Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR General Description Features The AZ432 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 1.25V and 18V with two external resistors. · · AZ432 Wide Programmable Precise Output Voltage from 1.25V 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 The AZ432 precision reference is offered in two bandgap tolerance: 0.5% and 1%. Applications These ICs are available in 4 packages: TO-92, SOT23-3, SOT-23-5, SOT-89. SOT-23-5 · · · · · SOT-23-3 Graphic Card PC Motherboard Voltage Adapter Switching Power Supply Charger TO-92 SOT-89 Figure 1. Package Types of AZ432 BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 2 1 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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 3 1 1 NC 1 NC 2 5 ANODE 1 2 REF CATHODE 3 4 2 3 REF REF ANODE CATHODE CATHODE REF Figure 2. Pin Configuration of AZ432 (Top View) Functional Block Diagram CATHODE + REF - VREF ANODE Figure 3. Functional Block Diagram of AZ432 BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 2 2 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Ordering Information AZ432 E1: Lead Free Circuit Type Blank: Tin Lead TR: Tape and Reel or Ammo Blank: Tube or Bulk Package Bandage Tolerance A: 0.5% B: 1% Package TO-92 Temperature Range -40 to 125oC SOT-23-3 -40 to 125oC SOT-23-5 -40 to 125oC SOT-89 -40 to 125oC Voltage Tolerance 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 0.50% AZ432AZ AZ432AZ-E1 AZ432AZ AZ432AZ-E1 Bulk 0.50% AZ432AZTR AZ432AZTR-E1 AZ432AZ AZ432AZ-E1 Ammo 1% AZ432BZ AZ432BZ-E1 AZ432BZ AZ432BZ-E1 Bulk 1% AZ432BZTR AZ432BZTR-E1 AZ432BZ AZ432BZ-E1 Ammo 0.50% AZ432ANTR AZ432ANTR-E1 N48 EA8 Tape & Reel 1% AZ432BNTR AZ432BNTR-E1 N49 EA9 Tape & Reel 0.50% AZ432AKTR AZ432AKTR-E1 K43 E7A Tape & Reel 1% AZ432BKTR AZ432BKTR-E1 K44 E8A Tape & Reel 0.50% AZ432ARTR AZ432ARTR-E1 R42A E42A Tape & Reel 1% AZ432BRTR AZ432BRTR-E1 R42B E42B 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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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 oC -65 to 150 QJA Package Thermal Impedance mW 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 Operation Ratings Parameter Symbol Min Max Unit Cathode Voltage VKA VREF 18 V Cathode Current IKA 0.1 100 mA -40 125 oC Operating Ambient Temperature Range BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 2 4 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Electrical Characteristics (Typical and limits apply for TJ=25oC unless otherwise noted.) Parameter Reference Voltage 0.5% 1% Deviation of Reference Voltage Over-Temperature Test Circuit Symbol 4 VREF 4 ∆VREF VKA=VREF IKA=10mA Ratio of Change in VREF to the Change in Cathode Voltage 5 ∆VREF ∆VKA 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 Conditions Min Typ Max 1.244 1.250 1.256 1.238 1.250 1.262 0 to 70oC 2 10 -40 to 85oC 3 10 IKA=10mA, ∆VKA: VREF to 16V -0.5 -1.5 mV/V IKA=10mA, R1=10KΩ, R2=∞ 0.15 0.4 µA TA=-40 to 85oC 0.1 0.4 µA VKA=VREF 55 80 µA VREF=0, VKA=18V 0.04 0.10 VKA=6V, VREF=0 0.01 0.05 VKA=VREF, IKA=1 to 100mA f≤1.0kHz 0.05 0.15 VKA=VREF, IKA=10mA IKA=10mA, R1=10KΩ, R2=∞ Unit V mV µA Ω BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 2 5 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Typical Performance Characteristics 1.253 0.18 VKA=VREF IKA=10mA Reference Current (µA) Reference Voltage (V) 1.252 1.251 1.250 1.249 1.248 1.247 -50 R2=∞ IKA=10mA R1=10KΩ 0.17 0.16 0.15 0.14 0.13 -25 0 25 50 75 100 125 0.12 -50 150 -25 o 0 25 50 75 100 o Ambient Temperature ( C) Ambient Temperature ( C) Figure 8. Reference Current vs. Ambient Temperature Figure 7. Reference Voltage 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 Cathode Voltage (V) -0.5 0.0 0.5 1.0 1.5 Cathode Voltage (V) Figure 10. Current vs. cathode Voltage Figure 9. Cathode Current vs. Cathode Voltage BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 2 7 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Typical Performance Characteristics (Continued) Output 6.8K 60 Voltage Gain (dB) 360 IKA=10mA 50 I KA 10µF o TA=25 C 40 30 4.3K 20 10 0 100 1k 10k 100k GND 500K Small Signal Frequency (HZ) Figure 11. Small Signal Voltage Gain vs. Frequency 10 Impedance (Ω) Output 100Ω 1 IKA 50Ω 0.1 0.01 1k 10k 100k GND 1M Frequency (Hz) Figure 12. Dynamic Impedance vs. Frequency BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 2 8 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Typical Performance Characteristics (Continued) Input and output voltage (V) 3 Input Output 2 R1 1.8KΩ 1 Pulse Generator f=100KHz Output R2 50Ω GND 0 -1 0 1 2 3 4 5 6 Time (µS) Figure 13. Pulse Response of Input and Output Voltage -0.3 Ratio of ∆VREF to ∆VKA (mV/V) IKA=10mA ∆VKA=VREF to 16V. -0.4 -0.5 -40 0 40 80 120 o Ambient Temperature ( C) Figure 14. Ratio of Delta Reference Voltage to the Ratio of Delta Cathode Voltage vs. Ambient Temperature BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 2 9 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Typical ApplicationS R3 V OUT VIN R1 VO=(1+R1/R2) VREF V REF AZ432 R2 Figure 15: Shunt Regulator VIN VOUT R1 R4 R2 VO=(1+R2/R3) VREF VREF AZ432 R3 Figure 16: High Current Shunt Regulator R2 VIN IOUT R1 IOUT = VREF/R2 + IKA AZ432 Figure17: Current Source or Current Limit BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 1. 2 10 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Typical Application (Continued) VIN AZ1117 2.5V/1A R1 8.2K R2 250 AZ432 R3 250 Figure18: Precision 2.5V/1A Regulator R3 C1 R4 VOUT R2 680 R5 R1 Q1 3 COMP C2 U2 2 AZ432 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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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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