Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS General Description Features 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. SOIC-8 · · · · AZ431 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: 0.2Ω 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 SOT-89 TO-92 SOT-23-5 SOT-23-3 Figure 1. Package Types of AZ431 BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 1 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Pin Configuration R Package (SOT-89) N Package (SOT-23-3) M Package (SOIC-8) ANODE CATHODE 1 8 REF ANODE 2 7 ANODE ANODE 3 6 ANODE NC 4 5 NC 3 1 2 1 REF CATHODE REF 2 3 ANODE CATHODE K Package (SOT-23-5) Z Package (TO-92) 3 CATHODE NC 1 2 ANODE NC 2 1 REF CATHODE 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 BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 2 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Ordering Information AZ431 E1: Lead-Free Circuit Type Blank: Tin Lead TR: Tape and Reel or Ammo Bandage Tolerance A: 0.4% B: 0.8% Blank: Tube or Bulk A: AZ431(40V) B: AZ431(20V) Package M: SOIC-8 N: SOT-23-3 R: SOT-89 Z: TO-92 K: SOT-23-5 40V Products Package Temperature Range SOT-23-3 -40 to 125oC o SOT-23-5 TO-92 -40 to 125 C -40 to 125oC o SOIC-8 SOT-89 -40 to 125 C -40 to 125oC Voltage Tolerance 0.4% Part Number Tin Lead Lead Free Marking ID Tin Lead Lead Free Packing Type AZ431AN-ATR AZ431AN-ATRE1 N41 EA1 Tape & Reel 0.8% AZ431BN-ATR AZ431BN-ATRE1 N42 EA2 Tape & Reel 0.4% AZ431AK-ATR AZ431AK-ATRE1 K3A E3A Tape & Reel 0.8% AZ431BK-ATR AZ431BK-ATRE1 K3B E3B Tape & Reel 0.4% AZ431AZ-A AZ431AZ-AE1 AZ431AZ-A AZ431AZ-AE1 Bulk 0.4% AZ431AZ-ATR AZ431AZ-ATRE1 AZ431AZ-A AZ431AZ-AE1 Ammo 0.8% AZ431BZ-A AZ431BZ-AE1 AZ431BZ-A AZ431BZ-AE1 Bulk 0.8% AZ431BZ-ATR AZ431BZ-ATRE1 AZ431BZ-A AZ431BZ-AE1 Ammo 0.4% AZ431AM-A AZ431AM-AE1 AZ431AM-A AZ431AM-AE1 Tube 0.4% AZ431AM-ATR AZ431AM-ATRE1 AZ431AM-A AZ431AM-AE1 Tape & Reel 0.8% AZ431BM-A AZ431BM-AE1 AZ431BM-A AZ431BM-AE1 Tube 0.8% AZ431BM-ATR AZ431BM-ATRE1 AZ431BM-A AZ431BM-AE1 Tape & Reel 0.4% AZ431AR-ATR AZ431AR-ATRE1 431A E43A Tape & Reel 0.8% AZ431BR-ATR AZ431BR-ATRE1 431B E43B Tape & Reel BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 3 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Ordering Information (Continued) 20V Products Package Temperature Range SOT-23-3 -40 to 125oC o SOT-23-5 TO-92 SOIC-8 SOT-89 -40 to 125 C -40 to 125oC -40 to 125oC -40 to 125oC Part Number Marking ID Packing Type Voltage Tolerance Tin Lead Lead Free 0.4% AZ431AN-BTR AZ431AN-BTRE1 N44 EA4 Tape & Reel 0.8% AZ431BN-BTR AZ431BN-BTRE1 N45 EA5 Tape & Reel 0.4% AZ431AK-BTR AZ431AK-BTRE1 K4A E4A Tape & Reel 0.8% AZ431BK-BTR AZ431BK-BTRE1 K4B E4B Tape & Reel 0.4% AZ431AZ-B AZ431AZ-BE1 AZ431AZ-B AZ431AZ-BE1 Bulk Tin Lead Lead Free 0.4% AZ431AZ-BTR AZ431AZ-BTRE1 AZ431AZ-B AZ431AZ-BE1 Ammo 0.8% AZ431BZ-B AZ431BZ-BE1 AZ431BZ-B AZ431BZ-BE1 Bulk 0.8% AZ431BZ-BTR AZ431BZ-BTRE1 AZ431BZ-B AZ431BZ-BE1 Ammo 0.4% AZ431AM-B AZ431AM-BE1 AZ431AM-B AZ431AM-BE1 Tube 0.4% AZ431AM-BTR AZ431AM-BTRE1 