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TL431ACDBZR,215 [NXP]

TL431 family - Adjustable precision shunt regulator TO-236 3-Pin;
TL431ACDBZR,215
型号： TL431ACDBZR,215
厂家： NXP    NXP
描述：

TL431 family - Adjustable precision shunt regulator TO-236 3-Pin

光电二极管
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TL431 family  
T23  
SO  
Adjustable precision shunt regulator  
Rev. 4 — 30 June 2011  
Product data sheet  
1. General description  
Three-terminal shunt regulator family with an output voltage range between Vref and 36 V,  
to be set by two external resistors.  
• The TL431xDBZR types feature an enhanced stability area with a very low  
load capacity requirement.  
• The TL431xFDT types offer an enhanced stability area and a higher  
ElectroMagnetic Interference (EMI) ruggedness, for example, for Switch Mode Power  
Supply (SMPS) applications.  
• The TL431xSDT types are designed for standard requirements and linear  
applications.  
Table 1.  
Product overview  
Reference voltage Temperature range (Tamb  
)
Pinning  
tolerance (Vref  
)
configuration  
(see Table 5)  
0 to 70 C  
40 to 85 C  
40 to 125 C  
2 %  
TL431CDBZR  
TL431IDBZR  
TL431QDBZR normal pinning  
TL431FDT  
TL431MFDT  
TL431SDT  
TL431MSDT  
normal pinning  
mirrored pinning  
normal pinning  
mirrored pinning  
1 %  
TL431ACDBZR TL431AIDBZR TL431AQDBZR normal pinning  
TL431AFDT  
TL431AMFDT  
TL431ASDT  
normal pinning  
mirrored pinning  
normal pinning  
TL431AMSDT mirrored pinning  
0.5 %  
TL431BCDBZR TL431BIDBZR TL431BQDBZR normal pinning  
TL431BFDT  
TL431BMFDT  
TL431BSDT  
normal pinning  
mirrored pinning  
normal pinning  
TL431BMSDT mirrored pinning  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
2. Features and benefits  
Programmable output voltage up to 36 V  
Three different reference voltage tolerances:  
Standard grade: 2 %  
A-Grade: 1 %  
B-Grade: 0.5 %  
Typical temperature drift: 6 mV (in a range of 0 C up to 70 C)  
Low output noise  
Typical output impedance: 0.2   
Sink current capability: 1 mA to 100 mA  
AEC-Q100 qualified (grade 1)  
3. Applications  
Shunt regulator  
Precision current limiter  
Precision constant current sink  
Isolated feedback loop for Switch Mode Power Supply (SMPS)  
4. Quick reference data  
Table 2.  
Quick reference data  
Symbol  
VKA  
Parameter  
Conditions  
Min  
Vref  
1
Typ  
Max  
36  
Unit  
V
cathode-anode voltage  
cathode current  
reference voltage  
-
-
IK  
100  
mA  
Vref  
VKA = Vref;  
IK = 10 mA;  
Tamb = 25 C  
Standard-Grade (2 %)  
A-Grade (1 %)  
2440  
2470  
2483  
2495  
2495  
2495  
2550  
2520  
2507  
mV  
mV  
mV  
B-Grade (0.5 %)  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
2 of 27  
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
5. Ordering information  
Table 3.  
Ordering information  
Type number  
Package  
Name  
-
Description  
plastic surface-mounted package; 3 leads  
Version  
TL431CDBZR  
TL431IDBZR  
TL431QDBZR  
TL431FDT  
SOT23  
TL431MFDT  
TL431SDT  
TL431MSDT  
TL431ACDBZR  
TL431AIDBZR  
TL431AQDBZR  
TL431AFDT  
TL431AMFDT  
TL431ASDT  
TL431AMSDT  
TL431BCDBZR  
TL431BIDBZR  
TL431BQDBZR  
TL431BFDT  
TL431BMFDT  
TL431BSDT  
TL431BMSDT  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
3 of 27  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
6. Marking  
Table 4.  
Marking codes  
Type number  
TL431CDBZR  
TL431IDBZR  
TL431QDBZR  
TL431FDT  
Marking code[1]  
Type number  
Marking code[1]  
CA*  
CB*  
CC*  
AR*  
AU*  
RM*  
LR*  
CD*  
CE*  
CF*  
AS*  
AV*  
TL431ASDT  
TL431AMSDT  
TL431BCDBZR  
TL431BIDBZR  
TL431BQDBZR  
TL431BFDT  
TL431BMFDT  
TL431BSDT  
TL431BMSDT  
-
RL*  
LQ*  
CG*  
CH*  
CJ*  
AT*  
AW*  
MA*  
MB*  
-
TL431MFDT  
TL431SDT  
TL431MSDT  
TL431ACDBZR  
TL431AIDBZR  
TL431AQDBZR  
TL431AFDT  
TL431AMFDT  
-
-
-
-
[1] * = placeholder for manufacturing site code.  
