CYT 432 Adjustable Precision Shunt Regulator General Description Features The CYT432 is a programmable shunt voltage ■ Adjustable output voltage V0 =1.24V to 12V. reference with guaranteed temperature stability ■ Wide operating current range 0.06 to 100mA. over the entire temperature range of operation. ■ Low dynamic output impedance 0.25Ω(Typ.) The output voltage may be set to any ■ Voltage Reference Tolerance: ±0.5%. value between 1.24V and 12V with two external ■ ESD rating is 4KV(Per MIL-STD-883D). resistors. This device has a typical output ■ Available in Lead Free Packages. impedance of 0.2Ω. Active output circuitry provides a very sharp turn on characteristic, Applications making this device excellent replacement for ■ Zener diodes in many applications. ■ The CYT432 is characterized for operation from 0°C to 105°C. ■ ■ ■ ■ TO-92 Package SOT-23 Package Adjustable Supplies Battery Operated Computers Computer Disk Drives Linear Regulators Instrumentation Switching Power Supplies SOP-8 Package ShenZhen CYT IC Design CO ,Ltd 1 SOT-89 Package CYT 432 Pin Configuration 1. Cathode 2. Ref 3. Anode 1. Cathode 2. Anode 3. Ref SOT-23 TO-92 1. Cathode 2. Anode 3. Anode 1.Ref 4. NC 2.Anode 5. NC 3.Cathode 6. Anode 7. Anode 8. Ref SOT-89 SOP8 Application Diagram ShenZhen CYT IC Design CO ,Ltd 2 CYT 432 Marking Information Package Production Week Code Marking Production Year Code Lead-Free Package Starting with S,a bar on top of S is for production SOT-23-3 SC59-3L year 2001,and underlined S is for year 2002.The CYT432 Lead-free package is A-Z:1-26 a-z:27-52 next character is marked on top for 2003, and underlined for 2004.The naming pattem continues indicated by a dot on top of the week code. with consecutive characters for later years. SOP-8 CYT432 YYWW SOT-89 CYT432 YYWW TO-92 CYT432 YYWW WW is the week of YY is the year of production. 04 means the product is manufactured in year of 2004. production. 26 Lead-free package is means the product indicated by LF after is manufactured in YYWW. th the 26 week. Absolute Maximum Ratings Symbol Parameter Value Units VKA Cathode to Anode Voltage 12 V I KA Continuous Cathode Current 150 mA I REF Reference Current 10 mA TJ Operating Junction Temperature Range 150 °C TSTG Storage Temperature Range -45 to 150 °C 220 (TO-92) θJA Thermal Resistance 230 (SOT-23) °C/W 150 (SOP-8) 120 (SOT-89) TLEAD Lead Temperature (Soldering) 10 seconds ShenZhen CYT IC Design CO ,Ltd 3 260 °C CYT 432 Electrical Characteristics Parameter Symbol Test Conditions 1.250V±0.5% Reference Voltage 1.240V±0.5% 1.240V±1.0% VREF 1.240V±1.5% Test circuit #1 VKA=VREF,IKA=10mA 1.240V±2.0% Min Typ Max Unit 1246 1250 1256 1234 1240 1246 1228 1240 1252 1221 1240 1259 1215 1240 1265 -- 10 25 mV mV Deviation of reference voltage over full temperature range VI(DEV) Test circuit #1 VKA=VREF,IKA=10mA TA=0°C to 105°C Ratio of change in reference voltage to the change in cathode volage △VREF △VKA Test circuit #2 IKA=10mA, △VKA=12V to VREF -- -1.0 -2.7 MV/V IREF Test circuit #2 IKA=10mA, R1=10KΩ, R2=∞, -- 0.15 2 uA Deviation of Reference current over full temperature range II(DEV) Test circuit #2 IKA=10mA, R1=10KΩ, R2=∞, TA=0°C to 105°C -- 0.10 0.50 uA Minimum cathode current for regulation IMIN Test circuit #1 VKA=VREF -- 60 100 uA Off-state cathode current IOFF VKA=12V, VREF=0 -- 0.04 0.8 uA ZKA Test circuit #1 IKA=100uA to 80mA, VKA=VREF, f ≤ 1KHz -- 0.25 1 Ω Reference current Dynamic impedance ShenZhen CYT IC Design CO ,Ltd 4 CYT 432 Typical Performance Characteristics ShenZhen CYT IC Design CO ,Ltd 5 CYT 432 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, CYT432 is unconditional stable with IK from 0 to 100mA and with CL from 0.001uF to 1u ShenZhen CYT IC Design CO ,Ltd 6 CYT 432 Test Circuits Block Diagram Symbol Diagram ShenZhen CYT IC Design CO ,Ltd 7 CYT 432 OUTLINE DRAWING SC59-3L (SOT-23-3L) DIM N A A1 B C D H E e e1 L1 L Q DIMENSIONS INCHES 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 0.95REF 0.075REF 1.90REF 0.008 0.022 0.20 0.55 0.014 0.031 0.35 0.80 0°C 10°C 0°C 10°C OUTLINE DRAWING TO-92 DIM A B E F G H J K N DIMENSIONS INCHES MM MIN MAX MIN MAX 0.175 0.205 4.445 5.207 0.170 0.210 4.318 5.334 0.500 0.610 12.70 15.50 0.016 0.021 0.407 0.533 0.045 0.055 1.143 1.397 0.095 0.105 2.413 2.667 0.080 0.105 2.032 2.667 0.125 0.165 3.175 4.191 ShenZhen CYT IC Design CO ,Ltd 8 CYT 432 OUTLINE DRAWING SOP-8 DIM N A A1 B B1 C D H E DIMENSIONS INCHES MM MIN MAX MIN MAX 0.0532 0.0688 0.35 1.75 0.0040 0.0098 0.10 0.25 0.0130 0.0200 0.33 0.51 0.050BSC 1.27BSC 0.0075 0.0098 0.19 0.25 0.1890 0.1968 4.80 5.00 0.2284 0.2440 5.80 6.20 0.1497 0.1574 3.80 4.00 OUTLINE DRAWING SOT-89 DIM A B C D E F G H I J K L M N DIMENSIONS INCHES MM MIN MAX MIN MAX 0.173 0.181 4.400 4.600 0.159 0.167 4.050 4.250 0.067 0.075 1.700 1.900 0.051 0.059 1.300 1.500 0.094 0.102 2.400 2.600 0.035 0.047 0.890 1.200 0.118REF 3.00REF 0.059REF 1.50REF 0.016 0.020 0.400 0.520 0.055 0.063 1.400 1.600 0.014 0.016 0.350 0.410 10°TYP 10°TYP 0.028REF 0.70REF ShenZhen CYT IC Design CO ,Ltd 9