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| Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS General Description The AZ431 series ICs are three-terminal adjustable shunt regulators with guaranteed thermal stability over a full operation range. These ICs feature sharp turn-on characteristics, low temperature coefficient and low output impedance, which make them ideal substitutes for Zener diodes in applications such as switching power supply, charger and other adjustable regulators. The AZ431 series ICs contain two voltage types, AZ431-A for 40V and AZ431-B for 20V. The output voltage of both types can be set to any value between VREF(2.5V) and the corresponding maximum cathode voltage. The AZ431 precision reference is offered in two bandgap tolerance: 0.4% and 0.8%. These ICs are available in 5 Packages: TO-92, SOT-233, SOT-23-5, SOT-89 and SOIC-8. AZ431 Features * * * * * * * * * Programmable Precise Output Voltage from 2.5V to 36V or 18V Very Accurate Reference Voltage: 0.15% Typical High Stability under Capacitive Load Low Temperature Deviation: 4.5mV Typical Low Equivalent Full-range Temperature Coefficient with 20PPM/oC Typical Low Dynamic Output Resistance: 0.2 Typical Sink Current Capacity from 1mA to 100 mA Low Output Noise Wide Operating Range of -40 to 125oC Applications * * * * * Charger Voltage Adapter Switching Power Supply Graphic Card Precision Voltage Reference SOIC-8 SOT-89 TO-92 SOT-23-3 SOT-23-5 Figure 1. Package Types of AZ431 Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 1 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Pin Configuration M Package (SOIC-8) N Package (SOT-23-3) ANODE AZ431 R Package (SOT-89) CATHODE ANODE ANODE NC 1 2 3 4 8 7 6 5 REF ANODE 1 ANODE NC REF 3 2 1 2 3 CATHODE REF ANODE CATHODE Z Package (TO-92) K Package (SOT-23-5) 3 2 1 CATHODE ANODE REF NC NC CATHODE 1 2 3 5 ANODE 4 REF Figure 2. Pin Configuration of AZ431 (Top View) Functional Block Diagram CATHODE REF + - VREF ANODE Figure 3. Functional Block Diagram of AZ431 Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 2 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Ordering Information AZ431 AZ431 Circuit Type Bandage Tolerance A: 0.4% B: 0.8% Package E1: Lead-Free Blank: Tin Lead TR: Tape and Reel or Ammo Blank: Tube or Bulk A: AZ431(40V) B: AZ431(20V) M: SOIC-8 N: SOT-23-3 R: SOT-89 Z: TO-92 K: SOT-23-5 40V Products Package Temperature Range -40 to 125oC -40 to 125 C o Voltage Tolerance 0.4% 0.8% 0.4% 0.8% 0.4% Part Number Tin Lead AZ431AN-ATR AZ431BN-ATR AZ431AK-ATR AZ431BK-ATR AZ431AZ-A AZ431AZ-ATR AZ431BZ-A AZ431BZ-ATR AZ431AM-A AZ431AM-ATR AZ431BM-A AZ431BM-ATR AZ431AR-ATR AZ431BR-ATR Lead Free AZ431AN-ATRE1 AZ431BN-ATRE1 AZ431AK-ATRE1 AZ431BK-ATRE1 AZ431AZ-AE1 AZ431AZ-ATRE1 AZ431BZ-AE1 AZ431BZ-ATRE1 AZ431AM-AE1 AZ431AM-ATRE1 AZ431BM-AE1 AZ431BM-ATRE1 AZ431AR-ATRE1 AZ431BR-ATRE1 Marking ID Tin Lead N41 N42 K3A K3B AZ431AZ-A AZ431AZ-A AZ431BZ-A AZ431BZ-A AZ431AM-A AZ431AM-A AZ431BM-A AZ431BM-A 431A 431B Lead Free EA1 EA2 E3A E3B AZ431AZ-AE1 AZ431AZ-AE1 AZ431BZ-AE1 AZ431BZ-AE1 AZ431AM-AE1 AZ431AM-AE1 AZ431BM-AE1 AZ431BM-AE1 E43A E43B Packing Type Tape & Reel Tape & Reel Tape & Reel Tape & Reel Bulk Ammo Bulk Ammo Tube Tape & Reel Tube Tape & Reel Tape & Reel Tape & Reel SOT-23-3 SOT-23-5 TO-92 -40 to 125oC 0.4% 0.8% 0.8% 0.4% SOIC-8 -40 to 125 C o 0.4% 0.8% 0.8% SOT-89 -40 to 125oC 0.4% 0.8% Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 3 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Ordering Information (Continued) 20V Products Package