7. Functional diagram  
The TL431 family comprises a range of 3-terminal adjustable shunt regulators, with  
specified thermal stability over applicable automotive and commercial temperature  
ranges. The output voltage may be set to any value between Vref (approximately 2.5 V)  
and 36 V with two external resistors (see Figure 8). These devices have a typical output  
impedance of 0.2 . Active output circuitry provides a very sharp turn-on characteristic,  
making these devices excellent replacements for Zener diodes in many applications like  
on-board regulation, adjustable power supplies and switching power supplies.  
CATHODE  
REF  
V
ref  
006aab569  
ANODE  
Fig 1. Functional diagram  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
4 of 27  
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
8. Pinning information  
Table 5.  
Pin  
Pinning  
Symbol  
Description  
Simplified outline  
Graphic symbol  
Normal pinning: All types without MFDT and MSDT ending  
1
2
3
k
cathode  
reference  
anode  
REF  
3
REF  
a
a
k
1
2
006aab355  
Mirrored pinning: All types with MFDT and MSDT ending  
1
2
3
REF  
reference  
cathode  
anode  
REF  
3
k
a
k
a
1
2
006aab355  
9. Limiting values  
Table 6.  
Limiting values  
In accordance with the Absolute Maximum Rating System (IEC 60134).  
Symbol  
VKA  
IK  
Parameter  
Conditions  
Min  
Max  
37  
Unit  
cathode-anode voltage  
cathode current  
-
V
100  
150  
10  
mA  
mA  
mW  
mW  
mW  
C  
Iref  
reference current  
total power dissipation  
0.05  
[1]  
[2]  
[3]  
Ptot  
Tamb 25 C  
-
-
-
-
350  
580  
950  
150  
Tj  
junction temperature  
ambient temperature  
TL431XCDBZR  
Tamb  
0
+70  
C  
C  
C  
TL431XIDBZR  
40  
40  
+85  
TL431XQDBZR  
TL431XFDT  
TL431XSDT  
+125  
Tstg  
storage temperature  
65  
+150  
C  
[1] Device mounted on an FR4 Printed-Circuit Board (PCB), single-sided copper, tin-plated and standard  
footprint.  
[2] Device mounted on an FR4 PCB, single-sided copper, tin-plated, mounting pad for anode 1 cm2.  
[3] Device mounted on a ceramic PCB, Al2O3, standard footprint.  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
5 of 27  
 
 
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab570  
1250  
P
tot  
(mW)  
(1)  
1000  
750  
500  
250  
0
(2)  
(3)  
−75  
−25  
25  
75  
125  
T
175  
(°C)  
amb  
(1) Ceramic PCB, Al2O3, standard footprint  
(2) FR4 PCB, mounting pad for anode 1 cm2  
(3) FR4 PCB, standard footprint  
Fig 2. Power derating curves  
Table 7. ESD maximum ratings  
Tamb = 25 C unless otherwise specified.  
Symbol Parameter  
Conditions  
Min  
Max Unit  
VESD  
electrostatic discharge voltage  
MIL-STD-883  
-
4
kV  
(human body model)  
10. Recommended operating conditions  
Table 8.  
Symbol  
VKA  
Operating conditions  
Parameter  
Conditions  
Min  
Vref  
1
Max  
Unit  
V
cathode-anode voltage  
cathode current  
36  
IK  
100  
mA  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
6 of 27  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
11. Thermal characteristics  
Table 9.  
Symbol  
Rth(j-a)  
Thermal characteristics  
Parameter  
Conditions  
Min  
Typ  
Max  
360  
216  
132  
50  
Unit  
K/W  
K/W  
K/W  
K/W  
[1]  
[2]  
[3]  
[4]  
thermal resistance from  
junction to ambient  
in free air  
-
-
-
-
-
-
-
-
Rth(j-sp)  
thermal resistance from  
junction to solder point  
[1] Device mounted on an FR4 PCB, single-sided copper, tin-plated and standard footprint.  
[2] Device mounted on an FR4 PCB, single-sided copper, tin-plated, mounting pad for anode 1 cm2.  
[3] Device mounted on a ceramic PCB, Al2O3, standard footprint.  
[4] Soldering point of anode.  
12. Characteristics  
Table 10. Characteristics  
Tamb = 25 C unless otherwise specified.  
