AUK SL431X

SL431x
ㅁ
Semiconductor
Programmable Voltage Reference
Description
The SL431 series are 3-terminal precision shunt regulators that are programmable over a wide voltage range of
2.495V to 36V with ±0.5%, ±1.0% tolerance. The SL431 series have a low dynamic impedance of 0.15Ω. These
features make the SL431 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 : ±0.5%, ±1.0%
• Cathode current capability of 1mA to 100mA
Ordering Information
Type NO.
Marking
Package Code
SL431x
SL431□
TO-92
□ : Grade => A:±1% , B:±0.5%
Outline Dimensions ( Unit : mm )
4.40~4.80
4.40~4.80
Symbol
13.50~14.50
0.50 Max.
Functional block diagram
Cathode
Reference
+
-
1.27 Typ.
1.27 Typ.
2
3
Anode
PIN Connections
1. Reference
2. Anode
3. Cathode
0.45 Max.
3.40~3.60
1
VREF =2.495V
KSD-I0A004-000
1
SL431x
Absolute maximum ratings
[Ta=25℃]
Characteristic
Symbol
Rating
Unit
VKA
37
V
Cathode current
IK
150
mA
Reference input current
Iref
10
mA
Power Dissipation
PD
625
mW
Junction Temperature
TJ
150
℃
Operating temperature range
Topr
-40 ~ +85
℃
Storage temperature range
Tstg
-55 ~ +150
℃
Cathode to Anode voltage
Recommended operating conditions
Characteristic
Rating
Symbol
Cathode to Anode voltage
Cathode current
Unit
Min.
Max.
VKA
Vref
36
V
IK
1
100
mA
Electrical Characteristics (Ta=25℃, unless otherwise noted.)
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)
Symbol
Condition
Vref
VKA=Vref, IK=10mA
∆Vref
VKA=Vref , IK=10mA
@ -40˚C ≤ Ta ≤ 85˚C
∆Vref
∆VKA
Iref
Min. Typ. Max.
SL431B
2.482
SL431A
2.470
2.495
2.508
2.520
Unit
V
-
7
30
△VKA=VKA(10V) –Vref
-
-1.2
-2.7
△VKA=VKA(36V)-VKA(10V)
-
-0.7
-2.0
IK=10mA
R1=10KΩ, R2=∞
-
1.8
4.0
µΑ
IK=10mA
R1=10KΩ, R2=∞
@ -40˚C ≤ Ta ≤ 85˚C
-
0.4
2.5
µΑ
IK=10mA
Vref ≤ VKA ≤ 36V
mV
mV/V
Reference input current
deviation over temperature
(Fig.2, Note 1,2)
∆Iref
Minimum cathode current
for regulation
IK(MIN)
VKA=Vref
-
0.35
1.0
mΑ
Off-state cathode current
(Fig.3)
IK(off)
VKA=36V, Vref=0V
-
2.7
1000
nA
Dynamic impedance
(Fig.1, Note3)
ZKA
VKA=Vref, f ≤ 1.0KHz
1.0mA ≤ IK ≤ 100mA
-
0.15
0.5
Ω
KSD-I0A004-000
2
SL431x
Fig. 2 Test circuit for VKA>Vref
Fig. 1 Test circuit for VKA=Vref
Input
Input
VKA
IK
VKA
Fig. 3 Test circuit for IK(off)
Input
IK(off)
IK
R1
VKA
Iref
R2
Vref
V KA = V ref × (1 +
R1
) + I ref × R 1
R2
Note.
1. Ambient temperature range: TLOW = -40℃, THigh = 85℃
2. The deviation parameters △Vref and △Iref are defined as the difference between the maximum value and minimum value
obtained over the full operating ambient temperature range that applied.