Temperature Range -40 to 125oC -40 to 125 C o AZ431 Voltage Tolerance 0.4% 0.8% 0.4% 0.8% 0.4% Part Number Tin Lead AZ431AN-BTR AZ431BN-BTR AZ431AK-BTR AZ431BK-BTR AZ431AZ-B AZ431AZ-BTR AZ431BZ-B AZ431BZ-BTR AZ431AM-B AZ431AM-BTR AZ431BM-B AZ431BM-BTR AZ431AR-BTR AZ431BR-BTR Lead Free AZ431AN-BTRE1 AZ431BN-BTRE1 AZ431AK-BTRE1 AZ431BK-BTRE1 AZ431AZ-BE1 AZ431AZ-BTRE1 AZ431BZ-BE1 AZ431BZ-BTRE1 AZ431AM-BE1 AZ431AM-BTRE1 AZ431BM-BE1 AZ431BM-BTRE1 AZ431AR-BTRE1 AZ431BR-BTRE1 Marking ID Tin Lead N44 N45 K4A K4B AZ431AZ-B AZ431AZ-B AZ431BZ-B AZ431BZ-B AZ431AM-B AZ431AM-B AZ431BM-B AZ431BM-B 431C 431D Lead Free EA4 EA5 E4A E4B AZ431AZ-BE1 AZ431AZ-BE1 AZ431BZ-BE1 AZ431BZ-BE1 AZ431AM-BE1 AZ431AM-BE1 AZ431BM-BE1 AZ431BM-BE1 E43C E43D Packing Type Tape & Reel Tape & Reel Tape & Reel Tape & Reel Bulk Ammo Bulk Ammo Tube Tape & Reel Tube Tape & Reel Tape & Reel Tape & Reel SOT-23-3 SOT-23-5 TO-92 -40 to 125oC 0.4% 0.8% 0.8% 0.4% SOIC-8 -40 to 125oC 0.4% 0.8% 0.8% SOT-89 -40 to 125oC 0.4% 0.8% BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 4 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Absolute Maximum Ratings (Note 1) Parameter Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation Junction Temperature Storage Temperature Range Symbol VKA IKA IREF PD TJ TSTG Value AZ431 (40V): 40 V AZ431 (20V): 20 -100 to +150 10 M,Z,R Package: 770 mW N,K Package: 370 160 -65 to +150 M Package: 150 N Package: 330 Package Thermal Impedance JA Z Package: 150 R Package: 50 K Package: 250 oC/W oC oC AZ431 Unit mA mA Note 1: 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 Parameter Cathode Voltage Cathode Current Operating Ambient Temperature Range Symbol VKA IKA Min VREF 1.0 -40 Max AZ431(40V): 36 AZ431(20V): 18 100 125 Unit V mA oC Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 5 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Electrical Characteristics for AZ431(40V) Operating Conditions: TA=25oC unless otherwise specified. Parameter Reference Voltage Deviation of Reference Voltage Over-Temperature Ratio of Change in Reference Voltage to the Change in Cathode Voltage Reference Current Deviation of Reference Current Over Full Temperature Range Minimum Cathode Current for Regulation Off-State Cathode Current Dynamic Impedance 0.4% 0.8% Test Circuit 4 Symbol VREF VREF Conditions VKA=VREF, IKA=10mA VKA=VREF IKA= 10mA 0 to 70oC -40 to 85oC VKA= 10V to VREF VKA= 36V to 10V AZ431 (40V) Min 2.490 2.480 Typ 2.500 2.500 4.5 4.5 -1.0 -0.5 0.7 0.4 0.4 0.05 0.15 Max 2.510 2.520 8 mV 10 -2.7 mV/V -2.0 4 1.2 1.0 1.0 0.5 A A Unit V AZ431 4 5 VREF VKA IREF IREF IKA (MIN) IKA (OFF) ZKA IKA=10mA 5 5 4 6 4 IKA=10mA,R1=10K, R2= IKA=10mA, R1=10K R2=, TA=-40 to 85oC VKA=VREF VKA=36 V, VREF=0 VKA=VREF, IKA=1 to 100mA, f 1.0KHz mA A Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 6 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Electrical Characteristics for AZ431(20V) Operating Conditions: TA=25oC unless otherwise specified. Parameter Reference Voltage 0.4% 0.8% Test Circuit 4 Symbol VREF VREF Conditions VKA=VREF, IKA=10mA VKA=VREF IKA=10mA 0 to 70oC -40 to 85 oC AZ431 AZ431 (20V) Min 2.490 2.480 Typ Max 2.500 2.510 2.500 2.520 4.5 4.5 -1.0 -0.5 0.7 0.4 0.4 0.05 0.2 8 Unit V Deviation of Reference Voltage Over-Temperature Ratio of Change in Reference Voltage to the Change in Cathode Voltage Reference Current Deviation of Reference Current Over Full Temperature Range Minimum Cathode Current for Regulation Off-State Cathode Current Dynamic Impedance 4 mV 10 -2.7 mV/V -2.0 4 1.2 1.0 1.0 0.5 A A mA A 