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TLV431ALPRP

P1-P3P4-P6P7-P9P10-P12P13-P14
1 Publication Order Number:
TLV431A/D
© Semiconductor Components Industries, LLC, 2008
January, 2008 - Rev. 10
TLV431A, TLV431B
Low Voltage Precision
Adjustable Shunt Regulator
The TLV431A and B series are precision low voltage shunt
regulators that are programmable over a wide voltage range of 1.24 V
to 16 V. The TLV431A series features a guaranteed reference accuracy
of ±1.0% at 25°C and ±2.0% over the entire industrial temperature
range of -40°C to 85°C. For TLV431B series, the accuracy is even
higher, it's ±0.5% and ±1.0% respectively. These devices exhibit a
sharp low current turn-on characteristic with a low dynamic
impedance of 0.20 W over an operating current range of 100 mA to
20 mA. This combination of features makes this series an excellent
replacement for zener diodes in numerous applications circuits that
require a precise reference voltage. When combined with an
optocoupler, the TLV431A/B can be used as an error amplifier for
controlling the feedback loop in isolated low output voltage (3.0 V to
3.3 V) switching power supplies. These devices are available in
economical TO-92-3 and micro size TSOP-5 and
SOT-23-3 packages.
Features
•Programmable Output Voltage Range of 1.24 V to 16 V
•Voltage Reference Tolerance "1.0% for A Series and
"0.5% for B Series
•Sharp Low Current Turn-On Characteristic
•Low Dynamic Output Impedance of 0.20 W from 100 mA to 20 mA
•Wide Operating Current Range of 50 mA to 20 mA
•Micro Miniature TSOP-5, SOT-23-3 and TO-92-3 Packages
•Pb-Free Packages are Available
Applications
•Low Output Voltage (3.0 V to 3.3 V) Switching Power Supply
Error Amplifier
•Adjustable Voltage or Current Linear and Switching Power Supplies
•Voltage Monitoring
•Current Source and Sink Circuits
•Analog and Digital Circuits Requiring Precision References
•Low Voltage Zener Diode Replacements
-
+
1.24 V
ref
Reference (R)
Cathode (K)
Anode (A)
Figure 1. Representative Block Diagram
TO-92
LP SUFFIX
CASE 29
TSOP-5
SN SUFFIX
CASE 483
1
2
3
5
4
SOT-23-3
SN1 SUFFIX
CASE 318
1
2
3
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
ORDERING INFORMATION
See general marking information in the device marking
section on page 10 of this data sheet.
DEVICE MARKING INFORMATION
AND PIN CONNECTIONS
http://onsemi.com
1
2
3
1
2
BENT LEAD
TAPE & REEL
AMMO PACK
STRAIGHT LEAD
BULK PACK
3
TLV431A, TLV431B
http://onsemi.com
2
Reference (R)
Cathode (K)
Anode (A)
Anode (A)
Reference (R)
Cathode (K)
The device contains 13 active transistors.
Device Symbol
Figure 2. Representative Device Symbol and Schematic Diagram
MAXIMUM RATINGS
(Full operating ambient temperature range applies, unless otherwise noted)
Rating
Symbol Value Unit
Cathode to Anode Voltage V
KA
18 V
Cathode Current Range, Continuous I
K
-20 to 25 mA
Reference Input Current Range, Continuous I
ref
*0.05 to 10 mA
Thermal Characteristics
LP Suffix Package, TO-92-3 Package
Thermal Resistance, Junction-to-Ambient
Thermal Resistance, Junction-to-Case
SN Suffix Package, TSOP-5 Package
Thermal Resistance, Junction-to-Ambient
SN1 Suffix Package, SOT-23-3 Package
