SGLS302C − MARCH 2005 − REVISED APRIL 2008
D Qualified for Automotive Applications
D Operation From −40°C to 125°C
D Reference Voltage Tolerance at 25°C
D
D
D
D
D
DBV (SOT-23-5) PACKAGE
(TOP VIEW)
− 1% . . . A Grade
− 0.5% . . . B Grade
Typical Temperature Drift
− 14 mV (Q Temp)
Low Output Noise
0.2-Ω Typical Output Impedance
Sink-Current Capability = 1 mA to 100 mA
Adjustable Output Voltage = Vref to 36 V
NC
1
NC†
2
CATHODE
3
5
ANODE
4
REF
NC − No internal connection
† Pin 2 is connected internally to ANODE
(die substrate) and should be floating or
connected to ANODE.
TL431, TL431A, TL431B
DBZ (SOT-23-5) PACKAGE
(TOP VIEW)
CATHODE
1
REF
2
5
description
ANODE
The TL431 is a three-terminal adjustable shunt
regulator with specified thermal stability over
applicable automotive temperature ranges. The output voltage can be set to any value between Vref
(approximately 2.5 V) and 36 V, with two external resistors (see Figure 17). This device has a typical output
impedance of 0.2 Ω. Active output circuitry provides a sharp turn-on characteristic, making this device an
excellent replacement for Zener diodes in many applications, such as onboard regulation, adjustable power
supplies, and switching power supplies.
Ordering Information{
PACKAGE†
TA
−40°C to 125°C
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
TACQ
SOT-23-5 (DBV)
Reel of 3000
TL431AQDBVRQ1
SOT-23-3 (DBZ)
Reel of 3000
TL431BQDBZRQ1
T3FU
SOT-23-5 (DBV)
Reel of 3000
TL431QDBVRQ1
T3QU
SOT-23-3 (DBZ)
Reel of 3000
TL431AQDBZRQ1
TAQU
† For the most current package and ordering information, see the Package Option Addendum at the end of this
document, or see the TI web site at http://www.ti.com.
‡ Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
symbol
REF
ANODE
CATHODE
functional block diagram
CATHODE
+
REF
_
Vref
ANODE
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerFLEX is a trademark of Texas Instruments.
Copyright 2008, Texas Instruments Incorporated
!"# $"%&! '#(
'"! ! $#!! $# )# # #* "#
'' +,( '"! $!#- '# #!#&, !&"'#
#- && $##(
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SGLS302C − MARCH 2005 − REVISED APRIL 2008
equivalent schematic{
CATHODE
800 Ω
800 Ω
20 pF
REF
150 Ω
3.28 kΩ
2.4 kΩ
4 kΩ
10 kΩ
20 pF
7.2 kΩ
1 kΩ
800 Ω
ANODE
† All component values are nominal.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡
Cathode voltage, VKA (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 V
Continuous cathode current range, IKA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −100 mA to 150 mA
Reference input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 µA to 10 mA
Operating virtual junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
ESD protection level (see Note 2): HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (H2) 2.5 kV
CDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (C4) 1 kV
MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (M2) 200 V
‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: Voltage values are with respect to the ANODE terminal, unless otherwise noted.