AZ431AM-B AZ431AM-BE1 Tape & Reel 0.8% AZ431BM-B AZ431BM-BE1 AZ431BM-B AZ431BM-BE1 Tube 0.8% AZ431BM-BTR AZ431BM-BTRE1 AZ431BM-B AZ431BM-BE1 Tape & Reel 0.4% AZ431AR-BTR AZ431AR-BTRE1 431C E43C Tape & Reel 0.8% AZ431BR-BTR AZ431BR-BTRE1 431D E43D Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 4 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit AZ431 (40V): 40 VKA Cathode Voltage V AZ431 (20V): 20 Cathode Current Range (Continuous) IKA -100 to +150 mA Reference Input Current Range IREF 10 mA M,Z,R Package: 770 PD Power Dissipation TJ Junction Temperature TSTG Storage Temperature Range mW N,K Package: 370 160 oC -65 to +150 oC M Package: 150 N Package: 330 θJA Package Thermal Impedance Z Package: 150 oC/W R Package: 50 K Package: 250 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 Symbol Min Max AZ431(40V): 36 Unit Cathode Voltage VKA VREF Cathode Current IKA 1.0 100 mA -40 125 oC Operating Ambient Temperature Range AZ431(20V): 18 V BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 5 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Electrical Characteristics for AZ431(40V) Operating Conditions: TA=25oC unless otherwise specified. Parameter Reference Voltage 0.4% 0.8% Deviation of Reference Voltage Over-Temperature Test Circuit Symbol 4 VREF 4 ∆VREF Conditions AZ431 (40V) 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 ∆ VKA= 10V to VREF -1.0 -2.7 ∆VKA= 36V to 10V -0.5 -2.0 0.7 4 R2=∞, TA=-40 to 85oC 0.4 1.2 VKA=VREF, IKA=10mA VKA=VREF IKA= 10mA 5 Reference Current 5 IREF Deviation of Reference Current Over Full Temperature Range 5 ∆IREF Minimum Cathode Current for Regulation 4 IKA (MIN) VKA=VREF 0.4 1.0 Off-State Cathode Current 6 IKA (OFF) VKA=36 V, VREF=0 0.05 1.0 Dynamic Impedance 4 ZKA VKA=VREF, IKA=1 to 100mA, f ≤ 1.0KHz 0.15 0.5 IKA=10mA IKA=10mA,R1=10KΩ, R2=∞ IKA=10mA, R1=10KΩ V mV Ratio of Change in Reference Voltage to the Change in Cathode Voltage ∆VREF ∆VKA Unit mV/V µA µA mA µA Ω BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 6 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Electrical Characteristics for AZ431(20V) Operating Conditions: TA=25oC unless otherwise specified. Parameter Reference Voltage 0.4% 0.8% Deviation of Reference Voltage Over-Temperature Test Circuit Symbol 4 VREF 4 ∆VREF AZ431 (20V) Conditions VKA=VREF, IKA=10mA 0 to 70oC Min Typ Max 2.490 2.500 2.510 2.480 2.500 2.520 V 4.5 8 4.5 10 ∆ VKA= 10V to VREF -1.0 -2.7 ∆VKA= 18V to 10V -0.5 -2.0 0.7 4 µA TA=-40 to 85oC 0.4 1.2 µA mA VKA=VREF IKA=10mA -40 to 85 oC mV Ratio of Change in Reference Voltage to the Change in Cathode Voltage 5 Reference Current 5 IREF Deviation of Reference Current Over Full Temperature Range 5 ∆IREF Minimum Cathode Current for Regulation 4 IKA (MIN) VKA=VREF 0.4 1.0 Off-State Cathode Current 6 IKA (OFF) VKA=18V, VREF=0 0.05 1.0 Dynamic Impedance 4 ZKA VKA=VREF, IKA=1 to 100mA f ≤ 1.0KHz 0.2 0.5 ∆VREF ∆VKA Unit IKA=10mA IKA=10mA, R1=10KΩ, R2=∞ IKA=10mA, R1=10KΩ,R2=∞ mV/V µA Ω BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 