Symbol  
Standard-Grade (2 %):  
TL431CDBZR; TL431IDBZR; TL431QDBZR; TL431FDT; TL431MFDT; TL431SDT; TL431MSDT  
Parameter  
Conditions  
Min  
Typ  
Max  
Unit  
Vref  
reference voltage  
reference voltage variation  
TL431CDBZR  
VKA = Vref; IK = 10 mA  
VKA = Vref; IK = 10 mA  
Tamb = 0 C to 70 C  
Tamb = 40 C to 85 C  
Tamb = 40 C to 125 C  
2440  
2495  
2550  
mV  
Vref  
-
-
6
16  
34  
mV  
mV  
TL431IDBZR  
14  
TL431QDBZR  
TL431FDT  
TL431MFDT  
TL431SDT  
TL431MSDT  
Vref/VKA reference voltage variation  
to cathode-anode voltage  
variation ratio  
IK = 10 mA  
VKA = 10 V to Vref  
VKA = 36 V to 10 V  
-
-
-
1.4  
1  
2
2.7  
2  
4
mV/V  
mV/V  
A  
Iref  
reference current  
IK = 10 mA;  
R1 = 10 k; R2 = open  
Iref  
reference current variation  
IK = 10 mA;  
R1 = 10 k; R2 = open  
TL431CDBZR  
TL431IDBZR  
Tamb = 0 C to 70 C  
-
-
0.4  
0.8  
1.2  
2.5  
A  
A  
Tamb = 40 C to 85 C  
Tamb = 40 C to 125 C  
TL431QDBZR  
TL431FDT  
TL431MFDT  
TL431SDT  
TL431MSDT  
IK(min)  
minimum cathode current  
VKA = Vref  
-
0.4  
1
mA  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
7 of 27  
 
 
 
 
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
Table 10. Characteristics …continued  
Tamb = 25 C unless otherwise specified.  
Symbol  
Ioff  
Parameter  
Conditions  
Min  
Typ  
0.1  
0.2  
Max  
1
Unit  
A  
off-state current  
VKA = 36 V; Vref = 0  
-
-
ZKA  
dynamic cathode-anode  
impedance  
IK = 1 mA to 100 mA;  
VKA = Vref; f < 1 kHz  
0.5  
A-Grade (1 %):  
TL431ACDBZR; TL431AIDBZR; TL431AQDBZR; TL431AFDT; TL431AMFDT; TL431ASDT; TL431AMSDT  
Vref  
reference voltage  
reference voltage variation  
TL431ACDBZR  
VKA = Vref; IK = 10 mA  
VKA = Vref; IK = 10 mA  
Tamb = 0 C to 70 C  
Tamb = 40 C to 85 C  
Tamb = 40 C to 125 C  
2470  
2495  
2520  
mV  
Vref  
-
-
6
16  
34  
mV  
mV  
TL431AIDBZR  
14  
TL431AQDBZR  
TL431AFDT  
TL431AMFDT  
TL431ASDT  
TL431AMSDT  
Vref/VKA reference voltage variation  
to cathode-anode voltage  
variation ratio  
IK = 10 mA  
VKA = 10 V to Vref  
VKA = 36 V to 10 V  
-
-
-
1.4  
1  
2
2.7  
2  
4
mV/V  
mV/V  
A  
Iref  
reference current  
IK = 10 mA;  
R1 = 10 k; R2 = open  
Iref  
reference current variation  
IK = 10 mA;  
R1 = 10 k; R2 = open  
TL431ACDBZR  
TL431AIDBZR  
Tamb = 0 C to 70 C  
-
-
0.4  
0.8  
1.2  
2.5  
A  
A  
Tamb = 40 C to 85 C  
Tamb = 40 C to 125 C  
TL431AQDBZR  
TL431AFDT  
TL431AMFDT  
TL431ASDT  
TL431AMSDT  
IK(min)  
minimum cathode current  
TL431ACDBZR  
VKA = Vref  
Tamb = 0 C to 70 C  
Tamb = 40 C to 85 C  
Tamb = 40 C to 125 C  
-
0.4  
0.6  
mA  
TL431AIDBZR  
TL431AQDBZR  
TL431AFDT  
TL431AMFDT  
TL431ASDT  
TL431AMSDT  
Ioff  
off-state current  
VKA = 36 V; Vref = 0  
-
-
0.1  
0.2  
0.5  
0.5  
A  
ZKA  
dynamic cathode-anode  
impedance  
IK = 1 mA to 100 mA;  
VKA = Vref; f < 1 kHz  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
8 of 27  
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
Table 10. Characteristics …continued  
Tamb = 25 C unless otherwise specified.  
