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| Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L General Description The AZ431L series ICs are low voltage three-terminal adjustable 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, motherboard and other adjustable regulators. The output voltage can be set to any value between 1.24V and 18V with two external resistors. The AZ431L precision reference is offered in two bandgap tolerance: 0.5% and 1%. These ICs are available in 4 packages: TO-92, SOT23-3, SOT-23-5, SOT-89. Features * * * * * * * * Wide Programmable Precise Output Voltage from 1.24V to 18V High Stability under Capacitive Load Low Temperature Deviation: 3mV Typical Low Equivalent Full-Range Temperature Coefficient: 20PPM/oC Typical Low Dynamic Output Resistance: 0.05 Typical High Sink Current Capacity from 55A to 100 mA Low Output Noise Wide Operating Range of -40 to 125oC Applications * * * * * Graphic Card PC Motherboard Voltage Adapter Switching Power Supply Charger SOT-23-5 SOT-23-3 TO-92 SOT-89 Figure 1. Package Types of AZ431L Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 1 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Pin Configuration N Package (SOT-23-3) ANODE Z Package (TO-92) K Package (SOT-23-5) R Package (SOT-89) 3 2 1 CATHODE 3 ANODE 1 REF CATHODE REF CATHODE 3 4 REF REF ANODE CATHODE 2 NC 2 1 2 3 NC 1 5 ANODE Figure 2. Pin Configuration of AZ431L (Top View) Functional Block Diagram CATHODE REF + - VREF ANODE Figure 3. Functional Block Diagram of AZ431L Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 2 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Ordering Information AZ431L E1: Lead Free Blank: Tin Lead Circuit Type TR: Tape and Reel or Ammo Blank: Tube or Bulk Bandage Tolerance A: 0.5% B: 1% Package Z: TO-92 N: SOT-23-3 K: SOT-23-5 R: SOT-89 Package Temperature Range Voltage Tolerance 0.50% Part Number Tin Lead AZ431LAZ AZ431LAZTR AZ431LBZ AZ431LBZTR AZ431LANTR AZ431LBNTR AZ431LAKTR AZ431LBKTR AZ431LARTR AZ431LBRTR Lead Free AZ431LAZ-E1 AZ431LAZTR-E1 AZ431LBZ-E1 AZ431LBZTR-E1 AZ431LANTR-E1 AZ431LBNTR-E1 AZ431LAKTR-E1 AZ431LBKTR-E1 AZ431LARTR-E1 AZ431LBRTR-E1 Marking ID Tin Lead AZ431LAZ AZ431LAZ AZ431LBZ AZ431LBZ N46 N47 K41 K42 R41A R41B Lead Free AZ431LAZ-E1 AZ431LAZ-E1 AZ431LBZ-E1 AZ431LBZ-E1 EA6 EA7 E5A E6A E41A E41B Packing Type Bulk Ammo Bulk Ammo Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel TO-92 -40 to 125oC 0.50% 1% 1% SOT-23-3 -40 to 125oC -40 to 125oC -40 to 125oC 0.50% 1% 0.50% 1% 0.50% 1% SOT-23-5 SOT-89 BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 3 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Absolute Maximum Ratings (Note 1) Parameter Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation Storage Temperature Range Symbol VKA IKA IREF PD TSTG Value 20 -100 to 100 10 Z,R Package N,K Package -65 to 150 TO-92 Package Thermal Impedance QJA SOT-23-3 SOT-23-5 SOT-89 130 330 250 100 oC/W Unit V mA mA 770 370 mW oC 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 0.1 -40 Max 18 100 125 Unit V mA o C Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 4 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Electrical Characteristics (Typical and limits apply for TJ=25oC unless otherwise noted.) Parameter Reference Voltage 0.5% 1% Test Symbol Circuit 4 4 VREF VREF Conditions VKA=VREF, IKA=10mA VKA=VREF IKA=10mA 0oC to 70oC -40 oC Min 1.234 1.228 Typ 1.240 1.240 2 3 -0.5 Max 1.246 1.252 10 Unit V Deviation of Reference Voltage Over-Temperature Ratio of Change in VREF to the Change in Cathode Voltage Reference Input Current Deviation of Reference Current Over Full Temperature Range Minimum Cathode Current for Regulation Off-State Cathode Current Dynamic Impedance to 85oC mV 10 -1.5 mV/V A A A A 5 VREF IKA=10mA, VKA VKA:VREF to 16V IREF IREF IKA (MIN) IKA (OFF) ZKA IKA=10mA, R1=10K, R2= IKA=10mA, R1=10K, R2= TA=-40 to 85oC VKA=VREF VREF=0, VKA=18V VKA=6, VREF=0 VKA=VREF, IKA=1 to 100mA f 1.0kHz 5 0.15 0.4 5 4 6 4 0.1 55 0.04 0.01 0.05 0.4 80 0.10 0.05 0.15 Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 5 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Electrical Characteristics (Continued) 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. 