AMC431DB

AMC431 www.addmtek.com DESCRIPTION The AMC431 is a three-terminal adjustable shunt voltage regulator with specified thermal stability and pin-to-pin compatible with the earlier 431 series. The output voltage can be adjusted to any value between VREF and 36V by using two external resistors. The AMC431 offers low output impedance for improved load regulation with a typical output impedance of 200mΩ. Because of the active output circuitry, the AMC431can replace the zener diodes in applications such as switching power supplies, OVP crowbar circuits, references for A/D, D/A converters with improved turn-on characteristics. PRECISION ADJUSTABLE SHUNT VOLTAGE REFERENCE FEATURES Initial voltage reference accuracy of 0.5%, 1.0%, and 1.5% Sink current capability from 1mA to 100mA Typical output dynamic impedance less than 200mΩ; Adjustable output voltage from VREF to 36V Available in 3L-TO92 and surface mount SOT89, SOT23. Low output noise Typical equivalent full range temperature coefficient of 30ppm/°C Pin assignment identical to earlier TL431 series. PACKAGE PIN OUT CATHODE ANODE ANODE VREF VREF CATHODE APPLICATIONS Voltage Reference Precision shunt regulator High current shunt regulator PWM down converter with reference Voltage monitor 3-Pin Plastic TO-92 (Top View) CATHODE ANODE VREF 3-Pin Plastic SOT-23 Surface Mount (Top View) (Note 1) VREF ANODE CATHODE 3-Pin Plastic SOT-89 Surface Mount (Top View) 3-Pin Plastic SOT-23 Surface Mount (Note 2) (Top View) Initial TA (°C) Tolerance LP TO-92 3-pin ORDER INFORMATION SOT-89 SOT-23 PK DB 3-pin 3-pin -AMC431PK AMC431PKF(Lead Free) AMC431BPK --AMC431DB AMC431DBF(Lead Free) AMC431BDB --- DB SOT-23 3-pin 0 to 70 AMC431BLPF(Lead Free) AMC431BPKF(Lead Free) AMC431BDBF(Lead Free) AMC431BRDBF(Lead Free) Note: 1. For AMC431RDB and AMC431BRDB. 2. For AMC431DB and AMC431BDB. 3. For surface-mount and TO-92 packages in Tape & Reel, add suffix “T” (e.g., AMC431LPT, AMC431DBT). 4. For TO-92 in Tape & Box (without reel), add suffix “TB” (e.g., AMC431LPTB). 5. DB package is only available in Tape & Reel. 6. The letter “F” is marked for Lead Free process. Copyright © 2006 ADDtek Corp. 1 DD021_G -JUNE 2006 1.5% 1.5% 1% 1% 0.5% 0.5% AMC431CLP AMC431LP AMC431LPF(Lead Free) AMC431BLP AMC431CLPF(Lead Free) -- AMC431RDB AMC431RDBF(Lead Free) AMC431BRDB AMC431 TYPICAL APPLICATION VO = 5V CATHODE V+ Rb R1 27.5K 0.1% REF BLOCK DIAGRAM + VREF ANODE Note: Rb should provide cathode current ≥ 1mA R2 27.5K 0.1% 5V Precision Regulator ABSOLUTE MAXIMUM RATINGS Cathode to Anode Voltage (VKA) (Note 2) Continuous Cathode Current (IK) Reference Input Current (IREF) Maximum junction temperature range, TJ Storage temperature range Lead temperature (soldiering, 10 seconds) Note 1: Note 2: (Note 1) -0.3V to 37V -100mA to 150mA -50uA to 10mA 150°C -65OC to 150OC 260°C Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. Voltage values are with respect to the anode terminal unless otherwise noted. Package LP LPF PK PKF DB DBF θJA (°C /W ) 156 156 71(note) 71(note) 285 285 POWER DISSIPATION TABLE TA=70°C Derating factor TA ≤ 25°C Power rating(mW) Power rating(mW) DF(mW/°C) TA ≥ 25°C 6.41 801 513 6.41 14.1 14.1 3.5 3.5 801 1763 1763 438 438 513 1128 1128 280 280 TA= 85°C Power rating (mW) 417 417 916 916 228 228 Note :1.For PK package, Thermal Resistance-Junction to Tab ( θJT ) = 35°C /W. TJ = TTAB + (PD × θJT). PD: Power Dissipation. 