NOT RECOMMENDED FOR NEW DESIGN USE AS431 ZTL431/ZTL432 COST EFFECTIVE ADJUSTABLE PRECISION SHUNT REGULATOR Description Pin Assignments The ZTL431 and ZTL432 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 20 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. (Top View) Cathode 3 1 Anode Ref 2 SOT23, SOT23F (ZTL431) The ZTL432 has the same electrical specifications as the ZTL431 but has a different pin out in SOT23 (F-suffix) and SOT23F (FF-suffix). Both variants are available in two grades with initial tolerances of 1% and 0.5% for the A and B grades, respectively. These are functionally equivalent to the TL431/TL432 except for maximum operation voltage, and have an ambient temperature range of -40C to +125C as standard. * * * * * * Temperature Range ................ -40C to +125C Reference Voltage Tolerance at +25C 0.5%.......................................B grade 1% .........................................A grade 0.2 Typical Output Impedance Sink Current Capability........ 1mA to 100mA Adjustable Output Voltage......VREF to 20V Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. "Green" Device (Note 3) An Automotive-Compliant Part is Available Under Separate Datasheet (ZTL431AQ, ZTL431BQ, ZTL432AQ, ZTL432BQ) Applications * * * * Ref 3 1 Anode Cathode 2 SOT23, SOT23F (ZTL432) (Top View) Features * * (Top View) Cathode 1 N/C 2 5 N/C Ref 3 4 NC SOT363 Connected internally to substrate; should be left floating or connected to Anode (Top View) Cathode 1 5 N/C Anode 2 Ref 3 Opto-Coupler Linearization Linear Regulators Improved Zener Variable Reference 6 Anode 4 N/C SOT25 (SE5 Package) (Top View) N/C 1 5 Anode N/C* 2 Cathode 3 4 Ref SOT25 (E5 Package) *must be left floating or connected to pin 5 Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated's definitions of Halogen and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green" products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 1 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Absolute Maximum Ratings (Voltages specified are relative to the Anode pin unless otherwise stated.) Parameter Rating Unit Cathode Voltage (VKA) 20 V Continuous Cathode Current (IKA) 150 mA Reference Input Current Range (IREF) Operating Junction Temperature Storage Temperature -50A to +10mA -- -40 to +150 -55 to +150 C C Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Package Thermal Data Package JA PDIS TA = +25C, TJ = +150C SOT23 SOT23F SOT25 SOT363 380C/W 138C/W 250C/W 380C/W 330mW 900mW 500mW 330mW Recommended Operating Conditions (@TA = +25C, unless otherwise specified.) Symbol Parameter Min Max Unit VKA Cathode Voltage VREF 20 V IKA Cathode Current 1 100 mA TA Operating Ambient Temperature Range -40 +125 C Electrical Characteristics (@TA = +25C, unless otherwise specified.) Symbol Parameter Conditions ZTL43_A Min 2.475 Typ 2.5 Max 2.525 ZTL43_B 2.487 2.5 2.513 VREF Reference Voltage VKA = VREF IKA = 10mA VDEV Deviation of Reference Voltage Over Full Temperature Range VKA = VREF IKA = 10mA Ratio of Change In Reference Voltage To the Change In Cathode Voltage IKA = 10mA Reference Input Current IKA = 10mA, R1 = 10k, R2 = O/C (Open Circuit) VREF VKA IREF IREF IKA(MIN) IKA(OFF) RZ TA = 0 to +70C -- 6 16 TA = -40 to +85C -- 14 34 TA = -40 to +125C -- 14 34 VKA = VREF to 10V -- -1.4 -2.7 VKA = 10V to 20V -- -1.0 -2.0 -- 2 4 Unit V mV mV/V A IKA = 10mA R1 = 10k IREF Deviation Over Full Temperature Range R2 = O/C (Open Circuit) TA = 0 to +70C -- 0.8 1.2 TA = -40 to +85C -- 0.8 2.5 TA = -40 to +125C -- 0.8 2.5 Minimum Cathode Current for Regulation VKA = VREF -- -- 0.4 0.6 mA Off State Current VKA = 20V, VREF = 0V -- -- 0.1 0.5 A Dynamic Output Impedance VKA = VREF, f = 