Symbol  
B-Grade (0.5 %):  
TL431BCDBZR; TL431BIDBZR; TL431BQDBZR; TL431BFDT; TL431BMFDT; TL431BSDT; TL431BMSDT  
Parameter  
Conditions  
Min  
Typ  
Max  
Unit  
Vref  
reference voltage  
reference voltage variation  
TL431BCDBZR  
VKA = Vref; IK = 10 mA  
VKA = Vref; IK = 10 mA  
Tamb = 0 C to 70 C  
Tamb = 40 C to 85 C  
Tamb = 40 C to 125 C  
2483  
2495  
2507  
mV  
Vref  
-
-
6
16  
34  
mV  
mV  
TL431BIDBZR  
14  
TL431BQDBZR  
TL431BFDT  
TL431BMFDT  
TL431BSDT  
TL431BMSDT  
Vref/VKA reference voltage variation  
to cathode-anode voltage  
variation ratio  
IK = 10 mA  
VKA = 10 V to Vref  
VKA = 36 V to 10 V  
-
-
-
1.4  
1  
2
2.7  
2  
4
mV/V  
mV/V  
A  
Iref  
reference current  
IK = 10 mA;  
R1 = 10 k; R2 = open  
Iref  
reference current variation  
IK = 10 mA;  
R1 = 10 k; R2 = open  
TL431BCDBZR  
TL431BIDBZR  
Tamb = 0 C to 70 C  
-
-
0.4  
0.8  
1.2  
2.5  
A  
A  
Tamb = 40 C to 85 C  
Tamb = 40 C to 125 C  
TL431BQDBZR  
TL431BFDT  
TL431BMFDT  
TL431BSDT  
TL431BMSDT  
IK(min)  
minimum cathode current  
TL431BCDBZR  
VKA = Vref  
Tamb = 0 C to 70 C  
Tamb = 40 C to 85 C  
Tamb = 40 C to 125 C  
-
0.4  
0.6  
mA  
TL431BIDBZR  
TL431BQDBZR  
TL431BFDT  
TL431BMFDT  
TL431BSDT  
TL431BMSDT  
Ioff  
off-state current  
VKA = 36 V; Vref = 0  
IK = 1 mA to 100 mA;  
-
-
0.1  
0.2  
0.5  
0.5  
A  
ZKA  
dynamic cathode-anode  
impedance  
VKA = Vref; f < 1 kHz  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
9 of 27  
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab571  
006aab572  
2.60  
150  
V
I
K
ref  
(V)  
(mA)  
2.56  
100  
2.52  
2.48  
2.44  
2.40  
50  
0
−50  
−100  
−75  
−25  
25  
75  
125  
(°C)  
−2  
−1  
0
1
2
3
T
V
(V)  
KA  
amb  
IK = 10 mA; VKA = Vref  
VKA = Vref; Tamb = 25 C  
Fig 3. Reference voltage as a function of ambient  
temperature; typical values  
Fig 4. Cathode current as a function of  
cathode-anode voltage; typical values  
INPUT  
V
KA  
I
K
V
ref  
GND  
006aab573  
IK = 10 mA; VKA = Vref  
Fig 5. Test circuit to Figure 3 and Figure 4  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
10 of 27  
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab574  
006aab575  
5.0  
0
I
ref  
(μA)  
ΔV  
ref  
(mV)  
4.0  
−20  
−40  
−60  
3.0  
2.0  
1.0  
0.0  
−75  
−25  
25  
75  
125  
(°C)  
0
10  
20  
30  
40  
T
V
(V)  
KA  
amb  
IK = 10 mA; R1 = 10 k; R2 = open  
IK = 10 mA; Tamb = 25 C  
Fig 6. Reference current as a function of ambient  
temperature; typical values  
Fig 7. Reference voltage variation as a function of  
cathode-anode voltage; typical values  
INPUT  
V
KA  
I
K
R1  
I
ref  
R2  
V
ref  
GND  
006aab576  
R1  
R2  
------  
VKA = Vref 1 +  
+ Iref R1  
Fig 8. Test circuit to Figure 6 and Figure 7  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
11 of 27  
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab577  
250  
I
off  
(nA)  
200  
150  
100  
50  
0
−75  
−25  
25  
75  
125  
(°C)  
T
amb  
VKA = 36 V; Vref = 0 V  
Fig 9. Off-state current as a function of ambient temperature; typical values  
INPUT  
V
KA  
I
off  
GND  
006aab578  
VKA = 36 V; Vref = 0 V  
Fig 10. Off-state current as a function of ambient temperature; test circuit  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
12 of 27  
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab579  
006aac478  
6
6
(1)  
(1)  
V ; V  
(V)  
V ; V  
in out  
(V)  
in out  
4
2
0
4
2
0
(2)  
(2)  
−1  
1
3
5
7
−1  
1
3
5
7
t (μs)  
t (μs)  
Tamb = 25 C  
Tamb = 25 C  
(1) Input  
(1) Input  
(2) Output  
(2) Output  
Fig 11. All types except TL431XFDT and TL431XSDT:  
Input voltage and output voltage as a function  
of time; typical values  
