AMC431PK

AMC DOC. #: AMC431_C November 2002  ADD MICROTECH CORP. DESCRIPTION ! ! ! # # AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REFERENCE FEATURES 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. APPLICATIONS ! ! ! ! ! # # # 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 and 8 pin S.O.I.C. packages Low output noise Typical equivalent full range temperature coefficient of 30ppm/°C Pin assignment identical to earlier TL431 series. PACKAGE PIN OUT Voltage Reference Precision shunt regulator High current shunt regulator PWM down converter with reference Voltage monitor CATHODE ANODE VREF CATHODE ANODE ANODE NC VREF ANODE ANODE NC 3-Pin Plastic TO-92 (Top View) VREF ANODE 8-Pin Plastic S.O.I.C. Surface Mount (Top View) CATHODE ANODE CATHODE VREF CATHODE ANODE VREF 3-Pin Plastic SOT-89 Surface Mount (Top View) (Note 1) 3-Pin Plastic SOT-23 Surface Mount (Top View) (Note 2) 3-Pin Plastic SOT-23 Surface Mount (Top View) ORDER INFORMATION TA (°C) Initial Tolerance DM SOIC 8-pin -- LP TO-92 3-pin PK SOT-89 3-pin -- DB SOT-23 3-pin -- DB SOT-23 3-pin -- 1.5% AMC431CLP AMC431LP 0 to 70 1% AMC431DM AMC431PK AMC431DB AMC431RDB 0.5% AMC431BPK AMC431BDB AMC431BRDB -AMC431BLP Note: 1. For AMC431DB and AMC431BDB. 2. For AMC431RDB and AMC431BRDB. 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. Copyright  2002, ADD Microtech Corp. 1 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS BLOCK DIAGRAM TYPICAL APPLICATION VO = 5V V+ Rb CATHODE Note: Rb should provide cathode current ≥ 1mA R1 27.5K 0.1% R2 27.5K 0.1% REF + VREF ANODE 5V Precision Regulator ABSOLUTE MAXIMUM RATINGS (Note 1) -0.3V to 37V Cathode to Anode Voltage (VKA) (Note 2) -100mA to 150mA Continuous Cathode Current (IK) -50uA to 10mA Reference Input Current (IREF) 150°C Maximum junction temperature range, TJ Storage temperature range -65OC to 150OC Lead temperature (soldiering, 10 seconds) 260°C Note 1: 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. Note 2: Voltage values are with respect to the anode terminal unless otherwise noted. POWER DISSIPATION TABLE Package θJA Derating factor DF(mW/°C) TA ≥ 25°C (°C /W ) DM LP PK 165 156 71(note) 6.06 6.41 14.1 TA ≤ 25°C Power rating(mW) 757 801 1763 TA=70°C Power rating(mW) 485 513 1128 TA= 85°C Power rating (mW) 394 417 916 228 DB 285 3.5 438 280 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  2002, ADD Microtech Corp. 2 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS RECOMMENDED OPERATING CONDITIONS Operating free air temperature range, TA Cathode current, IK Cathode voltage, VKA Min 0 1 0 Max 70 100 36 Units °C mA V 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 Symbol VREF VREF VREF Test Conditions AMC431 Min Typ Max Units 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 IK = 10mA, VKA = 2.5V to 36V -1.4 -2.7 mV/V 2 0.4 0.1 0.2 2.3 4 1 1 0.5 µA mA µA Ω IK = 10mA,VKA = VREF IK = 10mA,VKA = VREF, 0°C ≤ TA ≤ 70°C Minimum Operating Current IMIN VKA = VREF VKA = 36V, VREF = 0V Off-State Cathode Current IOFF VKA = VREF, IK = 1mA to 100mA, Dynamic Impedance |ZKA | f ≤ 1kHz Note 1: For AMC431 only. The output accuracy is 1.0%. Note 2: For AMC431C only. The output accuracy is 1.5%. Note 3: For AMC431B only. The output accuracy is 0.5%. VREF Note 4: Ratio of change in reference input voltage to the change in cathode voltage VKA IREF Copyright  2002, ADD Microtech Corp. 3 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS PARAMETER MEASUREMENT INFORMATION Input VKA Input VKA R1 IREF R2 VRE Figure 1. Test Circuit for VKA = VREF