5 VREF VKA IREF IREF IKA (MIN) IKA (OFF) ZKA IKA=10mA VKA= 10V to VREF VKA= 18V to 10V 5 5 4 6 4 IKA=10mA, R1=10K, R2= IKA=10mA, R1=10K,R2= TA=-40 to 85oC VKA=VREF VKA=18V, VREF=0 VKA=VREF, IKA=1 to 100mA f 1.0KHz Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 7 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Electrical Characteristics (Continued) AZ431 R1 VIN IKA VKA VREF Figure 4. Test Circuit 4 for VKA=Vref R3 VIN IKA R1 IREF VKA=VREF(1+R1/R2)+ IREF R1 R2 VREF VKA Figure 5. Test Circuit 5 for VKA>Vref VIN IOFF VKA Figure 6. Test Circuit 6 for IOFF Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 8 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Performance Characteristics AZ431 2.510 1.5 2.505 Reference Voltage (V) Reference Current (A) VKA = VREF IKA = 10mA R1=10K,R2=Infinite IKA=10mA 1.0 2.500 2.495 0.5 2.490 2.485 -60 -40 -20 0 20 40 60 o 80 100 120 140 0.0 -60 -40 -20 0 20 40 60 0 80 100 120 140 Ambient Temperature ( C) Ambient Temperature ( C) Figure 7. Reference Voltage vs. Ambient Temperature Figure 8. Reference Current vs. Ambient Temperature 150 800 Cathode Current (mA) 100 Cathode Current (A) VKA=VREF TA=25 C 0 600 400 200 0 VKA=VREF TA=25 C 0 50 0 -50 -200 -100 -2 -1 0 1 2 3 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 Cathode Voltage (V) Cathode Voltage (V) Figure 9. Cathode Current vs. Cathode Voltage Figure 10. Current vs. Cathode Voltage Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 9 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Performance Characteristics (Continued) AZ431 2.0 1.8 -0.9 Off-State Cathode Current (A) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -40 -20 0 20 40 60 o VREF / VKA (mV/V) AZ431-20V:VKA=18V AZ431-40V:VKA=36V VREF=0 AZ431-20V: VKA=3.5V to 18V AZ431-40V: VKA=3.5V to 36V -1.0 -1.1 -1.2 -1.3 -1.4 80 100 120 -40 -20 0 20 40 60 o 80 100 120 Ambient Temperature ( C) Ambient Temperature ( C) Figure 11. Off-state Cathode Current vs. Ambient Temperature Figure 12. Ratio of Delta Reference Voltage to the Ratio of Delta Cathode Voltage Output 1K 60 10K 100K 1000K 60 15K 10uF I KA 242 50 50 40 Av (dB) TA = 25 C IKA = 10mA o 40 30 30 20 20 8.2K 10 10 0 1K 0 10K 100K 1000K Small Signal Frequency GND Figure 13. Small Signal Voltage Gain vs. Frequency Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 10 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Performance Characteristics (Continued) AZ431 Reference Impedance () IKA=10mA 10 Output 1K IKA 50 TA=25 C o 1 0.1 1K GND 10K 100K 1000K Frequency (Hz) Figure 14. Reference Impedance vs. Frequency 100 90 Cathode Current (mA) 80 70 60 50 40 30 20 10 0 0.01uF 0.1uF 1uF 2uF A: VKA=5V VKA=10V B: VKA=15V: No oscillation R1 (10K) IKA 150 A R2 B Load Capacitance Figure 15. Stability Boundary Conditions vs. Load Capacitance Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 11 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Performance Characteristics (Continued) AZ431 5 Input Input and Output Voltage (V) 4 Output 220 3 2 Output Pulse Generator f=100KHz 50 1 GND 0 0 2 4 6 Time (S) Figure 16. Pulse Response of Input and Output Voltage Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 12 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Application R3 VIN R1 V OUT AZ431 VO=(1+R1/R2) VREF V REF R2 AZ431 Figure 17. Shunt Regulator VIN R1 R4 R2 VREF VOUT VO=(1+R2/R3)*VREF AZ431 R3 Figure 18. High Current Shunt Regulator R2 V IN Iout R1 IOUT = VREF/R2 + IKA AZ431 Figure19. Current Source or Current Limit Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 13 