Fig 12. TL431XFDT:  
Input voltage and output voltage as a function  
of time; typical values  
006aab580  
6
(1)  
V ; V  
in out  
(V)  
4
2
0
220 Ω  
V
KA  
(2)  
PULSE  
GENERATOR  
f = 100 kHz  
50 Ω  
−1  
1
3
5
7
GND  
t (μs)  
006aab581  
Tamb = 25 C  
Tamb = 25 C  
(1) Input  
(2) Output  
Fig 13. TL431XSDT:  
Fig 14. Test circuit to Figure 11, Figure 12 and  
Figure 13  
Input voltage and output voltage as a function  
of time; typical values  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
13 of 27  
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab583  
006aac479  
60  
60  
A
v
A
v
(dB)  
(dB)  
40  
40  
20  
20  
0
0
2
3
4
2
3
4
1
10  
10  
10  
10  
1
10  
10  
10  
10  
f (kHz)  
f (kHz)  
IK = 10 mA; Tamb = 25 C  
IK = 10 mA; Tamb = 25 C  
Fig 15. All types except TL431XFDT and TL431XSDT:  
Voltage amplification as a function of  
frequency; typical values  
Fig 16. TL431XFDT:  
Voltage amplification as a function of  
frequency; typical values  
006aab582  
60  
A
v
(dB)  
V
40  
KA  
15 kΩ  
I
232 Ω  
K
9 pF  
20  
8.25 kΩ  
0
GND  
2
3
4
1
10  
10  
10  
10  
f (kHz)  
006aab584  
IK = 10 mA; Tamb = 25 C  
IK = 10 mA; Tamb = 25 C  
Fig 17. TL431XSDT:  
Fig 18. Test circuit to Figure 15, Figure 16 and  
Figure 17  
Voltage amplification as a function of  
frequency; typical values  
TL431_FAM  
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Product data sheet  
Rev. 4 — 30 June 2011  
14 of 27  
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab585  
006aac480  
2
2
10  
10  
Z
Z
KA  
KA  
(Ω)  
(Ω)  
10  
10  
1
1
−1  
−1  
10  
10  
2
3
4
2
3
4
1
10  
10  
10  
10  
1
10  
10  
10  
10  
f (kHz)  
f (kHz)  
IK = 10 mA; Tamb = 25 C  
IK = 10 mA; Tamb = 25 C  
Fig 19. All types except TL431XFDT and TL431XSDT:  
Dynamic cathode-anode impedance as a  
function of frequency; typical values  
Fig 20. TL431XFDT:  
Dynamic cathode-anode impedance as a  
function of frequency; typical values  
006aab586  
2
10  
Z
KA  
(Ω)  
10  
V
KA  
1 kΩ  
I
K
1
50 Ω  
−1  
10  
2
3
4
1
10  
10  
10  
10  
GND  
f (kHz)  
006aab587  
IK = 10 mA; Tamb = 25 C  
IK = 10 mA; Tamb = 25 C  
Fig 21. TL431XSDT:  
Fig 22. Test circuit to Figure 19, Figure 20 and  
Figure 21  
Dynamic cathode-anode impedance as a  
function of frequency; typical values  
TL431_FAM  
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Product data sheet  
Rev. 4 — 30 June 2011  
15 of 27  
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab588  
100  
I
K
(mA)  
80  
(1)  
(1)  
60  
40  
20  
0
Stable  
Oscillation  
Stable  
2
3
4
1
10  
10  
10  
10  
C
L
(nF)  
Tamb = 25 C  
(1) VKA = Vref  
VKA = 5 V: no oscillation  
KA = 10 V: no oscillation  
VKA = 15 V: no oscillation  
V
Fig 23. All types except TL431XFDT and TL431XSDT:  
Cathode current as a function of load capacitance; typical values  
150 Ω  
I
K
I
R1 = 10 kΩ  
150 Ω  
K
C
L
C
L
V
BATT  
V
BATT  
R2  
GND  
GND  
006aab589  
006aab590  
VKA = Vref  
V
KA > 5 V: stable operation  
Tamb = 25 C  
Tamb = 25 C  
Fig 24. Test circuit (1) to Figure 23  
Fig 25. Test circuit (2) to Figure 23  
TL431_FAM  
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Product data sheet  
Rev. 4 — 30 June 2011  
16 of 27  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aac481  
100  
I
K
(mA)  
80  
(1)  
(1)  
60  
40  
20  
0
Stable  
Oscillation  
Stable  
−1  
2
3
4
10  
1
10  
10  
10  
10  
C
L
(nF)  
Tamb = 25 C  
(1) VKA = Vref  
VKA = 5 V: no oscillation  
KA = 10 V: no oscillation  
VKA = 15 V: no oscillation  
V
Fig 26. TL431XFDT: Cathode current as a function of load capacitance; typical values  
150 Ω  
I
K
I
R1 = 10 kΩ  
150 Ω  
K
