TL1431C [TI]

PRECISION PROGRAMMABLE REFERENCE; 精密可编程参考
TL1431C
型号: TL1431C
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

PRECISION PROGRAMMABLE REFERENCE
精密可编程参考

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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
FEATURES  
0.4% Initial Voltage Tolerance  
0.2-Typical Output Impedance  
Fast Turnon500 ns  
Sink Current Capability1 mA to 100 mA  
Low Reference Current (REF)  
Adjustable Output VoltageVI(ref) to 36 V  
D PACKAGE  
(TOP VIEW)  
JG OR PW PACKAGE  
(TOP VIEW)  
FK PACKAGE  
(TOP VIEW)  
1
2
3
4
8
7
6
5
CATHODE  
ANODE  
ANODE  
NC  
REF  
CATHODE  
NC  
REF  
NC  
ANODE  
NC  
1
2
3
4
8
7
6
5
ANODE  
ANODE  
NC  
NC  
NC  
NC – No internal connection  
ANODE terminals are connected internally  
NC – No internal connection  
.
3
2
1
20 19  
18  
NC  
NC  
NC  
NC  
NC  
NC  
4
5
6
7
8
NC  
17  
16  
15  
NC  
ANODE  
KTP PACKAGE  
(TOP VIEW)  
LP PACKAGE  
(TOP VIEW)  
14 NC  
9 10 11 12 13  
CATHODE  
ANODE  
REF  
CATHODE  
ANODE  
REF  
DESCRIPTION/ORDERING INFORMATION  
The TL1431 is a precision programmable reference with specified thermal stability over automotive, commercial,  
and military temperature ranges. The output voltage can be set to any value between VI(ref) (approximately  
2.5 V) and 36 V with two external resistors (see Figure 16). This device has a typical output impedance of 0.2 .  
Active output circuitry provides a very sharp turnon characteristic, making the device an excellent replacement  
for Zener diodes and other types of references in applications such as onboard regulation, adjustable power  
supplies, and switching power supplies.  
The TL1431C is characterized for operation over the commercial temperature range of 0°C to 70°C. The  
TL1431Q is characterized for operation over the full automotive temperature range of –40°C to 125°C. The  
TL1431M is characterized for operation over the full military temperature range of –55°C to 125°C.  
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.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 1991–2006, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
ORDERING INFORMATION(1)  
TA  
PACKAGE  
Reel of 3000  
ORDERABLE PART NUMBER  
TL1431CKTPR  
TOP-SIDE MARKING  
PowerFLEX™ – KTP  
SOIC – D  
OBSOLETE  
Tube of 75  
TL1431CD  
1431C  
Reel of 2500  
Bulk of 1000  
Reel of 2000  
Tube of 150  
Reel of 2000  
Tube of 75  
TL1431CDR  
TL1431CLP  
TL1431CLPR  
TL1431CPW  
TL1431CPWR  
TL1431QD  
0°C to 70°C  
TO-226 / TO-92 – LP  
TSSOP – PW  
SOIC – D  
TL1431C  
T1431  
TL1431QD  
T1431QPW  
Reel of 2500  
Tube of 150  
Reel of 2000  
Tube of 50  
TL1431QDR  
TL1431QPW  
TL1431QPWR  
TL1431MJG  
TL1431MFK  
–40°C to 125°C  
–55°C to 125°C  
TSSOP – PW  
CDIP – JG  
LCCC – FK  
TL1431MJG  
TL1431MFK  
Tube of 55  
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at  
www.ti.com/sc/package.  
SYMBOL  
REF  
ANODE  
CATHODE  
FUNCTIONAL BLOCK DIAGRAM  
CATHODE  
+
REF  
V
ref  
ANODE  
2
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
EQUIVALENT SCHEMATIC  
1
8
CATHODE  
800  
800 Ω  
20 pF  
REF  
150 Ω  
10 kΩ  
3.28 kΩ  
4 kΩ  
20 pF  
7.2 kΩ  
2.4 kΩ  
1 kΩ  
800 Ω  
2, 3, 6, 7  
ANODE  
A. All component values are nominal.  
B. Pin numbers shown are for the D package.  
Absolute Maximum Ratings(1)  
over operating free-air temperature range (unless otherwise noted)  
MIN  
MAX  
37  
UNIT  
V
VKA  
IKA  
Cathode voltage(2)  
Continuous cathode current range  
Reference input current range  
–100  
–50  
150  
10  
mA  
mA  
II(ref)  
D package  
97  
θJA  
Package thermal impedance(3)(4)  
Package thermal impedance(5)(6)  
LP package  
PW package  
FK package  
JG package  
140  
149  
5.61  
14.5  
150  
260  
150  
°C/W  
θJC  
°C/W  
TJ  
Operating virtual junction temperature  
Lead temperature  
°C  
°C  
°C  
1,6 mm (1/16 in) from case for 10 s  
Tstg  
Storage temperature range  
–65  
(1) 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.  
