Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor product management systems do not have the ability to manage part nomenclature that utilizes an underscore (_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please email any questions regarding the system integration to Fairchild_questions@onsemi.com. ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

K A 4 3 July 2013 1 / K A 4 3 1 KA431 / KA431A / KA431L A / K Programmable Shunt Regulator A 4 3 1 L — Features Description P r • Programmable Output Voltage to 36 V The KA431 / KA431A / KA431L are three-terminal o g • Low Dynamic Output Impedance: 0.2 Ω (Typical) adjustable regulators with a guaranteed thermal stability r a • Sink Current Capability: 1.0 to 100 mA over the operating temperature range. The output volt- m • Equivalent Full-Range Temperature Coefficient age can be set to any value between VREF (approxi- m mately 2.5 V) and 36 V with two external resistors. a of 50 ppm/°C (Typical) These devices have a typical dynamic output impedance b l • Temperature Compensated for Operation of 0.2 Ω. Active output circuitry provides a sharp turn-on e S Over Full Rated Operating Temperature Range characteristic, making these devices excellent replace- h • Low Output Noise Voltage ments for Zener diodes in many applications. u n • Fast Turn-on Response t TO-92 R e g u l a t o 1 r 1. Ref 2. Anode 3. Cathode 8-SOIC 1 1.Cathode 2.3.6.7.Anode 4.5.NC 8.Ref Ordering Information Operating Output Voltage Part Number Temperature Top Mark Package Packing Method Tolerance Range KA431DTF 2% 431 8-SOIC Tape and Reel KA431ADTF 431A 8-SOIC Tape and Reel KA431AZBU -25 ~ +85°C 1% KA431AZ TO-92 Bulk KA431AZTA KA431AZ TO-92 Ammo KA431LZTA 0.5% KA431LZ TO-92 Ammo © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 1

K A Block Diagram 4 3 1 / K + CATHODE A REFERENCE 4 3 - 1 A / 2.5 Ref K A 4 3 1 L ANODE — CATHODE (K) P r o g REFERENCE (R) r a m m ANODE(A) a b l Figure 1. Block Diagram e S h Absolute Maximum Ratings u n Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera- t R ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi- e tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The g u absolute maximum ratings are stress ratings only. Values are at T = 25°C unless otherwise noted. A l a Symbol Parameter Value Unit to r 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 mA REF Power Dissipation P 770 mW D TO-92, 8-SOIC Packages RθjA TTOhe-r9m2,a 8l -RSeOsiIsCta Pnaccek, aJguensction to Ambient 160 °C/W T Operating Temperature Range -25 to +85 °C OPR T Junction Temperature 150 °C J T Storage Temperature Range -65 to +150 °C STG Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter Min. Max. Unit V Cathode Voltage V 36 V KA REF I Cathode Current 1 100 mA KA © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 2

K A Electrical Characteristics 4 3 1 Values are at TA = 25°C unless otherwise noted. / KA431 KA431A KA431L K Symbol Parameter Conditions Unit A Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. 4 3 1 Reference V = V , V KA REF 2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508 V A REF Input Voltage IKA = 10 mA / K Deviation of A ΔV / Reference VKA = VREF, 4 REF Input Voltage I =10 mA 4.5 17.0 4.5 17.0 4.5 17.0 mV 3 ΔT KA 1 Over- T ≤ T ≤ T (1) L MIN A MAX Temperature — Ratio of ΔV = P Change in 10VK-AVREF -1.0 - 2.7 -1.0 - 2.7 -1.0 -2.7 ro Reference g r ΔV / Input Voltage I = a ΔVRKEAF to the 1K0A mA ΔVKA = -0.5 -2.0 -0.5 -2.0 -0.5 -2.0 mV / V mm Change in 36 V-10 V a Cathode b Voltage le S I Reference IKA = 10 mA, 1.5 4.0 1.5 4.0 1.5 4.0 μA h REF Input Current R1 =10 kΩ, R2 = ∞ u n Deviation of t R Reference I = 10 mA, e Input Current KA g ΔIREF/ ΔT Over Full R1 = 10 kΩ, R2 = ∞ 0.4 1.2 0.4 1.2 0.4 1.2 μA u Temperature TA = Full Range lat o Range r Minimum Cathode I V = V 0.45 1.00 0.45 1.00 0.45 1.00 mA KA(MIN) Current for KA REF Regulation Off - Stage I Cathode VKA = 36 V, 0.05 1.00 0.05 1.00 0.05 1.00 μA KA(OFF) V = 0 Current REF V = V , Dynamic KA REF Z I =1 to 100 mA 0.15 0.50 0.15 0.50 0.15 0.50 Ω KA Impedance KA f ≥ 1.0 kHz Note: 1. T = -25°C, T = +85°C. MIN MAX © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 3