2.θJA: Thermal Resistance-Junction to Ambient, DF = 1/θJA Junction Temperature Calculation: TJ = TA + (PD × θJA). The θJA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no ambient airflow. Copyright © 2006 ADDtek Corp. 2 DD021_G -- JUNE 2006 AMC431 RECOMMENDED OPERATING CONDITIONS Parameter Operating free air temperature range, TA Cathode current, IK Cathode voltage, VKA ELECTRICAL CHARACTERISTICS Unless otherwise specified, these specifications apply over the operating ambient temperatures with TA = 25°C. Parameter Reference Input Voltage Reference Input Voltage Reference Input Voltage Reference Drift Voltage Ratio, Ref to Cathode (note 4) Reference Input Current Minimum Operating Current Off-State Cathode Current Dynamic Impedance Note 1: Note 2: Note 3: Note 4: Min 0 1 0 Max 70 100 36 Units °C mA V Symbol VREF VREF VREF IREF IMIN IOFF |ZKA | Min Typ Max IK = 10mA, VKA = VREF, note 1 2.475 2.500 2.525 V IK = 10mA, VKA = VREF, note 2 2.462 2.500 2.538 V IK = 10mA, VKA = VREF, note 3 2.487 2.500 2.513 V 4 17 mV IK = 10mA, VKA = VREF, 0°C ≤ TA ≤ 70°C mV/ IK = 10mA, VKA = 2.5V to 36V -1.4 -2.7 V IK = 10mA,VKA = VREF 2.3 µA 2 4 IK = 10mA,VKA = VREF, 0°C ≤ TA ≤ 70°C VKA = VREF 0.4 1 mA VKA = 36V, VREF = 0V 0.1 1 µA VKA = VREF, IK = 1mA to 100mA, 0.2 0.5 Ω f ≤ 1kHz Test Conditions AMC431 Units For AMC431 only. The output accuracy is 1.0%. For AMC431C only. The output accuracy is 1.5%. For AMC431B only. The output accuracy is 0.5%. VREF VKA Ratio of change in reference input voltage to the change in cathode voltage Copyright © 2006 ADDtek Corp. 3 DD021_G -- JUNE 2006 AMC431 PARAMETER MEASUREMENT INFORMATION Input VKA Input VKA R1 IREF VRE R2 Figure 1. Test Circuit for VKA = VREF Figure 2. Test Circuit for VKA > VREF Input VKA IOFF Figure 3. Test Circuit for IOFF Copyright © 2006 ADDtek Corp. 4 DD021_G -- JUNE 2006 AMC431 CHARACTERIZATION CURVES CATHODE CURRENT vs CATHODE VOLTAGE 150 125 100 IKA – Cathode Current (mA) IKA – Cathode Current (µA) 75 50 25 0 -25 -50 -75 -100 -2 0 1 VKA – Cathode Voltage (V) -1 2 3 -200 -1 0 1 VKA – Cathode Voltage (V) 2 3 VKA = VREF T A = 2 5° C 600 Imin 400 800 VKA = VREF T A = 25 ° C CATHODE CURRENT vs CATHODE VOLTAGE 200 0 REFERENCE INPUT VOLTAGE vs FREE-AIR EMPERATURE VREF – Reference Input Voltage (mV) 2600 IREF – Reference Input Current (µA) 2580 2560 2540 2520 IKA = 100mA 2500 2480 2460 2440 2420 2400 -75 -50 -25 0 25 50 75 100 125 IKA = 10mA VKA = VREF REFERENCE INPUT CURRENT vs FREE-AIR TEMPERATURE 5 R1 = 10 k Ω R2 = ∞ IKA = 10mA 4 3 2 1 0 TA – Free-Air Temperature - °C -75 -50 -25 0 25 50 75 TA – Free-Air Temperature - °C 100 125 Copyright © 2006 ADDtek Corp. 5 DD021_G -- JUNE 2006 AMC431 APPLICATION INFORMATION VBATT R* VO R1 0.1% VREF R2 0.1% Input Vth = 2.5V GND VO = (1 + R1/R2) × VREF Note: R should provide 1mA cathode current