TL432 TL432A TL432C TL432ASF TL432CSF 24VREF TL432A/C 46PPM/

PROGRAMMABLE PRECISION REFERENCES FEATURES TO-92 PKG Low Voltage Operation : 1.24 V Programmable Out Voltage to 18V Sink Current

Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432 TL432 A / C PROGRAMMABLE PRECISION REFERENCES FEATURES TO-92 PKG Low Voltage Operation : 1.24 V Programmable Out Voltage to 18V Sink Current Capability of 1 mA to 100 mA Equivalent Full-Range Temperature Coefficient of 50 ppm/ Temperature Compensated for Operation over Full Rated 3.Cathode 2.Anode 1.Reference Operating Temperature Range Trimmed Bandgap to 5% Moisture Sensitivity Level 3 SOT-23 2.90*1.30*1.00 2.Anode 1.Reference 3.Cathode APPLICATION Shunt Regulator Voltage Monitoring Current Source and Sink Circuits Anolog and Digital Circuits Requiring Precision References Low Out Voltage (3.0V to 3.3V) Switching Power Supply Error Amplifier ORDERING INFORMATION Device TL432 TL432 TL432A TL432A TL432C TL432C TL432ASF TL432ASF TL432CSF TL432CSF Marking TL432 TL432 TL432A TL432A TL432C TL432C Package 432 SOT-23 TO-92 DESCRIPTION The TL432 TL432[ESD] is a three-terminal Shunt Voltage Reference providing a highly accuracy 1.24 V, 1.25V bandgap reference with 1.0 % tolerance. The TL432 TL432[ESD] thermal stability and wide operating current (100mA), makes is suitable for all variety of applications that are looking for a low cost solution with high performance. The TL432 TL432[ESD] is an ideal voltage reference in an isolated feed circuit for 3.0V to 3.3V switching mode power supplies. HTC 2008 - Ver 1.0 -1- Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432 TL432 A / C FUNCTION BLOCK DIAGRAM CATHODE(K) CATHODE REFERENCE + REFERENCE(R) 1.24VREF 24VREF ANODE(A) ANODE EQUIVALENT SCHEMATIC All component values are nominal HTC -2- Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432 TL432 A / C RECOMMENDED OPERATING CONDITIONS SYMBOL MIN. MAX. UNIT Cathode Voltage VKA VREF 18 V Cathode Current IK 8 100 CHARACTERISTIC DISSIPATION RATING TABLE1-FREE-AIR TEMPERATURE TA=70 TA=25 Derating Factor Power Rating Above TA=25 TO-92 770 6.2/ 491 398 - SOT-23 230 1.8/ 149 122 - Package TA=85 TA=125 Power Rating Power Rating Power Rating ABSOLUTE MAXIMUM RATINGS (Full Operating Ambient Temperature Range Applies Unless Otherwise Noted) CHARACTERISTIC SYMBOL RATING UNIT Cathode Voltage VKA 20 V Continuous Cathode Current Range IKA 100 Reference Input Current Range IREF 3 Junction Temperature TJ -40 ~ +150 Operating Temperature TOPR -40 ~ +105 Storage Temperature TSTG -65 ~ +150 Total Power Dissipation PD 770 HTC -3- Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432 TL432 A / C (TA=25, unless otherwise specified) TL432A/C TL432A/C ELECTRICAL CHARACTERISTICS CHARACTERISTIC SYMBOL TEST CONDITION TL432A TL432A Reference Input Voltage VREF TYP. 1.228 VKA=VREF, IK=10 MAX. UNIT 1.252 1.24 TL432C TL432C 1.234 V 1.246 VKA=VREF, IK=10 Deviation of Reference Input Voltage Over MIN. VREF/T TA=Full Range 10 25 1.0 2.7 /V Full Temperature Range Ratio of Change in Reference Input Voltage VREF/VKA VKA=1.25V to 14.5V to the Change in Cathod Voltage Reference Input Current IREF R1=10, R2= 0.25 0.5 IREF/T R1=10, R2=, Ta = Full Range 0.05 0.3 60 80 Deviation of Reference Input Current Over Full Temperature Range Minimum Cathode IKAMIN Vka=Vref Current for Regulation Off-State Cathode IKAOFF VKA=16V, V REF=0 0.04 0.5 ZKA VKA=VREF, IK=0.1~100, f1.0 0.2 0.4 Current Dynamic Impedance HTC -4- Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432 TL432 A / C Fig. 1 Test Circuit for V INPUT KA =V REF Fig. 2 Test Circuit for V VKA IKA INPUT R1 DUT R2 VREF KA V REF VKA IKA REF DUT VREF VKA=VREF(1+R1/R2)+IREF R1 Fig. Test Circuit for IKA off) VKA INPUT IKA(OFF) DUT HTC -5- Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432 TL432 A / C The deviation parameters V REF(DEV) and IREF(DEF) are defined as the differences between the maximum and minimum values obtained over the recommended temperature range. The average full-range temperature coefficient of the reference voltage, V REF, is defined as : Maximum V REF V I(dev) 6 x10 ppm VREF at 25 VREF = TA VI(dev) Minimum V REF TA Where : TA is the recommended operating free-air temperature range of the device. VREF can be positive or negative, depending on whether minimum V REF or maximum V REF, respectively, occurs at the lower temperature. Example : Maximum V REF=1190 at 30, maximum VREF=1262 at 0, VREF=1241 at 25, TA=125 for TL432C TL432C VREF= 7.2 x106 ~ 46PPM/ 46PPM/ 1241 ~ 125 Because minimum V REF occurs at the lower temperature, the coefficient is positive. Calculating Dynamic Impedance ZKA= VKA IKA The dynamic impedance is defined as : When the device is operating with two external resistors (see Figure 3), the total dynamic impedance of the circuit is given by : Z'= V I ~ZKA 1+ R1 ~ R2 HTC -6-