31BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM LM431CCMX/ 431CCM LM431BCMX/ 431BCM LM431ACMX/ LM431ACM LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM LM431CIMX/ 431CIM LM431BIMX/ 431BIM LM431AIMX/ LM431AIM LM431CCM3/ N1B LM431BCM3/ N1D LM431ACM3/ N1F LM431CCM3X/ N1B LM431BCM3X/ N1D LM431ACM3X/ N1F LM431CIM3 N1A LM431BIM3 N1C LM431AIM3 N1E LM431CIM3X N1A LM431BIM3X N1C LM431AIM3X N1E Transport Media NSC Drawing Rails Z03A Rails 0C to +70C Tape & Reel M08A Rails -40C to +85C Tape &Reel Rails 0C to +70C Tape & Reel MF03A Rails -40C to +85C Tape &Reel Symbol and Functional Diagrams 1005599 1005555 www.national.com 2 LM431 DC Test Circuits 1005504 1005505 Note: VZ = VREF (1 + R1/R2) + IREF* R1 FIGURE 1. Test Circuit for VZ = VREF FIGURE 2. Test Circuit for VZ > VREF 1005506 FIGURE 3. Test Circuit for Off-State Current 3 www.national.com LM431 Operating Conditions Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are

S & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 N1C LM431BIMX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 431 BIM LM431CCM/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 431 CCM LM431CCM3/NOPB ACTIVE SOT-23 DBZ 3 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 N1B LM431CCM3X NRND SOT-23 DBZ 3 3000 TBD Call TI Call TI -40 to 85 N1B LM431CCM3X/NOPB ACTIVE SOT-23 DBZ 3 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 N1B LM431CCZ/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS & no Sb/Br) SN | CU SN N / A for Pkg Type -40 to 85 LM431 CCZ Addendum-Page 2 Samples PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (C) Device Marking (4/5) LM431CIM NRND SOIC D 8 95 TBD Call TI Call TI -40 to 85 431 CIM LM431CIM/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no

10055-1 Top View Order Number LM431ACZ, LM431AIZ, LM431BCZ, LM431BIZ, LM431CCZ or LM431CIZ TL/H/10055 - 28 Top View Top View Order Number LM431ACM, LM431AIM, LM431BCM, LM431BIM, LM431CCM or LM431CIM Order Number LM431ACM3, LM431AIM3, LM431BCM3, LM431BIM3, LM431CCM3 or LM431CIM3 Ordering Information* Typical Accuracy Package 0.5% Temperature Range 1% 2% TO-92 LM431CCZ LM431CIZ LM431BCZ LM431BIZ LM431ACZ LM431AIZ 0 C to a 70 C b 40 C to a 85 C SO-8 LM431CCM LM431CIM LM431BCM LM431BIM LM431ACM LM431AIM 0 C to a 70 C b 40 C to a 85 C SOT-23 LM431CCM3 LM431CIM3 LM431BCM3 LM431BIM3 LM431ACM3 LM431AIM3 0 C to a 70 C b 40 C to a 85 C *See Table 1 for package marking for SOT-23. C1996 National Semiconductor Corporation TL/H/10055 RRD-B30M17/Printed in U. S. A. http://www.national.com LM431 Adjustable Precision Zener Shunt Regulator December 1996 Absolute Maximum Ratings Cathode Voltage If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office

31BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM LM431CCMX/ 431CCM LM431BCMX/ LM431ACMX/ 431BCM LM431ACM LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM LM431CIMX/ 431CIM LM431BIMX/ 431BIM LM431AIMX/ LM431AIM LM431CCM3/ N1B LM431BCM3/ LM431ACM3/ N1D N1F LM431BIM3 N1C - - Tape & Reel M08A Rails -40C to +85C Tape &Reel Rails 0C to +70C Tape & Reel MF03A LM431AIM3 N1E Rails -40C to +85C Tape &Reel LM431AIBP LM431AIBPX (Note 1) -40C to +85C Note 1: The micro SMD package marking is a 1 digit manufacturing Date Code only micro SMD Top View Marking Example 01005556 www.national.com Z03A 0C to +70C LM431BIM3X LM431AIM3X N1C N1E micro SMD Rails Rails LM431CCM3X/ LM431BCM3X/ LM431ACM3X/ N1B N1D N1F LM431CIM3X N1A NSC Drawing 2% LM431CCZ/ LM431CCZ LM431CIM3 N1A Transport Media 2 250 Units Tape and Reel 3k Units Tape and Reel BPA04AFB LM431 Symbol and Functional Diagrams 01005599 01005555 DC Test Circuits 01005504 FIGURE 1. Test Circuit for VZ = VRE

