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 0.1mA to 100 mA Low Output Noise Wide Operating Range of -40 to 125oC The AZ432 precision reference is offered in two voltage tolerance: 0.5% and 1.0%. Applications These ICs are available in 4 packages: TO-92 (bulk or ammo packing), SOT-23, SOT-23-5, SOT-89-3. TO-92 · · · · · Graphic Card PC Motherboard Voltage Adapter Switching Power Supply Charger SOT-89-3 TO-92 Ammo Packing SOT-23 SOT-23-5 Figure 1. Package Types of AZ432 Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 1 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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 3 1 REF 1 NC 2 CATHODE 3 5 ANODE 1 4 CATHODE R Package (SOT-89-3) K Package (SOT-23-5) NC 2 2 3 REF REF ANODE CATHODE Figure 2. Pin Configuration of AZ432 (Top View) Functional Block Diagram CATHODE + REF - VREF ANODE Figure 3. Functional Block Diagram of AZ432 Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 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: 1.0% Package TO-92 Temperature Range -40 to 125oC SOT-23 -40 to 125oC SOT-23-5 -40 to 125oC SOT-89-3 -40 to 125oC Voltage Tolerance 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 0.5% AZ432AZ AZ432AZ-E1 AZ432AZ AZ432AZ-E1 Bulk 0.5% AZ432AZTR AZ432AZTR-E1 AZ432AZ AZ432AZ-E1 Ammo 1.0% AZ432BZ AZ432BZ-E1 AZ432BZ AZ432BZ-E1 Bulk 1.0% AZ432BZTR AZ432BZTR-E1 AZ432BZ AZ432BZ-E1 Ammo 0.5% AZ432ANTR-E1 EA8 Tape & Reel 1.0% AZ432BNTR-E1 EA9 Tape & Reel 0.5% AZ432AKTR AZ432AKTR-E1 K43 E7A Tape & Reel 1.0% AZ432BKTR AZ432BKTR-E1 K44 E8A Tape & Reel 0.5% AZ432ARTR AZ432ARTR-E1 R42A E42A Tape & Reel 1.0% 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. Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 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 Z, R Package 770 N, K Package 370 PD Power Dissipation mW TJ Junction Temperature TSTG Storage Temperature Range oC 150 oC -65 to 150 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 Operating Ambient Temperature Range Mar. 2007 Rev. 1. 6 o C BCD Semiconductor Manufacturing Limited 4 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Electrical Characteristics (Typical and limits apply for TA=25oC, unless otherwise noted.) Parameter Reference Voltage 0.5% 1.0% Test Circuit Symbol 4 VREF VKA=VREF, IKA=10mA ∆VREF VKA=VREF IKA=10mA Conditions Min 4 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 Unit 1.244 1.250 1.256 1.250 1.262 2 10 3 10 4 15 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 125oC 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 -40 to 85oC -40 to 125 Ratio of Change in VREF to the Change in Cathode Voltage Max 1.238 0 to 70oC Deviation of Reference Voltage Over Full Temperature Range Typ oC IKA=10mA, R1=10KΩ, R2=∞ Mar. 2007 Rev. 1. 6 V mV µA Ω BCD Semiconductor Manufacturing Limited 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 Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 6 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Typical Performance Characteristics 1.253 0.18 0.17 Reference Current (µA) Reference Voltage (V) IKA=10mA 1.251 1.250 1.249 1.248 1.247 -50 R1=10KΩ R2=Infinite IKA=10mA VKA=VREF 1.252 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 7. Reference Voltage vs. Ambient Temperature Figure 8. Reference Current vs. Ambient Temperature 400 150 VKA=VREF VKA=VREF 300 o TA=25 C o TA=25 C Cathode Current (µA) Cathode Current (mA) 100 50 0 -50 200 100 0 -100 -200 -100 -300 -150 -1 0 -1.0 1 -0.5 0.0 0.5 1.0 1.5 Cathode Voltage (V) Cathode Voltage (V) Figure 10. Cathode Current vs. Cathode Voltage Figure 9. Cathode Current vs. Cathode Voltage Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 7 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Typical Performance Characteristics (Continued) Output 70 0 6.8K TA=25 C 60 I KA IKA=10mA 360 Voltage Gain (dB) 50 10µF 40 30 20 4.3K 10 0 -10 1k 10k 100k GND Small Signal Frequency (Hz) Figure 11. Small Signal Voltage Gain vs. Frequency 10 Output 100Ω Impedance (Ω) IKA 1 50Ω 0.1 GND 0.01 1k 10k 100k 1M Frequency (Hz) Figure 12. Dynamic Impedance vs. Frequency Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 8 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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 -0.3 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 Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 9 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Typical ApplicationS R3 V OUT VIN R1 VOUT=(1+R1/R2)*VREF V REF AZ432 R2 Figure 15. Shunt Regulator VIN VOUT R1 R4 R2 VOUT=(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 Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 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 Mar. 2007 Rev. 1. 6 BCD Semiconductor Manufacturing Limited 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 4.700(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. 6 BCD Semiconductor Manufacturing Limited 12 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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. 6 BCD Semiconductor Manufacturing Limited 13 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 Mechanical Dimensions (Continued) SOT-23 Mar. 2007 Rev. 1. 6 Unit: mm(inch) BCD Semiconductor Manufacturing Limited 14 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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. 6 BCD Semiconductor Manufacturing Limited 15 Data Sheet LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR AZ432 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. 6 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. 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. MAIN SITE BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 - IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 30920 Huntwood Ave. Hayward, CA 94544, U.S.A Tel : +1-510-324-2988 Fax: +1-510-324-2788