 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS General Description The AS431 series ICs are three-terminal adjustable shunt 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 and other adjustable regulators. The output voltage of these ICs can be set to any value between VREF (2.5V) and the maximum cathode voltage (36V). The AS431 precision reference is offered in two bandgap tolerance: 0.4% and 0.8%. These ICs are available in 4 Packages: TO-92, SOT-233, SOT-23-5 and SOT-89 . AS431 Features * * * * * * * * * Programmable Precise Output Voltage from 2.5V to 36V Very Accurate Reference Voltage: 0.15% Typical High Stability under Capacitive Load Low Temperature Deviation: 4.5mV Typical Low Equivalent Full-range Temperature Coefficient with 20PPM/oC Typical Low Dynamic Output Resistance: 0.15 Typical Sink Current Capacity from 1mA to 100 mA Low Output Noise Wide Operating Range of -40 to 125oC Applications * * * * * Charger Voltage Adapter Switching Power Supply Graphic Card Precision Voltage Reference SOT-89 TO-92 SOT-23-3 SOT-23-5 Figure 1. Package Types of AS431 Nov. 2005 Rev. 1. 1 1 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Pin Configuration N Package (SOT-23-3) ANODE AS431 R Package (SOT-89) 3 1 2 1 2 3 REF CATHODE REF ANODE CATHODE Z Package (TO-92) K Package (SOT-23-5) 3 2 1 CATHODE ANODE REF NC NC CATHODE 1 2 3 5 ANODE 4 REF Figure 2. Pin Configuration of AS431 (Top View) Functional Block Diagram CATHODE REF + - VREF ANODE Figure 3. Functional Block Diagram of AS431 Nov. 2005 Rev. 1. 1 2 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Ordering Information AS431 AS431 Circuit Type Bandage Tolerance A: 0.4% B: 0.8% Package E1: Lead-Free Blank: Tin Lead TR: Tape and Reel or Ammo Blank: Tube or Bulk N: SOT-23-3 R: SOT-89 K: SOT-23-5 Z: TO-92 Package Temperature Range -40 to 125oC -40 to 125oC Voltage Tolerance 0.4% 0.8% 0.4% 0.8% 0.4% Part Number Tin Lead Lead Free AS431ANTR-E1 AS431BNTR-E1 AS431AKTR-E1 AS431BKTR-E1 AS431AZ-E1 AS431AZTR-E1 AS431BZ-E1 AS431BZTR-E1 AS431ARTR-E1 AS431BRTR-E1 Marking ID Tin Lead Lead Free EB5 EB6 E6H E6I AS431AZ-E1 AS431AZ-E1 AS431BZ-E1 AS431BZ-E1 E43G E43H Packing Type Tape & Reel Tape & Reel Tape & Reel Tape & Reel Bulk Ammo Bulk Ammo Tape & Reel Tape & Reel SOT-23-3 SOT-23-5 TO-92 -40 to 125oC 0.4% 0.8% 0.8% SOT-89 -40 to 125oC 0.4% 0.8% BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Nov. 2005 Rev. 1. 1 3 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Absolute Maximum Ratings (Note 1) Parameter Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation Junction Temperature Storage Temperature Range Symbol VKA IKA IREF PD TJ TSTG Value 40 -100 to 150 10 Z, R Package: 770 mW N, K Package: 370 160 -65 to 150 N Package: 330 Package Thermal Impedance JA Z Package: 150 R Package: 50 K Package: 250 ESD (Human Body Model) 4000 V oC/W o AS431 Unit V mA mA C 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 Cathode Voltage Cathode Current Operating Ambient Temperature Range Symbol VKA IKA Min VREF 1.0 -40 Max 36 100 125 Unit V mA oC Nov. 2005 Rev. 1. 