TS2431
Adjustable shunt voltage reference
Datasheet - production data
Industrial temperature range: - 40 to + 105
°C
Performance compatible with industry-
standard TL431
Applications
Computers
Instrumentation
Battery chargers
Switch mode power supplies
Battery-operated equipment
Description
The TS2431 is an adjustable shunt voltage
reference with guaranteed temperature stability
over the entire temperature range of operations
from - 40 to + 105 °C. The output voltage may be
set to any value between 2.5 and 24 V with an
external resistor bridge. Available in an SOT23-
3L surface mount package, the device can be
implemented for those applications where space-
saving is of the utmost importance.
Features
Adjustable output voltage: 2.5 to 24 V
Precision selection at 25 °C: ± 2%, ± 1% and
± 0.5%
Sink current capability: 1 to 100 mA
Table 1: Device summary
Order code
TS2431ILT
TS2431AILT
TS2431BILT
-40 to + 105 °C
SOT23-3L
Tape and reel
Temperature range
Package
Packing
Precision
2%
1%
0.5%
Marking
L285
L286
L287
October 2017
DocID7961 Rev 6
1/16
www.st.com
This is information on a product in full production.
Contents
TS2431
Contents
1
2
3
4
Absolute maximum ratings and operating conditions ................. 3
Electrical characteristics ................................................................ 4
Package information ....................................................................... 9
3.1
SOT23-3L package information ........................................................ 9
Revision history ............................................................................ 15
2/16
DocID7961 Rev 6
TS2431
Absolute maximum
ratings and operating
conditions
1
Absolute maximum ratings and operating conditions
Table 2: Absolute maximum ratings
Symbol
V
ka
I
K
I
REF
P
d
T
std
ESD
T
LEAD
Notes:
(1)
Pd
(2)
Parameter
Cathode to anode voltage
Reverse breakdown current
Reference input current range
Power dissipation
(1)
SOT23-3L
Storage temperature
Human body model (HBM)
(2)
Machine model (MM)
(3)
Lead temperature (soldering, 10 s)
Value
25
-100 to +150
0.05 to +10
360
-65 to +150
2
200
260
Unit
V
mA
mA
mW
°C
kV
V
°C
has been calculated with T
amb
= 25 °C, T
junction
= 150 °C, R
thjc
= 110 °C/W and R
thja
= 340 °C/W for the
SOT23-3 package.
Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 kΩ
resistor between two pins of the device. This is done for all couples of connected pin combinations while the other
pins float.
(3)
Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between two
pins of the device with no external series resistor (internal resistor < 5 Ω). This is applied for all couples of
connected pin combinations while the other pins float.
Table 3: Operating conditions
Symbol
V
KA
I
K
T
oper
Notes:
(1)
Maximum
Parameter
Cathode to anode voltage
Cathode operating current
(1)
Operating free air temperature range
Value
V
REF
to 24
1 to 100
- 40 to + 105
Unit
V
mA
°C
power dissipation must be strictly observed to avoid damaging the component.
DocID7961 Rev 6
3/16
Electrical characteristics
TS2431
2
Electrical characteristics
Symbol
Parameter
Test conditions
V
K
= V
REF
, I
K
= 10
mA
TS2431 (2%)
V
REF
Reference input
voltage
TS2431A (1%)
TS2431B (0.5%)
TS2431B (1%), I
K
= 1 mA
Reference input
voltage deviation
over temperature
V
K
= V
REF
, I
K
= 10
mA
(1)(2)
Temperature
coefficient
(2)
Minimum
operating current
Ratio of change in
reference input
voltage to change
in cathode-to-
anode voltage
Reference input
current I
K
= 10 mA,
R1 = 10 kΩ, R2 =
+ ∞
(3)
Reference input
current deviation
I
K
= 10 mA, R1 =
10 kΩ, R2 = + ∞
(3)
Off-state cathode
current
Reverse dynamic
impedance
Wide band noise
0 °C < T < + 70 °C
-40 °C < T < + 85
°C
-40 °C < T < +
105 °C
-40 °C < T < +
105 °C
T = 25 °C
I
KMIN
-40 °C < T < +105
°C
2.45
2.475
2.488
2.475
10
17
20
50
0.3
Min.
Typ.
2.5
2.55
2.525
2.512
2.525
20
30
35
100
0.8
mA
1
ppm/°C
mV
V
Max.
Unit
|ΔV
REF
|
T
C
|
Δ
Δ
|
I
K
= 10 mA Vka =
24 to 2.5 V
0.3
2
mV/V
T = 25 °C
-40 °C < T < +105
°C
-40 °C < T < +105
°C
V
K
= 24 V, V
REF
=
GND
V
K
= V
REF
, ΔI
K
= 1
to 50 mA, f < 10
kHz
I
K
= 10 mA 10 Hz
< f < 10 kHz
0.5
3
2.5
µA
I
REF
|ΔI
REF
|
0.4
1.2
µA
I
OFF
10
500
nA
Ω
nV/√Hz
|Z
KA
|
0.5
0.75
E
N
Notes:
(1)
300
Limits are 100 % production tested at 25 °C. Overtemperature limits are guaranteed through correlation and by
design.
(2)
|ΔV
(3)
REF
| is defined as the difference between the maximum and minimum values of V
REF
obtained over the full
temperature range.
Refer to
Figure 4: "Test circuit for Vka = Vref"
.
4/16
DocID7961 Rev 6
TS2431
Figure 1: Reference voltage vs temperature
Electrical characteristics
Figure 2: Cathode voltage vs cathode current
Figure 3: Reference input current vs temperature
Figure 4: Test circuit for Vka = Vref
Figure 5: Cathode voltage vs cathode current
Figure 6: Dynamic impedance vs frequency
DocID7961 Rev 6
5/16
京公网安备 11010802033920号
EEWORLD
