TS3431
1.24 V adjustable shunt voltage reference
Datasheet
-
production data
•
Battery chargers
•
Switch mode power supply
•
Battery operated equipment
Description
SOT23-3L
(Plastic micropackage)
The TS3431 is an adjustable shunt voltage
reference with guaranteed temperature stability
over the entire operating temperature range
(- 40 °C to + 125 °C). The output voltage can be
set to any value between 1.24 V and 24 V with an
external resistor bridge.
Available in SOT23-3 surface mount package, it
can be used in application designs where space
saving is critical.
Reference
1
TS3431
3
Anode
Cathode
2
SOT23-3
(top view)
Features
•
Adjustable output voltage: 1.24 to 24 V
•
Several precision levels @ 25 °C ± 2%, ± 1%,
± 0.5% and ± 0.25%
•
Sink current capability: 0.4 to 100 mA
•
Industrial temperature range:
- 40 °C to +125 °C
•
Performance compatible with the industry
standard TL431
Applications
•
Computers
•
Instrumentation
December 2017
This is information on a product in full production.
DocID10174 Rev 5
1/15
www.st.com
Contents
TS3431
Contents
1
2
3
4
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1
SOT23-3L package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5
6
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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DocID10174 Rev 5
TS3431
Block diagram
1
Block diagram
Figure 1. Block diagram
Cathode
Reference
+
-
V
REF
Anode
DocID10174 Rev 5
3/15
15
Absolute maximum ratings
TS3431
2
Absolute maximum ratings
Table 1. Absolute maximum ratings (AMR)
Symbol
Parameter
Value
Unit
V
KA
I
K
I
REF
P
d
T
stg
ESD
Cathode to anode voltage
Reverse breakdown current
Reference current
Power dissipation
(1)
SOT23-3L
Storage temperature
Human body model (HBM)
Machine model (MM)
25
-100 to +150
-0.05 to10
360
-65 to +150
2
200
250
V
mA
mA
mW
°C
kV
V
°C
T
lead
Lead temperature (soldering, 10 seconds)
1. P
d
is calculated with T
amb
= 25 °C, T
j
= 150 °C, R
thjc
= 110 °C/W, R
thja
= 340 °C/W.
Table 2. Operating conditions
Symbol
Parameter
Value
Unit
I
K
V
K
T
oper
Cathode operating current
Cathode operating voltage
Operating free air temperature range
0.5 to 100
1.24 to 24
-40 to +125
mA
V
°C
4/15
DocID10174 Rev 5
TS3431
Electrical characteristics
3
Electrical characteristics
Limits are 100% production tested at 25 °C. Behavior at the temperature range limits is
guaranteed through correlation and by design. T
amb
= 25 °C (unless otherwise specified).
Table 3. Electrical characteristics
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
TS3431 (2%)
V
K
Reference input voltage I
K
= 10 mA,
V
ka
= V
ref
TS3431A (1%)
TS3431B (0.5%)
TS3431C (0.25%)
0 °C < T < +70 °C
ΔV
K
Variation of reference input voltage
over temperature, V
ka
= V
ref
Temperature coefficient
Minimum operating current
-40 °C < T < +125 °C
I
K
=10 mA
Ratio of change in reference input
voltage to change in cathode to anode V
K
= 24 to 1.24 V
voltage
-40 °C < T < +125 °C
Reference input current
I
K
=10 mA, R1=10 kΩ, R2=+
∞
Reference input current deviation
I
K
=10 mA, R1=10 kΩ, R2=+
T= 25 °C
-40 °C < T < +125 °C
0 °C < T < +70 °C
-40 °C < T < +125 °C
T= 25 °C
I
OFF
Off-state cathode current V
K
=24 V
-40 °C < T < +105 °C
-40 °C < T < +125 °C
R
KA
E
N
Reverse static impedance
Wide band noise
I
K
= 1 to 100 mA
I
K
= 10 mA
1 kHz < f < 100 kHz
-40 °C < T < +105 °C
-40 °C < T < +125 °C
T
C
I
Kmin
-40 °C < T < +125 °C
T = 25 °C
1.215
1.228
1.24
1.234
1.237
1.265
1.252
V
1.246
1.243
10
18
21
100
0.35
0.4
mA
0.5
1.2
1.5
mV/V
2
0.9
1.5
µA
2
0.5
0.9
35
1
µA
1.5
500
1000
2000
0.2
100
0.4
W
nV/√ Hz
nA
ppm/°C
mV
ΔVref
---------------
-
ΔVka
I
REF
ΔI
REF
DocID10174 Rev 5
5/15
15
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