1 4 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Electrical Characteristics for AS431 Operating Conditions: TA=25oC, unless otherwise specified. Parameter Reference Voltage Deviation of Reference Voltage Over-temperature Ratio of Change in Reference Voltage to the Change in Cathode Voltage Reference Current Deviation of Reference Current Over Full Temperature Range Minimum Cathode Current for Regulation Off-state Cathode Current 0.4% 0.8% Test Circuit 4 Symbol VREF VREF Conditions VKA=VREF, IKA=10mA VKA=VREF IKA=10mA 0 to 70oC -40 to 85 oC AS431 AS431 Min 2.490 2.480 Typ 2.500 2.500 4.5 4.5 -1.0 -0.5 0.7 0.4 0.4 Max 2.510 2.520 8 Unit V 4 mV 10 -2.7 mV/V -2.0 4 1.2 1.0 A A 5 VREF VKA IREF IREF IKA (Min) IKA (Off) ZKA IKA=10mA VKA= 10V to VREF VKA= 36V to 10V 5 5 4 IKA=10mA, R1=10K, R2= IKA=10mA, R1=10K R2=, TA=-40 to 85oC VKA=VREF VKA=36V, VREF=0 VKA=VREF, IKA=1 to 100mA, f 1.0KHz mA A 6 0.05 1.0 Dynamic Impedance 4 0.15 0.5 Nov. 2005 Rev. 1. 1 5 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Electrical Characteristics (Continued) AS431 R1 VIN IKA VKA VREF Figure 4. Test Circuit 4 for VKA=VREF R3 VIN IKA R1 IREF VKA=VREF(1+R1/R2)+ IREF R1 VREF VKA R2 Figure 5. Test Circuit 5 for VKA>VREF VIN IOFF VKA Figure 6. Test Circuit 6 for IOFF Nov. 2005 Rev. 1. 1 6 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Performance Characteristics AS431 2.510 VKA = VREF 2.505 Reference Voltage (V) IKA = 10mA Reference Current (A) 1.5 R1=10K,R2=Infinite IKA=10mA 1.0 2.500 2.495 0.5 2.490 2.485 -60 -40 -20 0 20 40 60 o 80 100 120 140 0.0 -60 -40 -20 0 20 40 60 80 0 100 120 140 Ambient Temperature ( C) Ambient Temperature ( C) Figure 7. Reference Voltage vs. Ambient Temperature Figure 8. Reference Current vs. Ambient Temperature 150 VKA=VREF TA=25 C 0 800 600 Cathode Current (A) 400 200 0 -200 VKA=VREF TA=25 C 0 Cathode Current (mA) 100 50 0 -50 -100 -2 -1 0 1 2 3 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 Cathode Voltage (V) Cathode Voltage (V) Figure 9. Cathode Current vs. Cathode Voltage Figure 10. Cathode Current vs. Cathode Voltage Nov. 2005 Rev. 1. 1 7 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Performance Characteristics (Continued) AS431 2.0 1.8 VKA=36V VREF=0 VREF / VKA (mV/V) -0.9 VKA=3.5V to 36V Off-state Cathode Current (A) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -40 -1.0 -1.1 -1.2 -1.3 -1.4 -20 0 20 40 60 o 80 100 120 -40 -20 0 20 40 60 o 80 100 120 Ambient Temperature ( C) Ambient Temperature ( C) Figure 11. Off-state Cathode Current vs. Ambient Temperature Figure 12. Ratio of Delta Reference Voltage to the Ratio of Delta Cathode Voltage Output 1K 60 10K 100K 1000K o 60 15K 10F I KA 242 50 TA = 25 C IKA = 10mA 50 40 Av (dB) 40 30 30 20 20 8.2K 10 10 0 1K 0 10K 100K 1000K Small Signal Frequency GND Figure 13. Small Signal Voltage Gain vs. Frequency Nov. 2005 Rev. 1. 1 8 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Performance Characteristics (Continued) AS431 IKA=10mA Reference Impedance () 10 TA=25 C o Output 1K IKA 50 1 0.1 1K 10K 100K 1,000K GND Frequency (Hz) Figure 14. Reference Impedance vs. Frequency 100 90 80 R1 (10K) IKA Stable Stable 150 Cathode Current (mA) 70 60 50 40 30 20 10 0 0.001 TA=25 C VKA=VREF VKA= 5V:No oscillation VKA=10V:No oscillation VKA=15V:No oscillation 0.01 0.1 1 10 o R2 Load Capacitance (F) Figure 15. Stability Boundary Conditions vs. Load Capacitance Nov. 2005 Rev. 1. 