AZ431-A ADJUSTABLE PRECISION SHUNT REGULATORS Description Features The AZ431-A is a three-terminal adjustable shunt regulator with guaranteed thermal stability over a full operation range. It features sharp turn-on characteristics, low temperature coefficient and low output impedance, which make it ideal substitute for Zener diode in applications such as switching power supply, charger and other adjustable regulators. The output voltage of AZ431-A can be set to any value between VREF (2.5V) and the corresponding maximum cathode voltage (36V). The AZ431-A precision reference is offered in two voltage tolerance: 0.4% and 0.8%. Applications This IC is available in 4 packages: TO92 (bulk or ammo packing), SOT23, SOT25 and SOT89. Notes: Programmable Precise Output Voltage from 2.5V to 36V High Stability under Capacitive Load Low Temperature Deviation: 4.5mV Typical Low Equivalent Full-range Temperature Coefficient with 20PPM/oC Typical Sink Current Capacity from 1mA to 100mA Low Output Noise Wide Operating Range of -40 to +125oC Lead-Free Packages: TO92, SOT23, SOT25, SOT89 Totally Lead-Free; RoHS Compliant (Notes 1 & 2) Lead-Free Packages, Available in “Green” Molding Compound: TO92, SOT23, SOT25, SOT89 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Charger Voltage Adapter Switching Power Supply Graphic Card Precision Voltage Reference 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 Pin Assignments (Top View) (Top View) (Top View) ANODE 3 1 REF 2 CATHODE SOT23 AZ431-A Document number: DS36721 Rev. 5 - 2 1 2 REF ANODE 3 CATHODE SOT89 (Option 1) 1 of 21 www.diodes.com 1 2 REF ANODE 3 CATHODE SOT89 (Option 2) September 2015 © Diodes Incorporated AZ431-A Pin Assignments (Cont.) (Top View) NC 1 * 2 (Top View) 5 ANODE (Note 4) CATHODE 3 4 REF SOT25 Note 4: (Top View) 3 CATHODE 3 CATHODE 2 2 ANODE 1 REF ANODE 1 REF TO92 (Bulk Packing) TO92 (Ammo Packing) * Pin 2 is attached to substrate and must be connected to ANODE or open. Typical Applications Circuit Shunt Regulator High Current Shunt Regulator AZ431-A Document number: DS36721 Rev. 5 - 2 2 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Typical Applications Circuit (Cont.) Current Source or Current Limit Precision 5V 1A Regulator PWM Converter with Reference AZ431-A Document number: DS36721 Rev. 5 - 2 3 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Functional Block Diagram Absolute Maximum Ratings (Note 5) Symbol Parameter VKA Cathode Voltage IKA Cathode Current Range (Continuous) IREF Reference Input Current Range PD Power Dissipation Rating Unit 40 V -100 to 150 mA 10 mA Z, R Package: 770 mW N, K Package: 370 Thermal Resistance (Junction to Ambient) θJA TJ Note 5: SOT23 380 SOT25 380 TO92 165 SOT89 165 Junction Temperature TSTG Storage Temperature Range ESD ESD (Human Body Model) o C/W +150 ºC -65 to +150 ºC 2000 V Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Symbol Parameter Min Max Unit VKA Cathode Voltage VREF 36 V IKA Cathode Current 1.0 100 mA TA Operating Ambient Temperature Range -40 +125 ºC AZ431-A Document number: DS36721 Rev. 5 - 2 4 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Electrical Characteristics Symbol Test Circuit VREF 4 (@TA = +25°C, unless otherwise specified.) Parameter Conditions Min Typ Max 2.490 2.500 2.510 2.480 2.500 2.520 0 to +70oC – 4.5 8 -40 to +85oC – 4.5 10 o -40 to +125 C – 4.5 16 VKA = 10V to VREF – -1.0 -2.7 – -0.5 -2.0 – 0.7 4 µA 0.4% VKA = VREF, IKA = 10mA Reference Voltage V 0.8% VREF VREF VKA 4 5 Unit Deviation of Reference Voltage Over Full Temperature Range Ratio of Change in Reference Voltage to the Change in Cathode Voltage VKA = VREF IKA = 10mA IKA = 10mA VKA = 36V to 10V IKA = 10mA, R1 = 10KΩ, R2 = mV mV/V IREF 5 Reference Current IREF 5 Deviation of Reference Current Over Full Temperature Range IKA = 10mA, R1 = 10KΩ R2 = ∞, TA = -40 to +125oC – 0.4 1.2 µA 4 Minimum Cathode Current for Regulation VKA = VREF – 0.4 1.0 mA 6 Off-state Cathode Current VKA = 36V, VREF = 0 – 0.05 1.0 µA 4 Dynamic Impedance VKA = VREF, IKA = 1 to 100mA, – 0.15 0.5 Ω SOT23 – 135.48 – SOT25 – 135.48 – – TO92 – 81.63 – – SOT89 – 29.80 – IKA (Min) IKA (Off) ZKA – – θJC ∞ f ≤ 1.0KHz o Thermal Resistance AZ431-A Document number: DS36721 Rev. 5 - 2 C/W 5 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Electrical Characteristics (Cont.) Test Circuit 4 for VKA = VREF Test Circuit 5 for VKA > VREF Test Circuit 6 for IOFF AZ431-A Document number: DS36721 Rev. 5 - 2 6 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Performance Characteristics Reference Voltage vs. Ambient Temperature Reference Current vs. Ambient Temperature 1.5 2.510 VKA = VREF IKA=10mA Reference Current (A) Reference Voltage (V) R1=10K,R2=Infinite IKA = 10mA 2.505 2.500 2.495 1.0 0.5 2.490 2.485 -60 -40 -20 0 20 40 60 80 100 120 0.0 -60 140 -40 -20 0 o 60 80 100 120 140 Cathode Current vs. Cathode Voltage 800 VKA=VREF VKA=VREF 0 0 TA=25 C TA=25 C 600 Cathode Current (A) 100 Cathode Current (mA) 40 Ambient Temperature ( C) Cathode Current vs. Cathode Voltage 150 20 0 Ambient Temperature ( C) 50 0 400 200 0 -50 -200 -100 -2 -1 0 1 2 3 -1.0 -0.5 0.0 0.5 Cathode Voltage (V) 1.0 1.5 2.0 2.5 Cathode Voltage (V) Off-State Cathode Current vs. Ambient Temperature Ratio of Delta Reference Voltage to the Ratio of Delta Cathode Voltage 1.8 VKA=36V 1.6 VREF=0 -0.9 VKA=3.5V to 36V -1.0 1.4 VREF / VKA (mV/V) Off-State Cathode Current (A) 2.0 1.2 1.0 0.8 0.6 0.4 -1.1 -1.2 -1.3 0.2 -1.4 0.0 -40 -20 0 20 40 60 80 100 -40 120 o AZ431-A Document number: DS36721 Rev. 5 - 2 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Ambient Temperature ( C) 7 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Performance Characteristics (Cont.) Small Signal Voltage Gain vs. Frequency 70 0 TA=25 C 60 IKA=10mA Voltage Gain (dB) 50 40 30 20 10 0 -10 1k 10k 100k 1M Small Signal Frequency (Hz) Reference Impedance vs. Frequency Reference Impedance () IKA=10mA o 10 TA=25 C 1 0.1 1K 10K 100K 1,000K Frequency (Hz) Stability Boundary Conditions vs. Load Capacitance 100 VKA=VREF VKA= 5V VKA=10V VKA=15V: No Oscillation 90 Cathode Current (mA) 80 70 60 50 Stable Stable 40 30 20 10 0 1E-3 0.01 0.1 1 10 100 Load Capacitance (F) AZ431-A Document number: DS36721 Rev. 5 - 2 8 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Performance Characteristics (Cont.) Pulse Response of Input and Output Voltage 5 Input and