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 voltage tolerance: 0.5% and 1.0%. 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 0.1mA to 100mA Low Output Noise Wide Operating Range of -40 to 125oC Applications These ICs are available in 4 packages: TO-92 (bulk or ammo packing), SOT-23, SOT-23-5 and SOT-89. SOT-89 AZ431L · · · · · Graphic Card PC Motherboard Voltage Adapter Switching Power Supply Charger TO-92(Bulk Packing) TO-92(Ammo Packing) SOT-23-5 SOT-23 Figure 1. Package Types of AZ431L Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 1 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Pin Configuration Z Package (TO-92(Ammo Packing)) Z Package (TO-92(Bulk Packing)) N Package (SOT-23) ANODE 3 CATHODE 3 CATHODE 2 ANODE 2 ANODE 1 REF 1 REF K Package (SOT-23-5) NC 1 * 2 CATHODE 3 (Note 1) 3 1 2 REF CATHODE R Package (SOT-89) 5 ANODE 4 REF 1 2 3 REF ANODE CATHODE Note 1: * Pin 2 is attached to substrate and must be connected to ANODE or open Figure 2. Pin Configuration of AZ431L (Top View) Functional Block Diagram CATHODE + REF - VREF ANODE Figure 3. Functional Block Diagram of AZ431L Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 2 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Ordering Information AZ431L E1: Lead Free G1: Green Circuit Type TR: Tape and Reel or Ammo Blank: Bulk Voltage Tolerance A: 0.5% B: 1.0% Package TO-92 SOT-23 SOT-23-5 SOT-89 Temperature Range -40 to 125oC -40 to 125oC -40 to 125oC -40 to 125oC Voltage Tolerance Package Z: TO-92 N: SOT-23 K: SOT-23-5 R: SOT-89 Part Number Lead Free Marking ID Green Lead Free Green Packing Type 0.5% AZ431LAZ-E1 AZ431LAZ-G1 AZ431LAZ-E1 AZ431LAZ-G1 Bulk 0.5% AZ431LAZTR-E1 AZ431LAZTR-G1 AZ431LAZ-E1 AZ431LAZ-G1 Ammo 1.0% AZ431LBZ-E1 AZ431LBZ-G1 AZ431LBZ-E1 AZ431LBZ-G1 Bulk 1.0% AZ431LBZTR-E1 AZ431LBZTR-G1 AZ431LBZ-E1 AZ431LBZ-G1 0.5% AZ431LANTR-E1 AZ431LANTR-G1 EA6 GA6 Tape & Reel Ammo 1.0% AZ431LBNTR-E1 AZ431LBNTR-G1 EA7 GA7 Tape & Reel 0.5% AZ431LAKTR-E1 AZ431LAKTR-G1 E5A G5A Tape & Reel 1.0% AZ431LBKTR-E1 AZ431LBKTR-G1 E6A G6A Tape & Reel 0.5% AZ431LARTR-E1 AZ431LARTR-G1 E41A G41A Tape & Reel 1.0% AZ431LBRTR-E1 AZ431LBRTR-G1 E41B G41B Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages. Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 3 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Absolute Maximum Ratings (Note 2) 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 mW TJ Junction Temperature TSTG Storage Temperature Range oC 150 -65 to 150 o C Note 2: 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 Aug. 2011 Rev. 2. 4 o C BCD Semiconductor Manufacturing Limited 4 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Electrical Characteristics (Operating Conditions: TA=25oC, unless otherwise noted.) Test Symbol Circuit Parameter Reference Voltage 0.5% 1.0% Deviation of Reference Voltage Over Full Temperature Range 4 4 VREF Min Typ Max 1.234 1.240 1.246 1.228 1.240 1.252 0oC to 70oC 2 10 -40oC 3 10 4 15 -0.5 -1.5 mV/V 0.15 0.4 µA 0.1 0.4 µA 55 80 µA VREF=0, VKA=18V 0.04 0.10 µA 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 ∆VREF IKA=10mA to 85oC -40oC to 125oC ∆VREF IKA=10mA, ∆VKA ∆VKA:VREF to 16V Ratio of Change in VREF to the Change in Cathode Voltage 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) Dynamic Impedance 4 ZKA Thermal Resistance Conditions θJC IKA=10mA, R1=10KΩ, R2=∞ IKA=10mA, R1=10KΩ, R2=∞ TA=-40 to 125oC VKA=VREF SOT-23 84.84 SOT-23-5 84.84 TO-92 140.80 SOT-89 88.00 Aug. 2011 Rev. 2. 