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. 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 -40°C to +125°C as standard. ZTL431_F SOT23, ZTL431_FF SOT23F (Top View) Cathode 3 1 Anode 2 Ref ZTL432_F SOT23, ZTL432_FF SOT23F (Top View) Ref 3 1 Anode Cathode 2 ZTL431_H6, SOT363 (Top View) Cathode 1 Features N/C Ref 3 Temperature Range ................ -40°C to +125°C Reference Voltage Tolerance at +25°C 0.5%.......................................B grade 1% .........................................A grade 0.2Ω 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) † 6 Anode 2 5 N/C 4 NC †Connected internally to substrate; should be left floating or connected to Anode ZTL431ASE5 SOT25 (Top View) Cathode 1 5 N/C Anode 2 4 N/C Applications Ref 3 ZTL431_E5 SOT25 (Top View) Opto-Coupler Linearization Linear Regulators Improved Zener Variable Reference † N/C 1 5 Anode N/C* 2 Cathode 3 4 Ref *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. 17 - 2 1 of 10 www.diodes.com August 2015 © Diodes Incorporated ZTL431/ZTL432 Absolute Maximum Ratings (Voltages specified are relative to the ANODE pin unless otherwise stated.) Parameter Rating Unit 20 V 150 mA Cathode Voltage (VKA) Continuous Cathode Current (IKA) Reference Input Current Range (IREF) Operating Junction Temperature Storage Temperature -50µA 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 = +25°C, TJ = +150°C SOT23 SOT23F SOT25 SOT363 380°C/W 138°C/W 250°C/W 380°C/W 330mW 900mW 500mW 330mW Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Symbol Min Max Unit VKA Cathode Voltage Parameter VREF 20 V IKA Cathode Current 1 100 mA TA Operating Ambient Temperature Range -40 +125 °C Electrical Characteristics Symbol (@TA = +25°C, unless otherwise specified.) Parameter VREF Reference Voltage VKA = VREF IKA = 10mA VDEV Deviation of Reference Voltage Over Full Temperature Range VKA = VREF IKA = 10 mA VREF VKA Conditions ZTL43_A Min 2.475 Typ 2.5 Max 2.525 ZTL43_B 2.487 2.5 2.513 TA = 0 to +70° - 6 16 TA = -40 to +85°C - 14 34 TA = -40 to +125°C - 14 34 VKA = VREF to 10 - -1.4 -2.7 VKA = 10V to 20V - -1.0 -2.0 Ratio of Change In Reference Voltage To the Change In Cathode Voltage IKA = 10mA Reference Input Current IKA = 10mA, R1 = 10kΩ, R2 = OC Units V mV mV/V - 2 4 - 0.8 1.2 IREF IKA = 10mA R1 = 10kΩ IREF Deviation Over Full Temperature Range R2 = OC TA = 0 to +70°C TA = -40 to +85°C - 0.8 2.5 TA = -40 to +125°C - 0.8 2.5 IKA(MIN) Minimum Cathode Current for Regulation VKA = VREF - - 0.4 0.6 mA Off-State Current VKA = 20V, VREF = 0V - - 0.1 0.5 µA Dynamic Output Impedance VKA = VREF, f = 0Hz - - 0.2 0.5 Ω IREF IKA(OFF) RZ ZTL431/ZTL432 Document number: DS33263 Rev. 17 - 2 2 of 10 www.diodes.com µA µA August 2015 © Diodes Incorporated ZTL431/ZTL432 Typical Characteristics IKA = 10mA Reference Voltage vs. Temperature VREF = VKA Dynamic Impedance vs. Frequency Power Dissipation (mW) 1000 SOT23F 900 800 700 600 SOT23-5 500 400 300 SOT23 SC70-6 200 100 0 0 25 50 75 100 125 Ambient Temperature (°C) Power Dissipation Derating ZTL431/ZTL432 Document number: DS33263 Rev. 17 - 2 3 of 10 www.diodes.com August 2015 © Diodes Incorporated ZTL431/ZTL432 Typical Characteristics (continued) VKA IKA 60 Gain (dB) 50 40 30 20 10 0 100 1000 10000 100000 1000000 Frequency (Hz) IKA 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 40 30 20 10 0 10.0E-12 100.0E-12 1.0E-9 10.0E-9 100.0E-9 1.0E-6 Load Capacitance (F) Stability Boundary Condition ZTL431/ZTL432 Document number: DS33263 Rev. 17 - 2 VREF < VKA < 20, IKA = 10mA, TA = 25°C