(2) All voltage values are with respect to ANODE, unless otherwise noted.  
(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.  
(4) The package thermal impedance is calculated in accordance with JESD 51-7.  
(5) Maximum power dissipation is a function of TJ(max), θJC, and TC. The maximum allowable power dissipation at any allowable case  
temperature is PD = (TJ(max) – TC)/θJC. Operating at the absolute maximum TJ of 150°C can affect reliability.  
(6) The package thermal impedance is calculated in accordance with MIL-STD-883.  
3
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
Recommended Operating Conditions  
MIN  
VI(ref)  
1
MAX  
36  
UNIT  
VKA  
IKA  
Cathode voltage  
Cathode current  
V
100  
70  
mA  
TL1431C  
TL1431Q  
TL1431M  
0
TA  
Operating free-air temperature  
–40  
–55  
125  
125  
°C  
Electrical Characteristics  
at specified free-air temperature, IKA = 10 mA (unless otherwise noted)  
TL1431C  
TYP  
TEST  
CIRCUIT  
(1)  
PARAMETER  
TEST CONDITIONS  
TA  
UNIT  
MIN  
2490  
2480  
MAX  
2510  
2520  
25°C  
2500  
VI(ref)  
Reference input voltage  
VKA = VI(ref)  
Figure 1  
Figure 1  
mV  
Full range  
Deviation of reference input  
VI(dev)  
voltage over full temperature VKA = VI(ref)  
Full range  
Full range  
4
20  
–2  
mV  
range(2)  
Ratio of change in reference  
input voltage to the change in VKA = 3 V to 36 V  
cathode voltage  
VI(ref)  
VKA  
Figure 2  
Figure 2  
Figure 2  
–1.1  
1.5  
mV/V  
µA  
25°C  
2.5  
3
II(ref)  
Reference input current  
R1 = 10 k, R2 = ∞  
Full range  
Deviation of reference input  
II(dev)  
current over full temperature R1 = 10 k, R2 = ∞  
Full range  
0.2  
1.2  
µA  
range(2)  
Minimum cathode current for  
VKA = VI(ref)  
Imin  
Ioff  
|zKA  
25°C  
Figure 1  
Figure 3  
Figure 1  
0.45  
0.18  
1
mA  
µA  
regulation  
25°C  
0.5  
2
Off-state cathode current  
Output impedance(3)  
VKA = 36 V, VI(ref) = 0  
Full range  
VKA = VI(ref), f 1 kHz,  
IKA = 1 mA to 100 mA  
|
25°C  
0.2  
0.4  
(1) Full range is 0°C to 70°C for C-suffix devices.  
(2) The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over the  
rated temperature range. The average full-range temperature coefficient of the reference input voltage αVI(ref) is defined as:  
V
(
)
I dev  
× 106  
(
(
V
at 25  
C
°
Max V  
(
)
I ref  
I(ref)  
ppm  
αVI(ref)  
=
(
(
TA  
°C  
V
I(dev)  
where:  
T is the rated operating temperature range of the device.  
A
Min V  
I(ref)  
˙T  
A
αVI(ref) is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature.  
VKA  
IKA  
|zKA| =  
(3) The output impedance is defined as:  
V  
I  
|z'| =  
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:  
,
R1  
R2  
|z |  
1 +  
(
KA  
(
.
