TL431_432 DIODES | Alldatasheet

Document overview

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  • PDF pages: 14

Technical content

Features

  • Temperature range -40 to 125ºC
  • Reference Voltage Tolerance at 25°C
  • Low Output Noise
  • 0.2 Ω Typical Output Impedance
  • Sink Current Capability: 1mA to 100mA
  • Adjustable Output Voltage: V REF to 36V
  • SOT23 and SOT25: Available in “Green” Molding Compound (No Br, Sb) and Lead Free Finish/ RoHS Compliant (Note 1)

Applications

  • Opto-Coupler Linearisers
  • Shunt Regulators
  • Improved Zener
  • Variable Reference Pin Assignments TL431 ANODE 1

2 CATHODE

(Top View) SOT23 SOT25 (Top View) TL432 (Top View) ANODE 1 CATHODE3 REF SOT23 Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html.

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 2 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Absolute Maximum Ratings (Note 2) Symbol Parameter Rating Unit VKA Cathode Voltage 40 V IKA Continuous Cathode Current 150 mA IREF Reference Input Current -0.050 to +10 mA TJ Operating Junction Temperature +150 °C TST Storage Temperature -55 to +150 °C PD Power Dissipation (Notes 3, 4) SOT23 330 mW SOT25 500 mW Notes: 2. Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin. 3. TJ, max =150°C. 4. Ratings apply to ambient temperature at 25°C. Recommended Operating Conditions Symbol Parameter Min Max Unit VKA Cathode Voltage VREF 36 V IKA Cathode Current 1 100 mA TA Operating Ambient Te mperature -40 125 °C

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 3 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Electrical Characteristics (TA = +25°C, unless otherwise noted) Symbol Parameter Test Conditions Min Typ. Max Unit VREF Reference voltage VKA = VREF, IKA = 10mA TL431A 2.470 2.495 2.520 V TL431B 2.482 2.495 2.507 V VDEV Deviation of reference voltage over full temperature range (Note 5) VKA = VREF, IKA = 10mA TA = 0 to 70 oC 6 16 mV TA = -40 to 85 oC 14 34 mV TA = -40 to 125 oC 14 34 mV ΔVREF ΔVKA Ratio of the change in reference voltage to the change in cathode voltage I KA = 10mA VKA = 10V to VREF -1.4 -2.7 mV/V VKA = 36V to 10V -1 -2 mV/V IREF Reference input current IKA = 10mA, R1 = 10KΩ, R2 = ∞ 1 4 μA ΔIREF IREF deviation over full temperature range (Note 5) IKA = 10mA, R1 = 10KΩ, R2 = ∞ TA = 0 to 70 oC 0.8 1.2 μA TA = -40 to 85 oC 0.8 2.5 μA TA = -40 to 125 oC 0.8 2.5 μA IKA(MIN) Minimum cathode current for regulation VKA = VREF 0.4 0.7 mA IKA(OFF) Off-state current VKA = 36V, VREF = 0V 0.05 0.5 μA |ZKA| Dynamic output impedance (Note 6) V KA = VREF, f = 0Hz 0.2 0.5 Ω θJA Thermal Resistance Junction to Ambient SOT23 380 oC/W SOT25 250 oC/W Notes: 5. Deviation of VDEV, and ΔIREF are defined as the maximum variation of the values over the full temperature range. The average temperature coefficient of the reference input voltage αVREF is defined as: Where: T2 – T1 = full temperature change. αV REF can be positive or negative depending on whether the slope is positive or negative. Notes: 6. The dynamic output impedance, RZ, is defined as: When the device is programmed with two external resistors R1 and R2, the dynamic output impedance of the overall circuit, is defined as: = T2 – T1 αVREF VDEV VREF @ 25ºC X 106 ppm/ºC= T2 – T1 αVREF VDEV VREF @ 25ºC X 106 ppm/ºC Vmax Vmin T1 T2 VDEV = Vmax - Vmin Temperature Vmax Vmin T1 T2 VDEV = Vmax - Vmin Temperature=ZKA ΔVKA ΔIKA =ZKA ΔVKA ΔIKA =Z’ ΔV ΔI ZKA 1 + R1 R2≈=Z’ ΔV ΔI=Z’ ΔV ΔI ZKA 1 + R1 R2ZKA 1 + R1 R2≈

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 5 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Typical Performance Characteristics 2400 2420 2440 2460 2480 2500 2520 2540 2560 2580 2600 -55 -35 -15 5 25 45 65 85 105 125 T Free Air T emperature ( C) Reference Voltage vs. Free Air Temperature A ° V Reference Voltage (mV)REF I = 1 0 m A V = V T = 2 5 C KA KA RE F A ° 0.05 0.1 0.15 0.2 -55 -35 -15 5 25 45 65 85 105 125 T Free Air T emperature ( C) Reference Current vs. Free Air Temperature A ° I Reference Current ( A)REF μ R1 = 10K R2 = I = 1 0 m A Ω KA -100 -50 100 150 -2 -1 0 12 3 V Cathode Voltage (V) Cathode Current vs. Cathode Voltage KA I Cathode Current (mA)KA V = V T = 2 5 C KA RE F A ° -100 100 200 -2 -1 0 12 3 V Cathode Voltage Cathode Current vs. Cathode Voltage KA IKMIN I Cathode Curr ent ( A)KA μ V = V T = 2 5 C KA RE F A °