0Hz -- -- 0.2 0.5 ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 2 of 13 www.diodes.com A January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Typical Characteristics IKA = 10mA Reference Voltage vs. Temperature VREF = VKA Dynamic Impedance vs. Frequency Power Dissipation (mW) 1000 800 700 600 Document number: DS33263 Rev. 19 - 3 SOT23-5 SOT25 500 400 300 SOT23 SC70-6 SOT36 3 200 100 0 ZTL431/ZTL432 SOT23F 900 0 25 50 75 Ambient Temperature (C) Power Dissipation Derating 3 of 13 www.diodes.com 100 125 January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Typical Characteristics (Cont.) VKA IKA 60 Gain (dB) 50 40 30 20 10 0 100 1000 10000 100000 1000000 IKA Frequency (Hz) Test Circuit for Open Loop Voltage Gain Gain vs. Frequency VKA VKA Pulse Response Test Circuit for Pulse Response VKA 100 Cathode Current (mA) 90 IKA 80 70 60 50 Stable Stable ab be 40 30 20 10 0 10.0E-12 100.0E-12 1.0E-9 10.0E-9 100.0E-9 Load Capacitance (F) Stability Boundary Condition ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 1.0E-6 25C VKA 20, IIKA 10mA,TATA= =+25C VVREF < <VKA << 20V, REF KA==10mA, Test Circuitfor for Stabilty Stability Boundary Conditions Test Circuit Boundary Conditions 4 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Application Circuits V+ V+ VOUT VOUT R1 R1 VREF VREF R2 R2 VREF VOUT VREF VOUT Higher current shunt regulator Shunt regulator V+ ZSR*** V+ VOUT Out In Common 30 R1 0.01F VREF R1 R2 VREF VOUT R2 VOUT(MIN) = VREF + VREG VREF VOUT VOUT Output control of a three terminal fixed regulator VREF Series regulator V+ V+ Input VTH = 2.5V R1 R1 Output VREF VON~ 2V VOFF = V+ R2a R2 R1 R1 VREF Output R2b R2 VREF VREF Single supply comparator with temperature compensated threshold ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 Over voltage / under voltage protection circuit 5 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 DC Test Circuits Notes Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference input voltage over the full temperature range. VMAX The average temperature coefficient of the reference input voltage, VREF is defined as: VREF(ppm/C) = VDEV x 1,000,000 VREF(T1-T2) VMIN The dynamic output impedance, Rz, is defined as: VDEV = VMAX - VMIN RZ = VZ IZ When the device is programmed with two external resistors, R1 and R2, (Figure 2), the dynamic output impedance of the overall circuit, R'z, is defined as: R'Z = RZ (1 + R1 ) R2 Stability Boundary The ZTL431 and ZTL432 are stable with a range of capacitive loads. A zone of instability exists as demonstrated in the typical characteristic graph on page 4. The graph shows typical conditions. To ensure reliable stability, a capacitor of 4.7nF or greater is recommended between anode and cathode. ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 6 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Ordering Information ZTL43X X X X Pinout Variation 1 : Standard Pin Out 2 : Reversed Pin Out in SOT23/SOT23F Tol. 1% 0.5% Tolerance Package Packing A : 1.0% B : 0.5% E5/SE5 : SOT25 FF : SOT23F F : SOT23 H6 : SOT363 TA : 7" Tape & Reel Part Number Package Part Mark Status Reel Size Tape Width (mm) Quantity per Reel ZTL431AE5TA SOT25 31A Active 7", 180mm 8 3,000 ZTL431AFFTA SOT23F 31A Active 7", 180mm 8 3,000 ZTL431AFTA SOT23 31A Active 7", 180mm 8 3,000 ZTL431AH6TA SOT363 31A Active 7", 180mm 8 3,000 ZTL431ASE5TA SOT25 S2A Active 7", 180mm 8 3,000 ZTL432AFFTA SOT23F 32A Active 7", 180mm 8 3,000 ZTL432AFTA SOT23 32A Active 7", 180mm 8 3,000 ZTL431BE5TA SOT25 31B Active 7", 180mm 8 3,000 ZTL431BFFTA SOT23F 31B Active 7", 180mm 8 3,000 ZTL431BFTA SOT23 31B Active 7", 180mm 8 3,000 ZTL431BH6TA SOT363 31B Active 7", 180mm 8 3,000 ZTL432BFFTA