K A Test Circuits 4 3 1 / K A 4 3 1 A / K A 4 3 1 L — Figure 2. Test Circuit for VKA= VREF Figure 3. Test Circuit for VKA ≥ VREF P r o g r a m m a b l e S h u n t R e g Figure 4. Test Circuit for I u KA(OFF) l a t o r © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 4

K A Typical Performance Characteristics 4 3 1 / K A 4 3 1 A / K A 4 3 1 L — P r o g r a Figure 5. Cathode Current vs. Cathode Voltage Figure 6. Cathode Current vs. Cathode Voltage m m a b l e S h u n t R e g u l a t o r Figure 7. Change in Reference Input Voltage vs. Figure 8. Dynamic Impedance Frequency Cathode Voltage Figure 9. Small Signal Voltage Amplification vs. Figure 10. Pulse Response Frequency © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 5

K A Typical Performance Characteristics (Continued) 4 3 1 / K A 140 4 3 A 120 A VKA = Vref B 1A B V = 5.0 V @ I = 10 RENT(mA)18000 CDTA VV =KKK AAA2 5==o C1105 VV @@ IIKKK == 1100mmmAAA C / KA R 4 U DE C 60 31 O L H AT 40 — C I, K 20 D P r o 0 100p 1n 10n 100n 1? 10? g CL, LOAD CAPACITANCE ra m m Figure11. Stability Boundary Conditions a b l e S h u n t R e g u l a t o r © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 6

K A Typical Application 4 3 1 / K VO = 1+RR-----12--Vref VO = Vref1+RR-----12-- VO = 1+RR-----12--Vref A43 1 A / K A 4 3 1 L — P r Figure 12. Shunt Regulator Figure 13. Output Control for Three- Figure 14. High-Current Shunt o g Terminal Fixed Regulator Regulator r a m m a b l e S h u n t R e g u l a t o r Figure 15. Current Limit or Current Source Figure 16. Constant-Current Sink © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 7

K A Physical Dimensions 4 3 1 TO-92 Bulk Type / K A 4 3 1 A / K A 4 3 1 L — P r o g r a m m a b l e S h u n t R e g u l a t o r DD) DRAWING FILENAME: MKT-ZA03DREV3. Figure 17. 3-Lead, TO-92, Molded, Standard Straight Lead Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/dwg/ZA/ZA03D.pdf. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/packing_dwg/PKG-ZA03D_BK.pdf. © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 8

K A Physical Dimensions (Continued) 4 3 1 TO-92 Ammo Type / K A 4 3 1 A / K A 4 3 1 L — P r o g r a m m a b l e S h u n t R e g u l a t o r DD) DRAWING FILENAME: MKT-ZA03FREV2. Figure 18. 3-Lead, TO-92, Molded, 0.200 in Line Spacing Lead Form Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/dwg/ZA/ZA03F.pdf. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/packing_dwg/PKG-ZA03F_BK.pdf. © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 9