Output Voltage (V) Input 4 3 Output 2 1 0 0 2 4 6 Time (S) AZ431-A Document number: DS36721 Rev. 5 - 2 9 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Ordering Information AZ431 X X- X XX XX Product Name Voltage Tolerance Package Cathode Voltage A : 0.4% B : 0.8% N : SOT23 K : SOT25 R : SOT89 Z : TO92 A: 40V Packing TR : Tape & Reel E1 : RoHS Compliant or Ammo G1 : Green Blank : Bulk Part Number Package Temperature Range Pb Lead-Free SOT23 SOT25 TO92 Green RoHS Compliant Green 0.4% AZ431ANATRE1 AZ431ANATRG1 EA1 GA1 3000/ Tape & Reel 0.8% AZ431BNATRE1 AZ431BNATRG1 EA2 GA2 3000/ Tape & Reel 0.4% AZ431AKATRE1 AZ431AKATRG1 E3A G3A 3000/ Tape & Reel 0.8% AZ431BKATRE1 AZ431BKATRG1 E3B G3B 3000/ Tape & Reel 0.4% AZ431AZ-AE1 AZ431AZ-AG1 AZ431AZ-AE1 AZ431AZ-AG1 1000/ Bulk 0.4% AZ431AZATRE1 AZ431AZATRG1 AZ431AZ-AE1 AZ431AZ-AG1 2000/ Ammo 0.8% AZ431BZ-AE1 AZ431BZ-AG1 AZ431BZ-AE1 AZ431BZ-AG1 1000/ Bulk 0.8% AZ431BZATRE1 AZ431BZATRG1 AZ431BZ-AE1 AZ431BZ-AG1 2000/ Ammo 0.4% AZ431ARATRE1 AZ431ARATRG1 E43A G43A 1000/ Tape & Reel 0.8% AZ431BRATRE1 AZ431BRATRG1 E43B G43B 1000/ Tape & Reel -40 to +125C Pb Lead-Free SOT89 Packing RoHS Compliant -40 to +125C Pb Lead-Free Marking ID -40 to +125C Pb Lead-Free Voltage Tolerance E1/G1 -40 to +125C AZ431-A Document number: DS36721 Rev. 5 - 2 10 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Marking Information (1) TO92 (Top View) XXXXX XZ-XX1 YWWAXX First and Second Lines: Logo and Marking ID (See Ordering Information) Third Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code XX: 7th and 8th Digits of Batch Number 3 (2) SOT23 (Top View) XXX AZ431-A Document number: DS36721 Rev. 5 - 2 : Logo XXX: Marking ID (See Ordering Information) 11 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Marking Information (Cont.) (3) SOT25 (Top View) XXX (4) : Logo XXX: Marking ID (See Ordering Information) SOT89 (Top View) XXXX AZ431-A Document number: DS36721 Rev. 5 - 2 : Logo XXXX: Marking ID (See Ordering Information) 12 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Package Outline Dimensions (All dimensions in mm.) (1) Package Type: TO92 (Bulk Packing) 1.000(0. 039) 3.430(0. 135) MIN 3.700(0.146) 3.300(0.130) 1.400(0. 055) 0.320(0. 013) 0.510(0. 020) 0. 000(0. 000) 0. 380(0. 015) Φ1. 600(0. 063) MAX 4.700(0.185) 1.270(0. 050) TYP AZ431-A Document number: DS36721 Rev. 5 - 2 15.500(0.610) 0.360(0. 014) 0.760(0. 030) 12.500(0.492) 4.300(0.169) 4.400(0. 173) 4.800(0. 189) 2.420(0. 095) 2.660(0.105) 13 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Package Outline Dimensions (Cont. All dimensions in mm.) (2) Package Type: TO92 (Ammo Packing) 1. 100(0. 043) 1.270(0. 050) Typ 3. 430(0.135) MIN 3.800(0.150) 2.500(0. 098) 4.000 (0.157 ) 0.000(0.000) 0.380(0.015) Φ1. 600(0. 063) MAX 14.500(0.571) 0. 320(0. 013) 0. 510(0. 020) 12.500(0.492) 3.300(0.130) 1. 400(0. 055) 4.700(0.185) 4.300(0.169) 4.400(0. 173) 4.800 (0.189 ) 13.000(0. 