Test Circuit for Stabilty Boundary Conditions 4 of 10 www.diodes.com August 2015 © 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+ In VOUT Out 30Ω Common R1 0.01µF VREF R1 VOUT R2 VREF R2 VOUT(MIN) = VREF + VREG VREF VOUT VOUT Output control of a three terminal fixed regulator VREF Series regulator V+ R1 V+ R1 Output VREF VON~ 2V VOFF = V+ R2a VREF Output Input VTH = 2.5V R2b VREF VREF Single supply comparator with temperature compensated threshold ZTL431/ZTL432 Document number: DS33263 Rev. 17 - 2 Over voltage / under voltage protection circuit 5 of 10 www.diodes.com August 2015 © 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. The average temperature coefficient of the reference input voltage, VREF is defined as: VREF(ppm/°C) = VDEV 1,000,000 VREF(T1-T2) The dynamic output impedance, Rz, is defined as: RZ = ΔVZ ΔIZ 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. 17 - 2 6 of 10 www.diodes.com August 2015 © Diodes Incorporated ZTL431/ZTL432 Ordering Information Tol. 1% 0.5% Ordering Code Pack Part Mark Status* Reel Size Tape Width (mm) Quantity per Reel ZTL431AE5TA ZTL431AFFTA ZTL431AFTA ZTL431AH6TA ZTL431ASE5TA ZTL432AFFTA ZTL432AFTA ZTL431BE5TA ZTL431BFFTA ZTL431BFTA ZTL431BH6TA ZTL432BFFTA ZTL432BFTA SOT25 SOT23F SOT23 SOT363 SOT25 SOT23F SOT23 SOT25 SOT23F SOT23 SOT363 SOT23F SOT23 31A 31A 31A 31A S2A 32A 32A 31B 31B 31B 31B 32B 32B Active Active Active Active Active Active Active Active Active Active Active Active Active 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 7”, 180mm 8 8 8 8 8 8 8 8 8 8 8 8 8 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 Package Outline Dimensions Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. SOT23 All 7° H K1 GAUGE PLANE 0.25 J K a M A L C L1 B D G F 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 8° All Dimensions in mm SOT23F c D b Seating Plane SOT23F Dim Min Max Typ A 0.80 1.00 0.90 b 0.35 0.45 0.40 c 0.06 0.16 0.11 D 2.80 3.00 2.90 e 0.95 e1 1.90 E 2.30 2.50 2.40 E1 1.50 1.70 1.60 k 1.10 1.26 1.18 L 0.48 0.68 0.58 L1 0.39 0.41 0.40 R 0.05 0.15 0.10 All Dimensions in mm L1 E1 E e1 e R L A k ZTL431/ZTL432 Document number: DS33263 Rev. 17 - 2 7 of 10 www.diodes.com August 2015 © Diodes Incorporated ZTL431/ZTL432 Package Outline Dimensions (continued) Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. SOT363 SOT363 Dim Min Max Typ A 0.10 0.30 0.25 B 1.15 1.35 1.30 C 2.00 2.20 2.10 D 0.65 Typ F 0.40 0.45 0.425 H 1.80 2.20 2.15 J 0 0.10 0.05 K 0.90 1.00 1.00 L 0.25 0.40 0.30 M 0.10 0.22 0.11 0° 8° All Dimensions in mm A B C H K M J D L F A SOT25 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 B C H K M N J L D Suggested Pad Layout Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. SOT23 Y Z Dimensions Value (in mm) Z 2.9 X 0.8 Y 0.9 C 2.0 E 1.35 C E X SOT23F X C Dimensions C X Y Y1 Y1 Value (in mm) 0.95 0.80 1.110 3.000 Y ZTL431/ZTL432 Document number: DS33263 Rev. 17 - 2 8 of 10 www.diodes.com August 2015 © Diodes Incorporated ZTL431/ZTL432 Suggested Pad Layout (continued) Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. SOT363 C2 C2 Z Dimensions Value (in mm) Z 2.5 G 1.3 X 0.42 Y 0.6 C1 1.9 C2 0.65 C1 G Y X SOT25 C2 Z Dimensions Value (in mm) Z 3.20 G 1.60 X 0.55 Y 0.80 C1 2.40 C2 0.95 C2 C1 G Y X ZTL431/ZTL432 Document number: DS33263 Rev. 17 - 2 9 of 10 www.diodes.com August 2015 © Diodes Incorporated ZTL431/ZTL432 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 reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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