K A Physical Dimensions (Continued) 4 3 1 / K 8-SOIC A 4 3 1 A / K 5.00 4.80 A 0.65 A4 3 3.81 1 L 8 5 — B P 6.20 1.75 ro 5.80 4.00 5.60 g 3.80 ra m m a 1 4 b PIN ONE l INDICATOR 1.27 e 1.27 S (0.33) h 0.25 C B A u LAND PATTERN RECOMMENDATION n 0.25 SEE DETAIL A t R 0.10 e 0.25 g u 1.75 MAX C 0.19 l a t 0.51 0.10 o r 0.33 OPTION A - BEVEL EDGE 0.50 x 45° 0.25 R0.10 GAGE PLANE R0.10 OPTION B - NO BEVEL EDGE 0.36 8° NOTES: UNLESS OTHERWISE SPECIFIED 0° A) THIS PACKAGE CONFORMS TO JEDEC MS-012, VARIATION AA. 0.90 SEATING PLANE B) ALL DIMENSIONS ARE IN MILLIMETERS. 0.40 C) DIMENSIONS DO NOT INCLUDE MOLD (1.04) FLASH OR BURRS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M. DETAIL A E) DRAWING FILENAME: M08Arev14 SCALE: 2:1 F) FAIRCHILD SEMICONDUCTOR. Figure 19. 8-Lead, SOIC, JEDEC MS 0-12, 0.150 inch Narrow Body Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/dwg/M0/M08A.pdf. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/packing_dwg/PKG-M08A_PSTS.pdf. © 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com KA431 / KA431A / KA431L Rev. 1.2.1 10

TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks. 2Cool(cid:165) FPS(cid:165) Sync-Lock™ AccuPower(cid:165) F-PFS(cid:165) ® AX-CAP®* FRFET® PowerTrench® ®* BitSiC(cid:165) Global Power ResourceSM PowerXS™ TinyBoost(cid:165) Build it Now(cid:165) GreenBridge(cid:165) Programmable Active Droop(cid:165) TinyBuck(cid:165) CorePLUS(cid:165) Green FPS(cid:165) QFET® TinyCalc(cid:165) CorePOWER(cid:165) Green FPS(cid:165) e-Series(cid:165) QS(cid:165) TinyLogic® CROSSVOLT(cid:165) Gmax(cid:165) Quiet Series(cid:165) TINYOPTO(cid:165) CTL(cid:165) GTO(cid:165) RapidConfigure(cid:165) TinyPower(cid:165) Current Transfer Logic(cid:165) IntelliMAX(cid:165) (cid:165) TinyPWM(cid:165) DEUXPEED® ISOPLANAR(cid:165) TinyWire(cid:165) Dual Cool™ Making Small Speakers Sound Louder Saving our world, 1mW/W/kW at a time™ TranSiC(cid:165) EcoSPARK® and Better™ SignalWise(cid:165) TriFault Detect(cid:165) EfficientMax(cid:165) MegaBuck(cid:165) SmartMax(cid:165) TRUECURRENT®* ESBC(cid:165) MICROCOUPLER(cid:165) SMART START(cid:165) (cid:80)SerDes(cid:165) ® MicroFET(cid:165) Solutions for Your Success(cid:165) MicroPak(cid:165) SPM® FFaaiirrcchhiilldd ®Semiconductor® MicroPak2(cid:165) SSTupEeArLFTEHT(cid:165)® UHC® FFFFFAEAAasCTCStBTvTTC®e® Qnocurehie(cid:165)(cid:165)t Series(cid:165) OMMmOOPpPWiollttTTeoiSorOOHDnaPLiMvrTOieLv(cid:165)arAeG(cid:165)x(cid:165)N(cid:165)ICA®R® SSSSSuuuuynppppecreeerFrrSMSSEOOOTOT(cid:165)TTS(cid:165)(cid:165)(cid:165)®-3--68 UUVVVXCioSlnstrli™XutFaaa(cid:165)E g FlMTeR(cid:165)PaFlxuE(cid:165)sT(cid:165)(cid:165) * Trademarks of System General Corporation, used under license by Fairchild Semiconductor. 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Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: O N Semiconductor: KA431ADTF KA431AZBU KA431AZTA