TS431
Taiwan Semiconductor
2.495V Programmable Shunt Voltage Reference
GENERAL DESCRIPTION
FEATURES
TS431 series integrated circuits are three-terminal
● Precision Reference Voltage
programmable shunt regulator diodes. These monolithic
TS431A – 2.495V ±1%
IC voltage references operate as a low temperature
coefficient zener which is programmable from VREF to 36
TS431B – 2.495V ±0.5%
● Equivalent Full Range Temp. Coefficient:
volts with two external resistors. These devices exhibit a
50ppm/°C
wide operating current range of 0.3 to 100mA with a
● Programmable Output Voltage up to 36V
typical dynamic
● Fast Turn-On Response
impedance of 0.22.
The characteristics of these references make them
● Sink Current Capability of 1~100mA
excellent replacements for zener diodes in many
● Low Dynamic Output Impedance: 0.2Ω
applications such as digital voltmeters, power supplies,
● Low Output Noise
● RoHS Compliant
● Halogen-free according to IEC 61249-2-21
and op amp circuitry. The 2.495V reference makes it
convenient to obtain a stable reference from 5.0V logic
supplies, and since The TS431 series operates as a
APPLICATION
shunt regulator, it can be used as either a positive or
● SMPS
negative stage reference.
● Lighting
● Telecommunication
● Home appliance
SOT-23
Pin Definition:
1. Reference
2. Cathode
3. Anode
SOP-8
Pin Definition
1. Cathode
2. Anode
3. Anode
4. N/C
5. N/C
6. Anode
7. Anode
8. Reference
Notes: MSL 3 (Moisture Sensitivity Level) per J-STD-020
TYPICAL APPLICATIN CIRCUIT
1
Version: I2104
TS431
Taiwan Semiconductor
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Cathode Voltage
(Note)
Continuous Cathode Current Range
Reference Input Current Range
SOT-23
Power Dissipation
SYMBOL
LIMIT
UNIT
VKA
37
V
IK
-100 ~ +150
mA
IREF
-0.05 ~ +10
mA
0.30
PD
SOP-8
Junction Temperature
W
0.50
TJ
+150
°C
Operating Temperature Range
TOPER
-40 ~ +85
°C
Storage Temperature Range
TSTG
-65 ~ +150
°C
PARAMETER
SYMBOL
LIMIT
UNIT
Cathode Voltage
VKA
VREF ~ 36
V
IK
1 ~ 100
mA
RECOMMEND OPERATING CONDITION
Continuous Cathode Current Range
ELECTRICAL CHARACTERISTICS
PARAMETER
Reference voltage
Deviation of reference
input voltage
Radio of change in Vref to
change in cathode Voltage
Reference Input current
Deviation of reference
input current, over temp.
Off-state Cathode Current
Minimum operating
cathode current
Dynamic Output
Impedance
CONDITIONS
SYMBOL
TS431A
VREF
TS431B
MIN
2.470
2.483
TYP
2.495
MAX
2.520
2.507
UNIT
V
VKA = VREF, IK =10mA
TA= full range
∆VREF
--
8
17
IKA =10mA,
∆VKA = 10V to VREF
∆VKA = 36V to 10V
∆VREF
/∆VKA
--
-1.4
-2.7
--
-1
-2
R1=10kΩ, R2= ,
IREF
--
0.7
4
µA
R1=10kΩ, R2= ,
IKA =10mA
TA= full range
∆IREF
--
0.4
1.2
µA
VREF =0V
IKA (off)
--
--
1
µA
VKA = VREF
IKA(min)
--
0.4
0.6
mA
f
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