which is approximately equal to  
4
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
Electrical Characteristics  
at specified free-air temperature, IKA = 10 mA (unless otherwise noted)  
TL1431Q  
TYP MAX  
2490 2500 2510 2475 2500 2540  
TL1431M  
TEST  
CIRCUIT  
(1)  
PARAMETER  
TEST CONDITIONS  
TA  
UNIT  
MIN  
MIN TYP MAX  
25°C  
VI(ref)  
Reference input voltage VKA = VI(ref)  
Deviation of reference  
Figure 1  
mV  
Full  
range  
2470  
2530 2460  
2550  
Full  
range  
VI(dev)  
input voltage over full  
VKA = VI(ref)  
Figure 1  
Figure 2  
17  
55  
17  
55(3) mV  
temperature range(2)  
Ratio of change in  
reference input voltage  
to the change in  
VI(ref)  
VKA  
Full  
range  
VKA = 3 V to 36 V  
–1.1  
1.5  
–2  
–1.1  
1.5  
–2 mV/V  
2.5  
cathode voltage  
25°C  
2.5  
4
II(ref)  
Reference input current R1 = 10 k, R2 = ∞  
Figure 2  
µA  
Full  
range  
5
Deviation of reference  
Full  
range  
II(dev)  
input current over full  
R1 = 10 k, R2 = ∞  
Figure 2  
Figure 1  
0.5  
2
0.5  
3(3)  
µA  
temperature range(2)  
Minimum cathode  
current for regulation  
Imin  
VKA = VI(ref)  
25°C  
25°C  
0.45  
0.18  
1
0.5  
2
0.45  
0.18  
1
0.5  
2
mA  
Off-state cathode  
current  
Ioff  
VKA = 36 V, VI(ref) = 0  
Figure 3  
Figure 1  
µA  
Full  
range  
VKA = VI(ref), f 1 kHz,  
IKA = 1 mA to 100 mA  
|zKA  
|
Output impedance(4)  
25°C  
0.2  
0.4  
0.2  
0.4  
(1) Full range is –40°C to 125°C for Q-suffix devices and –55°C to 125°C for M-suffix devices.  
(2) The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over the  
rated temperature range. The average full-range temperature coefficient of the reference input voltage αVI(ref) is defined as:  
V
(
)
I dev  
× 106  
(
(
V
at 25  
C
°
Max V  
Min V  
(
)
I ref  
I(ref)  
ppm  
αVI(ref)  
=
(
(
TA  
°C  
V
I(dev)  
where:  
T is the rated operating temperature range of the device.  
A
I(ref)  
˙T  
A
αVI(ref) is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature.  
(3) On products compliant to MIL-PRF-38535, this parameter is not production tested.  
VKA  
IKA  
|zKA| =  
(4) The output impedance is defined as:  
V  
I  
|z'| =  
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:  
,
R1  
R2  
|z |  
1 +  
(
KA  
(
.
which is approximately equal to  
5
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
PARAMETER MEASUREMENT INFORMATION  
V
KA  
Input  
V
KA  
Input  
I
I
KA  
KA  
R1  
I
I(ref)  
V
I(ref)  
V
I(ref)  
R2  
R1  
R2  
I(ref) ǒ1 ) Ǔ) I  
V
+ V  
  R1  
KA  
I(ref)  
Figure 1. Test Circuit for V(KA) = Vref  
Figure 2. Test Circuit for V(KA) > Vref  
Input  
V
KA  
I
off  
Figure 3. Test Circuit for Ioff  
TYPICAL CHARACTERISTICS  
Data at high and low temperatures are applicable only within the recommended operating free-air temperature  
ranges of the various devices.  
Table of Graphs  
GRAPH  
FIGURE  
Reference voltage vs Free-air temperature  
Reference current vs Free-air temperature  
Cathode current vs Cathode voltage  
4
5
6, 7  
8
Off-state cathode current vs Free-air temperature  
Ratio of delta reference voltage to delta cathode voltage vs Free-air temperature  
Equivalent input-noise voltage vs Frequency  
Equivalent input-noise voltage over a 10-second period  
Small-signal voltage amplification vs Frequency  
Reference impedance vs Frequency  
9
10  
11  
12  
13  
14  
15  
Pulse response  
Stability boundary conditions  
6
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
REFERENCE VOLTAGE  
vs  
REFERENCE CURRENT  
vs  
FREE-AIR TEMPERATURE  
FREE-AIR TEMPERATURE  
2.5  
2.52  
I
= 10 mA  
KA  
V
I(ref)  
= V  
KA  
R1 = 10 k  
R2 = ∞  
I
= 10 mA  
KA  
2
1.5  
1
2.51  
2.5  
2.49  
2.48  
0.5  
0
0
75  
− 50 − 25  
25  
50  
100  
125  
− 50 − 25  
0
25  
50  
75  
100  
125  
T
A
− Free-Air Temperature − °C  
T
A
− Free-Air Temperature − °C  
Figure 4.  
Figure 5.  
CATHODE CURRENT  
vs  
CATHODE CURRENT  
vs  
CATHODE VOLTAGE  
CATHODE VOLTAGE  
150  
800  
600  
400  
200  
V
T
= V  
I(ref)  
V
T
= V  
I(ref)  
KA  
KA  
= 25°C  
= 25°C  
A
A
100  
50  
0
− 50  
− 100  
− 150  
0
− 200  
− 3  
− 2  
− 1  
0
1
2
3
−2  
−1  
0
1
2
3
4
V
KA  
− Cathode Voltage − V  
V
KA  
− Cathode Voltage − V  
Figure 6.  