C
L
C
L
V
BATT  
V
BATT  
R2  
GND  
GND  
006aab589  
006aab590  
VKA = Vref  
VKA > 5 V: stable operation  
amb = 25 C  
Tamb = 25 C  
T
Fig 27. Test circuit (1) to Figure 26  
Fig 28. Test circuit (2) to Figure 26  
TL431_FAM  
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© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
17 of 27  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
006aab591  
100  
I
K
(mA)  
80  
(1)  
(1)  
(2)  
(2)  
60  
40  
20  
0
Stable  
Oscillation  
Stable  
−1  
2
3
4
10  
1
10  
10  
10  
10  
C
(nF)  
L
Tamb = 25 C  
(1) VKA = Vref  
(2) VKA = 5 V  
VKA = 10 V: no oscillation  
VKA = 15 V: no oscillation  
Fig 29. TL431XSDT: Cathode current as a function of load capacitance; typical values  
150 Ω  
I
K
I
R1 = 10 kΩ  
150 Ω  
K
C
L
C
L
V
BATT  
V
BATT  
R2  
GND  
GND  
006aab589  
006aab590  
VKA = Vref  
VKA = 5 V  
Tamb = 25 C  
VKA > 10 V: stable operation  
Tamb = 25 C  
Fig 30. Test circuit (1) to Figure 29  
Fig 31. Test circuit (2) to Figure 29  
TL431_FAM  
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Product data sheet  
Rev. 4 — 30 June 2011  
18 of 27  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
13. Application information  
V+  
V
OUT  
R1  
R2  
006aab592  
R1  
R2  
------  
VOUT  
=
1 +  
Vref  
Fig 32. Shunt regulator  
V+  
V
OUT  
R1  
R2  
006aab593  
R1  
------  
VOUT  
=
1 +  
Vref  
;
VOUTmin= Vref + Vbe  
R2  
Fig 33. Series pass regulator  
V+  
V
OUT  
V
IN  
006aab594  
Vth = Vref  
VIN Vref VOUT 0  
VIN Vref VOUT 2V  
Fig 34. Single-supply comparator with temperature-compensated threshold  
TL431_FAM  
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© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
19 of 27  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
R
CL  
V+  
I
OUT  
006aab595  
Vref  
---------  
RCL  
IOUT  
=
Fig 35. Constant current source  
V+  
V
OUT  
R1  
R2  
006aab596  
R1  
R2  
------  
VOUT  
=
1 +  
Vref  
Fig 36. High-current shunt regulator  
I
V+  
SINK  
R
S
006aab597  
Vref  
---------  
RS  
ISINK  
=
Fig 37. Constant current sink  
TL431_FAM  
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© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
20 of 27  
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
REGULATOR LINE  
V
OUT  
GND  
R3  
R1  
R2  
REF  
GND  
006aac482  
Fig 38. TL431 in control loop of SMPS  
14. Test information  
14.1 Quality information  
This product has been qualified in accordance with the Automotive Electronics Council  
(AEC) standard Q100 - Failure mechanism based stress test qualification for integrated  
circuits, and is suitable for use in automotive applications.  
15. Package outline  
3.0  
2.8  
1.1  
0.9  
3
0.45  
0.15  
2.5 1.4  
2.1 1.2  
1
2
0.48  
0.38  
0.15  
0.09  
1.9  
Dimensions in mm  
04-11-04  
Fig 39. Package outline SOT23 (TO-236AB)  
TL431_FAM  
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Product data sheet  
Rev. 4 — 30 June 2011  
21 of 27  
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
16. Packing information  
Table 11. Packing methods  
The indicated -xxx are the last three digits of the 12NC ordering code.[1]  
Type number  
Package Description  
Packing quantity  
3000  
10000  
TL431CDBZR  
TL431IDBZR  
TL431QDBZR  
TL431FDT  
SOT23  
4 mm pitch, 8 mm tape and reel  
-215  
-235  
TL431MFDT  
TL431SDT  
TL431MSDT  
TL431ACDBZR  
TL431AIDBZR  
TL431AQDBZR  
TL431AFDT  
TL431AMFDT  
TL431ASDT  
TL431AMSDT  
TL431BCDBZR  
TL431BIDBZR  
TL431BQDBZR  
TL431BFDT  
TL431BMFDT  
TL431BSDT  
TL431BMSDT  
[1] For further information and the availability of packing methods, see Section 20.  
