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© Semiconductor Components Industries, LLC, 2018
March, 2021 − Rev. 9
1 Publication Order Number:
LM431SA/D
Programmable Shunt
Regulator
LM431SA, LM431SB,
LM431SC
Description
The LM431SA / LM431SB / LM431SC are three−terminal the
output adjustable regulators with thermal stability over operating
temperature range. The output voltage can be set any value between
V
REF
(approximately 2.5 V) and 36 V with two external resistors.
These devices have a typical dynamic output impedance of 0.2 W.
Active output circuit provides a sharp turn−on characteristic, making
these devices excellent replacement for zener diodes in many
applications.
Features
• Programmable Output Voltage to 36 V
• Low Dynamic Output Impedance: 0.2 W (Typical)
• Sink Current Capability: 1.0 to 100 mA
• Equivalent Full−Range Temperature Coefficient of 50 ppm/°C
(Typical)
• Temperature Compensated for Operation Over Full Rated Operating
Temperature Range
• Low Output Noise Voltage
• Fast Turn−on Response
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
ORDERING INFORMATION
Product Number
Output Voltage
Tolerance
Operating
Temperature
Top Mark
(1)
Package Shipping
†
LM431SACMFX
2%
−25 to +85_C
43A □ SOT−23FL 3L
Tape and Reel
LM431SACM3X 43L ◎ SOT−23 3L
LM431SACM32X 43G ◎ SOT−23 3L
LM431SBCMLX
1%
43B SOT−89 3L
LM431SBCMFX 43B □ SOT−23FL 3L
LM431SBCM3X 43M ◎ SOT−23 3L
LM431SBCM32X 43H ◎ SOT−23 3L
LM431SCCMLX
0.5%
43C SOT−89 3L
LM431SCCMFX 43C □ SOT−23FL 3L
LM431SCCM3X 43N ◎ SOT−23 3L
LM431SCCM32X 43J ◎ SOT−23 3L
LM431SAIMFX 2%
−40 to +85_C
43AI SOT−23FL 3L
LM431SBIMFX 1% 43BI SOT−23FL 3L
LM431SCIMFX 0.5% 43CI SOT−23FL 3L
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
1. SOT−23 and SOT−23FL have basically four−character marking except LM431SAIMFX. (3 letters for device code + 1 letter for date code)
SOT−23FL date code is composed of 1 digit numeric or alphabetic week code adding bar−type year code.
www.onsemi.com
SOT−89
CASE 528AH
1
1
2
3
SOT−23FL
CASE 318AB
SOT−23
CASE 318BM
1
2
3
1. Ref
2. Anode
3. Cathode
1. Cathode
2. Ref
3. Anode
M32
1. Ref
2. Cathode
3. Anode
M3
1. Cathode
2. Ref
3. Anode
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