Philips TL431IP, TL431ILPU, TL431ID, TL431ILP, TL431AIPN Datasheet
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INTEGRATED CIRCUITS
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
Adjustable precision shunt regulators
Product specification 1997 Feb 25
Philips Semiconductors Product specification
Adjustable precision shunt regulators
DESCRIPTION
The TL431 and TL431A are 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 V
external resistors (see Figure 4). These devices have a typical
output impedance of 0.2Ω. 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.
The TL431C and TL431AC are characterized for operation from
0°C to +70°C; the TL431I and TL431AI are characterized for
operation from –40°C to +85°C.
FEATURES
•Equivalent full-range temperature coefficient: 30ppm/°C
•0.2Ω typical output impedance
•Sink current capability: 1mA to 100mA
•Low output noise
•Adjustable output voltage: V
(approximately 2.5V) and 36V with two
REF
to 36V
REF
TL431C, TL431AC, TL431I,
PIN CONFIGURATIONS
M, D Package
1
2
ANODE
3
ANODE
45
NC
N, P Package
1
2
NC
3
NC
45
NC
Z, LP, U Package
TL431AI, LM431AC
TOP VIEW
REF
8CATHODE
ANODE
7
ANODE
6
NC
SOT96-1
TOP VIEW
REF
8CATHODE
NC
7
ANODE
6
NC
SOT97-1
CATHODE
ANODE
SOT54
REF
SL01167
Figure 1. Pin Configuration
ORDERING INFORMATION
DESCRIPTION
3-Pin Plastic TO92
3-Pin Plastic TO92
3-Pin Plastic TO92
3-Pin Plastic TO92
3-Pin Plastic TO92
2
2
2
2
2
TEMPERATURE
RANGE
0°C to +70°C TL431CLP TL431CLPU SOT54
0°C to +70°C TL431ACLP TL431ACLPU SOT54
–40°C to +85°C TL431ILP TL431ILPU SOT54
–40°C to +85°C TL431AILP TL431AILPU SOT54
0°C to +70°C LM431ACZ LM431ACZU SOT54
8-Pin Plastic Small Outline (SO) package 0°C to +70°C TL431CD TL431CD SOT96-1
8-Pin Plastic Small Outline (SO) package –40°C to +85°C TL431ID TL431ID SOT96-1
8-Pin Plastic Small Outline (SO) package 0°C to +70°C TL431ACD TL431ACD SOT96-1
8-Pin Plastic Small Outline (SO) package –40°C to +85°C TL431AID TL431AID SOT96-1
8-Pin Plastic Small Outline (SO) package 0°C to +70°C LM431ACM LM431ACMD SOT96-1
8-Pin Plastic Dual In-Line package (DIP) 0°C to +70°C TL431CP TL431CPN SOT97-1
8-Pin Plastic Dual In-Line package (DIP) –40°C to +85°C TL431IP TL431IPN SOT97-1
8-Pin Plastic Dual In-Line package (DIP) 0°C to +70°C TL431ACP TL431ACPN SOT97-1
8-Pin Plastic Dual In-Line package (DIP) –40°C to +85°C TL431AIP TL431AIPN SOT97-1
NOTE:
1. SYMBOL INFORMATION: Parts will be marked with product name including temperature and electrical grade desginators, but not the
package identifier.
2. TO92 is normally shipped in bulk, i.e., in plastic bags (containing 1,000 parts), 5 bags per box. Tape and reel (or ammo box) is an option.
See page 15 for information.
INDUSTRY STANDARD
PART NUMBER
ORDER CODE DWG #
1997 Feb 25 853–1927 17795
2
Philips Semiconductors Product specification
Adjustable precision shunt regulators
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
ABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER RATING UNITS
V
KA
T
amb
T
STG
NOTE:
1. Voltage values are with respect to the anode terminal unless otherwise noted.
RECOMMENDED OPERATING CONDITIONS
SYMBOL PARAMETER MIN MAX UNITS
V
KA
I
K
Cathode voltage (see Note 1) 37 V
Continuous cathode current range –100 to +150 mA
Reference input current range 0.05 to 10 mA
Operating free-air temperature range
C suffix 0 to +70 °C
I suffix –40 to +85 °C
Temperature storage range –65 to 150 °C
Lead temperature 1.6mm (1/16 in.) from case for 10 sec: D or P pkgs 260 °C
Lead temperature 1.6mm (1/16 in.) from case for 60 sec: LP pkg 300 °C
Cathode voltage V
REF
36 V
Cathode current 1 100 mA
Table 1. Dissipation Rating Table – Free-Air Temperature
Package
Derating Factor Above T
= 25°C
amb
D 5.8mW/°C 725mW 464mW 429mW
LP 6.2mW/°C 775mW 496mW 403mW
P 8.0mW/°C 1000mW 640mW 520mW
CATHODE
3.28K
R11
2.4K
Q5
R5
REF
T
Power Rating
QD6
R10
7.2K
amb
= 25°C
Q4
C2
20p
Q7
Q9
R4
800
R7
320
T
amb
Power Rating
R3
800
Q3
= 70°C
C1
20p
Q2
R2
150
R1
10K
T
= 85°C
amb
Power Rating
Q1
Qq1
1997 Feb 25
ANODE
Q11
Q10
R8
1000
800
R9
Figure 2. Equivalent Schematic
3
Q8
QD2
SL01188
Philips Semiconductors Product specification
CKT
REF
in ut voltage to the change
Fig. 4
I
10mA
mV/V
CKT
REF
in ut voltage to the change
Fig. 4
I
10mA
mV/V
Adjustable precision shunt regulators
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
DC ELECTRICAL CHARACTERISTICS
25°C free-air temperature, unless otherwise stated.
