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, SOT-89-3. SOT-89-3 AZ431L · · · · · Graphic Card PC Motherboard Voltage Adapter Switching Power Supply Charger TO-92 Ammo Packing TO-92 SOT-23-5 SOT-23 Figure 1. Package Types of AZ431L Mar. 2007 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 1 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Pin Configuration N Package (SOT-23) Z Package (TO-92 Ammo Packing) Z Package (TO-92) ANODE 3 CATHODE 2 ANODE 1 REF 3 CATHODE 2 ANODE 1 REF K Package (SOT-23-5) NC 1 NC 2 CATHODE 3 5 3 2 REF CATHODE R Package (SOT-89-3) ANODE 1 4 1 2 3 REF 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 Mar. 2007 Rev. 1. 7 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: Bulk Voltage Tolerance A: 0.5% B: 1.0% Package Temperature Range Voltage Tolerance 0.5% TO-92 SOT-23 SOT-23-5 SOT-89-3 -40 to 125oC -40 to 125oC -40 to 125oC -40 to 125oC Package Z: TO-92 N: SOT-23 K: SOT-23-5 R: SOT-89-3 Part Number Tin Lead Lead Free Marking ID Tin Lead Lead Free Packing Type AZ431LAZ AZ431LAZ-E1 AZ431LAZ AZ431LAZ-E1 Bulk 0.5% AZ431LAZTR AZ431LAZTR-E1 AZ431LAZ AZ431LAZ-E1 Ammo 1.0% AZ431LBZ AZ431LBZ-E1 AZ431LBZ AZ431LBZ-E1 Bulk 1.0% AZ431LBZTR AZ431LBZTR-E1 AZ431LBZ AZ431LBZ-E1 0.5% AZ431LANTR-E1 1.0% EA6 AZ431LBNTR-E1 AZ431LAKTR-E1 K41 Ammo Tape & Reel EA7 Tape & Reel E5A Tape & Reel 0.5% AZ431LAKTR 1.0% AZ431LBKTR AZ431LBKTR-E1 K42 E6A Tape & Reel 0.5% AZ431LARTR AZ431LARTR-E1 R41A E41A Tape & Reel 1.0% 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. Mar. 2007 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 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 mW TJ Junction Temperature TSTG Storage Temperature Range oC 150 -65 to 150 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 Symbol Min Max Unit Cathode Voltage VKA VREF 18 V Cathode Current IKA 0.1 100 mA -40 125 Operating Ambient Temperature Range Mar. 2007 Rev. 1. 7 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 Conditions 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 TA=-40 to 125oC 0.1 0.4 µA VKA=VREF 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 IKA=10mA, R1=10KΩ, R2=∞ IKA=10mA, R1=10KΩ, R2=∞ Mar. 2007 Rev. 1. 7 Unit V mV Ω 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 Mar. 2007 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 6 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Typical Performance Characteristics 1.242 0.18 VKA=VREF 1.241 R1=10KΩ R2=Infinite IKA=10mA IKA=10mA Reference Current (µA) Reference Voltage (V) 0.17 1.240 1.239 1.238 1.237 0.15 0.14 0.13 1.236 1.235 -50 0.16 -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 Mar. 2007 Rev. 1. 7 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 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 Mar. 2007 Rev. 1. 7 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 Mar. 2007 Rev. 1. 7 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 VOUT R1 R4 R2 VOUT=(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 Mar. 2007 Rev. 1. 7 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 Mar. 2007 Rev. 1. 7 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) 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 4.700(0.185) 0.380(0.015) 0.550(0.022) 14.100(0.555) 14.500(0.571) 4.300(0.169) 4.400(0.173) 4.700(0.185) 1.270(0.050) TYP 2.440(0.096) 2.640(0.104) Mar. 2007 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 12 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) TO-92 Ammo Packing 12.400(0.488) 13.000(0.512) Unit: mm(inch) ±1.000(0.039) ±1.000(0.039) 4.400(0.173) 4.600(0.181) ΔP Δh 3.400(0.134) 3.600(0.142) 4.400(0.173) 4.600(0.181) 19.000(0.748) 21.000(0.827) 0.380(0.015) 0.550(0.022) 2.200(0.087) 2.800(0.110) 1.000 (0.039) MAX 15.500(0.610) 16.500(0.650) 5.500(0.217) 6.500(0.256) 2.500(0.098) MIN 3.800(0.150) 4.200(0.165) 17.500(0.689) 19.000(0.748) 2.200(0.087) 2.800(0.110) 6.050(0.238) 6.650(0.262) 8.500(0.335) 9.500(0.374) 3.550(0.140) 4.150(0.163) 12.500(0.492) 12.900(0.508) 0.150(0.006) 0.250(0.010) 0.350(0.014) 0.450(0.018) Mar. 2007 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 13 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) SOT-23 Mar. 2007 Rev. 1. 7 Unit: mm(inch) 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) 1.250(0.049) 1.050(0.041) 0.950(0.037) TYP 0.000(0.000) 0.100(0.004) 1.050(0.041) 1.150(0.045) Mar. 2007 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 15 Data Sheet LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ431L Mechanical Dimensions (Continued) SOT-89-3 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) 0.520(0.020) 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) Mar. 2007 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 16 http://www.bcdsemi.com 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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