UTC LL431G-AF5-R Programmable precision reference Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LL431
LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE PRECISION
REFERENCE
3
1
2
„
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.
„
4
5
1
2
3
1
SOT-25
SOT-89
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.
„
SOT-23
DESCRIPTION
1
SOP-8
TO-92
ORDERING INFORMATION
Ordering Number
Pin Assignment
Package
Lead Free
Halogen Free
1 2 3 4 5 6
LL431K-AB3-R
LL431G-AB3-R
SOT-89
R A K
LL431K-AE3-R
LL431G-AE3-R
SOT-23
K R A
LL431NSL-AE3-R
LL431NSG-AE3-R
SOT-23
R K A
LL431K-AF5-R
LL431G-AF5-R
SOT-25
X X K R A
LL431K-S08-R
LL431G-S08-R
SOP-8
K A A X X A
LL431K-T92-B
LL431G-T92-B
TO-92
R A K
LL431K-T92-K
LL431G-T92-K
TO-92
R A K
LL431K-T92-R
LL431G-T92-R
TO-92
R A K
Note: Pin Code: K: Cathode
A: Anode
R: Reference
X: No Connection
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
7
A
-
8
R
-
Packing
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Box
Bulk
Tape Reel
1 of 5
QW-R121-020,E
LL431
„
LINEAR INTEGRATED CIRCUIT
MARKING
PACKAGE
MARKING
SOT-23
SOT-23
(LL431NS)
4
5
SOT-25
LL431
1
„
2
G: Halogen Free
K: Lead Free
3
BLOCK DIAGRAM
CATHODE
REFERENCE
CATHODE (K)
REFERENCE (R)
2.5V VREF
ANODE(A)
ANODE
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 5
QW-R121-020,E
LL431
„
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
PARAMETER
RATINGS
UNIT
Cathode Voltage
37
V
Cathode Current Range(Continuous)
-100 ~ +150
mA
Reference Input Current
-0.05 ~ +10
mA
SOT-89
500
mW
SOT-23/ SOT-25
300
mW
Power Dissipation
PD
SOP-8
600
mW
TO-92
770
mW
Junction Temperature
TJ
+150
°C
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-65 ~ +150
°C
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.
„
SYMBOL
VKA
IKA
IREF
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VKA
IKA
Cathode Voltage
Cathode Current
„
RATINGS
VREF ~ 36
1 ~ 100
UNIT
V
mA
ELECTRICAL CHARACTERISTICS (TC= 25℃, unless otherwise specified.)
PARAMETER
Reference Input Voltage
Deviation of reference Input Voltage
Over temperature
Ratio of Change in Reference Input
Voltage to the Change in Cathode Voltage
Reference Input Current
Deviation of Reference Input Current Over
Full Temperature Range
Minimum Cathode Current for Regulation
Off-State Cathode Current
Dynamic Impedance
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VREF
VKA=VREF,IKA=10mA
±0.5% 2.483 2.495 2.507
V
VKA=VREF,IKA=10mA
ΔVREF/ΔT
4.5
17
mV
0°C≦TA≦70°C
-1.0
-2.7
ΔVKA=10V~VREF
ΔVREF/ΔVKA IKA=10mA
mV/V
ΔVKA=36V~10V
-0.5 -2.0
IREF
IKA=10mA, R1=10kΩ, R2=∞
1.5
4
μA
IKA=10mA, R1=10kΩ, R2=∞
ΔIREF/ΔT
0.4
1.2
μA
TA =full Temperature
IKA(MIN) VKA=VREF
0.15
mA
IKA(OFF) VKA=36V, VREF=0
0.05
1.0
μA
VKA=VREF, IKA=1 to 100mA
0.15
0.5
Ω
ZKA
f≤1.0kHz
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 5
QW-R121-020,E
LL431
„
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
For VKA=VREF
„
For VKA≧ VREF
For IKA(OFF)
APPLICATION CIRCUIT
VoUT
VIN
VIN
VIN
IN
UTC7805
COMMON
R1
R1
VREF
VREF
R2
R2
UTC LL431
UTC LL431
VOUT=(1+R1/R2)*VREF
Shutdown Regulator
www.unisonic.com.tw
VREF
R2
VOUT=(1+R1/R2)*VREF
Output Control of a Three
-Terminal Fixed Regulator
UNISONIC TECHNOLOGIES CO., LTD
R1
UTC LL431
VOUT=(1+R1/R2)*VREF
Constant-current Sink
VoUT
VoUT
OUT
Higher-current Shunt Regulator
Current Limiting or Current Source
4 of 5
QW-R121-020,E
LL431
LINEAR INTEGRATED CIRCUIT
■ TYPICAL CHARACTERISTICS
Cathode Current vs. Cathode Voltage
Cathode Current vs. Cathode Voltage
150
800
TA=25°C
VKA=VREF
100
TA=25°C
VKA=VREF
600
Cathode Current (μA)
Cathode Current (mA)
125
75
50
25
0
-25
-50
400
IKA(MIN)
200
0
-75
-100
-2
-1
0
1
2
-200
-2
3
-1
0
Cathode Voltage (V)
Change in Reference Input Voltage vs.
Cathode Voltage
3
Pulse Response
TA=25°C
-5
6
IKA=100mA
TA=25°C
-10
-15
-20
-25
-30
-35
-40
-50
2
7
Input and Output Voltage (V)
Change In Reference Input Voltage (mV)
0
1
Cathode Voltage (V)
5
4
3
2
1
0
0
5
10
15
20
25
30
35
40
Cathode Voltage (V)
-1
-1
0
1
2
3
4
5
6
7
Time (μs)
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 5
QW-R121-020,E
Similar pages