TL431_FAM  
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© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
22 of 27  
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
17. Soldering  
3.3  
2.9  
1.9  
solder lands  
solder resist  
2
3
1.7  
solder paste  
occupied area  
0.6  
(3×)  
0.7  
(3×)  
Dimensions in mm  
0.5  
(3×)  
0.6  
(3×)  
1
sot023_fr  
Fig 40. Reflow soldering footprint SOT23 (TO-236AB)  
2.2  
1.2  
(2×)  
1.4  
(2×)  
solder lands  
solder resist  
occupied area  
2.6  
4.6  
Dimensions in mm  
1.4  
preferred transport direction during soldering  
2.8  
4.5  
sot023_fw  
Fig 41. Wave soldering footprint SOT23 (TO-236AB)  
TL431_FAM  
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© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
23 of 27  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
18. Revision history  
Table 12. Revision history  
Document ID  
TL431_FAM v.4  
Modifications:  
TL431_FAM v.3  
TL431_FAM v.2  
TL431_FAM v.1  
Release date  
20110630  
Data sheet status  
Change notice  
Supersedes  
Product data sheet  
-
TL431_FAM v.3  
• Table 10 “Characteristics”: Temperature conditions explained; IK(min) updated.  
20101105  
20100120  
20090806  
Product data sheet  
Product data sheet  
Product data sheet  
-
-
-
TL431_FAM v.2  
TL431_FAM v.1  
-
TL431_FAM  
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© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
24 of 27  
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
19. Legal information  
19.1 Data sheet status  
Document status[1][2]  
Product status[3]  
Development  
Definition  
Objective [short] data sheet  
This document contains data from the objective specification for product development.  
This document contains data from the preliminary specification.  
This document contains the product specification.  
Preliminary [short] data sheet Qualification  
Product [short] data sheet Production  
[1]  
[2]  
[3]  
Please consult the most recently issued document before initiating or completing a design.  
The term ‘short data sheet’ is explained in section “Definitions”.  
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status  
information is available on the Internet at URL http://www.nxp.com.  
malfunction of an NXP Semiconductors product can reasonably be expected  
19.2 Definitions  
to result in personal injury, death or severe property or environmental  
damage. NXP Semiconductors accepts no liability for inclusion and/or use of  
NXP Semiconductors products in such equipment or applications and  
therefore such inclusion and/or use is at the customer’s own risk.  
Draft — The document is a draft version only. The content is still under  
internal review and subject to formal approval, which may result in  
modifications or additions. NXP Semiconductors does not give any  
representations or warranties as to the accuracy or completeness of  
information included herein and shall have no liability for the consequences of  
use of such information.  
Applications — Applications that are described herein for any of these  
products are for illustrative purposes only. NXP Semiconductors makes no  
representation or warranty that such applications will be suitable for the  
specified use without further testing or modification.  
Short data sheet — A short data sheet is an extract from a full data sheet  
with the same product type number(s) and title. A short data sheet is intended  
for quick reference only and should not be relied upon to contain detailed and  
full information. For detailed and full information see the relevant full data  
sheet, which is available on request via the local NXP Semiconductors sales  
office. In case of any inconsistency or conflict with the short data sheet, the  
full data sheet shall prevail.  
Customers are responsible for the design and operation of their applications  
and products using NXP Semiconductors products, and NXP Semiconductors  
accepts no liability for any assistance with applications or customer product  
design. It is customer’s sole responsibility to determine whether the NXP  
Semiconductors product is suitable and fit for the customer’s applications and  
products planned, as well as for the planned application and use of  
customer’s third party customer(s). Customers should provide appropriate  
design and operating safeguards to minimize the risks associated with their  
applications and products.  
Product specification — The information and data provided in a Product  
data sheet shall define the specification of the product as agreed between  
NXP Semiconductors and its customer, unless NXP Semiconductors and  
customer have explicitly agreed otherwise in writing. In no event however,  
shall an agreement be valid in which the NXP Semiconductors product is  
deemed to offer functions and qualities beyond those described in the  
Product data sheet.  
NXP Semiconductors does not accept any liability related to any default,  
damage, costs or problem which is based on any weakness or default in the  
customer’s applications or products, or the application or use by customer’s  
third party customer(s). Customer is responsible for doing all necessary  
testing for the customer’s applications and products using NXP  
Semiconductors products in order to avoid a default of the applications and  
the products or of the application or use by customer’s third party  
customer(s). NXP does not accept any liability in this respect.  
