DATA SHEET www.onsemi.com Programmable Shunt Regulator 1. Ref 2. Anode LM431SA, LM431SB, 3. Cathode 1 LM431SC SOT89 CASE 528AH Description 3 The LM431SA / LM431SB / LM431SC are threeterminal the output adjustable regulators with thermal stability over operating 1. Cathode 2. Ref temperature range. The output voltage can be set any value between 3. Anode 1 2 V (approximately 2.5 V) and 36 V with two external resistors. REF SOT23FL These devices have a typical dynamic output impedance of 0.2 . CASE 318AB Active output circuit provides a sharp turnon characteristic, making 3 these devices excellent replacement for zener diodes in many applications. M32 M3 1. Ref 1. Cathode 2 Features 1 2. Cathode 2. Ref 3. Anode 3. Anode SOT23 Programmable Output Voltage to 36 V CASE 318BM Low Dynamic Output Impedance: 0.2 (Typical) Sink Current Capability: 1.0 to 100 mA Equivalent FullRange Temperature Coefficient of 50 ppm/C (Typical) Temperature Compensated for Operation Over Full Rated Operating Temperature Range Low Output Noise Voltage Fast Turnon Response These Devices are PbFree, Halogen Free/BFR Free and are RoHS Compliant ORDERING INFORMATION Output Voltage Operating (1) Product Number Tolerance Temperature Top Mark Package Shipping LM431SACMFX 2% 25 to +85 C 43A SOT23FL 3L Tape and Reel LM431SACM3X 43L SOT23 3L LM431SACM32X 43G SOT23 3L LM431SBCMFX 1% 43B SOT23FL 3L LM431SBCM3X 43M SOT23 3L LM431SBCM32X 43H SOT23 3L 0.5% LM431SCCMLX 43C SOT89 3L LM431SCCMFX 43C SOT23FL 3L LM431SCCM3X 43N SOT23 3L LM431SCCM32X 43J SOT23 3L LM431SAIMFX 2% 40 to +85 C 43AI SOT23FL 3L LM431SBIMFX 1% 43BI SOT23FL 3L LM431SCIMFX 0.5% 43CI SOT23FL 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. SOT23 and SOT23FL have basically fourcharacter marking except LM431SAIMFX. (3 letters for device code + 1 letter for date code) SOT23FL date code is composed of 1 digit numeric or alphabetic week code adding bar type year code. Semiconductor Components Industries, LLC, 2018 1 Publication Order Number: October, 2021 Rev. 10 LM431SA/DLM431SA, LM431SB, LM431SC BLOCK DIAGRAM Figure 1. Block Diagram ABSOLUTE MAXIMUM RATINGS (T = 25C unless otherwise noted) A Symbol Parameter Value Unit V Cathode Voltage 37 V KA I Cathode current Range (Continuous) 100 to +150 mA KA I Reference Input Current Range 0.05 to +10.00 mA REF (2, 3) R Thermal Resistance Junction Air C/W ML Suffix Package (SOT89) 220 JA MF Suffix Package (SOT23FL) 350 M32, M3 Suffix Package (SOT23) 400 (4, 5) Power Dissipation P ML Suffix Package (SOT89) 560 mW D MF Suffix Package (SOT23FL) 350 M32, M3 Suffix Package (SOT23) 310 T Junction Temperature 150 C J All products except LM431SAIMFX 25 to +85 C Operating Temperature Range T OPR LM431SAIMFX, SBIMFX, SCIMFX 40 to +85 T Storage Temperature Range 65 to +150 C STG Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 2. Thermal resistance test board Size: 1.6 mm x 76.2 mm x 114.3 mm (1S0P) JEDEC Standard: JESD513, JESD517. 3. Assume no ambient airflow. 4. T = 150C ratings apply to ambient temperature at 25C. JMAX 5. Power dissipation calculation: P = (T T ) / R D J A JA. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min. Max. Unit V Cathode Voltage V 36 V KA REF Cathode Current 1 100 mA I KA Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. www.onsemi.com 2