Datasheet

UNISONIC TECHNOLOGIES CO., LTD
TL431L
LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE PRECISION
REFERENCE
„
DESCRIPTION
The UTC TL431L 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 20V with two external resistors. It provides
very wide applications, including shunt regulator, series regulator,
switching regulator, voltage reference and others.
„
FEATURES
*Programmable Output Voltage to 20V.
*Low Dynamic Output Impedance 0.2Ω.
*Sink Current Capability of 1.0 ~ 100mA.
*Equivalent full-Range Temperature Coefficient of 50ppm/ °C Typical
for Operation over full Rated Operating Temperature Range.
„
ORDERING INFORMATION
Ordering Number
Pin Assignment
Package
Lead Free
Halogen Free
1 2 3 4 5 6
TL431LK-AB3-R
TL431LG-AB3-R
SOT-89
R A K - - TL431LK-AE3-R
TL431LG-AE3-R
SOT-23
K R A - - TL431LK-AF5-R
TL431LG-AF5-R
SOT-25
X X K R A TL431LK-S08-R
TL431LG-S08-R
SOP-8
K A A X X A
TL431LK-S08-T
TL431LG-S08-T
SOP-8
K A A X X A
TL431LK-SM1-R
TL431LG-SM1-R
MSOP-8
K X X X X A
TL431LK-SM1-T
TL431LG-SM1-T
MSOP-8
K X X X X A
TL431LK-T92-B
TL431LG-T92-B
TO-92
R A K - - TL431LK-T92-K
TL431LG-T92-K
TO-92
R A K - - TL431LK-T92-R
TL431LG-T92-R
TO-92
R A K - - Note: Pin Code: K: Cathode
A: Anode
R: Reference
X: No Connection
„
7
A
A
X
X
-
8
R
R
R
R
-
Packing
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tube
Tape Reel
Tube
Tape Box
Bulk
Tape Reel
MARKING (SOT-23/SOT-25)
SOT-23
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
SOT-25
1 of 6
QW-R103-014.G
TL431L
„
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R103-014.G
TL431L
„
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Cathode Voltage
VKA
20
V
Cathode Current Range (Continuous)
IKA
-100 ~ +150
mA
Reference Input Current
IREF
-0.05 ~ +10
mA
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.
„
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Cathode Voltage
Cathode Current
„
SYMBOL
VKA
IKA
MIN
VREF
1
TYP
MAX
20
100
UNIT
V
mA
ELECTRICAL CHARACTERISTICS (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
Reference Input Voltage
VREF
Deviation of Reference Input Voltage
ΔVREF/ΔT
Over temperature (note 1)
Ratio of Change in Reference Input
Voltage to the Change in Cathode
ΔVREF /ΔVKA
Voltage
Reference Input Current
IREF
Deviation of Reference Input Current
ΔIREF/ΔT
Over Full Temperature Range
Minimum Cathode Current for Regulation
IKA(MIN)
Off-State Cathode Current
IKA(OFF)
TEST CONDITIONS
VKA=VREF, IKA=10mA
VKA=VREF, IKA=10mA
0≤TA≤70
IKA=10mA
TYP
2.50
MAX
2.550
UNIT
V
4.5
17
mV
ΔVKA=10V~VREF
-1.0
-2.7
ΔVKA=20V~10V
-0.5
-2.0
1.5
4
μA
0.4
1.2
μA
0.45
0.05
1.0
1.0
mA
μA
0.15
0.5
Ω
IKA=10mA, R1=10kΩ, R2=∞
IKA=10mA, R1=10kΩ, R2=∞
TA=full Temperature
VKA=VREF
VKA=20V, VREF=0
VKA=VREF, IKA=1 ~ 100mA
Dynamic Impedance
ZKA
f≤1.0kHz
Remark: Reference voltage of ±1% tolerance is also available per customer’s request.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
2.450
mV/V
3 of 6
QW-R103-014.G
TL431L
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
„
APPLICATION CIRCUIT
VIN
VOUT
IOUT
VIN
IOUT
VOUT
RCL
Rs
Rs
UTC TL431L
IOUT=VREF/RS
UTC TL431L
RS=VREF/RCL
Constant-Current Sink
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Current Limiting or Current Source
4 of 6
QW-R103-014.G
TL431L
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
„
Cathode Current vs. Cathode Voltage
TA=25℃
VKA=VREF
125
TA=25℃
VKA=VREF
100
600
Cathode Current (μA)
Cathode Current (mA)
Cathode Current vs. Cathode Voltage
800
75
50
25
0
-25
-50
400
IKA(min)
200
0
-75
-100
-2
-200
-1
0
1
2
3
-1
-2
Cathode Voltage (V)
Change in Reference Input Voltage vs.
Cathode voltage
0
Input and Output Voltage (V)
-10
-15
-20
-25
-30
5
4
3
2
IKA=100mA
TA=25℃
1
0
0
5
10
15
20
25
30
35
40
0
1
Cathode Voltage (V)
Voltage Amplification (dB)
Impedance (Ω)
5
6
7
60
1
0
50
40
30
20
10
0
-1
10
4
Small Signal Voltage Amplification vs. Frequency
2
10
3
70
TA=25℃
IKA=0mA ~ 100mA
10
2
Time (μs)
Dynamic Impedance vs. Frequency
10
3
6
-40
10
2
TA=25℃
7
-35
1
Pulse Response
-5
Change In Reference INput
Voltage (mV)
0
Cathode Voltage (V)
3
10
4
10
5
10
6
10
7
Frequency (Hz)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
-10
3
10
TA=25℃
IKA=10mA
10
4
10
5
10
6
10
7
Frequency (Hz)
5 of 6
QW-R103-014.G
TL431L
LINEAR INTEGRATED CIRCUIT
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
6 of 6
QW-R103-014.G
Similar pages