2 BCD Semiconductor Manufacturing Limited 6 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical Performance Characteristics 1.242 1.241 VKA=VREF IKA=10mA 0.18 R2= Reference Current (A) 0.17 IKA=10mA R1=10K Reference Voltage (V) 1.240 0.16 1.239 0.15 1.238 0.14 1.237 1.236 0.13 1.235 -50 -25 0 25 50 75 o 100 125 150 0.12 -50 -25 0 25 50 o 75 100 125 Ambient Temperature ( C) Ambient Temperature ( C) Figure 7. Reference Voltage vs. Ambient Temperature Figure 8. Reference Current vs. Ambient Temperature 150 400 VKA=VREF 100 TA=25 C 200 o 300 VKA=VREF TA=25 C o Cathode Current (mA) 50 Cathode Current (A) 100 0 -100 -200 -300 0 -50 -100 -150 -1 0 1 -1 0 1 Cathode Voltage (V) Cathode Voltage (V) Figure 9. Cathode Current vs. Cathode Voltage Figure 10. Current vs. Cathode Voltage Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 7 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical Performance Characteristics (Continued) Output 60 6.8K IKA=10mA TA=25 C o I KA 360 50 Voltage Gain (dB) 10uF 40 30 20 4.3K 5V 10 0 100 1k 10k 100k 500K GND Small Signal Frequency (HZ) Figure 11. Small Signal Voltage Gain vs. Frequency 10 Output 100 Impedance () 1 IKA = 1mA to 100mA IKA 50 0.1 0.01 1k GND 10k 100k 1M Frequency (Hz) Figure 12. Dynamic Impedance vs. Frequency Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 8 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical Performance Characteristics (Continued) 3 Input and output voltage (V) Input Output R1 1.8K Pulse Generator f=100KHz R2 50 2 1 Output GND 0 -1 0 1 2 3 4 5 6 Time (S) Figure 13. Pulse Response of Input and Output Voltage -0.30 -0.35 IKA=10mA VKA=VREF to 16V. Ratio of VREF to VKA (mV/V) -0.40 -0.45 -0.50 -0.55 -40 -20 0 20 40 60 o 80 100 120 Ambient Temperature ( C) Figure 14. Ratio of Delta Reference Voltage to the Ratio of Cathode Voltage vs. Ambient Temperature Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 9 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical ApplicationS R3 VIN R1 V OUT VO=(1+R1/R2) VREF V REF R2 AZ431L Figure 15. Shunt Regulator VIN R1 R4 R2 VOUT VO=(1+R2/R3) VREF VREF AZ431L AZ432 R3 Figure 16. High Current Shunt Regulator R2 VIN IOUT R1 IOUT = VREF/R2 + IKA AZ431L Figure17. Current Source or Current Limit Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 10 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical Application (Continued) VIN R1 8.2K AZ1117 R2 250 AZ431L R3 250 2.5V/1A Figure18. Precision 5-V 1.5A Regulator C1 R2 680 R5 R1 3 R3 R4 VOUT U2 C2 Q1 2 AZ431L COMP PWM Controller VFB 4 PS521 Figure 19. PWM Converter with Reference Apr. 2005 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 11 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions TO-92 Unit: mm (inch) 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. 2 BCD Semiconductor Manufacturing Limited 12 14.500(0.571) Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) SOT-23-3 Unit: mm(inch) 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. 2 BCD Semiconductor Manufacturing Limited 13 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) SOT-23-5 Unit: mm(inch) 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. 2 BCD Semiconductor Manufacturing Limited 14 0.300(0.012) 0.600(0.024) 4 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) SOT-89 Unit: mm(inch) 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. 2 BCD Semiconductor Manufacturing Limited 15 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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