LL431NSK-AE3-R [UTC]
PROGRAMMABLE PRECISION REFERENCE; 可编程精密基准
| 型号： | LL431NSK-AE3-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | PROGRAMMABLE PRECISION REFERENCE |
| 文件： | 总5页 (文件大小：177K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LL431
LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE PRECISION
REFERENCE
DESCRIPTION
The UTC LL431 is a three-terminal adjustable regulator with a
guaranteed thermal stability over applicable temperature ranges.
The output voltage may be set to any value between VREF
(approximately 2.5V) and 36 V with two external resistors. It
can be used in provides very wide applications including shunt
regulator, series regulator, switching regulator, voltage reference
and others.
FEATURES
*Programmable output Voltage to 36V.
*Low dynamic output impedance 0.2Ω.
*Sink current capability of 1.0 to 100mA.
*Equivalent full-range temperature coefficient of 50ppm/ °C
typical for operation over full rated operating temperature range.
ORDERING INFORMATION
Ordering Number
Pin Assignment
Packing
Package
Lead Free
Halogen Free
1
K
R
2
R
K
3
A
A
LL431K-AE3-R
LL431NSK-AE3-R
LL431G-AE3-R
SOT-23
SOT-23
Tape Reel
Tape Reel
LL431NSG-AE3-R
Note: Pin Code: K: Cathode
A: Anode
R: Reference
LL431G-AE3-R
(1) R: Tape Reel, T: Tube
(2) AE3: SOT-23
(1)Packing Type
(2)Package Type
(3)Halogen Free
(3) G: Halogen Free, K: Lead Free
MARKING
PACKAGE
MARKING
SOT-23
SOT-23
(LL431NS)
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
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LL431
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
CATHODE
REFERENCE
CATHODE (K)
REFERENCE (R)
2.5V VREF
ANODE(A)
ANODE
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LL431
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
PARAMETER
SYMBOL
VKA
RATINGS
37
UNIT
V
Cathode Voltage
Cathode Current Range(Continuous)
Reference Input Current
IKA
-100 ~ +150
-0.05 ~ +10
300
mA
mA
mW
°C
°C
°C
IREF
Power Dissipation
PD
Operating Junction Temperature
Operating Ambient Temperature
Storage Temperature
TJ
+150
TOPR
TSTG
-40 ~ +85
-65 ~ +150
Note Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VKA
MIN
VREF
1
TYP
MAX
36
UNIT
V
Cathode Voltage
Cathode Current
IKA
100
mA
ELECTRICAL CHARACTERISTICS (TC= 25℃, unless otherwise specified.)
PARAMETER
Reference Input Voltage
SYMBOL
VREF
TEST CONDITIONS
VKA=VREF,IKA=10mA ±0.5% 2.483 2.495 2.507
KA=VREF,IKA=10mA
0°C≦Ta≦70°C
MIN TYP MAX UNIT
V
Deviation of reference Input Voltage Over
temperature
V
ΔVREF/ΔT
4.5
17
mV
Ratio of Change in Reference Input
Voltage to the Change in Cathode Voltage
Reference Input Current
ΔVKA=10V~VREF
ΔVKA=36V~10V
IKA=10mA, R1=10kΩ, R2=∞
KA=10mA, R1=10kΩ, R2=∞
Ta =full Temperature
-1.0
-2.7
ΔVREF/ΔVKA IKA=10mA
mV/V
μA
-0.5 -2.0
IREF
1.5
4
Deviation of Reference Input Current Over
Full Temperature Range
I
ΔIREF/ΔT
0.4
1.2
μA
Minimum Cathode Current for Regulation
Off-State Cathode Current
IKA(MIN) VKA=VREF
0.15
1.0
mA
IKA(OFF) VKA=36V, VREF=0
0.05
0.15
μA
V
KA=VREF, IKA=1 to 100mA
Dynamic Impedance
ZKA
0.5
Ω
f≤1.0kHz
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LL431
LINEAR INTEGRATED CIRCUIT
■ TYPICAL CHARACTERISTICS
Cathode Current vs. Cathode Voltage
Cathode Current vs. Cathode Voltage
150
800
125
100
75
Ta=25°C
KA=VREF
V
Ta=25°C
600
400
200
0
V
KA=VREF
50
IKA(MIN)
25
0
-25
-50
-75
-100
-200
-2
-1
0
1
2
3
-2
-1
0
1
2
3
Cathode Voltage (V)
Cathode Voltage (V)
Change in Reference Input Voltage vs.
Cathode Voltage
Pulse Response
7
6
0
Ta=25°C
-5
IKA=100mA
Ta=25°C
-10
-15
-20
-25
-30
-35
-40
5
4
3
2
1
0
-50
-1
0
5
10
15
20
25
30
35
40
-1
0
1
2
3
4
5
6
7
Time (μs)
Cathode Voltage (V)
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LL431
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
For VKA=VREF
For VKA≧VREF
For IKA(OFF)
APPLICATION CIRCUIT
VIN
VIN
VoUT
VoUT
IN
VIN
VoUT
OUT
UTC7805
COMMON
R1
R1
R1
VREF
VREF
R2
VREF
R2
R2
UTC LL431
UTC LL431
UTC LL431
VOUT=(1+R1/R2)*VREF
VOUT=(1+R1/R2)*VREF
VOUT=(1+R1/R2)*VREF
Shutdown Regulator
Output Control of a Three
-Terminal Fixed Regulator
Higher-current Shunt Regulator
Constant-current Sink
Current Limiting or Current Source
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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