Figure 7.  
7
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
OFF-STATE CATHODE CURRENT  
RATIO OF DELTA REFERENCE VOLTAGE TO  
DELTA CATHODE VOLTAGE  
vs  
vs  
FREE-AIR TEMPERATURE  
0.4  
FREE-AIR TEMPERATURE  
V
V
= 36 V  
−0.85  
KA  
= 0  
V
KA  
= 3 V to 36 V  
I(ref)  
0.35  
0.3  
−0.95  
−1.05  
−1.15  
−1.25  
−1.35  
−1.45  
0.25  
0.2  
0.15  
0.1  
0.05  
0
− 25  
0
25  
50  
75  
100  
125  
−50  
−50 − 25  
0
25  
50  
75  
100  
125  
T
A
− Free-Air Temperature − °C  
T
A
− Free-Air Temperature − °C  
Figure 8.  
Figure 9.  
EQUIVALENT INPUT-NOISE VOLTAGE  
vs  
FREQUENCY  
260  
240  
220  
200  
I
T
= 10 mA  
= 25°C  
O
A
180  
160  
140  
120  
100  
10  
100  
1 k  
10 k  
100 k  
f − Frequency − Hz  
Figure 10.  
8
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
EQUIVALENT INPUT-NOISE VOLTAGE  
OVER A 10-SECOND PERIOD  
6
5
4
3
2
1
0
− 1  
− 2  
− 3  
− 4  
− 5  
− 6  
f = 0.1 to 10 Hz  
I
= 10 mA  
KA  
T
A
= 25°C  
0
2
4
6
8
10  
t − Time − s  
19.1 V  
1 kΩ  
910 Ω  
2000 µF  
V
CC  
V
CC  
500 µF  
TL1431  
(DUT)  
TLE2027  
= 10 V/mV  
820 Ω  
1 µF  
A
V
+
+
TLE2027  
16 Ω  
16 Ω  
1 µF  
16 Ω  
2.2 µF  
160 kΩ  
33 kΩ  
1 MΩ  
CRO  
A
V
= 2 V/V  
0.1 µF  
33 kΩ  
V
EE  
V
EE  
TEST CIRCUIT FOR 0.1-Hz TO 10-Hz EQUIVALENT INPUT-NOISE VOLTAGE  
Figure 11.  
9
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
SMALL-SIGNAL VOLTAGE AMPLIFICATION  
vs  
FREQUENCY  
60  
I
= 10 mA  
KA  
T
A
= 25°C  
Output  
I
(K)  
50  
40  
15 kΩ  
230 Ω  
9 µF  
+
30  
20  
10  
8.25 kΩ  
GND  
TEST CIRCUIT FOR VOLTAGE AMPLIFICATION  
0
1 k  
10 k  
100 k  
1 M  
10 M  
f − Frequency − Hz  
Figure 12.  
REFERENCE IMPEDANCE  
vs  
FREQUENCY  
100  
I
T
= 1 mA to 100 mA  
= 25°C  
KA  
1 kΩ  
A
Output  
I
(K)  
10  
50 Ω  
+
1
GND  
TEST CIRCUIT FOR REFERENCE IMPEDANCE  
0.1  
1 k  
10 k  
100 k  
1 M  
10 M  
f − Frequency − Hz  
Figure 13.  
10  
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
PULSE RESPONSE  
Input  
6
T
A
= 25°C  
V
I
220 Ω  
Output  
5
4
3
2
1
0
Pulse  
Generator  
f = 100 kHz  
50 Ω  
Output  
GND  
TEST CIRCUIT FOR PULSE RESPONSE  
0
1
2
3
4
5
6
7
t − Time − µs  
Figure 14.  
150  
STABILITY BOUNDARY CONDITIONS  
I
KA  
V
I
100  
90  
A-V = V  
+
KA  
I(ref)  
I
T
= 10 mA  
= 25°C  
KA  
B-V = 5 V  
KA  
C
L
V
A
BATT  
C-V = 10 V  
KA  
D-V = 15 V  
KA  
80  
70  
Stable  
60  
50  
B
Stable  
C
TEST CIRCUIT FOR CURVE A  
40  
A
I
R1 =  
10 kΩ  
KA  
30  
20  
10  
0
150 Ω  
D
C
L
V
I
+
V
BATT  
0.001  
0.01  
0.1  
1
10  
R2  
C
L
− Load Capacitance − µF  
TEST CIRCUIT FOR CURVES B, C, AND D  
A. The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ are  
adjusted to establish the initial VKA and IKA conditions, with CL = 0. VBATT and CL then are adjusted to determine the ranges of  
stability.  