SOT23F 32B Active 7", 180mm 8 3,000 ZTL432BFTA SOT23 32B Active 7", 180mm 8 3,000 ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 7 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Marking Information (1) SOT23 and SOT23F (Top View) Part Number ZTL431AFFTA ZTL431AFTA ZTL432AFFTA ZTL432AFTA ZTL431BFFTA ZTL431BFTA ZTL432BFFTA ZTL432BFTA Identification Code 31A 31A 32A 32A 31B 31B 32B 32B XXX : Identification Code Part Number ZTL431AE5TA ZTL431ASE5TA ZTL431BE5TA Identification Code 31A S2A 31B XXX : Identification Code Part Number ZTL431AH6TA ZTL431BH6TA Identification Code 31A 31B 1 XXX 3 (2) XXX : Identification Code 2 SOT25 (Top View) 5 4 XXX 1 (3) 2 3 SOT363 (Top View) 6 5 4 XXX 1 ZTL431/ZTL432 2 Document number: DS33263 Rev. 19 - 3 3 8 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: SOT23 All 7 H K1 GAUGE PLANE 0.25 J K a M A L C L1 B D G F (2) SOT23 Dim Min Max Typ A 0.37 0.51 0.40 B 1.20 1.40 1.30 C 2.30 2.50 2.40 D 0.89 1.03 0.915 F 0.45 0.60 0.535 G 1.78 2.05 1.83 H 2.80 3.00 2.90 J 0.013 0.10 0.05 K 0.890 1.00 0.975 K1 0.903 1.10 1.025 L 0.45 0.61 0.55 L1 0.25 0.55 0.40 M 0.085 0.150 0.110 a 0 8 -All Dimensions in mm Package Type: SOT23F b D c SOT23F Dim Min Max Typ A 0.80 1.00 0.90 A1 0.00 0.10 0.01 b 0.35 0.50 0.44 c 0.10 0.20 0.16 D 2.80 3.00 2.90 e 0.95 REF e1 1.90 REF E 2.30 2.50 2.40 E1 1.50 1.70 1.65 k 1.20 L 0.30 0.65 0.50 L1 0.30 0.50 0.40 R 0.05 0.15 All Dimensions in mm L1 E E1 b e1 A1 e k ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 R L A 9 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Package Outline Dimensions (Cont.) Please see http://www.diodes.com/package-outlines.html for the latest version. (3) Package Type: SOT363 E SOT363 Dim Min Max Typ A1 0.00 0.10 0.05 A2 0.90 1.00 1.00 b 0.10 0.30 0.25 c 0.10 0.22 0.11 D 1.80 2.20 2.15 E 2.00 2.20 2.10 E1 1.15 1.35 1.30 e 0.650 BSC F 0.40 0.45 0.425 L 0.25 0.40 0.30 a 0 8 -All Dimensions in mm E1 F b D A2 c A1 (4) L e a Package Type: SOT25 A B C H K J ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 M N D L 10 of 13 www.diodes.com SOT25 Dim Min Max Typ A 0.35 0.50 0.38 B 1.50 1.70 1.60 C 2.70 3.00 2.80 D 0.95 H 2.90 3.10 3.00 J 0.013 0.10 0.05 K 1.00 1.30 1.10 L 0.35 0.55 0.40 M 0.10 0.20 0.15 N 0.70 0.80 0.75 0 8 All Dimensions in mm January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: SOT23 Y C Y1 X (2) Dimensions C X X1 Y Y1 Value (in mm) 2.0 0.8 1.35 0.9 2.9 X1 Package Type: SOT23F C X Dimensions C X Y Y1 Y1 Value (in mm) 0.95 0.80 1.110 3.000 Y (3) Package Type: SOT363 C Dimensions C G X Y Y1 G Y1 Value (in mm) 0.650 1.300 0.420 0.600 2.500 Y X ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 11 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 Suggested Pad Layout (Cont.) Please see http://www.diodes.com/package-outlines.html for the latest version. (4) Package Type: SOT25 C2 Z C2 Dimensions Z G X Y C1 C2 C1 G Y Value 3.20 1.60 0.55 0.80 2.40 0.95 X ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 12 of 13 www.diodes.com January 2021 (c) Diodes Incorporated ZTL431/ZTL432 IMPORTANT NOTICE 1. 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Notwithstanding the foregoing, Diodes reserves the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes. 8. Any unauthorized copying, modification, distribution, transmission, display or other use of this document (or any portion hereof) is prohibited. Diodes assumes no responsibility for any losses incurred by the customers or users or any third parties arising from any such unauthorized use. Copyright (c) 2021 Diodes Incorporated www.diodes.com ZTL431/ZTL432 Document number: DS33263 Rev. 19 - 3 13 of 13 www.diodes.com January 2021 (c) Diodes Incorporated