NOTE 2: ESD Protection Level per AEC Q100 Classification
package thermal data (see Note3)
SOT-23-5 (DBV)
High K, JESD 51-7
θJC
131°C/W
SOT-23-3 (DBZ)
High K, JESD 51-7
76°C/W
PACKAGE
BOARD
θJA
206°C/W
206°C/W
NOTE 3: Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) − TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
recommended operating conditions
2
MIN
MAX
36
V
Cathode current
Vref
1
100
mA
Operating free-air temperature range
−40
125
°C
VKA
IKA
Cathode voltage
TA
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UNIT
SGLS302C − MARCH 2005 − REVISED APRIL 2008
electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise
noted)
PARAMETER
TL431Q
TEST
CIRCUIT
TEST CONDITIONS
UNIT
MIN
TYP
MAX
2440
2495
2550
mV
14
34
mV
−1.4
−2.7
−1
−2
mV
V
Vref
Reference voltage
2
VKA = Vref, IKA = 10 mA
VI(dev)
Deviation of reference voltage
over full temperature range
(see Figure 1)
2
VKA = Vref, IKA = 10 mA,
TA = −40°C to 125°C
DV ref
DV KA
Ratio of change in reference voltage
to the change in cathode voltage
3
IKA = 10 mA
Iref
Reference current
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞
2
4
µA
II(dev)
Deviation of reference current
over full temperature range
(see Figure 1)
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞,
TA = −40°C to 125°C
0.8
2.5
µA
Imin
Minimum cathode current for
regulation
2
VKA = Vref
0.4
1
mA
Ioff
Off-state cathode current
4
0.1
1
µA
|zKA|
Dynamic impedance (see Figure 1)
2
VKA = 36 V, Vref = 0
IKA = 1 mA to 100 mA, VKA = Vref,
f ≤ 1 kHz
0.2
0.5
Ω
∆VKA = 10 V − Vref
∆VKA = 36 V − 10 V
electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise
noted)
PARAMETER
TL431AQ
TEST
CIRCUIT
TEST CONDITIONS
UNIT
MIN
TYP
MAX
2470
2495
2520
mV
14
34
mV
−1.4
−2.7
−1
−2
mV
V
Vref
Reference voltage
2
VKA = Vref, IKA = 10 mA
VI(dev)
Deviation of reference voltage
over full temperature range
(see Figure 1)
2
VKA = Vref, IKA = 10 mA,
TA = −40°C to 125°C
DV ref
DV KA
Ratio of change in reference voltage
to the change in cathode voltage
3
IKA = 10 mA
Iref
Reference current
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞
2
4
µA
II(dev)
Deviation of reference current
over full temperature range
(see Figure 1)
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞,
TA = −40°C to 125°C
0.8
2.5
µA
Imin
Minimum cathode current
for regulation
2
VKA = Vref
0.4
0.7
mA
Ioff
Off-state cathode current
4
0.1
0.5
µA
|zKA|
Dynamic impedance (see Figure 1)
2
VKA = 36 V, Vref = 0
IKA = 1 mA to 100 mA, VKA = Vref,
f ≤ 1 kHz
0.2
0.5
Ω
POST OFFICE BOX 655303
∆VKA = 10 V − Vref
∆VKA = 36 V − 10 V
• DALLAS, TEXAS 75265
3
SGLS302C − MARCH 2005 − REVISED APRIL 2008
electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise
noted)
TL431BQ
TEST
CIRCUIT
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
2483
2495
2507
mV
14
34
mV
−1.4
−2.7
−1
−2
mV
V
Vref
Reference voltage
2
VKA = Vref, IKA = 10 mA
VI(dev)
Deviation of reference voltage
over full temperature range
(see Figure 1)
2
VKA = Vref, IKA = 10 mA,
TA = −40°C to 125°C
DV ref
DV KA
Ratio of change in reference voltage
to the change in cathode voltage
3
IKA = 10 mA
Iref
Reference current
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞
2
4
µA
II(dev)
Deviation of reference current
over full temperature range
(see Figure 1)
3
IKA = 10 mA, R1 = 10 kΩ, R2 = ∞,
TA = −40°C to 125°C
0.8
2.5
µA
Imin
Minimum cathode current
for regulation
2
VKA = Vref
0.4
0.7
mA
Ioff
Off-state cathode current
4
0.1
0.5
µA
|zKA|
Dynamic impedance (see Figure 1)
1
VKA = 36 V, Vref = 0
IKA = 1 mA to 100 mA, VKA = Vref,
f ≤ 1 kHz
0.2
0.5
Ω
∆VKA = 10 V − Vref
∆VKA = 36 V − 10 V
The deviation parameters, Vref(dev) and Iref(dev), are defined as the differences between the maximum and minimum
values obtained over the recommended temperature range. The average full-range temperature coefficient of the
reference voltage, αVref, is defined as:
Ťa Ť ǒppmǓ +
V
ref
ǒ
V(
I dev)
V at 25°C
ref
Maximum Vref
Ǔ
10 6
VI(dev)
Minimum Vref
DT A
°C
∆TA
where:
∆TA is the recommended operating free-air temperature range of the device.