4 Unit V mV Ω oC/W BCD Semiconductor Manufacturing Limited 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 Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 6 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical Performance Characteristics 1.242 IKA=10mA 1.239 1.238 1.237 0.16 0.15 0.14 0.13 1.236 1.235 -50 R1=10KΩ R2=Infinite IKA=10mA 0.17 1.240 Reference Current (µA) Reference Voltage (V) 0.18 VKA=VREF 1.241 -25 0 25 50 75 100 125 0.12 -50 150 -25 0 25 50 75 100 125 o o Ambient Temperature ( C) Ambient Temperature ( C) Figure 7. Reference Voltage vs. Ambient Temperature Figure 8. Reference Current vs. Ambient Temperature 400 150 VKA=VREF 100 VKA=VREF 300 o 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. Cathode Current vs. Cathode Voltage Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 7 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical Performance Characteristics (Continued) Output 70 6.8K 0 TA=25 C 60 360 IKA=10mA 50 Voltage Gain (dB) IKA 10µF 40 30 20 4.3K 10 5V 0 -10 1k 10k 100k GND Small Signal Frequency (Hz) Figure 11. Small Signal Voltage Gain vs. Frequency 10 Dynamic Impedance (Ω) Output 1 100Ω IKA=1mA to 100mA IKA 50Ω 0.1 0.01 1k 10k 100k GND 1M Frequency (Hz) Figure 12. Dynamic Impedance vs. Frequency Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 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 Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 9 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical ApplicationS R3 V OUT VIN R1 VOUT=(1+R1/R2)*VREF V REF AZ431L R2 Figure 15. Shunt Regulator VIN R1 VOUT R4 R2 VOUT=(1+R2/R3)*VREF VREF AZ432 AZ431L R3 Figure 16. High Current Shunt Regulator R2 VIN IOUT IOUT=VREF/R2+IKA R1 AZ431L Figure17. Current Source or Current Limit Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 10 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical Application (Continued) VIN AZ1117 5V/1A R1 8.2K R2 250 AZ431L R3 250 Figure18. Precision 5V 1A 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 Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 11 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions TO-92(Bulk Packing) Unit: mm(inch) 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 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) Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 12 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) TO-92(Ammo Packing) Unit: mm(inch) 1. 100(0. 043) 3. 430(0.135) MIN 1.270(0.050) Typ 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) 12.500(0.492) 0.320(0. 013) 0. 510(0. 020) 3.800(0.150) 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 ) Φ 0.380(0.015) 0.550(0.022 ) 2.540(0.100) Typ Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 13 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) SOT-23 3.0 ° 2.0° 1.050(0.041)REF 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) 0.550(0.022)REF 0.080(0.003) 0.150(0.006) 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) Unit: mm(inch) 0.390(0.015) 0.450(0.018) 1.900(0.075)REF Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 14 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) SOT-23-5 Unit: mm(inch) 0.300(0.012) 0.600(0.024) 1.500(0.059) 1.700(0.067) 0.100(0.004) 0.200(0.008) 2.950(0.116) 2.650(0.104) 2.820(0.111) 3.020(0.119) 0.200(0.008) 0.700(0.028) REF 0.300(0.012) 0.400(0.016) 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) Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 15 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) SOT-89 1.550(0.061)REF Unit: mm(inch) 4.400(0.173) 4.600(0.181) 1.400(0.055) 1.600(0.063) 1.030(0.041)REF 45 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) 1.100(0.043) 0.320(0.013) 0.520(0.020) 0.480(0.019) 0.320(0.013) 0.520(0.020) 10 0.350(0.014) 0.450(0.018) 3.000(0.118) TYP 1.500(0.059) 1.800(0.071) 0.320(0.013)REF 3 2.210(0.087)REF 1.620(0.064)REF R0.150(0.006) 10 Aug. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 16 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein. 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