Figure 15.  
11  
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
APPLICATION INFORMATION  
Table of Application Circuits  
APPLICATION  
FIGURE  
16  
Shunt regulator  
Single-supply comparator with temperature-compensated threshold  
Precision high-current series regulator  
Output control of a three-terminal fixed regulator  
Higher-current shunt regulator  
Crowbar  
17  
18  
19  
20  
21  
Precision 5-V, 1.5-A, 0.5% regulator  
5-V precision regulator  
22  
23  
PWM converter with 0.5% reference  
Voltage monitor  
24  
25  
Delay timer  
26  
Precision current limiter  
27  
Precision constant-current sink  
28  
R
V
(BATT)  
V
(BATT)  
V
O
R1  
0.1%  
V
O
V
I(ref)  
TL1431  
V
on  
2 V  
V
off  
V  
(BATT)  
R2  
0.1%  
Input  
TL1431  
V
IT  
= 2.5 V  
R1  
R2  
+ ǒ1 ) ǓVI(ref)  
V
GND  
O
Figure 17. Single-Supply Comparator With  
Temperature-Compensated Threshold  
A. R should provide cathode current 1 mA to  
the TL1431 at minimum V(BATT)  
Figure 16. Shunt Regulator  
.
12  
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
V
(BATT)  
V
(BATT)  
In  
Out  
V
O
µA7805  
Common  
R
2N2222  
30  
R1  
R2  
2N2222  
TL1431  
0.01 µF  
4.7 kΩ  
TL1431  
V
O
R1  
0.1%  
R2  
0.1%  
R1  
R2  
R1  
R2  
+ ǒ1 ) ǓVI(ref)  
V
V + ǒ1 ) ǓVI(ref)  
O
Min V = V  
+ 5 V  
I(ref)  
Figure 19. Output Control of a Three-Terminal Fixed  
Regulator  
A. R should provide cathode current 1 mA to  
the TL1431 at minimum V(BATT)  
.
Figure 18. Precision High-Current Series Regulator  
R
V
(BATT)  
V
O
V
O
V
(BATT)  
R1  
R1  
R2  
TL1431  
C
R2  
TL1431  
R1  
R2  
+ ǒ1 ) ǓVI(ref)  
V
R1  
R2  
trip  
+ ǒ1 ) ǓVI(ref)  
V
O
Figure 20. Higher-Current Shunt Regulator  
A. Refer to the stability boundary conditions in  
Figure 15 to determine allowable values for  
C.  
Figure 21. Crowbar  
V
(BATT)  
In  
Out  
V
O
= 5 V  
V
O
= 5 V, 1.5 A, 0.5%  
V
(BATT)  
LM317  
R
b
8.2 k  
27.4 k  
0.1%  
243 Ω  
0.1%  
Adjust  
TL1431  
TL1431  
243 Ω  
0.1%  
27.4 kΩ  
0.1%  
Figure 22. Precision 5-V, 1.5-A, 0.5% Regulator  
A. Rb should provide cathode current 1 mA to  
the TL1431.  
Figure 23. 5-V Precision Regulator  
13  
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TL1431  
PRECISION PROGRAMMABLE REFERENCE  
www.ti.com  
SLVS062KDECEMBER 1991REVISED OCTOBER 2006  
12 V  
6.8 k  
V
CC  
10 kΩ  
5 V +0.5%  
+
10 kΩ  
TL1431  
0.1%  
X
Not  
TL598  
Used  
10 kΩ  
0.1%  
Feedback  
Figure 24. PWM Converter With 0.5% Reference  
R3  
680  
2 kΩ  
V
(BATT)  
12 V  
R1B  
R4  
R1A  
R2A  
R
TL1431  
TL1431  
TL1431  
R2B  
On  
Off  
C
R1B  
Low Limit + ǒ1 ) ǓVI(ref)  
R2B  
LED on When  
12 V  
12 V * V  
Low Limit < V  
< High Limit  
(BATT)  
R1A  
Delay + R   C   I  
High Limit + ǒ1 ) ǓVI(ref)  
I
(
)
R2A  
I(ref)  
Figure 26. Delay Timer  
A. Select R3 and R4 to provide the desired  
LED intensity and cathode current 1 mA to  
the TL1431.  