19.3 Disclaimers  
Limiting values — Stress above one or more limiting values (as defined in  
the Absolute Maximum Ratings System of IEC 60134) will cause permanent  
damage to the device. Limiting values are stress ratings only and (proper)  
operation of the device at these or any other conditions above those given in  
the Recommended operating conditions section (if present) or the  
Characteristics sections of this document is not warranted. Constant or  
repeated exposure to limiting values will permanently and irreversibly affect  
the quality and reliability of the device.  
Limited warranty and liability — Information in this document is believed to  
be accurate and reliable. However, NXP Semiconductors does not give any  
representations or warranties, expressed or implied, as to the accuracy or  
completeness of such information and shall have no liability for the  
consequences of use of such information.  
In no event shall NXP Semiconductors be liable for any indirect, incidental,  
punitive, special or consequential damages (including - without limitation - lost  
profits, lost savings, business interruption, costs related to the removal or  
replacement of any products or rework charges) whether or not such  
damages are based on tort (including negligence), warranty, breach of  
contract or any other legal theory.  
Terms and conditions of commercial sale — NXP Semiconductors  
products are sold subject to the general terms and conditions of commercial  
sale, as published at http://www.nxp.com/profile/terms, unless otherwise  
agreed in a valid written individual agreement. In case an individual  
agreement is concluded only the terms and conditions of the respective  
agreement shall apply. NXP Semiconductors hereby expressly objects to  
applying the customer’s general terms and conditions with regard to the  
purchase of NXP Semiconductors products by customer.  
Notwithstanding any damages that customer might incur for any reason  
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards  
customer for the products described herein shall be limited in accordance  
with the Terms and conditions of commercial sale of NXP Semiconductors.  
Right to make changes — NXP Semiconductors reserves the right to make  
changes to information published in this document, including without  
limitation specifications and product descriptions, at any time and without  
notice. This document supersedes and replaces all information supplied prior  
to the publication hereof.  
No offer to sell or license — Nothing in this document may be interpreted or  
construed as an offer to sell products that is open for acceptance or the grant,  
conveyance or implication of any license under any copyrights, patents or  
other industrial or intellectual property rights.  
Export control — This document as well as the item(s) described herein  
may be subject to export control regulations. Export might require a prior  
authorization from national authorities.  
Suitability for use — NXP Semiconductors products are not designed,  
authorized or warranted to be suitable for use in life support, life-critical or  
safety-critical systems or equipment, nor in applications where failure or  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
25 of 27  
 
 
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
Quick reference data — The Quick reference data is an extract of the  
product data given in the Limiting values and Characteristics sections of this  
document, and as such is not complete, exhaustive or legally binding.  
19.4 Trademarks  
Notice: All referenced brands, product names, service names and trademarks  
are the property of their respective owners.  
20. Contact information  
For more information, please visit: http://www.nxp.com  
For sales office addresses, please send an email to: salesaddresses@nxp.com  
TL431_FAM  
All information provided in this document is subject to legal disclaimers.  
© NXP B.V. 2011. All rights reserved.  
Product data sheet  
Rev. 4 — 30 June 2011  
26 of 27  
 
 
TL431 family  
NXP Semiconductors  
Adjustable precision shunt regulator  
21. Contents  
1
General description. . . . . . . . . . . . . . . . . . . . . . 1  
2
Features and benefits . . . . . . . . . . . . . . . . . . . . 2  
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Quick reference data . . . . . . . . . . . . . . . . . . . . . 2  
Ordering information. . . . . . . . . . . . . . . . . . . . . 3  
Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 4  
Pinning information. . . . . . . . . . . . . . . . . . . . . . 5  
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Recommended operating conditions. . . . . . . . 6  
Thermal characteristics . . . . . . . . . . . . . . . . . . 7  
Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Application information. . . . . . . . . . . . . . . . . . 19  
Test information. . . . . . . . . . . . . . . . . . . . . . . . 21  
Quality information . . . . . . . . . . . . . . . . . . . . . 21  
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 21  
Packing information . . . . . . . . . . . . . . . . . . . . 22  
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 24  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
14.1  
15  
16  
17  
18  
19  
Legal information. . . . . . . . . . . . . . . . . . . . . . . 25  
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 25  
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 26  
19.1  
19.2  
19.3  
19.4  
20  
21  
Contact information. . . . . . . . . . . . . . . . . . . . . 26  
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27  
Please be aware that important notices concerning this document and the product(s)  
described herein, have been included in section ‘Legal information’.  
© NXP B.V. 2011.  
All rights reserved.  
For more information, please visit: http://www.nxp.com  
For sales office addresses, please send an email to: salesaddresses@nxp.com  
Date of release: 30 June 2011  
Document identifier: TL431_FAM  
 

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