TL431BW5-7

TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Description The TL431 and TL432 are three terminal adjustable shunt regulators offering excellent temperature stability and output current handling capability up to 100mA. The output voltage may be set to any chosen voltage between 2.5 and 36 volts by selection of two external divider resistors. The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. Diodes’ TL431 has the same electrical specifications as the industry standard ‘431 and is available in 2 grades with initial tolerances of 1% and 0.5% for the A and B grades respectively. Pin Assignments TL431 (Top View) 3 ANODE 1 2 CATHODE REF N EW PRODUCT SOT23   NC NC 1 2 3 (Top View ) 5 ANODE Features • • Temperature range -40 to 125ºC Reference Voltage Tolerance at 25°C • TL431A: 2.495V ± 1.0%. • • • • • • TL431B: 2.495V ± 0.5% Low Output Noise 0.2Ω Typical Output Impedance Sink Current Capability: 1mA to 100mA Adjustable Output Voltage: VREF to 36V SOT23 and SOT25: Available in “Green” Molding Compound (No Br, Sb) and Lead Free Finish/ RoHS Compliant (Note 1) CATHODE 4 REF SOT25 TL432 (Top View ) 3 ANODE 1 2 REF CATHODE Applications SOT23 • • • • Opto-Coupler Linearisers Shunt Regulators Improved Zener Variable Reference 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. TL431/432 Document number: DS35050 Rev. 2 - 2 1 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Absolute Maximum Ratings (Note 2) Symbol VKA IKA IREF TJ TST Cathode Voltage Continuous Cathode Current Reference Input Current Operating Junction Temperature Storage Temperature Power Dissipation (Notes 3, 4) SOT23 SOT25 Parameter Rating 40 150 -0.050 to +10 +150 -55 to +150 330 500 Unit V mA mA ° ° C C N EW PRODUCT PD Notes: mW mW 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 VKA IKA TA Cathode Voltage Cathode Current Operating Ambient Temperature Parameter Min VREF 1 -40 Max 36 100 125 Unit V mA °C TL431/432 Document number: DS35050 Rev. 2 - 2 2 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Electrical Characteristics (TA = +25°C, unless otherwise noted) Symbol VREF Parameter Reference voltage Test Conditions VKA = VREF, IKA = 10mA VKA = VREF, IKA = 10mA TL431A TL431B TA = 0 to 70 C VDEV Deviation of reference voltage over full temperature range (Note 5) Ratio of the change in reference voltage to the change in cathode voltage Reference input current IREF deviation over full temperature range (Note 5) Minimum cathode current for regulation Off-state current TA = -40 to 85 C TA = -40 to 125 C ΔVREF ΔVKA IREF ΔIREF VKA = 10V to VREF IKA = 10mA VKA = 36V to 10V o o o Min 2.470 2.482 Typ. 2.495 2.495 6 14 14 -1.4 -1 1 0.8 0.8 0.8 0.4 0.05 0.2 380 250 Max 2.520 2.507 16 34 34 -2.7 -2 4 1.2 2.5 2.5 0.7 0.5 0.5 Unit V V mV mV mV mV/V mV/V μA μA μA μA mA μA Ω o o N EW PRODUCT IKA = 10mA, R1 = 10KΩ, R2 = ∞ TA = 0 to 70 C IKA = 10mA, R1 = TA = -40 to 85 oC 10KΩ, R2 = ∞ TA = -40 to 125 oC VKA = VREF VKA = 36V, VREF = 0V o IKA(MIN) IKA(OFF) |ZKA| θJA Notes: Dynamic output impedance (Note 6) VKA = VREF, f = 0Hz Thermal Resistance Junction to Ambient SOT23 SOT25 C/W C/W 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: Vmax VDEV αVREF = VREF @ 25ºC T2 – T1 X 106 ppm/ºC Vmin Where: T2 – T1 = full temperature change. αVREF can be positive or negative depending on whether the slope is positive or negative. Notes: 6. The dynamic output impedance, RZ, is defined as: VDEV = Vmax - Vmin ZKA = ΔVKA ΔIKA T1 Temperature T2 When the device is programmed with two external resistors R1 and R2, the dynamic output impedance of the overall circuit, is defined as: Z’ = ΔV ΔI ≈ ZKA 1+ R1 R2 TL431/432 Document number: DS35050 Rev. 2 - 2 3 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Test Circuits N EW PRODUCT Figure 1. Test circuit for VKA = VREF Figure 2. Test circuit for VKA > VREF Figure 3. Test circuit for IOFF TL431/432 Document number: DS35050 Rev. 2 - 2 4 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics 2600 2580 IKA = 10mA V KA = VREF TA = 25 °C 0.2 R1 = 10KΩ R2 = ∞ IKA = 10mA V REF Reference Voltage (mV) IREF Reference Current ( μA) 2560 2540 2520 2500 2480 2460 2440 2420 2400 -55 -35 0.15 N EW PRODUCT 0.1 0.05 -15 5 25 45 65 85 105 125 TA Free Air Temperature ( °C) Reference Voltage vs. Free Air Temperature 0 -55 -15 5 25 45 65 85 105 125 TA Free Air Temperature ( °C) Reference Current vs. Free Air Temperature -35 150 V KA = VREF TA = 25 °C 200 V KA = VREF TA = 25 °C 100 IKA Cathode Current (mA) IKA Cathode Current ( μA) 100 IKMIN 50 0 0 -50 - 100 -2 0 1 2 V KA Cathode Voltage (V) Cathode Current vs. Cathode Voltage -1 3 -100 -2 0 1 2 V KA Cathode Voltage Cathode Current vs. Cathode Voltage -1 3 TL431/432 Document number: DS35050 Rev. 2 - 2 5 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued) 0.50 0.45 IKOFF Off-State Cathode Current (μ A) V KA = 36V V REF = 0 -0.2 V KA = 3V t o 36V -0.3 -0.4 dV REF/dV KA (mV/V) 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 -75 -25 0 25 50 75 100 125 TA Free Air Temperature (°C) Off-State Cathode Current vs. Free Air Temperature -50 -0.5 -0.6 -0.7 -0.8 -0.9 - 1.0 -50 N EW PRODUCT 75 0 25 50 100 125 TA Free Air Temperature (C) Ratio of Delta Reference Voltage to Delta Cathode Voltage vs. Free Air Temperature -25 400 V N = Equivalent Input Noise Voltage nV/√Hz 380 360 340 320 300 280 260 240 220 200 10 IKA = 10mA V KA = VREF TA = 25°C 1K 10K 100K f- Frequency (Hz) Equivalent Input Noise Voltage vs. Frequency 100 TL431/432 Document number: DS35050 Rev. 2 - 2 6 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued) 15 Vn - Equivalent Input Noise Voltage - μ V IKA = 10mA V KA = VREF TA = 25 °C 10 5 0 N EW PRODUCT -5 -10 - 15 0 4 5 6 7 8 9 10 Time (Seconds) Equivalent Input Noise Voltage Over A 10-S Period 1 2 3 Figure 4. Test circuit for noise input voltage TL431/432 Document number: DS35050 Rev. 2 - 2 7 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued) 70 A V Small-Signal Voltage Amplification (dB) IKA = 10mA 60 50 40 30 20 10 0 100 TA = 25 °C N EW PRODUCT 10M 10K 100K 1M f Frequency (Hz) Small-Signal Voltage Amplification vs. Frequency 1K Test circuit for voltage amplification 100.0 IKA = 10mA TA = 25 °C ZKA Reference Impedance (Ω ) 10.0 1.0 0.1 Test circuit for reference impedance 0.0 1K 100K 1M f Frequency (Hz) Reference Impedance vs. Frequency 10K 10M TL431/432 Document number: DS35050 Rev. 2 - 2 8 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued) 6 Input TA = 25 °C 5 Input and Output Voltage (V) 4 N EW PRODUCT 3 Out put 2 1 Test Circuit for Pulse Response 0 0 1 2 3 5 6 7 t Time (μs) Pulse Response D 4 8 9 10 100 90 80 IKA - Cathode Current - mA D TA = 25 °C C C A B 70 Stable Stable Stable 60 50 40 30 20 10 A VKA = V REF B V KA = 5V C V KA = 10V D V KA = 15V B Test Circuit for Curve A 0 0.00001 0.0001 0.001 0.01 0.1 1 C L -Load Capacitance - uF Stability Boundary Conditions 10 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. TL431/432 Document number: DS35050 Rev. 2 - 2 9 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Applications Information   N EW PRODUCT Shunt Regulator Higher Current Shunt Regulator Output Control of a Three Terminal Fixed Regulator Series Regulator Single Supply Comparator with Temperature Compensated Threshold Over Voltage / Under Voltage Protection Circuit TL431/432 Document number: DS35050 Rev. 2 - 2 10 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Ordering Information TL43 X X XX - 7 Pinout Pinout variation 1: Standard pinout 2: Reversed pinout in SOT23 Tolerance A: ±1.0% B: ±0.5% Package SA: SOT23 W5: SOT25 Packing 7: Tape & Reel N EW PRODUCT Device (Note 7) TL431A(B)SA-7 TL431A(B)W5-7 TL432A(B)SA-7 Notes: Package Code SA W5 SA Packaging (Note 5) SOT23 SOT25 SOT23 7” Tape and Reel Part Number Quantity Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7 3000/Tape & Reel -7 Ammo Box Quantity NA NA NA Part Number Suffix NA NA NA 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. TL431/432 Document number: DS35050 Rev. 2 - 2 11 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Marking Information (1) SOT23 ( Top View ) 3 XX Y W X N EW PRODUCT 1 Device TL431ASA TL431BSA TL432ASA TL432BSA 2 XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green Package SOT23 SOT23 SOT23 SOT23 Identification Code AA AB BA BB (2) SOT25 ( Top View ) 5 4 7 XX Y W X 1 2 3 XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green Device TL431AW5 TL431BW5 Package SOT25 SOT25 Identification Code AA AB TL431/432 Document number: DS35050 Rev. 2 - 2 12 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Package Outline Dimensions (All Dimensions in mm) (1) Package type: SOT25 N EW PRODUCT (2) Package Types: SOT23 TL431/432 Document number: DS35050 Rev. 2 - 2 13 of 14 www.diodes.com September 2010 © Diodes Incorporated TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR 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). 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