SE431 ETC

Document overview

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Technical content

Features

Low voltage operation (2.5V) Adjustable output voltage V0 = VREF to 18V Wide operating current range 120µA to 100mA Low dynamic output impedance 0.2Ω (Typ.). Trimmed bandgap design up to + 0.5%. ESD rating is 5.5KV(Per MIL-STD-883D). Available in Lead Free Packages. Application Linear Regulators Adjustable Supplies Switching Power Supplies Battery Operated Computers Instrumentation Computer Disk Drives Block Diagram Vref Ref Cathode Anode Symbol Diagram Cathode Ref Anode

All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 2 SEAWARD ELECTRONICS Adjustable Precision Shunt Regulator SE431 Pin Configuration SOT-23-3 SOT-23-3L (SC59-3L) SOT-23-3 (Order as SE431S) SOT-23-5L SOP-8 TO-92 (Top View) SOT-89 Marking Information Package Marking Production Year Code Production Week Code Lead-Free Package SOT-23-3 SC59-3L SE431W SOT-23-3 S431W (SE431S) SOT-23-5L SE431W Starting with S, a bar on top of S is for production year 2001, and underlined S is for year 2002. The next character is marked on top for 2003, and underlined for 2004. The naming pattern continues with consecutive characters for later years. A-Z: 1-26 a-z: 27-52 Lead-free package is indicated by a dot on top of the week code. SOP-8 SE431 YYWW SOT-89 SE431 YYWW TO-92 SE431 YYWW YY is the year of production. 04 means the product is manufactured in year of 2004. WW is the week of production. 26 means the product is manufactured in the 26th week. Lead-free package is indicated by LF after YYWW.

All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 3 SEAWARD ELECTRONICS Adjustable Precision Shunt Regulator SE431 Absolute Maximum Ratings Parameter Symbol Maximum Units Cathode Voltage VKA V Continuous Cathode Current I KA 150 mA Reference Current I REF mA Operating Junction Temperature Range TJ 150 Storage Temperature Range TSTG -65 to 150 120 (SOT-89) 230 (SOT-23-3) 230 (SOT-23-5L) 150 (SOP-8) Thermal Resistance θ JA 220 (TO-92) °C/W Lead Temperature (Soldering) 10 seconds TLEAD 260

Electrical Characteristics

0.5% 2483 2495 2507 2470 2495 2520 Reference Voltage VREF VKA = VREF, IKA = 10mA 2445 2495 2545 mV Deviation of reference voltage over full temperature range VI(dev) VKA = VREF, IKA = 10mA TA = 0°C to 105°C mV Ratio of change in reference voltage to the change in cathode voltage ∆ VREF ∆ VKA IKA = 10mA, ∆VKA = 10 V - VREF -1.4 -2.7 mV/V Reference current IREF IKA = 10mA, R1=10kΩ, R2 = ∞ µA Deviation of Reference current over full temperature range II(dev) IKA = 10mA, R1=10kΩ, R2 = ∞, TA = 0°C to 105°C 0.4 1.2 µA Minimum cathode current for regulation IMIN VKA = VREF 0.2 mA Off-state cathode current IOFF VKA = 18V, VREF = 0 0.1 µA Dynamic impedance ZKA IKA = 1mA to 100mA, VKA = VREF, f ≤ 1kHZ 0.2 0.7 Ω

All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 4 SEAWARD ELECTRONICS Adjustable Precision Shunt Regulator SE431 Typical Performance Characteristics 2480 2485 2490 2495 2500 2505 2510 2515 2520 - 60 - 40 - 20 80 100 120 VKA =Vref IKA =10mA REFERENCE VOLTAGE Vs. JUNCTION TEMPERATURE Reference Voltage (mV) Junction Temperature ( oC) 0. 5 1. 5 2. 5 - 20 100 120 R1 = 10kΩ R2 = ∞ IKA =10mA REFERENCE INPUT CURRENT Vs. JUNCTION TEMPERATURE Reference Current (µA) Junction Temperature ( oC) - 200 200 400 600 800 - 1 V KA = Vref TA = 25oC CATHODE CURRENT Vs. CATHODE VOLTAGE Cathode Current (µA) Cathode Voltage (V) CATHODE CURRENT Vs. CATHODE VOLTAGE Cathode Current (mA) Cathode Voltage (V) -100 -75 -50 -25 100 125 150 VKA = Vref TA = 25oC

All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 5 SEAWARD ELECTRONICS Adjustable Precision Shunt Regulator SE431 Test Circuits V Vref Input KA IKA V Vref Input KA I KA Iref = Vref (1+ VKA ) + Iref x R1 V Input KA I off Test Circuit 1: VKA = VREF Test Circuit 2: VKA > VREF Test Circuit 3: Off State Current Application Diagram V Vref V OUT IN R GND SE431 = Vref (1+ VOUT R2 ) Thermal Consideration Package Power Rating (TA=25°C) Power Rating (TA=50°C) Power Rating (TA=70°C) SOT-23-3 (θJA=230°C/W) 435mW 326mW 239mW SOT-23-5L (θJA=230°C/W) 435mW 326mW 239mW TO-92 (θJA=220°C/W) 455mW 341mW 250mW 1. Maximum junction temperature is 125°C 2. θJA is measured with packages mounted onboard under still-air condition with 1W power applied. 3. Power rating is calculated using PD = (TJ – TA) /θJA, where TJ denotes junction temperature and TA denotes ambient temperature.