∆Vref = Vref Max – Vref Min
∆Ta = T2 – T1
Ambient Temperature
The average temperature coefficient of the reference input voltage, αVref is defined as:
∆V ref
× 10 6 )
ppm
V ref (T a = 25℃)
α V ref (
)=
℃
∆T a
(
αVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature, refer to
Fig. 8
Example : △Vref = 30mV and the slope is positive,
△Vref @ 25℃ = 2.495V
△Ta = 125℃
0.03
(
) × 10 6
ppm
2.495
αVref (
)=
= 96ppm / ℃
℃
125
3. The dynamic impedance ZKA is defined as:
Ζ KA =
∆VKA
∆I K
When the device is operating with two external resistors, R1 and R2, (refer to Fig.2) the total dynamic impedance of the circuit
is given by:
Ζ KA ' = Ζ KA × (1 +
KSD-I0A004-000
R1
)
R2
3
SL431x
Electrical Characteristics Curves (Continue)
Fig.4 IK vs VKA (1)
150
4.0
100
Cathode current IK [mA]
VKA=Vref
Ta=25˚C
125
Cathode current IK[mA]
Fig.5 IK vs VKA (2)
75
50
25
0
-25
-50
VKA=Vref, Ta=25˚C
3.0
2.0
1.0
0.0
-75
2.0
-1
0
2
1
1
2
Cathode Voltage VKA [V]
Fig.6 IK(off) vs VKA
Fig.7 ΔVref/ΔVKA vs Ta
1.5
1.0
I 0.5
0.0
10
30
20
40
50
3
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
-50
Vref ≤ VKA ≤ 36V
IK=10mA
-25
0
25
50
75
Cathode Voltage VKA [V]
Ambient Temperature Ta [˚C]
Fig.8 Vref vs Ta
Fig.9 PD vs Ta
2.545
100
1000
VKA=Vref , Iref=10mA
Power dissipation PD [mW]
Reference input voltage Vref [V]
0
Cathode Voltage VKA [V]
Vref=0V, Ta=25°C
0
-0.2
-1
3
cathode voltag ΔVref /ΔVKA [mV/V]
Off-state cathode current IK(off) [µA]
-2
Ratio of delta reference input voltage to delta
-100
2.525
Vref(max)
2.505
Vref(typ)
2.485
2.465
2.445
-50
Vref(min)
-25
0
25
50
75
100
800
600
400
200
0
0
25
50
75
100
125
150
Ambient Temperature Ta [˚C]
Ambient Temperature Ta [˚C]
KSD-I0A004-000
4
SL431x
Electrical Characteristics Curves
Fig.10 Pulse Response
Input and output voltage – V
7
Ta=25˚C
6
220Ω
Input
5
4
A
3
B
Output
f=10KHz
Output
50Ω
2
GND
1
0
Fig.11 Test circuit for Fig. 10
-1
0
2
4
6
8
10
t – Time [μs ]
Fig.12 Pulse Response (Magnify A of Fig.10)
7
Ta=25˚C
6
Input and output voltage – V
Input and output voltage – V
7
Fig.13 Pulse Response (Magnify B of Fig.10)
Input
5
4
Output
3
2
1
0
-1
Ta=25˚C
6
Input
5
4
Output
3
2
1
0
-1
0
1
2
3
4
5
t – Time [μs ]
0
1
2
3
4
5
t – Time [μs ]
KSD-I0A004-000
5
SL431x
The AUK Corp. products are intended for the use as components in general electronic
equipment (Office and communication equipment, measuring equipment, home
appliance, etc.).
Please make sure that you consult with us before you use these AUK Corp. products
in equipments which require high quality and / or reliability, and in equipments which
could have major impact to the welfare of human life(atomic energy control, airplane,
spaceship, transportation, combustion control, all types of safety device, etc.). AUK
Corp. cannot accept liability to any damage which may occur in case these AUK Corp.
products were used in the mentioned equipments without prior consultation with AUK
Corp..
Specifications mentioned in this publication are subject to change without notice.
KSD-I0A004-000
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