a Vref can be positive or negative, depending on whether minimum Vref or maximum Vref, respectively, occurs at the
lower temperature.
Example: maximum Vref = 2496 mV at 30°C, minimum Vref = 2492 mV at 0°C, Vref = 2495 mV at 25°C,
∆TA = 70°C for TL431
Ťa Ť + ǒ
V
ref
4 mV
2495 mV
Ǔ
10 6
70°C
[
23 ppm
°C
Because minimum Vref occurs at the lower temperature, the coefficient is positive.
Calculating Dynamic Impedance
The dynamic impedance is defined as:
|z KA| +
DV KA
DI KA
When the device is operating with two external resistors (see Figure 3), the total dynamic impedance of the circuit
is given by:
|zȀ| + DV [ |z KA| 1 ) R1
DI
R2
ǒ
Ǔ
Figure 1. Calculating Deviation Parameters and Dynamic Impedance
4
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• DALLAS, TEXAS 75265
SGLS302C − MARCH 2005 − REVISED APRIL 2008
PARAMETER MEASUREMENT INFORMATION
Input
VKA
IKA
Vref
Figure 2. Test Circuit for VKA = Vref
VKA
Input
IKA
R1
Iref
R2
Vref
ǒ
Ǔ
V KA + V ref 1 ) R1 ) I ref
R2
R1
Figure 3. Test Circuit for VKA > Vref
Input
VKA
Ioff
Figure 4. Test Circuit for Ioff
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
SGLS302C − MARCH 2005 − REVISED APRIL 2008
TYPICAL CHARACTERISTICS
Table 1. Graphs
FIGURE
Reference voltage vs Free-air temperature
5
Reference current vs Free-air temperature
6
Cathode current vs Cathode voltage
7, 8
OFF-state cathode current vs Free-air temperature
9
Ratio of delta reference voltage to delta cathode voltage vs Free-air temperature
10
Equivalent input noise voltage vs Frequency
11
Equivalent input noise voltage over a 10-s period
12
Small-signal voltage amplification vs Frequency
13
Reference impedance vs Frequency
14
Pulse response
15
Stability boundary conditions
16
Table 2. Application Circuits
FIGURE
6
Shunt regulator
17
Single-supply comparator with temperature-compensated threshold
18
Precision high-current series regulator
19
Output control of a three-terminal fixed regulator
20
High-current shunt regulator
21
Crowbar circuit
22
Precision 5-V 1.5-A regulator
23
Efficient 5-V precision regulator
24
PWM converter with reference
25
Voltage monitor
26
Delay timer
27
Precision current limiter
28
Precision constant-current sink
29
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SGLS302C − MARCH 2005 − REVISED APRIL 2008
TYPICAL CHARACTERISTICS{
REFERENCE CURRENT
vs
FREE-AIR TEMPERATURE
REFERENCE VOLTAGE
vs
FREE-AIR TEMPERATURE
2600
R1 = 10 kΩ
R2 = ∞
IKA = 10 mA
Vref = 2550 mV‡
2560
I ref − Reference Current − µ A
V ref − Reference Voltage − mV
2580
5
VKA = Vref
IKA = 10 mA
2540
2520
Vref = 2495 mV‡
2500
2480
2460
Vref = 2440 mV‡
2440
4
3
2
1
2420
2400
−75
−50
−25
0
25
50
100
75
0
−75
125
−50
−25
Figure 5
50
75
100
125
Figure 6
CATHODE CURRENT
vs
CATHODE VOLTAGE
CATHODE CURRENT
vs
CATHODE VOLTAGE
150
800
VKA = Vref
TA = 25°C
VKA = Vref
TA = 25°C
100
600
I KA − Cathode Current − µ A
I KA − Cathode Current − mA
25
TA − Free-Air Temperature − °C
TA − Free-Air Temperature − °C
‡ Data is for devices having the indicated value of Vref at IKA = 10 mA,
TA = 25°C.