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Application (Continued) AZ431 VIN R1 8.2K AZ1117 Adjust R2 250 AZ431 R3 250 VOUT 5V, 1.5A Figure20. Precision 5V 1.5A Regulator C1 R2 680 R5 R1 3 R3 R4 VOUT U2 C2 Q1 2 AZ431 COMP PWM Controller VFB 4 PS521 Figure 21. PWM Converter with Reference Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 14 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions TO-92 Unit: mm (inch) AZ431 1.100(0.043) 1.400(0.055) 3.430(0.135) MIN 0.360(0.014) 0.510(0.020) 3.300(0.130) 3.700(0.146) 0.000(0.000) 0.380(0.015) 1.600(0.063) MAX 4.400(0.173) 4.700(0.185) 4.300(0.169) 4.700(0.185) 0.380(0.015) 0.550(0.022) 14.100(0.555) 1.270(0.050) TYP 2.440(0.096) 2.640(0.104) Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 15 14.500(0.571) Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions (Continued) SOT-23-3 Unit: mm(inch) AZ431 3.0 0.500(0.020) 0.700(0.028) 4xR0.100(0.004) 0.100(0.004) GAUGE PLANE 7.0 0.900(0.035) 1.100(0.043) R0.100(0.004) 2.0 1.050(0.041)REF 0.0~10.0 0.020(0.001) 0.100(0.004) 0.200(0.008)MIN 2.800(0.110) 3.000(0.118) 0.550(0.022)REF 7.0 0.080(0.003) 0.150(0.006) 2.300(0.091) 2.500(0.098) 1.200(0.047) 1.400(0.055) 0.920(0.036) 0.980(0.039) 0.390(0.015) 0.450(0.018) 1.900(0.075)REF Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 16 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions (Continued) SOT-23-5 Unit: mm(inch) AZ431 2.800(0.110) 3.000(0.118) 0.080(0.003) 0.220(0.009) 2.900(0.114) 2.700(0.106) 1.500(0.059) 1.700(0.067) 0.200(0.008) 0.300(0.012) 4 R0.100(0.004) R0.200(0.008) R0.100(0.004) 0.925(0.036) 0.975(0.038) 5 15 1.450(0.057) 0.950(0.037) 0.300(0.012) 0.500(0.020) 0.010(0.0004) 0.150(0.006) 0.650(0.026) 5 15 1.050(0.041) Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 17 0.300(0.012) 0.600(0.024) 4 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions (Continued) SOT-89 Unit: mm(inch) AZ431 1.630(0.064) 1.830(0.072) 1.400(0.055)* 4.400(0.173) 4.600(0.181) 0.000(0.000) 0.076(0.003) 1.400(0.055) 1.600(0.063) R0.200(0.008) 3.950(0.156) 4.250(0.167) 1.200(0.047) 0.900(0.035) 2.300(0.091) 2.600(0.102) 3 10 0.360(0.014) 0.480(0.019) 3.000(0.118) 0.360(0.014) 0.480(0.019) 0.440(0.017) 0.560(0.022) 0.360(0.014) 0.440(0.017) 3 10 R0.150(0.006) Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 18 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions (Continued) SOIC-8 Unit: mm(inch) AZ431 4.800(0.189) 5.000(0.197) 7 1.350(0.053) 1.750(0.069) 0.320(0.013) 8 7 8 0.675(0.027) 0.725(0.029) D 5.800(0.228) 6.200(0.244) D 20:1 1.270(0.050) TYP 0.100(0.004) 0.300(0.012) R0.150(0.006) 0.800(0.031) 0.200(0.008) 1.000(0.039) 3.800(0.150) 4.000(0.157) 0 8 0.330(0.013) 0.510(0.020) 0.900(0.035) 1 5 R0.150(0.006) 0.190(0.007) 0.250(0.010) Apr. 2005 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 19 http://www.bcdsemi.com BCD Semiconductor Corporation 3170 De La Cruz Blvd, Suite # 105 Santa Clara, CA 95054-2411, U.S.A Tel: +1-408-988 6388, Fax: +1-408-988 6386 Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. 800 Yi Shan Road, Shanghai 200233, PRC Tel: +86-21-6485-1491, Fax: +86-21-5450-0008 Advanced Analog Circuits (Shanghai) Corporation 8F, B Zone, 900 Yi Shan Road, Shanghai 200233, PRC Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 BCD Semiconductor (Taiwan) Company Limited Room 2210, 22nd Fl, 333, Keelung Road, Sec. 1, TaiPei (110), Taiwan Tel: +886-2-2758 6828, Fax: +886-2-2758 6892 IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. |
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