SL431A [AUK]
Programmable Voltage Reference; 可编程电压参考
| 型号： | SL431A |
| 厂家： | 
AUK CORP |
| 描述： | Programmable Voltage Reference |
| 文件： | 总6页 (文件大小：356K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SL431x
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
Symbol
0.50 Max.
Functional block diagram
Cathode
Reference
+
-
V
=2.495V
REF
1.27 Typ.
1.27 Typ.
1
2
3
Anode
PIN Connections
1. Reference
2. Anode
3. Cathode
KSD-I0A004-000
1
SL431x
Absolute maximum ratings
Characteristic
Cathode to Anode voltage
[Ta=25℃]
Unit
V
Symbol
VKA
IK
Rating
37
Cathode current
150
mA
mA
mW
℃
Reference input current
Power Dissipation
Iref
10
PD
625
Junction Temperature
TJ
150
Operating temperature range
Storage temperature range
Topr
Tstg
-40 ~ +85
-55 ~ +150
℃
℃
Recommended operating conditions
Rating
Characteristic
Symbol
Unit
Min.
Max.
36
Cathode to Anode voltage
Cathode current
VKA
IK
Vref
V
1
100
mA
Electrical Characteristics (Ta=25℃, unless otherwise noted.)
Characteristic
Symbol
Condition
Min. Typ. Max. Unit
SL431B
SL431A
2.482
2.508
Reference voltage (Fig.1)
Vref
VKA=Vref, IK=10mA
2.495
V
mV
mV/V
µΑ
2.470
2.520
Reference input voltage
deviation over temperature
(Fig.1, Note1,2)
Ratio of delta reference input
voltage to delta cathode
voltage (Fig.2)
V
KA=Vref , IK=10mA
-
7
30
∆Vref
@ -40˚C ≤ Ta ≤ 85˚C
∆Vref
△VKA=VKA(10V) –Vref
-
-
-1.2
-0.7
-2.7
-2.0
IK=10mA
ref ≤ VKA ≤ 36V
V
∆VKA
△VKA=VKA(36V)-VKA(10V)
IK=10mA
R1=10KΩ, R2=∞
Reference current (Fig.2)
Iref
-
-
-
-
1.8
0.4
4.0
2.5
IK=10mA
Reference input current
deviation over temperature
(Fig.2, Note 1,2)
µΑ
∆Iref
R1=10KΩ, R2=∞
@ -40˚C ≤ Ta ≤ 85˚C
Minimum cathode current
for regulation
IK(MIN)
VKA=Vref
0.35
2.7
1.0
mΑ
nA
Off-state cathode current
(Fig.3)
IK(off)
VKA=36V, Vref=0V
1000
Dynamic impedance
(Fig.1, Note3)
VKA=Vref, f ≤ 1.0KHz
1.0mA ≤ IK ≤ 100mA
ZKA
-
0.15
0.5
Ω
KSD-I0A004-000
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SL431x
Fig. 2 Test circuit for VKA>Vref
Input VKA
Fig. 1 Test circuit for VKA=Vref
Input VKA
Fig. 3 Test circuit for IK(off)
Input VKA
IK(off)
IK
IK
R1
R2
Iref
Vref
R
R2
=
× (1+ 1 ) + Iref × R1
VKA Vref
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:
∆Vref
(
×106 )
ppm
(
= 25℃)
∆Ta
Vref Ta
α
(
) =
℃
Vref
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
0.03
△Ta = 125℃
(
)×106
ppm
℃
2.495
αVref
(
) =
= 96ppm /℃
125
3. The dynamic impedance ZKA is defined as:
∆VKA
∆IK
ΖKA
=
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:
R1
R 2
'
ΖKA = ΖKA ×(1+
)
KSD-I0A004-000
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SL431x
Electrical Characteristics Curves (Continue)
Fig.4 IK vs VKA (1)
Fig.5 IK vs VKA (2)
150
4.0
3.0
2.0
1.0
VKA=Vref
125
VKA=Vref, Ta=25˚C
Ta=25˚C
100
75
50
25
0
-25
-50
-75
-100
0.0
-0.2
-2
-1
0
1
2
3
-1
0
1
2
3
Cathode Voltage VKA [V]
Cathode Voltage VKA [V]
Fig.7 ΔVref/ΔVKA vs Ta
Fig.6 IK(off) vs VKA
0.0
2.0
Vref=0V, Ta=25°C
-0.1
1.5
1.0
-0.2
-0.3
-0.4
-0.5
0.5
0.0
V
ref ≤ VKA ≤ 36V
IK=10mA
-50
0
-25
0
10
20
30
40
50
25
50
75
100
Cathode Voltage VKA [V]
Ambient Temperature Ta [˚C]
Fig.8 Vref vs Ta
Fig.9 PD vs Ta
2.545
2.525
1000
800
VKA=Vref , Iref=10mA
Vref(max)
2.505
2.485
600
400
Vref(typ)
2.465
2.445
200
0
Vref(min)
-25
0
25
50
-50
25
50
75
100
0
75
100
150
125
Ambient Temperature Ta [˚C]
Ambient Temperature Ta [˚C]
KSD-I0A004-000
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SL431x
Electrical Characteristics Curves
Fig.10 Pulse Response
7
Ta=25˚C
6
5
220Ω
Output
GND
Input
4
3
2
B
A
f=10KHz
50Ω
Output
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)
Fig.13 Pulse Response (Magnify B of Fig.10)
7
6
5
7
Ta=25˚C
Ta=25˚C
6
5
Input
Input
4
3
2
4
3
2
Output
Output
1
0
1
0
-1
-1
0
1
2
3
4
5
0
1
2
3
4
5
t – Time [μs]
t – Time [μs]
KSD-I0A004-000
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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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