125
0
75
50
25
0
−25
−50
Imin
400
200
0
−75
−100
−2
−1
0
2
1
3
−200
−1
VKA − Cathode Voltage − V
0
1
2
3
VKA − Cathode Voltage − V
Figure 7
Figure 8
† Data at high and low temperatures is applicable only within the recommended operating free-air temperature ranges of the various devices.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
SGLS302C − MARCH 2005 − REVISED APRIL 2008
TYPICAL CHARACTERISTICS{
RATIO OF DELTA REFERENCE VOLTAGE TO
DELTA CATHODE VOLTAGE
vs
FREE-AIR TEMPERATURE
OFF-STATE CATHODE CURRENT
vs
FREE-AIR TEMPERATURE
− 0.85
2.5
VKA = 3 V to 36 V
− 0.95
2
∆V ref / ∆V KA − mV/V
I off − Off-State Cathode Current − µ A
VKA = 36 V
Vref = 0
1.5
1
0.5
0
−75
−1.05
−1.15
−1.25
−1.35
−50
−25
0
25
50
75
100
−1.45
−75
125
−50
TA − Free-Air Temperature − °C
−25
0
25
50
75
100
125
TA − Free-Air Temperature − °C
Figure 10
Figure 9
EQUIVALENT INPUT NOISE VOLTAGE
vs
FREQUENCY
Vn − Equivalent Input Noise Voltage − nV/ Hz
260
IO = 10 mA
TA = 25°C
240
220
200
180
160
140
120
100
10
100
1k
10 k
100 k
f − Frequency − Hz
Figure 11
† Data at high and low temperatures is applicable only within the recommended operating free-air temperature ranges of the various devices.
8
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SGLS302C − MARCH 2005 − REVISED APRIL 2008
TYPICAL CHARACTERISTICS
EQUIVALENT INPUT NOISE VOLTAGE
OVER A 10-S PERIOD
V n − Equivalent Input Noise Voltage − µV
6
5
4
3
2
1
0
−1
−2
−3
f = 0.1 to 10 Hz
IKA = 10 mA
TA = 25°C
−4
−5
−6
0
1
2
3
4
5
6
7
8
9
10
t − Time − s
19.1 V
1 kΩ
500 µF
910 Ω
2000 µF
VCC
TL431
(DUT)
820 Ω
+
VCC
1 µF
TLE2027
AV = 10 V/mV
+
−
16 Ω
160 kΩ
16 kΩ
16 kΩ
1 µF
TLE2027
−
22 µF
To
Oscilloscope
33 kΩ
AV = 2 V/V
0.1 µF
33 kΩ
VEE
VEE
Figure 12. Test Circuit for Equivalent Input Noise Voltage
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
9
SGLS302C − MARCH 2005 − REVISED APRIL 2008
TYPICAL CHARACTERISTICS
SMALL-SIGNAL VOLTAGE AMPLIFICATION
vs
FREQUENCY
IKA = 10 mA
TA = 25°C
A V − Small-Signal Voltage Amplification − dB
60
IKA = 10 mA
TA = 25°C
50
Output
15 kΩ
IKA
232 Ω
40
9 µF
+
30
−
8.25 kΩ
20
GND
TEST CIRCUIT FOR VOLTAGE AMPLIFICATION
10
0
1k
10 k
100 k
1M
10 M
f − Frequency − Hz
Figure 13
REFERENCE IMPEDANCE
vs
FREQUENCY
|z KA| − Reference Impedance − Ω
100
IKA = 10 mA
TA = 25°C
1 kΩ
10
IKA
50 Ω
−
+
GND
1