431CCZ LM431BCZ/ LM431BCZ LM431ACZ/ LM431ACZ 0C to +70C LM431CIZ/ LM431CIZ LM431BIZ/ LM431BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM 0C to +70C LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM -40C to +85C LM431CCM3/ N1B LM431BCM3/ N1D LM431ACM3/ N1F LM431CIM3 N1A LM431BIM3 N1C LM431AIM3 N1E -40C to +85C LM431AIBP LM431AIBPX(Note 1) -40C to +85C - - NSC Drawing Rails Z03A Rails and Tape &Reel M08A Rails and Tape &Reel MF03A 0C to +70C Note 1: The micro SMD package marking is a 1 digit manufacturing Date Code only micro SMD Top View Marking Example DS010055-56 www.national.com Transport Media 2 250 Units Tape and Reel BPA04AFB 3k Units Tape and Reel LM431 Symbol and Functional Diagrams DS010055-99 DS010055-55 DC Test Circuits DS010055-4 DS010055-5 Note: VZ = VREF (1 + R1/R2) + IREF * R1 FIGURE 1. Test Circuit for VZ = VREF FIGURE 2. Test Circuit for VZ > VREF DS010055-6 FIGURE 3. Test Circuit for Off-State Current 3 www.national.com LM431 Absolute

431CCZ LM431BCZ/ LM431BCZ LM431ACZ/ LM431ACZ 0C to +70C LM431CIZ/ LM431CIZ LM431BIZ/ LM431BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM 0C to +70C LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM -40C to +85C LM431CCM3/ N1B LM431BCM3/ N1D LM431ACM3/ N1F LM431CIM3 N1A LM431BIM3 N1C LM431AIM3 N1E -40C to +85C LM431AIBP LM431AIBPX(Note 1) -40C to +85C - - Transport Media NSC Drawing Rails Z03A Rails and Tape &Reel M08A Rails and Tape &Reel MA03B 0C to +70C 250 Units Tape and Reel BPA04AFA 3k Units Tape and Reel Note 1: The micro SMD package marking is a 2 digit manufacturing Date Code only micro SMD Top View Marking Example DS010055-56 The LM431 micro SMD Package will be marked with a two digit date manufacturing code. The underline indicates the bottom of the marking. Pin one will be placed at the bottom left hand corner, and the rest of the pin numbers will follow counter-clockwise. www.national.com 2 LM431 Symbol and Functional Diagrams DS010055-99 D

31BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM LM431CCMX/ 431CCM LM431BCMX/ 431BCM LM431ACMX/ LM431ACM LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM LM431CIMX/ 431CIM LM431BIMX/ 431BIM LM431AIMX/ LM431AIM LM431CCM3/ N1B LM431BCM3/ N1D LM431ACM3/ N1F LM431CCM3X/ N1B LM431BCM3X/ N1D LM431ACM3X/ N1F LM431CIM3 N1A LM431BIM3 N1C LM431AIM3 N1E LM431CIM3X N1A LM431BIM3X N1C LM431AIM3X N1E Transport Media NSC Drawing Rails Z03A Rails 0C to +70C Tape & Reel M08A Rails -40C to +85C Tape &Reel Rails 0C to +70C Tape & Reel MF03A Rails -40C to +85C Tape &Reel Symbol and Functional Diagrams 1005599 1005555 www.national.com 2 LM431 DC Test Circuits 1005504 1005505 Note: VZ = VREF (1 + R1/R2) + IREF* R1 FIGURE 1. Test Circuit for VZ = VREF FIGURE 2. Test Circuit for VZ > VREF 1005506 FIGURE 3. Test Circuit for Off-State Current 3 www.national.com LM431 Operating Conditions Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are

oHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 N1C LM431BIMX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 431 BIM LM431CCM/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 431 CCM LM431CCM3/NOPB ACTIVE SOT-23 DBZ 3 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 N1B LM431CCM3X NRND SOT-23 DBZ 3 3000 TBD Call TI Call TI 0 to 70 N1B LM431CCM3X/NOPB ACTIVE SOT-23 DBZ 3 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 N1B LM431CCZ/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type 0 to 70 LM431 CCZ LM431CIM NRND SOIC D 8 95 TBD Call TI Call TI -40 to 85 431 CIM LM431CIM/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 431 CIM LM431CIM3 NRND SOT-23 DBZ 3 1000 TBD Call TI Call TI -40 to 85 N1A LM431CIM3/NOPB ACTIVE SOT-23 DBZ 3 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 N1A Addendum-Page 2 Sample

03 Various --- 1 R8 13.3k 1% Resistor, 0603 Various --- 1 R9 100k 1% Resistor, 0603 Various --- 1 25 Turn Potentiometer 0 to 50k Digikey 3299Y-503-ND 1 Pushbutton, miniature Digikey P8007S-ND 1 RPOT1 PB1 Adjustable Precision Zener Shunt Regulator National LM431CCM3/N1B 1 TP1,TP2,TP3 U2 Test Points Digikey 5002K-ND 3 J1,2,3,4 Test Points Keystone 1514-2 4 6 AN1021 Board Description - MLFP Silk Screen Top Layer Ground Layer Power Layer Bottom Layer 7 AN1021 Board Description - SOIC Silk Screen Top Layer Ground Layer Power Layer Bottom Layer All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placi

oHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 N1C LM431BIMX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 431 BIM LM431CCM/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 431 CCM LM431CCM3/NOPB ACTIVE SOT-23 DBZ 3 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 N1B LM431CCM3X NRND SOT-23 DBZ 3 3000 TBD Call TI Call TI 0 to 70 N1B LM431CCM3X/NOPB ACTIVE SOT-23 DBZ 3 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 N1B LM431CCZ/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type 0 to 70 LM431 CCZ LM431CIM NRND SOIC D 8 95 TBD Call TI Call TI -40 to 85 431 CIM LM431CIM/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 431 CIM LM431CIM3 NRND SOT-23 DBZ 3 1000 TBD Call TI Call TI -40 to 85 N1A LM431CIM3/NOPB ACTIVE SOT-23 DBZ 3 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 85 N1A Addendum-Page 2 Sample

431CCZ LM431BCZ/ LM431BCZ LM431ACZ/ LM431ACZ 0C to +70C LM431CIZ/ LM431CIZ LM431BIZ/ LM431BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM 0C to +70C LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM -40C to +85C LM431CCM3/ N1B LM431BCM3/ N1D LM431ACM3/ N1F LM431CIM3 N1A LM431BIM3 N1C LM431AIM3 N1E -40C to +85C LM431AIBP LM431AIBPX(Note 1) -40C to +85C - - Transport Media NSC Drawing Rails Z03A Rails and Tape &Reel M08A Rails and Tape &Reel MA03B 0C to +70C 250 Units Tape and Reel BPA04AFA 3k Units Tape and Reel Note 1: The micro SMD package marking is a 2 digit manufacturing Date Code only micro SMD Top View Marking Example DS010055-56 The LM431 micro SMD Package will be marked with a two digit date manufacturing code. The underline indicates the bottom of the marking. Pin one will be placed at the bottom left hand corner, and the rest of the pin numbers will follow counter-clockwise. www.national.com 3-2-2 2 3.2 DEVICE INFORMATION LM431 Symbol and Func

03 Various --- 1 R8 13.3k 1% Resistor, 0603 Various --- 1 R9 100k 1% Resistor, 0603 Various --- 1 25 Turn Potentiometer 0 to 50k Digikey 3299Y-503-ND 1 Pushbutton, miniature Digikey P8007S-ND 1 RPOT1 PB1 Adjustable Precision Zener Shunt Regulator National LM431CCM3/N1B 1 TP1,TP2,TP3 U2 Test Points Digikey 5002K-ND 3 J1,2,3,4 Test Points Keystone 1514-2 4 6 AN1021 Board Description - MLFP Silk Screen Top Layer Ground Layer Power Layer Bottom Layer 7 AN1021 Board Description - SOIC Silk Screen Top Layer Ground Layer Power Layer Bottom Layer All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placi