Thermal Resistance, Junction-to-Ambient
R
q
JA
R
q
JC
R
q
JA
R
q
JA
178
83
226
491
°C/W
Operating Junction Temperature T
J
150 °C
Operating Ambient Temperature Range T
A
*40 to 85 °C
Storage Temperature Range T
stg
*65 to 150 °C
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
NOTE: This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL-STD-883,
Method 3015. Machine Model Method 200 V.
P
D
+
T
J(max)
* T
A
R
qJA
RECOMMENDED OPERATING CONDITIONS
Condition Symbol Min Max Unit
Cathode to Anode Voltage V
KA
V
ref
16 V
Cathode Current I
K
0.1 20 mA
TLV431A, TLV431B
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (T
A
= 25°C unless otherwise noted)
Characteristic
Symbol
TLV431A TLV431B
Unit
Min Typ Max Min Typ Max
Reference Voltage (Figure 3)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= 25°C)
(T
A
= T
low
to T
high
, Note 1)
V
ref
1.228
1.215
1.240
-
1.252
1.265
1.234
1.228
1.240
-
1.246
1.252
V
Reference Input Voltage Deviation Over Temperature (Figure 3)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= T
low
to T
high
, Note 1)
DV
ref
- 7.2 20 - 7.2 20
mV
Ration of Reference Input Voltage Change to Cathode Voltage
Change (Figure 4)
(V
KA
= V
ref
to 16 V, I
K
= 10 mA)
DV
ref
DV
KA
- -0.6 -1.5 - -0.6 -1.5
mV
V
Reference Terminal Current (Figure 4)
(I
K
= 10 mA, R1 = 10 kW, R2 = open)
I
ref
- 0.15 0.3 - 0.15 0.3
mA
Reference Input Current Deviation Over Temperature (Figure 4)
(I
K
= 10 mA, R1 = 10 kW, R2 = open, Notes 1, 2)
DI
ref
- 0.04 0.08 - 0.04 0.08
mA
Minimum Cathode Current for Regulation (Figure 3) I
K(min
) - 55 80 - 55 80
mA
Off-State Cathode Current (Figure 5)
(V
KA
= 6.0 V, V
ref
= 0)
(V
KA
= 16 V, V
ref
= 0)
I
K(off)
-
-
0.01
0.012
0.04
0.05
-
-
0.01
0.012
0.04
0.05
mA
Dynamic Impedance (Figure 3)
(V
KA
= V
ref
, I
K
=0.1 mA to 20 mA, f ≤ 1.0 kHz, Note 3)
|Z
KA
|
- 0.25 0.4 - 0.25 0.4
W
1. Ambient temperature range: T
low
= *40°C, T
high
= 85°C.
2. The deviation parameters DV
ref
and DI
ref
are defined as the difference between the maximum value and minimum value obtained over the
full operating ambient temperature range that applied.
V
ref
Max
V
ref
Min
T
1
T
2
Ambient Temperature
DV
ref
= V
ref
Max - V
ref
Min
DT
A
= T
2
- T
1
The average temperature coefficient of the reference input voltage, aV
ref
is defined as:
αV
ref
ǒ
ppm
°C
Ǔ
+
ǒ
(DV
ref
)
V
ref
(T
A
+25°C)
10
6
Ǔ
DT
A
aV
ref
can be positive or negative depending on whether V
ref
Min or V
ref
Max occurs at the lower ambient temperature, refer to Figure 8.
Example: DV
ref
= 7.2 mV and the slope is positive,
Example: V
ref
@ 25°C = 1.241 V
Example: DT
A
= 125°C
αV
ref
ǒ
ppm
°C
Ǔ
+
0.0072
1.241
125
+ 46ppmń°C
10
6
3. The dynamic impedance Z
KA
is defined as:
⏐Z
KA
⏐ +
DV
KA
DI
K
When the device is operating with two external resistors, R1 and R2, (refer to Figure 4) the total dynamic impedance of the circuit is given by:
⏐Z
KA
′⏐ + ⏐Z
KA
⏐
ǒ
1 )
R1
R2
Ǔ
P1-P3P4-P6P7-P9P10-P12P13-P14

TLV431ALPRP

Mfr. #:
Buy TLV431ALPRP
Manufacturer:
ON Semiconductor
Description:
Voltage References 1.24-16V ADJ 1-100mA
Lifecycle:
New from this manufacturer.
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