V
REF(dev)
LIMITS
LIMITS
, is defined as:
REF
SYMBOL PARAMETER
TEST
TEST CONDITIONS
TL431AC TL431C/LM431AC
MIN TYP MAX MIN TYP MAX
V
V
REF(dev)
V
V
I
REF
I
REF(dev)
I
MIN
I
OFF
| ZKA | Dynamic impedance
Reference input voltage Fig. 3 VKA = V
REF
Deviation of reference input
voltage over full
temperature range
Ratio of change in reference
REF
p
in cathode voltage
KA
3
Fig. 3
VKA = V
T
amb
=
K
, IK = 10mA 2470 2495 2520 2440 2495 2550 mV
REF
, IK = 10mA,
REF
= full range
∆VKA = 10V – V
2
REF
4 15 4 17 mV
–1.4 –2.7 –1.4 –2.7
∆VKA = 36V – 10V –1 –2 –1 –2
Reference input current Fig. 4 IK = 10mA, R1 = 10kΩ, R2 = ∞ 2 4 2 4 µA
Deviation of reference input
current over full temperature
3
range
Minimum cathode current
for regulation
Off-state cathode current Fig. 5 VKA = 36V, V
4
IK = 10mA, R1 = 10kΩ, R2 = ∞,
Fig. 4
Fig. 3 VKA = V
Fig. 3
= full range
T
amb
VKA = V
f ≤ 1kHz
REF
, IK = 1mA to 100mA,
REF
2
0.8 1.2 0.4 1.2 µA
0.4 0.6 0.4 1 mA
= 0 0.1 0.5 0.1 1 µA
REF
0.2 0.5 0.2 0.5 Ω
25°C free-air temperature, unless otherwise stated.
SYMBOL PARAMETER
TEST
TEST CONDITIONS
TL431AI TL431I
MIN TYP MAX MIN TYP MAX
V
V
REF(dev)
V
V
I
REF
I
REF(dev)
I
MIN
I
OFF
| ZKA | Dynamic impedance
Reference input voltage Fig. 3 VKA = V
REF
Deviation of reference input
voltage over full
temperature range
Ratio of change in reference
REF
p
in cathode voltage
KA
3
Fig. 3
VKA = V
T
amb
=
K
, IK = 10mA 2470 2495 2520 2440 2495 2550 mV
REF
, IK = 10mA,
REF
= full range
∆VKA = 10V – V
2
REF
5 25 5 30 mV
–1.4 –2.7 –1.4 –2.7
∆VKA = 36V – 10V –1 –2 –1 –2
Reference input current Fig. 4 IK = 10mA, R1 = 10kΩ, R2 = ∞ 2 4 2 4 µA
Deviation of reference input
current over full temperature
3
range
Minimum cathode current
for regulation
Off-state cathode current Fig. 5 VKA = 36V, V
4
IK = 10mA, R1 = 10kΩ, R2 = ∞,
Fig. 4
Fig. 3 VKA = V
Fig. 3
= full range
T
amb
VKA = V
f ≤ 1kHz
REF
, IK = 1mA to 100mA,
REF
2
0.8 2.5 0.8 2.5 µA
0.4 0.7 0.4 1 µA
= 0 0.1 0.5 0.1 1 µA
REF
0.2 0.5 0.2 0.5 Ω
NOTES:
2. Full temperature range is –40°C to +85°C for the TL431I and TL431AI, and 0°C to +70°C for the TL431C and TL431AC.
3. The deviation parameters V
the rated termperature range. The average full-range temperature coefficient of the reference input voltage, αV
V
V
| V
REF
|
ppm
degC
REF
REF(dev)
REF(dev)
at 25oC
T
amb
and I
10
are defined as the differences between the maximum and minimum values obtained over
REF(dev)
Max V
Min V
REF
REF
6
UNIT
UNIT
where ∆T
1997 Feb 25
is the rated operating free-air temperature range of the device.
amb
∆T
amb
4
Philips Semiconductors Product specification
Adjustable precision shunt regulators
TL431C, TL431AC, TL431I,
TL431AI, LM431AC
can be positive or negative depending on whether minimum V
αV
REF
Example: Max V
REF
| +
| V
Because minimum V
4. The dynamic impedance is defined as:
= 2496mV at 30°C, Min V
REF
4mV
ǒ
2495mV
70oC
6
Ǔ
@ 10
+ 23ppmńoC
occurs at the lower temperature, the coefficient is positive.
REF
|Z
= 2492mV at 0°C, V
REF
V
| +
KA
I
KA
When the device is operating with two external resistors, (see Figure xx), the total dynamic impedance of the circuit is given by:
|ZȀ|+
V
[|ZKA|ǒ1 )
I
R1
R2
Ǔ
P ARAMETER MEASUREMENT INFORMATION
INPUT
V
ref
Figure 3. Test Circuit for VKA = V
V
KA
I
K
SL01177
ref
of maximum V
REF
= 2495mV at 25°C, DTA = 70°C for TL431C.
REF
, respectively, occurs at the lower temperature.
REF
INPUT V
Figure 5. Test Circuit for I
I
off
KA
SL01179
OFF
INPUT
R1
I
ref
R2
V
ref
I
K
VKA+ V
V
KA
ǒ
1 )
ref
Figure 4. Test Circuit for VKA > V
R1
Ǔ
) I
R1
ref
R2
SL01178
ref
1997 Feb 25
5
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