SE432L

Description The SE432L is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal stability over applicable temperature ranges. The output voltage can be set to any value between VREF (approximately 1.24 V) to 8V with two external resistors. This device has a typical output impedance of 0.30Ω. Active output circuitry provides a very sharp turn on characteristic, making this device excellent replacement for Zener diodes in many applications. The SE432 is characterized for operation from -40oC to 105oC, and two package options (SOT-23 and TO-92) allow the designer the opportunity to select the proper package for their applications. Features Low voltage operation (1.24V) Adjustable output voltage V0 =VREF to 8V Wide operating current range 60μA to 100mA Low dynamic output impedance 0.30Ω (Typ.) Trimmed bandgap design up to + 0.5%. ESD rating is 2.5KV(Per MIL-STD-883D) 100% Lead (Pb)-Free. Application Linear Regulators Adjustable Supplies Switching Power Supplies Battery Operated Computers Instrumentation Computer Disk Drives Pin Configuration SOT-23-3, SC59-3L (Top View) TO-92 (Top View) Marking Information Package SOT-23-3 SC59-3L Marking Production Batch Number The last character is the batch number. Lead-Free Package Lead-free package is indicated by a dot on top of the last character. SE432L XXXX XXXX is the batch number. Lead-free indicated XXXX. package by LF is after S432Lx TO-92 Revision 12/4/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2004. • www.seawardinc.com.cn • Page 1 Absolute Maximum Rating Parameter Cathode Voltage Continuous Cathode Current Reference Current Operating Junction Temperature Range Storage Temperature Range Thermal Resistance Lead Temperature (Soldering) 10 seconds Symbol VKA I KA I REF TJ TSTG θ JA TLEAD Maximum 8 150 3 150 -45 to 150 230 (SOT-23-3) 220 (TO-92) 260 °C Units V mA mA °C °C °C/W Electrical Characteristics Parameter 0.5% Reference Voltage 1.0% 1.5% 2.0% 1.25V 1%(1) Deviation of Reference Voltage over Full Temperature Range Ratio of Change in Reference Voltage to the Change in Cathode Voltage Reference Current Test circuit #1 VI(DEV) VKA = VREF, IKA = 10mA, TA =-40°C - 105°C ︱ΔVREF/ΔVKA︱ Test circuit #2 IKA = 10mA, ΔVKA = 8V to VREF Test circuit #2 IKA = 10mA, R1=10kΩ, R2 = ∞ Test circuit #2 II(DEV) IKA = 10mA, R1=10kΩ, R2 = ∞ TA = 0°C - 105°C IMIN Test circuit #1 VKA = VREF Test circuit #3 VKA = 8V, VREF = 0 Test circuit #1 Symbol Test Conditions & Circuit Min 1234 Typ 1240 1240 1240 1240 1250 Max 1246 1252 1259 1265 1263 Unit VREF Test circuit #1 VKA = VREF, IKA = 10mA 1228 1221 1215 1237 mV -- 68 mV -- 1.0 2.7 mV/V IREF -- 0.15 2 μA Deviation of Reference Current over Full Temperature Range Minimum Cathode Current for Regulation Off-state Cathode Current -- 0.10 μA -- 60 100 μA IOFF -- 0.04 0.8 μA Dynamic Impedance | ZKA | IKA = 100μA - 80mA, VKA = VREF, f ≤ 1kHZ -- 0.30 1 Ω Note 1: Upon Customer Request. Revision 12/4/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2004. • www.seawardinc.com.cn • Page 2 Typical Performance Characteristics Cathode Current VS Cathode Voltage 150 Cathode Current (mA) 100 50 0 -50 -100 -150 -1.5 -1 -0.5 0 0.5 1 1.5 Cathode Voltage (V) Revision 12/4/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2004. • www.seawardinc.com.cn • Page 3 Stability Boundary Condition 100 80 IKA (mA) 60 40 20 0 0.1 0.001 0.01 1 VKA=3V CL (uF) VKA=VREF (1.24V) VKA=2V The areas under the curves represent conditions that may cause the device to oscillate. For VKA = 2V and 3V curves, R2 and VBAT were adjusted to establish the initial VKA and IK conditions with CL = 0. VBAT and CL then were adjusted to determine the ranges of stability. As the graph suggested, SE432L is unconditional stable with IK from 0 to 100mA and with CL from 0.001uF to 1uF. Revision 12/4/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2004. • www.seawardinc.com.cn • Page 4 Symbol Diagram Cathode Block Diagram Cathode Ref + Ref Vref Anode Anode Test Circuits Input V KA Input VKA Input VKA I KA I KA I off R1 Iref Vref R2 Vref R1 VKA = Vref (1+ ) + Iref x R1 R2 Test Circuit 1: VKA = VREF Test Circuit 2: VKA > VREF Test Circuit 3: Off State Current Application Circuit VIN R VOUT R1 Vref R2 SE432 VOUT = Vref (1+R1 ) R2 GND Revision 12/4/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2004. • www.seawardinc.com.cn • Page 5 OUTLINE DRAWING SOT-23-3 C J B H DIM D A E N DIMENSIONS INCHES MM MIN MAX MIN MAX 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 F G K L A B C D E F G H J K L OUTLINE DRAWING SC59-3L 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℃ H A DIM A1 N E B e1 D L Q SC 59-3L L1 C A A1 B C D H E e e1 L1 L Q OUTLINE DRAWING TO-92 A B D DIM A B E F G H J K N DIMENSIONS INCHES MM MIN MAX MIN MAX 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 E G F H K J Revision 12/4/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2004. • www.seawardinc.com.cn • Page 6 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 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2004. • www.seawardinc.com.cn • Page 7