TL431 Datasheet, PDF (1/12 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

THE IN F I N I T E POWER OF INNOVATION
TL431/TL431A/TL431B
PRECISION PROGRAMMABLE REFERENCES
PRODUCTION DATA SHEET
DESCRIPTION
The TL431/TL431A/TL431B series
precision adjustable three terminal shunt
voltage regulators are pin-to-pin
compatible with the industry standard
TL431. The output voltage of this
reference is programmable by using two
external resistors from 2.5V to 36V.
These devices offer low output
impedance for improved load regulation.
The typical output impedance of these
devices is 200mΩ. These devices find
application in the feedback path of
switching power supplies, OVP
crowbar circuits, reference for A/D,
D/A, and as zener diodes with
improved turn-on characteristics.
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
PRECISION PROGRAMMABLE REFERENCES
KEY FEATURES
W INITIAL VOLTAGE REFERENCE ACCURACY OF
0.4% (TL431B)
W SINK CURRENT CAPABILITY 1mA to 100mA
W TYPICAL OUTPUT DYNAMIC IMPEDANCE
LESS THAN 200mΩ;
TYPICAL OUTPUT IMPEDANCE OF THE
TL431B LESS THAN 100mΩ
W ADJUSTABLE OUTPUT VOLTAGE FROM 2.5V
TO 36V
W AVAILABLE IN SURFACE-MOUNT PACKAGES
W LOW OUTPUT NOISE
W TYPICAL EQUIVALENT FULL RANGE
TEMPERATURE COEFFICIENT OF 30ppm/°C
W DIRECT PIN-TO-PIN REPLACEMENT FOR
INDUSTRY STANDARD TL431 AND TL1431
V_IN
TL431/A
& TL431B
V_OUT
R1
V_O = ^1 +
R1 
R2 ^
* ^V_REF
R2
PACKAGE ORDER INFORMATION
T_A (°C)
Initial
Tolerance
DM
Plastic
8-pin
SOIC
LP
Plastic
3-pin
TO-92
0 to 70
-40 to 85
2%
1%
0.4%
2%
1%
0.4%
TL431CDM
TL431ACDM
TL431BCDM
TL431IDM
TL431AIDM
TL431BIDM
TL431CLP
TL431ACLP
TL431BCLP
TL431ILP
TL431AILP
TL431BILP
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. TL431CDMT)
TO-92 (LP) package also available in ammo-pack.
LINFINITY MICROELECTRONICS INC.
Copyright © 1999
Rev. 1.3 9/99
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: [phone]
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