Datasheet

UNISONIC TECHNOLOGIES CO., LTD
TL432
1.25V PRECISION
ADJUSTABLE SHUNT
REFERENCE REGULATORS
LINEAR INTEGRATED CIRCUIT
4
3
5
2
1
1
SOT-23

3
SOT-25
DESCRIPTION
The UTC TL432 is a three-terminal adjustable shunt regulator
highly accurate 1.25V band gap reference with 0.5%, 1% tolerance.
The device offers thermal stability, wide operating current (50mA)
and an extended temperature range of 0 to 85C for operation in
power supply applications. The UTC TL432 offers a wide operating
voltage range of up to 12V and is an excellent choice for voltage
reference requirements in an isolated feedback circuit for 3.0V ~
3.3V switching mode power supplies. The tight tolerance guarantees
a lower design cost for the power supply manufacturer by virtually
eliminating the need for an extra power supply manufacturing
process of the power supply.

2
1
SOT-89
SOP-8
1
TO-92
FEATURES
*Temperature-Compensated:50ppm/°C
*Internal amplifier with 50mA capability
*Nominal temperature range extended to 85°C
*Low frequency dynamic output impedance: <150Ω
*Low output noise

ORDERING INFORMATION
Ordering Number
Pin Assignment
Package
Lead Free
Halogen Free
1 2 3 4 5 6
TL432G-AE3-R
SOT-23
K R A - - TL432G-AB3-R
SOT-89
R A K - - TL432G-AF5-R
SOT-25
X X K R A TL432L-T92-B
TL432G-T92-B
TO-92
R A K - - TL432L-T92-K
TL432G-T92-K
TO-92
R A K - - TL432G-S08-R
SOP-8
K A A X X A
Note: Pin Code: K: Cathode
A: Anode
R: Reference
X: No Connection
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Copyright © 2016 Unisonic Technologies Co., Ltd
7
A
8
R
Packing
Tape Reel
Tape Reel
Tape Reel
Tape Box
Bulk
Tape Reel
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TL432

LINEAR INTEGRATED CIRCUIT
MARKING
PACKAGE
MARKING
SOT-89
3
432G
SOT-23
2
1
5
4
432G
SOT-25
1
2
3
SOP-8
TO-92

BLOCK DIAGRAM
CATHODE(K)
+
-
REFERENCE(R)
+
-
1.25V
ANODE(A)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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TL432

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATING
UNIT
Cathode-Anode Reverse Breakdown
VKA
15
V
Operating Cathode Current
IKA
50
mA
Reference Input Current
IREF
1
mA
Junction Temperature
TJ
+125
°C
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-40 ~ +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.

THERMAL DATA
PARAMETER
SC-59/SOT-25
TO-92
Junction to Ambient
SOP-8
SOT-89

RATING
350
100
150
220
θJA
UNIT
°C/W
°C/W
°C/W
°C/W
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Cathode Voltage
Cathode Current

SYMBOL
SYMBOL
VKA
IK
MIN
VREF
5
TYP
MAX
15
UNIT
V
mA
10
ELECTRICAL CHARACTERISTICS (TJ=25°C, VKA=VREF, IK=10mA, unless otherwise specified.)
PARAMETER
TL432-A
TL432-1
Refer Input Voltage
TL432-2
TL432-3
Line Regulation
Load Regulation
Temperature Deviation
Reference Input Current
Reference Input Current Temperature
Coefficient
Minimum Cathode Current for Regulation
Off State Leakage
SYMBOL
VREF
IK=10mA, VK=VREF
∆VREF
∆VREF
∆VREF
IREF
VK=1.25 ~ 15V
IK=5 ~ 50mA
0<TJ<85°C
∆IREF
0<TJ<85°C
IK(MIN)
IKA(OFF)
UNISONIC TECHNOLOGIES CO., LTD
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TEST CONDITIONS
VREF=0V,VKA=15V
MIN
1.243
1.237
1.263
1.225
TYP MAX UNIT
1.250 1.256
V
1.250 1.263
V
1.275
V
1.237
V
10
26
mV
6
15
mV
2
6
mV
3
6
μA
0.3
0.6
μA
0.6
1
500
mA
nA
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TL432
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LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
INPUT
VKA
IKA
R1
IREF
VREF
R2
For VKA=VREF

UTC TL432
VKA=VREF×(1+R1/R2)+IREF×R1
For VKA≥VREF
For IKA(OFF)
APPLICATION CIRCUIT
VIN
IN
UTC7805
VOUT
OUT
COMMON
R1
VREF
R2
UTC
TL432
VOUT=(1+R1/R2)×VREF
Shutdown Regulator
UNISONIC TECHNOLOGIES CO., LTD
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VOUT
R1
VREF
R2
UTC
TL432
VOUT=(1+R1/R2)×VREF
Minimum VOUT=VREF+5V
Output Control of a Three
-Terminal Fixed Regulator
IOUT=VREF/RS
Constant-current Sink
VIN
VOUT=(1+R1/R2)×VREF
Higher-current Shunt Regulator
IOUT =VREF/RCL
Current Limiting or Current Source
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
IREF vs. Temperature
Cathode Current vs. Cathode Voltage
35
4
30
3
25
2
20
1
15
0
10
-1
5
0
10
5
15
20
Cathode Voltage, VK (V)
0
Change In Reference Input Voltage
Current vs. Cathod Voltage
0
-40
0
80
40
Temperature (℃)
120 160
Temperature vs. IREF
3
IKA=10mA
-5
Deviation of Reference
Voltage, VREF (V)
Change In Reference Input
Voltage Current (V)
-2
-80
25
-10
-15
-20
-25
IKA=10mA
TA=25℃
-30
2
1
-35
-40
0
50
Cathode Current (mA)
25
6
9
12
Cathod Voltage (V)
3
15
0
0
21
42
63
84
Temperature (℃)
105
TA=25°C
VKA=VREF
0
-25
-50
-75
-100
-2
-1
0
1
2
3
Cathode Voltage (V)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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TL432
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
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