LM431ACMX

LM431A / LM431B / LM431C Programmable Shunt Regulator Features Description • • • • The LM431A / LM431B / LM431C are three-terminal output adjustable regulators with thermal stability over the full operating temperature range. The output voltage can be set to any value between VREF (approximately 2.5 V) and 36 V with two external resistors. These devices have a typical dynamic output impedance of 0.2 Ω. Active output circuit provides a sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications. Programmable Output Voltage to 36 V Low Dynamic Output Impedance: 0.2 Ω (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 TO-92 1 1. Ref 2. Anode 3. Cathode 8-SOIC 1 1.Cathode 2.3.6.7.Anode 4.5.NC 8.Ref Ordering Information Part Number Operating Output Voltage Temperature Tolerance Range LM431CCZ Top Mark 0.5% LM431CCMX LM431BCZX LM431BCZXA LM431BCMX -25 ~ +85°C 1% LM431ACZ LM431ACZX 2% LM431BIZX LM431AIZ -40 ~ +85°C LM431AIMX © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 Packing Method LM431CCZ TO-92 Bulk LM431CCM 8-SOIC Tape and Reel LM431BCZ TO-92 Tape and Reel LM431BCZ TO-92 Ammo LM431BCM 8-SOIC Tape and Reel LM431ACZ TO-92 Bulk LM431ACZ TO-92 Tape and Reel LM431ACM 8-SOIC Tape and Reel 0.5% LM431CIM 8-SOIC Tape and Reel 1% LM431BIZ TO-92 Tape and Reel LM431AIZ TO-92 Bulk LM431AIM 8-SOIC Tape and Reel LM431ACMX LM431CIMX Package 2% www.fairchildsemi.com 1 LM431A / LM431B / LM431C — Programmable Shunt Regulator June 2013 REFERENCE CATHODE + 2.5 Ref ANODE CATHODE (K) REFERENCE (R) ANODE (A) Figure 1. Block Diagram Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted. Symbol Parameter Value Unit VKA Cathode Voltage 37 V IKA Cathode Current Range (Continuous) -100 ~ +150 mA IREF Reference Input Current Range -0.05 ~ +10 mA 770 mW 160 °C/W Operating Temperature Range LM431xC -25 ~ +85 °C Operating Temperature Range LM431xI -40 ~ +85 °C 150 °C -65 ~ +150 °C PD RθjA TOPR TJ TSTG Power Dissipation TO-92, 8-SOIC Packages Thermal Resistance, Junction to Ambient TO-92, 8-SOIC Packages Junction Temperature Storage Temperature Range 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 VKA Cathode Voltage VRef 36 V IKA Cathode Current 1.0 100 mA © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 www.fairchildsemi.com 2 LM431A / LM431B / LM431C — Programmable Shunt Regulator Block Diagram Values are at TA = 25°C unless otherwise noted. Symbol Parameter VREF Conditions Reference VKA = VREF, Input Voltage IKA = 10 mA ΔVREF/ ΔT Deviation of Reference Input Voltage OverTemperature ΔVREF/ ΔVKA Ratio of Change in Reference Input Voltage IKA = 10 mA to the Change in Cathode Voltage LM431A LM431B LM431C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. 2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508 Unit V VKA = VREF, IKA =10 mA TMIN ≤ TA ≤ TMAX(1) 4.5 17.0 4.5 17.0 4.5 17.0 ΔVKA = 10V-VREF -1.0 -2.7 -1.0 -2.7 -1.0 -2.7 ΔVKA = 36V-10V -0.5 -2.0 -0.5 -2.0 -0.5 -2.0 Reference IKA = 10 mA, Input Current R1 =10 kΩ, R2 = ∞ 1.5 4.0 1.5 4.0 1.5 4.0 μA Deviation of Reference Input Current Over Full Temperature Range IKA = 10 mA, R1 = 10 kΩ, R2 = ∞ TA = Full Range 0.4 1.2 0.4 1.2 0.4 1.2 μA IKA(MIN) Minimum Cathode Cur-rent for Regulation VKA = VREF 0.45 1.00 0.45 1.00 0.45 1.00 mA IKA(OFF) Off - Stage Cathode Current VKA = 36 V, VREF = 0 0.05 1.00 0.05 1.00 0.05 1.00 μA VKA = VREF, IKA =1 to 100 mA f ≥ 1.0 kHz 0.15 0.50 0.15 0.50 0.15 0.50 Ω IREF ΔIREF / ΔT ZKA Dynamic Impedance mV mV / V Note: 1. LM431xC: TMIN = -25°C, TMAX = +85°C. LM431xI: TMIN = -40°C, TMAX = +85°C. © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 www.fairchildsemi.com 3 LM431A / LM431B / LM431C — Programmable Shunt Regulator Electrical Characteristics LM431 LM431 Figure 3. Test Circuit for VKA ≥ VREF Figure 2. Test Circuit for VKA= VREF LM431 Figure 4. Test Circuit for IKA(OFF) © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 www.fairchildsemi.com 4 LM431A / LM431B / LM431C — Programmable Shunt Regulator Test Circuits Figure 5. Cathode Current vs. Cathode Voltage Figure 6. Cathode Current vs. Cathode Voltage Figure 7. Change In Reference Input Voltage vs. Cathode Voltage Figure 8. Dynamic Impedance Frequency Figure 9. Small Signal Voltage Amplification vs. Frequency Figure 10. Pulse Response © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 www.fairchildsemi.com 5 LM431A / LM431B / LM431C — Programmable Shunt Regulator Typical Performance Characteristics LM431A / LM431B / LM431C — Programmable Shunt Regulator Typical Performance Characteristics (Continued) 140 A IK, CATHODE CURRENT(mA) 120 100 A VKA = Vref B VKA = 5.0 V @ IK = 10mA C VKA = 10 V @ IK = 10mA D VKA = 15 V @ IK = 10mA B C o TA = 25 C 80 60 40 D 20 0 100p 1n 10n 100n 1? 10? CL, LOAD CAPACITANCE Figure11. Stability Boundary Conditions © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 www.fairchildsemi.com 6 R   1 V O = V ref  1 + ------- R 2  R   1 V O =  1 + ------- V R  ref  2 LM431 R   1 V O =  1 + ------- V R  ref  2 LM431 LM431 Figure 12. Shunt Regulator Figure 13. Output Control for ThreeTerminal Fixed Regulator LM431 LM431 Figure 15. Current Limit or Current Source © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 Figure 14. High-Current Shunt Regulator Figure 16. Constant-Current Sink www.fairchildsemi.com 7 LM431A / LM431B / LM431C — Programmable Shunt Regulator Typical Application LM431A / LM431B / LM431C — Programmable Shunt Regulator Physical Dimensions TO-92 Bulk Type D D) 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/packaging/. © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 www.fairchildsemi.com 8 LM431A / LM431B / LM431C — Programmable Shunt Regulator Physical Dimensions (Continued) TO-92 Ammo Type, Tape and Reel Type D D) 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/packaging/. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/products/discrete/pdf/to92_tr.pdf. © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 www.fairchildsemi.com 9 LM431A / LM431B / LM431C — Programmable Shunt Regulator Physical Dimensions (Continued) 8-SOIC 5.00 4.80 A 0.65 3.81 8 5 B 1.75 6.20 5.80 4.00 3.80 1 PIN ONE INDICATOR 5.60 4 1.27 (0.33) 1.27 0.25 C B A LAND PATTERN RECOMMENDATION SEE DETAIL A 0.25 0.10 0.25 0.19 C 1.75 MAX 0.10 0.51 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 NOTES: UNLESS OTHERWISE SPECIFIED 8° 0° 0.90 0.40 A) THIS PACKAGE CONFORMS TO JEDEC MS-012, VARIATION AA. B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M. E) DRAWING FILENAME: M08Arev14 F) FAIRCHILD SEMICONDUCTOR. SEATING PLANE (1.04) DETAIL A SCALE: 2:1 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/packaging/. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/products/discrete/pdf/soic8_tr.pdf. © 2003 Fairchild Semiconductor Corporation LM431A / LM431B / LM431C Rev. 1.2.0 www.fairchildsemi.com 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. 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Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor. The datasheet is for reference information only. Rev. I64 © Fairchild Semiconductor Corporation www.fairchildsemi.com