7 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Electrical Characteristics (Continued) R1 VKA VIN IKA VREF Figure 4. Test Circuit 4 for VKA=Vref R3 VIN VKA IKA R1 IREF VKA=VREF(1+R1/R2)+ IREF R1 R2 VREF Figure 5. Test Circuit 5 for VKA>Vref VKA VIN IOFF Figure 6. Test Circuit 6 for IOFF BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 8 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Typical Performance Characteristics 1.5 2.510 Reference Voltage (V) Reference Current (µA) VKA = VREF IKA = 10mA 2.505 2.500 2.495 R1=10K,R2=Infinite IKA=10mA 1.0 0.5 2.490 2.485 -60 -40 -20 0 20 40 60 80 100 120 0.0 -60 140 -40 o 0 20 40 60 80 100 120 140 Ambient Temperature ( C) Figure 7. Reference Voltage vs. Ambient Temperature Figure 8. Reference Current vs. Ambient Temperature 800 150 VKA=VREF 100 Cathode Current (µA) Cathode Current (mA) -20 0 Ambient Temperature ( C) 0 TA=25 C 50 0 VKA=VREF 600 0 TA=25 C 400 200 0 -50 -200 -100 -2 -1 0 1 2 -1.0 3 -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 BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 9 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Typical Performance Characteristics (Continued) 2.0 AZ431-20V: VKA=3.5V to 18V AZ431-40V: VKA=3.5V to 36V -0.9 1.6 AZ431-20V:VKA=18V AZ431-40V:VKA=36V VREF=0 1.4 1.2 ∆VREF / ∆VKA (mV/V) Off-State Cathode Current (µA) 1.8 1.0 0.8 0.6 0.4 -1.0 -1.1 -1.2 -1.3 0.2 0.0 -1.4 -40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120 o o 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 I KA 242 50 50 o TA = 25 C IKA = 10mA Av (dB) 40 40 30 30 20 20 10 10 0 1K 10uF 8.2K GND 0 10K 100K 1000K Small Signal Frequency Figure 13. Small Signal Voltage Gain vs. Frequency BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 10 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Reference Impedance (Ω) Typical Performance Characteristics (Continued) IKA=10mA Output o TA=25 C 10 1K IKA 50 1 0.1 1K GND 10K 100K 1000K Frequency (Hz) Figure 14. Reference Impedance vs. Frequency 100 Cathode Current (mA) 90 80 70 A: VKA=5V VKA=10V B: VKA=15V: No oscillation 150 R1 (10K) IKA 60 50 40 30 A R2 20 10 B 0 0.01uF 0.1uF 1uF 2uF Load Capacitance Figure 15. Stability Boundary Conditions vs. Load Capacitance BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 11 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Typical Performance Characteristics (Continued) 5 Input and Output Voltage (V) Input Output 4 220 Pulse Generator f=100KHz 3 Output 2 50 1 GND 0 0 2 4 6 Time (µS) Figure 16. Pulse Response of Input and Output Voltage BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 12 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Typical Application R3 V OUT VIN R1 VO=(1+R1/R2) VREF V REF AZ431 R2 Figure 17. Shunt Regulator VIN VOUT R1 R4 VO=(1+R2/R3)*VREF R2 VREF AZ431 R3 Figure 18. High Current Shunt Regulator R2 V IN Iout IOUT = VREF/R2 + IKA R1 AZ431 Figure19. Current Source or Current Limit BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 