TEST CIRCUIT FOR REFERENCE IMPEDANCE
0.1
1k
10 k
100 k
1M
10 M
f − Frequency − Hz
Figure 14
10
Output
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SGLS302C − MARCH 2005 − REVISED APRIL 2008
TYPICAL CHARACTERISTICS
PULSE RESPONSE
6
TA = 25°C
Input
Input and Output Voltage − V
5
220 Ω
Output
4
Pulse
Generator
f = 100 kHz
3
Output
GND
2
TEST CIRCUIT FOR PULSE RESPONSE
1
0
−1
50 Ω
0
1
2
3
4
5
6
7
t − Time − µs
Figure 15
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• DALLAS, TEXAS 75265
11
SGLS302C − MARCH 2005 − REVISED APRIL 2008
TYPICAL CHARACTERISTICS
STABILITY BOUNDARY CONDITIONS†
FOR ALL TL431 AND TL431A DEVICES
(EXCEPT FOR SOT23-3, SC-70, AND Q-TEMP DEVICES)
100
90
I KA − Cathode Current − mA
80
A VKA = Vref
B VKA = 5 V
C VKA = 10 V
D VKA = 15 Vf
150 Ω
IKA
+
TA = 25°C
VBATT
CL
−
B
70
Stable
60
C
Stable
TEST CIRCUIT FOR CURVE A
50
A
40
IKA
150 Ω
R1 = 10 kΩ
30
D
20
CL
+
10
R2
0
0.001
VBATT
−
0.01
0.1
10
1
CL − Load Capacitance − µF
TEST CIRCUIT FOR CURVES B, C, AND D
STABILITY BOUNDARY CONDITIONS†
FOR ALL TL431B, TL432, SOT-23, SC-70, AND Q-TEMP DEVICES
100
90
I KA − Cathode Current − mA
80
150 Ω
A VKA = Vref
B VKA = 5 V
C VKA = 10 V
D VKA = 15 Vf
IKA
+
B
70
VBATT
CL
−
TA = 25°C
60
C
Stable
Stable
50
A
TEST CIRCUIT FOR CURVE A
40
A
30
D
IKA
20
150 Ω
R1 = 10 kΩ
B
10
0
0.001
CL
+
0.01
0.1
1
10
R2
CL − Load Capacitance − µF
−
† The areas under the curves represent conditions that may cause the
device to oscillate. For curves B, C, and D, R2 and V+ were adjusted
to establish the initial VKA and IKA conditions with CL = 0. VBATT and
CL then were adjusted to determine the ranges of stability.
TEST CIRCUIT FOR CURVES B, C, AND D
Figure 16
12
POST OFFICE BOX 655303
VBATT
• DALLAS, TEXAS 75265
SGLS302C − MARCH 2005 − REVISED APRIL 2008
APPLICATION INFORMATION
R
(see Note A)
VI(BATT)
VO
R1
0.1%
Vref
TL431
V
O
ǒ
Ǔ
+ 1 ) R1 V ref
R2
R2
0.1%
RETURN
NOTE A: R should provide cathode current ≥1 mA to the TL431 at minimum VI(BATT).
Figure 17. Shunt Regulator
VI(BATT)
VO
TL431
Von ≈2 V
Voff ≈VI(BATT)
Input
VIT ≈ 2.5 V
GND
Figure 18. Single-Supply Comparator With Temperature-Compensated Threshold
VI(BATT)
R
(see Note A)
2N222
2N222
30 Ω
V
0.01 µF
TL431
4.7 kΩ
O
ǒ
Ǔ
+ 1 ) R1 V ref
R2
VO
R2
0.1%
R1
0.1%
NOTE A: R should provide cathode current ≥1 mA to the TL431 at minimum VI(BATT).