1 9 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Performance Characteristics (Continued) AS431 5 Input Input and Output Voltage (V) 4 Output 220 3 2 Output Pulse Generator f=100KHz 50 1 GND 0 0 2 4 6 Time (S) Figure 16. Pulse Response of Input and Output Voltage Nov. 2005 Rev. 1. 1 10 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Application R3 VIN R1 V OUT AS431 VOUT=(1+R1/R2) V REF R2 AS431 Figure 17. Shunt Regulator VIN R1 R4 R2 VREF VOUT VOUT=(1+R2/R3)*VREF AS431 R3 Figure 18. High Current Shunt Regulator R2 V IN Iout R1 IOUT=VREF/R2 + IKA AS431 Figure 19. Current Source or Current Limit Nov. 2005 Rev. 1. 1 11 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Typical Application (Continued) AS431 VIN R1 8.2K AZ1117 Adjust R2 250 AS431 R3 250 VOUT 5V, 1A Figure 20. Precision 5V 1A Regulator C1 R2 680 R5 R1 3 R3 R4 VOUT U2 C2 Q1 2 AS431 COMP PWM Controller VFB 4 PS521 Figure 21. PWM Converter with Reference Nov. 2005 Rev. 1. 1 12 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions TO-92 Unit: mm (inch) AS431 1.100(0.043) 1.400(0.055) 3.430(0.135) MIN 0.360(0.014) 0.510(0.020) 3.300(0.130) 3.700(0.146) 0.000(0.000) 0.380(0.015) 1.600(0.063) MAX 4.400(0.173) 4.700(0.185) 4.300(0.169) 4.700(0.185) 0.380(0.015) 0.550(0.022) 1.270(0.050) TYP 2.440(0.096) 2.640(0.104) Nov. 2005 Rev. 1. 1 13 14.100(0.555) 14.500(0.571) BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions (Continued) SOT-23-3 Unit: mm(inch) AS431 3.0 0.500(0.020) 0.700(0.028) 4 R0.100(0.004) 0.100(0.004) GAUGE PLANE 7.0 0.900(0.035) 1.100(0.043) R0.100(0.004) 2.0 1.050(0.041)REF 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 7.0 0.080(0.003) 0.150(0.006) 2.300(0.091) 2.500(0.098) 1.200(0.047) 1.400(0.055) 0.920(0.036) 0.980(0.039) 0.390(0.015) 0.450(0.018) 1.900(0.075)REF Nov. 2005 Rev. 1. 1 14 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions (Continued) SOT-23-5 Unit: mm(inch) AS431 2.820(0.111) 3.020(0.119) 0.100(0.004) 0.200(0.008) 2.650(0.104) 2.950(0.116) 1.500(0.059) 1.700(0.067) 0.200(0.008) 0.700(0.028) REF 0.950(0.037) TYP 0.300(0.012) 0.400(0.016) 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.600(0.024) 0 8 1.050(0.041) 1.250(0.049) 0.000(0.000) 0.100(0.004) 1.050(0.041) 1.150(0.045) Nov. 2005 Rev. 1. 1 15 BCD Semiconductor Manufacturing Limited Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS Mechanical Dimensions (Continued) SOT-89 Unit: mm(inch) AS431 1.630(0.064) 1.830(0.072) 1.400(0.055)* 4.400(0.173) 4.600(0.181) 0.000(0.000) 0.076(0.003) 1.400(0.055) 1.600(0.063) R0.200(0.008) 3.950(0.156) 4.250(0.167) 1.200(0.047) 0.900(0.035) 2.300(0.091) 2.600(0.102) 3 10 0.360(0.014) 0.480(0.019) 3.000(0.118) 0.360(0.014) 0.480(0.019) 0.440(0.017) 0.560(0.022) 0.360(0.014) 0.440(0.017) 3 10 R0.150(0.006) Nov. 2005 Rev. 1. 1 16 BCD Semiconductor Manufacturing Limited 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 - 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 BCD Semiconductor Manufacturing Limited - 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 27B, Tower C, 2070, Middle Shen Nan Road, Shenzhen 518031, China Tel: +86-755-8368 3987, Fax: +86-755-8368 3166 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 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 |
Price & Availability of AS431ANTR-E1
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |