Description Features The SE431D is a low voltage three terminal ¾ Low voltage operation (2.5V) adjustable shunt regulator with a guaranteed ¾ Adjustable output voltage V0 = VREF to 18V thermal temperature ¾ Wide operating current range 150μA to 80mA ranges. The output voltage can be set to any value ¾ Low dynamic output impedance 0.08Ω (Typ.). between VREF (approximately 2.5 V) to 18V with two ¾ Trimmed bandgap design up to + 0.5%. external resistors. This device has a typical output ¾ ESD rating is 6KV(Per MIL-STD-883D). impedance of 0.08Ω. ¾ RoHS Compliant and 100% Lead (Pb)-Free. stability over applicable Active output circuitry provides a very sharp turn on characteristic, making this device excellent replacement for Zener diodes in many applications. The SE431D is characterized for operation from -40oC to 85oC, and five package options (SOT-23-3, SOT-23-5, SOP-8, TO-92 and SOT-89) allow the designer the opportunity to select the proper package for their applications. Application ¾ Linear Regulators ¾ Adjustable Supplies ¾ Switching Power Supplies ¾ Battery Operated Computers ¾ Instrumentation ¾ Computer Disk Drives Symbol Diagram Block Diagram Cathode Ref Cathode + Ref Vref Anode Revision 12/4/2008 All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 1 Anode Marking Information Package Marking SOT-23-3 Production Batch Number 431x SC59-3L 431Sx SOT-23-3 The last character is the batch number. Lead-free package is indicated by a dot on top of the last character. (SE431DS) SOT-23-5L Lead-Free Package 431x SE431 SOP-8 XXXX-LF SE431 SOT-89 XXXX is the batch number. Lead-free package indicated by LF after XXXX. XXXX-LF SE431 TO-92 XXXX-LF Pin Configuration SOT-23-3 SOT-23-3 SOT-23-3L (SC59-3L) (Order as SE431DS) SOT-23-5L TO-92 SOP-8 is (Top View) SOT-89 Revision 12/4/2008 All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 2 Absolute Maximum Ratings Parameter Symbol Maximum Units Cathode Voltage VKA 18 V Continuous Cathode Current I KA 80 mA Reference Current I REF 1 mA TJ -40 to 85 °C TSTG -65 to 150 °C Operating Junction Temperature Range Storage Temperature Range 120 (SOT-89) 230 (SOT-23-3) θ JA Thermal Resistance °C/W 230 (SOT-23-5L) 150 (SOP-8) 220 (TO-92) Lead Temperature (Soldering) 10 seconds TLEAD 260 °C Electrical Characteristics TA=25℃, unless otherwise specified. TEST PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 2483 2495 2507 2470 2495 2520 2445 2495 2545 -- -14 -- mV -- 0.2 2.7 mV/V -- 0.3 4 μA -- -0.13 -- μA CIRCUIT 0.5% Reference Voltage 1% VREF 1 VKA = VREF, IKA = 10mA 2% Deviation of reference voltage over full VKA = VREF, IKA = 10mA mV VI(dev) 1 change in cathode voltage ΔVREF ΔVKA 2 Reference current IREF 2 II(dev) 2 IMIN 1 VKA = VREF -- 0.15 0.3 mA Off-state cathode current IOFF 3 VKA = 18V, VREF = 0 -- 0.4 1 μA Dynamic impedance ZKA 1 -- 0.08 0.7 Ω temperature range Ratio of change in reference voltage to the Deviation of Reference current over full temperature range Minimum cathode current for regulation TA = -40°C to 85°C IKA = 3mA, ΔVKA = 10 V - VREF IKA = 10mA, R1=10kΩ, R2 = ∞ IKA = 10mA, R1=10kΩ, R2 = ∞, TA = -40°C to 85°C IKA = 1mA to 80mA, VKA = VREF, f ≤ 1kHZ Revision 12/4/2008 All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 3 Typical Performance Characteristics Cathode Current VS. Cathode Voltage CATHODE CURRENT Vs. CATHODE VOLTAGE VKA = Vref TA = 25oC 50 Cathode Current (mA) Cathode Current (uA) 75 1200 25 0 -25 VKA=Vref TA=25 ℃ 1000 800 600 400 200 -50 0 -75 -200 -100 -2 -1 0 1 2 -1 3 Cathode Voltage (V) 0 1 Reference Voltage (V) Reference Voltage VS Junction Temperature 2.6 2.58 2.56 2.54 2.52 2.5 2.48 2.46 2.44 2.42 2.4 -50 -25 0 25 50 75 2 Cathode Voltage (V) 100 Junction Temperature (℃) Revision 12/4/2008 All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 4 3 Test Circuits Input Input V KA Input VKA VKA I off I KA I KA R1 Iref R2 Vref Vref R1 VKA = Vref (1+ ) + Iref x R1 R2 Test Circuit 1: Test Circuit 2: Test Circuit 3: VKA = VREF VKA > VREF Off State Current Application Diagram Thermal Consideration Package Power Rating Power Rating Power Rating (TA=25°C) (TA=50°C) (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. Revision 12/4/2008 All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 5 OUTLINE DRAWING SOT-23-3 C DIMENSIONS INCHES MM MIN MAX MIN MAX J H B N DIM A B C D E F G H J K L D A E G F K L 0.110 0.047 0.083 0.035 0.070 0.018 0.015 0.0005 0.034 0.003 - 0.120 0.055 0.104 0.040 0.080 0.024 0.020 0.004 0.040 0.007 0.027 2.80 1.20 2.10 0.89 1.78 0.45 0.37 0.013 0.887 0.085 - 3.04 1.40 2.64 1.03 2.05 0.60 0.51 0.10 1.02 0.18 0.69 OUTLINE DRAWING SC59-3L (SOT-23-3L) H DIM A A A1 B C D H E e e1 L1 L Q E A1 B e1 D L SC 59-3L Q L1 C N DIMENSIONS INCHE MM MIN MAX MIN MAX 0.035 0.043 0.90 1.10 0.0004 0.005 0.01 0.13 0.012 0.020 0.30 0.50 0.004 0.008 0.09 0.20 0.110 0.122 2.80 3.10 0.098 0.122 2.50 3.10 0.059 0.067 1.50 1.70 0.037REF 0.075REF 0.008 0.014 0℃ 0.022 0.031 10℃ 0.95REF 1.90REF 0.20 0.35 0℃ 0.55 0.80 10℃ OUTLINE DRAWING SOT-23-5L K B H D A F E C J DIMN A B C D E F H J K DIMENSIONS INCHES MM MIN MAX MIN MAX 0.110 0.059 0.036 0.014 0.0035 0.102 0.120 0.070 0.051 0.020 0.037 0.075 0.006 0.008 0.118 2.80 1.50 0.90 0.35 0.090 2.60 Revision 12/4/2008 All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 6 3.05 1.75 1.30 0.50 0.95 1.90 0.15 0.20 3.00 OUTLINE DRAWING TO-92 DIMENSIONS INCHES MM MIN MAX MIN MAX A DIMN B D A B E F G H J K E G F H K J 0.175 0.170 0.500 0.016 0.045 0.095 0.080 0.125 0.205 0.210 0.610 0.021 0.055 0.105 0.105 0.165 4.445 4.318 12.70 0.407 1.143 2.413 2.032 3.175 5.207 5.334 15.50 0.533 1.397 2.667 2.667 4.191 OUTLINE DRAWING SOP-8 1 8 2 7 3 6 4 5 D B N DIM B1 A1 A E H C A A1 B B1 C D H E DIMENSIONS INCHES MM MIN MAX MIN MAX 0.0532 0.0688 0.0040 0.0098 0.0130 0.0200 0.050 BSC 0.0075 0.0098 0.1890 0.1968 0.2284 0.2440 0.1497 0.1574 1.35 1.75 0.10 0.25 0.33 0.51 1.27 BSC 0.19 0.25 4.80 5.00 5.80 6.20 3.80 4.00 OUTLINE DRAWING SOT-89 N DIM SOT-89 A C D J M K E F B L H G I A B C D E F G H I J K L M DIMENSIONS INCHES MM MIN MAX MIN MAX 0.173 0.181 0.159 0.167 0.067 0.075 0.051 0.059 0.094 0.102 0.035 0.047 0.118REF 0.059REF 4.400 4.600 4.050 4.250 1.700 1.900 1.300 1.500 2.400 2.600 0.890 1.200 3.00REF 1.50REF 0.016 0.020 0.055 0.063 0.014 0.016 10°TYP 0.028REF 0.400 0.520 1.400 1.600 0.350 0.410 10°TYP 0.70REF Revision 12/4/2008 All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 7 Customer Support Seaward Electronics Incorporated – China Section B, 2nd Floor, ShangDi Scientific Office Complex, #22 XinXi Road 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 1512 Centre Pointe Dr. Milpitas, CA95035, USA Tel: 1-408-821-6600 Last Updated - 12/4/2008 Revision 12/4/2008 All contents are subject to change without prior notice. © Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 8