Figure 19. Precision High-Current Series Regulator
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
13
SGLS302C − MARCH 2005 − REVISED APRIL 2008
APPLICATION INFORMATION
VI(BATT)
IN
OUT
uA7805
Common
VO
R1
TL431
V
O
ǒ
Ǔ
+ 1 ) R1 V ref
R2
Minimum V
O
+ V ref ) 5 V
R2
Figure 20. Output Control of a Three-Terminal Fixed Regulator
VI(BATT)
VO
R1
V
O
ǒ
Ǔ
+ 1 ) R1 V ref
R2
TL431
R2
Figure 21. High-Current Shunt Regulator
VI(BATT)
VO
R1
TL431
R2
C
(see Note A)
NOTE A: See the stability boundary conditions in Figure 16 to determine allowable values for C.
Figure 22. Crowbar Circuit
14
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• DALLAS, TEXAS 75265
SGLS302C − MARCH 2005 − REVISED APRIL 2008
APPLICATION INFORMATION
IN
VI(BATT)
LM317
8.2 kΩ
OUT
Adjust
VO ≈5 V, 1.5 A
243 Ω
0.1%
TL431
243 Ω
0.1%
Figure 23. Precision 5-V 1.5-A Regulator
VO ≈5 V
VI(BATT)
Rb
(see Note A)
27.4 kΩ
0.1%
TL431
27.4 kΩ
0.1%
NOTE A: Rb should provide cathode current ≥1 mA to the TL431.
Figure 24. Efficient 5-V Precision Regulator
12 V
VCC
6.8 kΩ
5V
10 kΩ
10 kΩ
0.1%
TL431
10 kΩ
0.1%
−
+
X
Not
Used
TL598
Feedback
Figure 25. PWM Converter With Reference
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
15
SGLS302C − MARCH 2005 − REVISED APRIL 2008
APPLICATION INFORMATION
R3
(see Note A)
VI(BATT)
R4
(see Note A)
R1B
R1A
ǒ
ǒ
TL431
R2A
Ǔ
Ǔ
Low Limit + 1 ) R1B V ref
R2B
High Limit + 1 ) R1A V ref
R2A
LED on When Low Limit < VI(BATT) < High Limit
R2B
NOTE A: R3 and R4 are selected to provide the desired LED intensity and cathode current ≥1 mA to the TL431 at the available VI(BATT).
Figure 26. Voltage Monitor
650 Ω
12 V
2 kΩ
R
TL431
Off
Delay + R
C
In
ǒ
Ǔ
12 V
12 V * V ref
C
On
Figure 27. Delay Timer
RCL
0.1%
VI(BATT)
IO
I out +
R1
TL431
R1 +
Figure 28. Precision Current Limiter
16
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
V ref
) I KA
R CL
V I(BATT)
I
O
h FE
) I KA
SGLS302C − MARCH 2005 − REVISED APRIL 2008
APPLICATION INFORMATION
VI(BATT)
IO
I
TL431
O
+
V ref
RS
RS
0.1%
Figure 29. Precision Constant-Current Sink
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
17
PACKAGE OPTION ADDENDUM
www.ti.com
3-Dec-2009
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
TL431AQDBVRQ1
ACTIVE
SOT-23
DBV
5
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
TL431AQDBZRQ1
ACTIVE
SOT-23
DBZ
3
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
TL431BQDBZRQ1
ACTIVE
SOT-23
DBZ
3
3000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
Lead/Ball Finish
MSL Peak Temp (3)
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TL431A-Q1, TL431B-Q1 :
• Catalog: TL431A, TL431B
NOTE: Qualified Version Definitions:
• Catalog - TI's standard catalog product
Addendum-Page 1
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