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 6 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Typical Performance Characteristics (Continued) 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 -75 -50 -25 0 25 50 75 100 125 T Free Air T emperature ( C) Off-State Cathode Current vs. Free Air Temperature A ° I Off-State Cathode Current ( A)KOFF μ V = 3 6 V V= 0 KA REF -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -50 -25 0 25 50 75 100 125 V = 3V t o 36VKA T Free Air Temperature (C) Ratio of Delta Reference Voltage to Delta Cathode Voltage vs. Free Air T emperature A dV /dV (mV/V)REF KA 200 220 240 260 280 300 320 340 360 380 400 10 100 1K 10K 100K f- Frequency (Hz) Equivalent Input Noise Voltage vs. Frequency V = Equivalent Input Noise Voltage nV/ HzN √ I = 1 0 m A V = V T = 2 5 ° C KA KA RE F A

Figure 4. Test circuit for noise input voltage

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 8 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Typical Performance Characteristics (Continued) 100 1K 10K 100K 1M 10M f Frequency (Hz) Small-Signal Voltage Amplification vs. Frequency A Small-Signal Voltage Amplification (dB)V I = 10mA T = 2 5 C KA A ° Test circuit for voltage amplification 0.0 0.1 1.0 10.0 100.0 1K 10K 100K 1M 10M Z Reference Impedance ( )KA Ω I = 1 0 m A T = 2 5 C KA A ° f Frequency (Hz) Reference Impedance vs. Frequency Test circuit for reference impedance

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 9 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Typical Performance Characteristics (Continued) 01 2 3456789 1 0 t Time ( s) Pulse Response μ Input and Output Voltage (V) Ou tp ut Input T = 2 5 CA ° Test Circuit for Pulse Response 100 0.00001 0.0001 0.001 0.01 0.1 1 D C -Load Capacitance - uF Stability Boundary Conditions L I - Cathode Current - mAKA A V = V B V = 5 V C V = 10V D V = 15V KA REF KA KA KA StableStable Stable D C CB B A T = 2 5 CA ° Test Circuit for Curve A Test circuit for curves B, C, D Test Circuit for Curves B, C, D The device is stable under all conditions with a load capacitance not exceeding 50pF. The device is stable under all conditions with a load capacitance between 5nF and 20nF. The device is stable under all conditions with a load capacitance exceeding 300nF. With a cathode current not exceeding 5mA, the device is stable with any load capacitance.

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 10 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Applications Information Series RegulatorOutput Control of a Three Terminal Fixed Regulator Single Supply Comparator with Temperature Compensated Threshold Over Voltage / Under Voltage Protection Circuit Higher Current Shunt RegulatorShunt Regulator

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 11 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT

Ordering Information

Pinout variation Tolerance Package Packing 1: Standard pinout 2: Reversed pinout in SOT23 A: ±1.0% B: ±0.5% SA: SOT23 W5: SOT25 7: Tape & Reel TL43 X X XX -7 Pinout variation Tolerance Package Packing 1: Standard pinout 2: Reversed pinout in SOT23 A: ±1.0% B: ±0.5% SA: SOT23 W5: SOT25 7: Tape & Reel TL43 X X XX -7 Device (Note 7) Package Code Packaging (Note 5) 7” Tape and Reel Ammo Box Quantity Part Number Suffix Quantity Part Number Suffix TL431A(B)SA-7 SA SOT23 3000/Tape & Reel -7 NA NA TL431A(B)W5-7 W5 SOT25 3000/Tape & Reel -7 NA NA TL432A(B)SA-7 SA SOT23 3000/Tape & Reel -7 NA NA Notes: 7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 8. Suffix “B” denotes TL431B device.

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 12 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Marking Information (1) SOT23 1 2 XX Y W X ( Top View ) XX : Identification code W : Week : A~Z : 1~26 week; X : A~Z : Green Y : Year 0~9 a~z : 27~52 week; z represents 52 and 53 week Device Package Identification Code TL431ASA SOT23 AA TL431BSA SOT23 AB TL432ASA SOT23 BA TL432BSA SOT23 BB (2) SOT25 1 2 3 XX Y W X ( Top View ) XX : Identification code W : Week : A~Z : 1~26 week; X : A~Z : Green Y : Year 0~9 a~z : 27~52 week; z represents 52 and 53 week Device Package Identification Code TL431AW5 SOT25 AA TL431BW5 SOT25 AB

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 13 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT Package Outline Dimensions (All Dimensions in mm) (1) Package type: SOT25 (2) Package Types: SOT23

ADJUSTABLE PRECISION SHUNT REGULATOR TL431/432 Document number: DS35050 Rev. 2 - 2 14 of 14 www.diodes.com September 2010 © Diodes Incorporated NEW PRODUCT IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries rese rve the right to make modifications, enhanc ements, improvements, corrections or ot her changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liabi lity arising out of the application or use of this document or an y product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of othe rs. Any Customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability what soever in respect of any prod ucts purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives har mless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifica lly not authorized for use as critical co mponents in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsi ble for all legal, regulatory and safety-related requirements concerning their products and any use of Diode s Incorporated products in such safety-cri tical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its repr esentatives against any damages ar ising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2010, Diodes Incorporated www.diodes.com