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