to the AMC431 of minimum VBATT VBATT AMC431 AMC431 VO Von ≈ 2V Voff ≈ VBATT Figure 4. Shunt Regulator Figure 5. Single –Supply Comparator With Temperature compensated threshold. VBATT VO VBATT R1 AMC431 R2 C VO R1 R2 AMC431 VO = (1 + R1/R2) × VREF Figure 6. High-Current Shunt Regulator Figure 7. Crowbar Circuit Copyright © 2006 ADDtek Corp. 6 DD021_G -- JUNE 2006 AMC431 APPLICATION INFORMATION (continued) VO = 5V/1.5A VBATT IO = VREF/RS VBATT 8.2KΩ AMC317 Adjust 243Ω 0.1% AMC431 243Ω 0.1% RS 0.1% AMC431 Figure 8.Precision 5V, 1.5A Regulator Figure 9. Precision Constant Current Sink VBATT IN AMC78L05 OUT VO VBATT RCL 0.1% IO Common AMC431 R1 R1 R2 AMC431 IOUT = (VREF/RCL) + IKA VO = (1 + R1/R2) × VREF Min VO = VREF + 5V Figure 10. Output Control of a Three-Terminal Fixed Regulator Figure 11. Precision Current Limiter R1 = VBATT/((IO/hFE) + IKA) Copyright © 2006 ADDtek Corp. 7 DD021_G -- JUNE 2006 AMC431 PACKAGE 3-Pin Plastic TO-92 INCHES M B K MILLIMETERS MAX MIN 4.45 4.32 3.18 TYP 4.57 4.57 3.62 0.38 1.27 3.81 MAX 5.21 5.33 4.19 - MIN A G F TYP A B 0.175 0.180 0.205 0.170 0.180 0.210 C 0.125 0.142 0.165 F C - 0.015 0.050 0.150 - G J N K M N Note: For TO-92 in taping, refer to TO-92 package and taping dimension data for lead dimensions. 0.500 0.580 5º 5º 12.70 14.73 5º 5º 3-Pin Plastic TO-92 Package and Taping Dimensions P1 P INCHES MIN C MILLIMETERS MAX MIN 2.00 12.2 12.4 3.8 5.85 4.2 17.0 15.5 5.7 8.5 TYP 12.7 12.7 4.0 6.35 5.0 18.0 16.0 6.0 9.0 MAX 13.2 13.0 4.2 6.85 5.6 19.0 16.5 6.3 9.5 TYP - C 0.079 P 0.480 0.500 0.520 Ho Wo Po 0.488 0.500 0.512 Do 0.150 0.157 0.165 P1 0.230 0.250 0.256 W W1 Fo 0.165 0.197 0.220 W 0.669 0.709 0.748 Ho 0.610 0.630 0.649 F1 Do Po Fo Wo 0.224 0.236 0.248 W1 0.335 0.354 0.374 Copyright © 2006 ADDtek Corp. 8 DD021_G -- JUNE 2006 AMC431 3-Pin Surface Mount SOT-89 INCHES MIN TYP MAX 0.181 0.102 0.063 0.017 0.090 0.019 MILLIMETERS MIN 4.39 2.28 1.39 0.38 2.13 0.33 TYP 1.49 BSC 2.99 BSC 0.45 3.94 1.70 0° 0.89 0.55 4.24 1.82 8° 1.19 MAX 4.59 2.59 1.60 0.43 2.28 0.48 A L C D A B 0.173 0.090 C 0.055 D 0.015 K N F J G H B E E F 0.084 0.016 M G H J K L M 0.059 BSC 0.118 BSC 0.018 0.155 0.067 0° 0.022 0.167 0.072 8° 0.047 N 0.035 Surface Mount SOT-23 D C L A MIN INCHES TYP MAX MILLIMETERS MIN 1.00 0.00 0.70 0.35 0.10 2.70 1.40 TYP 1.10 0.80 0.40 0.15 2.90 1.60 1.90 TYP. 2.60 0.37 1° 2.80 5° 3.00 9° MAX 1.30 0.10 0.90 0.50 0.25 3.10 1.80 0.039 0.043 0.051 0.004 E H H A1 0.000 A2 0.028 0.032 0.035 b 0.014 0.016 0.020 C 0.004 0.005 0.010 e M D 0.106 0.114 0.122 E e 0.055 0.063 0.071 0.075 TYP. A2 A A1 b H 0.102 0.110 0.118 L M 0.015 1° 5° 9° Copyright © 2006 ADDtek Corp. 9 DD021_G -- JUNE 2006 AMC431 IMPORTANT NOTICE ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer’s applications, the customer should provide adequate design and operating safeguards. ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of its products to the specifications applicable at the time of sale. ADDtek Corp. 9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105 TEL: 2-25700299 FAX: 2-25700196 Copyright © 2006 ADDtek Corp. 10 DD021_G -- JUNE 2006