13 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Typical Application (Continued) VIN AZ1117 R1 8.2K VOUT Adjust 5V, 1.5A R2 250 AZ431 R3 250 Figure20. Precision 5V 1.5A Regulator R3 C1 R4 VOUT R2 680 R5 R1 U2 Q1 3 COMP C2 2 AZ431 PWM Controller VFB 4 PS521 Figure 21. PWM Converter with Reference BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 14 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Mechanical Dimensions TO-92 Unit: mm (inch) 1.100(0.043) 3.430(0.135) MIN 3.700(0.146) 3.300(0.130) 1.400(0.055) 0.360(0.014) 0.510(0.020) 0.000(0.000) 0.380(0.015) Φ1.600(0.063) MAX 4.400(0.173) 4.700(0.185) 1.270(0.050) TYP 14.500(0.571) 0.380(0.015) 0.550(0.022) 14.100(0.555) 4.300(0.169) 4.700(0.185) 2.440(0.096) 2.640(0.104) BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 15 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Mechanical Dimensions (Continued) SOT-23-3 3.0 ° 7.0° R0.100(0.004) 0.900(0.035) 1.100(0.043) 7.0° 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) 0.080(0.003) 0.150(0.006) 0.550(0.022)REF 1.200(0.047) 1.400(0.055) 2.300(0.091) 2.500(0.098) 0.920(0.036) 0.980(0.039) 0.100(0.004) GAUGE PLANE 4×R0.100(0.004) 0.500(0.020) 0.700(0.028) 2.0° 1.050(0.041)REF Unit: mm(inch) 0.390(0.015) 0.450(0.018) 1.900(0.075)REF BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 16 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Mechanical Dimensions (Continued) SOT-23-5 Unit: mm(inch) 1.500(0.059) 1.700(0.067) 0.300(0.012) 0.600(0.024) 0.080(0.003) 0.220(0.009) 2.900(0.114) 2.700(0.106) 2.800(0.110) 3.000(0.118) 0.200(0.008) 0.300(0.012) 4° 4° 0.925(0.036) 0.975(0.038) R0.100(0.004) R0.200(0.008) R0.100(0.004) 0.300(0.012) 0.500(0.020) 1.450(0.057) 0.950(0.037) 5° 15° 0.010(0.0004) 0.150(0.006) 0.650(0.026) 5° 15° 1.050(0.041) BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 17 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Mechanical Dimensions (Continued) SOT-89 Unit: mm(inch) 4.400(0.173) 4.600(0.181) 1.630(0.064) 1.400(0.055) 1.600(0.063) 1.830(0.072) 0.000(0.000) 0.076(0.003) 1.400(0.055)* 1.200(0.047) 0.900(0.035) 3.950(0.156) 4.250(0.167) R0.200(0.008) 2.300(0.091) 2.600(0.102) 3° 10° 0.360(0.014) 0.360(0.014) 0.360(0.014) 0.480(0.019) 0.480(0.019) 0.440(0.017) 0.440(0.017) 3.000(0.118) 0.560(0.022) 3° 10° R0.150(0.006) BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 18 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431 Mechanical Dimensions (Continued) SOIC-8 Unit: mm(inch) 4.800(0.189) 5.000(0.197) 7° 0.320(0.013) 1.350(0.053) 1.750(0.069) 8° 8° 7° 0.675(0.027) 0.725(0.029) D 5.800(0.228) 1.270(0.050) 6.200(0.244) TYP D 20:1 0.300(0.012) R0.150(0.006) 0.100(0.004) φ 0.800(0.031) 0.200(0.008) 0° 8° 1.000(0.039) 3.800(0.150) 4.000(0.157) 1° 5° 0.330(0.013) 0.510(0.020) 0.900(0.035) R0.150(0.006) 0.190(0.007) 0.250(0.010) BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 7 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. 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