Figure 25. Voltage Monitor  
R
CL  
0.1%  
V
(BATT)  
I
O
V
(BATT)  
I
O
R1  
TL1431  
TL1431  
R
0.1%  
S
V
I(ref)  
I
+
) I  
O
KA  
R
CL  
V
(BATT)  
R1 +  
V
I
I(ref)  
+
O
I
ǒ Ǔ) I  
O
R
KA  
h
S
FE  
Figure 27. Precision Current Limiter  
Figure 28. Precision Constant-Current Sink  
14  
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PACKAGE OPTION ADDENDUM  
www.ti.com  
6-Dec-2006  
PACKAGING INFORMATION  
Orderable Device  
Status (1)  
Package Package  
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)  
Qty  
Type  
LCCC  
CDIP  
CDIP  
SOIC  
Drawing  
5962-9962001Q2A  
5962-9962001QPA  
5962-9962001VPA  
TL1431CD  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
FK  
JG  
JG  
D
20  
8
1
1
1
TBD  
TBD  
TBD  
POST-PLATE N / A for Pkg Type  
A42 SNPB  
A42 SNPB  
N / A for Pkg Type  
N / A for Pkg Type  
8
8
75 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
TL1431CDE4  
TL1431CDR  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
8
8
8
8
75 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
TL1431CDRE4  
TL1431CDRG4  
2500 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
TL1431CKTPR  
TL1431CLP  
OBSOLETE  
ACTIVE  
PFM  
KTP  
LP  
2
3
TBD  
Call TI  
CU SN  
Call TI  
TO-92  
1000  
1000  
Pb-Free  
(RoHS)  
N / A for Pkg Type  
TL1431CLPE3  
ACTIVE  
TO-92  
LP  
3
Pb-Free  
(RoHS)  
CU SN  
N / A for Pkg Type  
TL1431CLPM  
TL1431CLPR  
OBSOLETE  
ACTIVE  
TO-92  
TO-92  
LP  
LP  
3
3
TBD  
Call TI  
CU SN  
Call TI  
2000  
2000  
Pb-Free  
(RoHS)  
N / A for Pkg Type  
TL1431CLPRE3  
TL1431CPW  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
TO-92  
TSSOP  
TSSOP  
TSSOP  
TSSOP  
LP  
3
8
8
8
8
Pb-Free  
(RoHS)  
CU SN  
N / A for Pkg Type  
PW  
PW  
PW  
PW  
150 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
TL1431CPWE4  
TL1431CPWR  
TL1431CPWRE4  
150 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM  
no Sb/Br)  
TL1431MFK  
TL1431MFKB  
TL1431MJG  
TL1431MJGB  
TL1431QD  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
LCCC  
LCCC  
CDIP  
CDIP  
SOIC  
FK  
FK  
JG  
JG  
D
20  
20  
8
1
1
TBD  
TBD  
TBD  
TBD  
POST-PLATE N / A for Pkg Type  
POST-PLATE N / A for Pkg Type  
1
A42 SNPB  
A42 SNPB  
N / A for Pkg Type  
N / A for Pkg Type  
8
1
8
75  
Pb-Free  
(RoHS)  
CU NIPDAU Level-2-250C-1 YEAR/  
Level-1-235C-UNLIM  
TL1431QDR  
ACTIVE  
SOIC  
D
8
2500  
2000  
Pb-Free  
(RoHS)  
CU NIPDAU Level-2-250C-1 YEAR/  
Level-1-235C-UNLIM  
TL1431QLP  
TL1431QLPR  
TL1431QPWR  
OBSOLETE  
OBSOLETE  
ACTIVE  
TO-92  
TO-92  
TSSOP  
LP  
LP  
3
3
8
TBD  
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
PW  
CU NIPDAU Level-1-250C-UNLIM  
(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.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
6-Dec-2006  
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.  
Addendum-Page 2  
MECHANICAL DATA  
MCER001A – JANUARY 1995 – REVISED JANUARY 1997  
JG (R-GDIP-T8)  
CERAMIC DUAL-IN-LINE  
0.400 (10,16)  
0.355 (9,00)  
8
5
0.280 (7,11)  
0.245 (6,22)  
1
4
0.065 (1,65)  
0.045 (1,14)  
0.310 (7,87)  
0.290 (7,37)  
0.063 (1,60)  
0.015 (0,38)  
0.020 (0,51) MIN  
0.200 (5,08) MAX  
0.130 (3,30) MIN  
Seating Plane  
0.023 (0,58)  
0.015 (0,38)  
0°–15°  
0.100 (2,54)  
0.014 (0,36)  
0.008 (0,20)  
4040107/C 08/96  
NOTES: A. All linear dimensions are in inches (millimeters).  