All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 6 SEAWARD ELECTRONICS Adjustable Precision Shunt Regulator SE431 OUTLINE DRAWING SOT-23-3 B C A D E F J G H K L MIN MAX MIN MAX A 0.110 0.120 2.80 3.04 B 0.047 0.055 1.20 1.40 C 0.083 0.104 2.10 2.64 D 0.035 0.040 0.89 1.03 E 0.070 0.080 1.78 2.05 F 0.018 0.024 0.45 0.60 G 0.015 0.020 0.37 0.51 H 0.0005 0.004 0.013 0.10 J 0.034 0.040 0.887 1.02 K 0.003 0.007 0.085 0.18 L 0.027 0.69 DIMN INCHES MM DIMENSIONS OUTLINE DRAWING SOT-23-5L B K A F D E C H J MIN MAX MIN MAX A 0.110 0.120 2.80 3.05 B 0.059 0.070 1.50 1.75 C 0.036 0.051 0.90 1.30 D 0.014 0.020 0.35 0.50 E 0.037 0.95 F 0.075 1.90 H 0.006 0.15 J 0.0035 0.008 0.090 0.20 K 0.102 0.118 2.60 3.00 DIMN INCHES MM DIMENSIONS OUTLINE DRAWING SC59-3L (SOT-23-3L) E B A C L Q D H SC 59-3L MIN MAX MIN MAX A 0.035 0.043 0.90 1.10 0.0004 0.005 0.01 0.13 B 0.012 0.020 0.30 0.50 C 0.004 0.008 0.09 0.20 D 0.110 0.122 2.80 3.10 H 0.098 0.122 2.50 3.10 E 0.059 0.067 1.50 1.70 e 0.008 0.022 0.20 0.55 L 0.014 0.031 0.35 0.80 Q 10℃ 10℃ DIMENSIONS DIMN INCHE MM 0.037REF 0.95REF 0.075REF 1.90REF

All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 7 SEAWARD ELECTRONICS Adjustable Precision Shunt Regulator SE431 OUTLINE DRAWING SOP-8 H E D A B C MIN MAX MIN MAX A 0.0532 0.0688 1.35 1.75 0.0040 0.0098 0.10 0.25 B 0.0130 0.0200 0.33 0.51 C 0.0075 0.0098 0.19 0.25 D 0.1890 0.1968 4.80 5.00 H 0.2284 0.2440 5.80 6.20 E 0.1497 0.1574 3.80 4.00 DIMENSIONS

0.050 BSC

1.27 BSC

A B D E G F H K J MIN MAX MIN MAX A 0.175 0.205 4.445 5.207 B 0.170 0.210 4.318 5.334 E 0.500 0.610 12.70 15.50 F 0.016 0.021 0.407 0.533 G 0.045 0.055 1.143 1.397 H 0.095 0.105 2.413 2.667 J 0.080 0.105 2.032 2.667 K 0.125 0.165 3.175 4.191 DIMN INCHES MM DIMENSIONS OUTLINE DRAWING SOT-89 A B C D E F G H I J K L M SOT-89 MIN MAX MIN MAX A 0.173 0.181 4.400 4.600 B 0.159 0.167 4.050 4.250 C 0.067 0.075 1.700 1.900 D 0.051 0.059 1.300 1.500 E 0.094 0.102 2.400 2.600 F 0.035 0.047 0.890 1.200 G H I 0.016 0.020 0.400 0.520 J 0.055 0.063 1.400 1.600 K 0.014 0.016 0.350 0.410 L M DIMN INCHES MM DIMENSIONS 0.70REF 10°TYP 0.028REF 10°TYP 3.00REF 1.50REF 0.118REF 0.059REF

All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 8 SEAWARD ELECTRONICS Adjustable Precision Shunt Regulator SE431 Customer Support Seaward Electronics Incorporated – China Rm 1605, Building 1, International Pioneering Park, #1 Shangdi Xinxi Rd Haidian District, Beijing 100085, China Tel: 86-10-8289-5700/01/05 Fax: 86-10-8289-5706 Seaward Electronics Corporation – Taiwan 2F, #181, Sec. 3, Minquan East Rd, Taipei, Taiwan R.O.C Tel: 886-2-2712-0307 Fax: 886-2-2712-0191 Seaward Electronics Incorporated – North America 49 Showers Dr. J126 Mountain View, CA 94040, USA Tel: 1-408-821-6600 Last Updated - 3/23/2005