Figure 2. Test Circuit for VKA > VREF Input VKA IOFF Figure 3. Test Circuit for IOFF Copyright  2002, ADD Microtech Corp. 4 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS 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 -1 0 1 VKA – Cathode Voltage (V) 2 3 -200 -1 VKA = VREF TA = 25°C 600 800 CATHODE CURRENT vs CATHODE VOLTAGE VKA = VREF TA = 25°C Imin 400 200 0 0 1 VKA – Cathode Voltage (V) 2 3 REFERENCE INPUT VOLTAGE vs FREE-AIR TEMPERATURE 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 0 TA – Free-Air Temperature - °C -75 IKA = 10mA VKA = VREF 5 REFERENCE INPUT CURRENT vs FREE-AIR TEMPERATURE R1 = 10 k Ω R2 = ∞ IKA = 10mA 4 3 2 1 -50 -25 0 25 50 75 TA – Free-Air Temperature - °C 100 125 Copyright  2002, ADD Microtech Corp. 5 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS APPLICATION INFORMATION VBATT R* VO R1 0.1% VREF R2 0.1% Input VBATT AMC431 AMC431 VO Von ≈ 2V Voff ≈ VBATT Vth = 2.5V GND VO = (1 + R1/R2) × VREF Note: R should provide 1mA cathode current to the AMC431 of minimum 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  2002, ADD Microtech Corp. 6 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS APPLICATION INFORMATION (continued) VBATT 8.2KΩ AMC317 Adjust VO = 5V/1.5A VBATT IO = VREF/RS 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  2002, ADD Microtech Corp. 7 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS 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 0.500 0.580 5º 5º 12.70 14.73 5º 5º Note: For TO-92 in taping, refer to TO-92 package and taping dimension data for lead dimensions. 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 W 1 0.335 0.354 0.374 Copyright  2002, ADD Microtech Corp. 8 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS 8-Pin Plastic S.O.I.C. INCHES MIN A B B F P 0.183 0.144 TYP MAX 0.202 0.163 0.074 0.020 0.035 MILLIMETERS MIN 4.65 3.66 1.73 0.25 0.38 TYP 1.27 BSC 0.19 0.13 4.80 5.79 0.25 0.25 5.21 8º 6.20 MAX 5.13 4.14 1.88 0.51 0.89 A C 0.068 D 0.010 F 0.015 D G L C G J K M J L M P 0.050 BSC 0.007 0.005 0.189 0.228 0.010 0.010 0.205 8º 0.244 SEATING PLAN seating plane K 3-Pin Surface Mount SOT-89 INCHES MILLIMETERS MAX 0.181 0.102 0.063 0.017 0.090 0.019 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 MIN A B 0.173 0.090 TYP - 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 Copyright  2002, ADD Microtech Corp. 9 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS Surface Mount SOT-23 D C 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 L H A 0.039 0.043 0.051 0.004 A1 0.000 E A2 0.028 0.032 0.035 b 0.014 0.016 0.020 C 0.004 0.005 0.010 D 0.106 0.114 0.122 e M E e 0.055 0.063 0.071 0.075 TYP. H 0.102 0.110 0.118 A2 A A1 b L M 0.015 1° 5° 9° Copyright  2002, ADD Microtech Corp. 10 www.addmtek.com AMC DOC. #: AMC431_C November 2002 AMC431 PRECISION ADJUSTABLE SHUNT VOLTAGE REGULATORS IMPORTANT NOTICE ADD Microtech (ADDM) 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. ADDM 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 ADDM 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. ADDM assumes to no liability to customer product design or application support. ADDM warrants the performance of its products to the specifications applicable at the time of sale. U.S. ADD Microtech Inc. 492 Altamont Drive Milpitas, CA 95035 T E L : (408) 9410420 FA X : (408) 9410864 Asia Pacific region ADD Microtech Corp 3F, 132, Sec. 4, Chung Hsiao E. Rd., Taipei, Taiwan T E L : 2-27760166 FA X : 2-27764208 Copyright  2002, ADD Microtech Corp. 11 www.addmtek.com