B. This drawing is subject to change without notice.  
C. This package can be hermetically sealed with a ceramic lid using glass frit.  
D. Index point is provided on cap for terminal identification.  
E. Falls within MIL STD 1835 GDIP1-T8  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
MECHANICAL DATA  
MLCC006B – OCTOBER 1996  
FK (S-CQCC-N**)  
LEADLESS CERAMIC CHIP CARRIER  
28 TERMINAL SHOWN  
A
B
NO. OF  
TERMINALS  
**  
18 17 16 15 14 13 12  
MIN  
MAX  
MIN  
MAX  
0.342  
(8,69)  
0.358  
(9,09)  
0.307  
(7,80)  
0.358  
(9,09)  
19  
20  
11  
10  
9
20  
28  
44  
52  
68  
84  
0.442  
(11,23)  
0.458  
(11,63)  
0.406  
(10,31)  
0.458  
(11,63)  
21  
B SQ  
22  
0.640  
(16,26)  
0.660  
(16,76)  
0.495  
(12,58)  
0.560  
(14,22)  
8
A SQ  
23  
0.739  
(18,78)  
0.761  
(19,32)  
0.495  
(12,58)  
0.560  
(14,22)  
7
24  
25  
6
0.938  
(23,83)  
0.962  
(24,43)  
0.850  
(21,6)  
0.858  
(21,8)  
5
1.141  
(28,99)  
1.165  
(29,59)  
1.047  
(26,6)  
1.063  
(27,0)  
26 27 28  
1
2
3
4
0.080 (2,03)  
0.064 (1,63)  
0.020 (0,51)  
0.010 (0,25)  
0.020 (0,51)  
0.010 (0,25)  
0.055 (1,40)  
0.045 (1,14)  
0.045 (1,14)  
0.035 (0,89)  
0.045 (1,14)  
0.035 (0,89)  
0.028 (0,71)  
0.022 (0,54)  
0.050 (1,27)  
4040140/D 10/96  
NOTES: A. All linear dimensions are in inches (millimeters).  
B. This drawing is subject to change without notice.  
C. This package can be hermetically sealed with a metal lid.  
D. The terminals are gold plated.  
E. Falls within JEDEC MS-004  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
MECHANICAL DATA  
MPSF001F – JANUARY 1996 – REVISED JANUARY 2002  
KTP (R-PSFM-G2)  
PowerFLEX PLASTIC FLANGE-MOUNT PACKAGE  
0.080 (2,03)  
0.070 (1,78)  
0.243 (6,17)  
0.233 (5,91)  
0.228 (5,79)  
0.218 (5,54)  
0.050 (1,27)  
0.040 (1,02)  
0.130 (3,30) NOM  
0.010 (0,25) NOM  
Thermal Tab  
(See Note C)  
0.215 (5,46)  
0.287 (7,29)  
0.277 (7,03)  
NOM  
0.247 (6,27)  
0.237 (6,02)  
0.381 (9,68)  
0.371 (9,42)  
0.100 (2,54)  
0.090 (2,29)  
0.032 (0,81) MAX  
Seating Plane  
0.004 (0,10)  
0.090 (2,29)  
0.180 (4,57)  
0.005 (0,13)  
0.001 (0,02)  
0.031 (0,79)  
0.025 (0,63)  
0.010 (0,25)  
M
0.047 (1,19)  
0.037 (0,94)  
0.010 (0,25) NOM  
Gage Plane  
0.010 (0,25)  
2°ā6°  
4073388/M 01/02  
NOTES: A. All linear dimensions are in inches (millimeters).  
B. This drawing is subject to change without notice.  
C. The center lead is in electrical contact with the thermal tab.  
D. Dimensions do not include mold protrusions, not to exceed 0.006 (0,15).  
E. Falls within JEDEC TO-252 variation AC.  
PowerFLEX is a trademark of Texas Instruments.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
MECHANICAL DATA  
MSOT002A – OCTOBER 1994 – REVISED NOVEMBER 2001  
LP (O-PBCY-W3)  
PLASTIC CYLINDRICAL PACKAGE  
0.205 (5,21)  
0.175 (4,44)  
0.165 (4,19)  
0.125 (3,17)  
DIA  
0.210 (5,34)  
0.170 (4,32)  
Seating  
Plane  
0.157 (4,00) MAX  
0.050 (1,27)  
C
0.500 (12,70) MIN  
0.022 (0,56)  
0.016 (0,41)  
0.016 (0,41)  
0.014 (0,35)  
0.104 (2,65)  
FORMED LEAD OPTION  
STRAIGHT LEAD OPTION  
D
0.135 (3,43) MIN  
0.105 (2,67)  
0.095 (2,41)  
0.055 (1,40)  
0.045 (1,14)  
1
2
3
0.105 (2,67)  
0.080 (2,03)  
0.105 (2,67)  
0.080 (2,03)  
4040001-2/C 10/01  
NOTES: A. All linear dimensions are in inches (millimeters).  
B. This drawing is subject to change without notice.  
C. Lead dimensions are not controlled within this area  
D. FAlls within JEDEC TO -226 Variation AA (TO-226 replaces TO-92)  
E. Shipping Method:  
Straight lead option available in bulk pack only.  
Formed lead option available in tape & reel or ammo pack.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
MECHANICAL DATA  
MSOT002A OCTOBER 1994 REVISED NOVEMBER 2001  
LP (O-PBCY-W3)  
PLASTIC CYLINDRICAL PACKAGE  
0.539 (13,70)  
0.460 (11,70)  
1.260 (32,00)  
0.905 (23,00)  
0.650 (16,50)  
0.610 (15,50)  
0.020 (0,50) MIN  
0.098 (2,50)  
0.384 (9,75)  
0.335 (8,50)  
0.748 (19,00)  
0.217 (5,50)  
0.748 (19,00)  
0.689 (17,50)  
0.433 (11,00)  
0.335 (8,50)  
0.114 (2,90)  
0.094 (2,40)  
0.114 (2,90)  
0.094 (2,40)  
0.169 (4,30)  
0.146 (3,70)  
DIA  
0.266 (6,75)  
0.234 (5,95)  
0.512 (13,00)  
0.488 (12,40)  
TAPE & REEL  
4040001-3/C 10/01  
NOTES: A. All linear dimensions are in inches (millimeters).  
B. This drawing is subject to change without notice.  
C. Tape and Reel information for the Format Lead Option package.  
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
MECHANICAL DATA  
MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999  
PW (R-PDSO-G**)  
PLASTIC SMALL-OUTLINE PACKAGE  
14 PINS SHOWN  
0,30  
0,19  
M
0,10  
0,65  
14  
8
0,15 NOM  
4,50  
4,30  
6,60  
6,20  
Gage Plane  
0,25  
1
7
0°8°  
A
0,75  
0,50  
Seating Plane  
0,10  
0,15  
0,05  
1,20 MAX  
PINS **  
8
14  
16  
20  
24  
28  
DIM  
3,10  
2,90  
5,10  
4,90  
5,10  
4,90  
6,60  
6,40  
7,90  
9,80  
9,60  
A MAX  
A MIN  
7,70  
4040064/F 01/97  
NOTES: A. All linear dimensions are in millimeters.  
B. This drawing is subject to change without notice.  
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.  
D. Falls within JEDEC MO-153  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
IMPORTANT NOTICE  
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,  
enhancements, improvements, and other changes to its products and services at any time and to discontinue  
any product or service without notice. Customers should obtain the latest relevant information before placing  
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms  
and conditions of sale supplied at the time of order acknowledgment.  
TI warrants performance of its hardware products to the specifications applicable at the time of sale in  
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI  
deems necessary to support this warranty. Except where mandated by government requirements, testing of all  
parameters of each product is not necessarily performed.  
TI assumes no liability for applications assistance or customer product design. Customers are responsible for  
their products and applications using TI components. To minimize the risks associated with customer products  
and applications, customers should provide adequate design and operating safeguards.  
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,  
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Following are URLs where you can obtain information on other Texas Instruments products and application  
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Products  
Applications  
Audio  
Amplifiers  
amplifier.ti.com  
www.ti.com/audio  
Data Converters  
dataconverter.ti.com  
Automotive  
www.ti.com/automotive  
DSP  
dsp.ti.com  
Broadband  
Digital Control  
Military  
www.ti.com/broadband  
www.ti.com/digitalcontrol  
www.ti.com/military  
Interface  
Logic  
interface.ti.com  
logic.ti.com  
Power Mgmt  
Microcontrollers  
power.ti.com  
Optical Networking  
Security  
www.ti.com/opticalnetwork  
www.ti.com/security  
www.ti.com/telephony  
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microcontroller.ti.com  
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Wireless  
www.ti.com/wireless  
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Copyright 2006, Texas Instruments Incorporated  

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