS
KN431BN
KN431BF
1)
KN431CS
2)
KNF431CS
AUK Dalian
2
KN431/KNF431
Absolute maximum ratings
Characteristic
Cathode to Anode voltage
Cathode current Range (Continuous)
Reference input current Range
SOT-23
SOT-25
Power Dissipation
SOT-89
TO-92
TO-92M
Junction Temperature
Operating temperature range
Storage temperature range
[Ta=25℃]
Symbol
V
KA
I
K
I
ref
P
D
(Note1)
P
D
(Note1)
P
D
(Note1)
P
D
(Note2)
P
D
(Note2)
T
J
T
opr
T
stg
Rating
37
-100~150
-0.05~10
350
400
500
700
400
150
-40 ~ +85
-55 ~ +150
Unit
V
mA
mA
mW
℃
℃
℃
Note 1 : Mounted on a glass epoxy PCB board (25.4 × 25.4mm).T
A
=25℃
Note 2 : T
A
=25℃
Recommended operating conditions
Characteristic
Cathode to Anode voltage
Cathode current
Symbol
V
KA
I
K
Rating
Min.
Max.
V
ref
1
36
100
Unit
V
mA
Electrical Characteristics
Characteristic
Reference voltage (Fig.1)
Reference input voltage
deviation over temperature
(Fig.1, Note1,2)
Ratio of delta reference input
voltage to delta cathode
voltage (Fig.2)
Reference current (Fig.2)
Reference input current
deviation over temperature
(Fig.2, Note 1,2)
Minimum cathode current
for regulation
Off-state cathode current (Fig.3)
Dynamic impedance (Fig.1, Note3)
(Ta=25℃, unless otherwise noted.)
Condition
V
KA
=V
ref
, I
K
=10mA
KN431C
KN431B
KN431A
Symbol
V
ref
Min.
2.487
2.482
2.482
-
Typ.
2.495
Max.
2.503
2.508
2.520
30
Unit
V
△V
ref
△V
ref
————
△V
KA
I
ref
V
KA
=V
ref
, I
K
=10mA
@ -40°C ≤ Ta ≤ 85°C
I
K
=10mA
V
ref
≤V
KA
≤36V
7
mV
-
-1.0
-2.7
mV/V
I
K
=10mA, R1=10KΩ, R2=∞
I
K
=10mA, R1=10KΩ, R2=∞
@ -40°C ≤ Ta ≤ 85°C
V
KA
=V
ref
V
KA
=36V, V
ref
=0V
V
KA
=V
ref
, f ≤ 1.0KHz
1.0mA ≤ I
K
≤ 100mA
AUK Dalian
-
1.8
4.0
μΑ
△I
ref
I
K(MIN)
I
K(off)
Z
KA
-
-
-
-
0.4
0.35
2.7
0.15
2.5
1.0
1000
0.5
μΑ
mΑ
nA
Ω
3
KN431/KNF431
AUK Dalian
4
KN431/KNF431
Electrical Characteristic Curves
AUK Dalian
5
嵌入式系统
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