431CCZ LM431BCZ/ LM431BCZ LM431ACZ/ LM431ACZ 0C to +70C LM431CIZ/ LM431CIZ LM431BIZ/ LM431BIZ LM431AIZ/ LM431AIZ -40C to +85C LM431CCM/ 431CCM LM431BCM/ 431BCM LM431ACM/ LM431ACM 0C to +70C LM431CIM/ 431CIM LM431BIM/ 431BIM LM431AIM/ LM431AIM -40C to +85C LM431CCM3/ N1B LM431BCM3/ N1D LM431ACM3/ N1F LM431CIM3 N1A LM431BIM3 N1C LM431AIM3 N1E -40C to +85C LM431AIBP LM431AIBPX(Note 1) -40C to +85C - - NSC Drawing Rails Z03A Rails and Tape &Reel M08A Rails and Tape &Reel MF03A 0C to +70C Note 1: The micro SMD package marking is a 1 digit manufacturing Date Code only micro SMD Top View Marking Example DS010055-56 www.national.com Transport Media 2 250 Units Tape and Reel BPA04AFA 3k Units Tape and Reel LM431 Symbol and Functional Diagrams DS010055-99 DS010055-55 DC Test Circuits DS010055-4 DS010055-5 Note: VZ = VREF (1 + R1/R2) + IREF * R1 FIGURE 1. Test Circuit for VZ = VREF FIGURE 2. Test Circuit for VZ > VREF DS010055-6 FIGURE 3. Test Circuit for Off-State Current 3 www.national.com LM431 Absolute

LM4667 LM4860 LM4861 LM4871 LM4890 LM4891 LM4894 LM4895 LM556 LM556 LM556 LM556 LM556 LM723 LM723 LM723 LM723 LM723 LM74 LM74 LM74 LM74 LM741 LM741 LM741 LM741 LM741 LM747 LM747 LM431ACMX LM431ACZ LM431AIM LM431AIM3 LM431AIM3X LM431AIMX LM431AIZ LM431CCM LM431CCM3 LM431CCM3X LM431CCMX LM431CCZ LM431CIM LM431CIM3 LM431CIM3X LM431CIMX LM431CIZ LM4665ITL LM4667ITL LM4860M LM4861M LM4871LD LM4890LD LM4891LD LM4894LD LM4895LD LM556CJ LM556CM LM556CMX LM556CN LM556J LM723CJ LM723CM LM723CMX LM723CN LM723J LM74CIM-3 LM74CIM-5 LM74CIMX-3 LM74CIMX-5 LM741CJ LM741CM LM741CMX LM741CN LM741J LM747CJ LM747CN Discontinued 04/04/1995 Discontinued 04/04/1995 Discontinued 03/10/1998 0 to 70 0 to 70 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -20 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 -55

92 Pin to Pin National Semiconductor LM431BCM3 SPX2431M Precision Adjustable Shunt Regulator 3 SOT-23 Functional Equivalent National Semiconductor LM431BCZ SPX2431N Precision Adjustable Shunt Regulator 3 SOT-23 Functional Equivalent National Semiconductor LM431CCM3 SPX2431AM Precision Adjustable Shunt Regulator 3 SOT-23 Functional Equivalent National Semiconductor LM431CCZ SPX2431AN Precision Adjustable Shunt Regulator 3 SOT-23 Functional Equivalent National Semiconductor LMS1585ACS-1.5 SPX1585T-1.5 5A NPN LDO Voltage Regulator 3 TO-263 Functional Equivalent National Semiconductor LMS1585ACS-3.3 SPX1585T-3.3 5A NPN LDO Voltage Regulator 3 TO-263 Pin to Pin National Semiconductor LMS1585ACS-3.3 SPX1585T-3.3 5A NPN LDO Voltage Regulator 3 TO-263 Pin to Pin National Semiconductor LMS1585ACS-ADJ SPX1585T 5A NPN LDO Voltage Regulator 5 TO-263 Pin to Pin National Semiconductor LMS1585ACT-1.5 SPX1585U-1.5 5A NPN LDO Voltage Regulator 3 TO-220 Functional Equivalent National Semiconductor LMS1585ACT-3.3 S