512) 15.000 (0.591 ) 0.380(0.015) 0.550(0.022 ) 2.540(0.100) Typ AZ431-A Document number: DS36721 Rev. 5 - 2 14 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Package Outline Dimensions (Cont. All dimensions in mm.) (3) Package Type: SOT23 3.0 ° 7.0° 0.500(0.020) 0.700(0.028) 2.0° 1.050(0.041)REF 0.0°~10.0° 0.010(0.0004) 0.100(0.004) 0.200(0.008)MIN Document number: DS36721 Rev. 5 - 2 7.0° 0.080(0.003) 0.180(0.007) 0.550(0.022)REF 1.200(0.047) 1.400(0.055) 2.300(0.091) 2.500(0.098) AZ431-A R0.100(0.004) 0.900(0.035) 1.100(0.043) 2.800(0.110) 3.000(0.118) 0.890(0.035) 1.030(0.041) 0.100(0.004) GAUGE PLANE 4×R0.100(0.004) 0.300(0.012) 0.510(0.020) 1.900(0.075)REF 15 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Package Outline Dimensions (Cont. All dimensions in mm.) (4) Package Type: SOT25 0.300(0.012) 0.600(0.024) 0.100(0.004) 0.200(0.008) 1.500(0.059) 1.700(0.067) 3.000(0.118) 2.650(0.104) 2.820(0.111) 3.100(0.122) 0.200(0.008) 0.700(0.028) REF 0.300(0.012) 0.500(0.020) 0° 8° 1.800(0.071) 2.000(0.079) 0.000(0.000) MAX 1.450(0.057) 0.950(0.037) TYP 0.150(0.006) 0.900(0.035) 1.300(0.051) AZ431-A Document number: DS36721 Rev. 5 - 2 16 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Package Outline Dimensions (Cont. All dimensions in mm.) (5) Package Type: SOT89 1.400(0.055) 1.600(0.063) 4.400(0.173) 4.600(0.181) Option 1 2.300(0.091) 2.600(0.102) 3.950(0.156) 4.250(0.167) 2.060(0.081)REF 3 0.900(0.035) 1.200(0.047) 0.350(0.014) 0.450(0.018) 0.320(0.013) 0.540(0.021) 0.480(0.019) 0.620(0.024) 0.320(0.013) 0.540(0.021) 3.000(0.118) TYP 10 3 R0.150(0.006) 10 Option 1 Option 2 1.550(0.061)REF 1.030(0.041)REF R 0.200(0.008) 0.320(0.013)REF 45 AZ431-A Document number: DS36721 Rev. 5 - 2 2.630(0.104) 2.930(0.115) 1.620(0.064)REF 2.210(0.087)REF 1.500(0.059) 1.620(0.064) 1.800(0.071) 1.830(0.072) 17 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Suggested Pad Layout (1) Package Type: SOT23 Grid placement courtyard Y Z G Y X E Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch) Value 2.900/0.114 1.100/0.043 0.800/0.031 0.900/0.035 0.950/0.037 AZ431-A Document number: DS36721 Rev. 5 - 2 18 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Suggested Pad Layout (Cont.) (2) Package Type: SOT25 E2 G Z E1 Y X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E1 (mm)/(inch) E2 (mm)/(inch) Value 3.600/0.142 1.600/0.063 0.700/0.028 1.000/0.039 0.950/0.037 1.900/0.075 AZ431-A Document number: DS36721 Rev. 5 - 2 19 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A Suggested Pad Layout (Cont.) (3) Package Type: SOT89 X1 Z X2 Y1 Y E X Dimensions Z (mm)/(inch) X (mm)/(inch) X1 (mm)/(inch) X2 (mm)/(inch) Y (mm)/(inch) Y1 (mm)/(inch) E (mm)/(inch) Value 4.600/0.181 0.550/0.022 1.850/0.073 0.800/0.031 1.300/0.051 1.475/0.058 1.500/0.059 AZ431-A Document number: DS36721 Rev. 5 - 2 20 of 21 www.diodes.com September 2015 © Diodes Incorporated AZ431-A 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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LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components 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 devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, 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 representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2015, Diodes Incorporated www.diodes.com AZ431-A Document number: DS36721 Rev. 5 - 2 21 of 21 www.diodes.com September 2015 © Diodes Incorporated