TL432Z/AZ/CZ Low Voltage(1.24V) Adjustable Precision Shunt Regulator PROGRAMMABLE PRECISION REFERENCES FEATURES ● ● ● ● ● TO-92 PKG Low Voltage Operation : 1.24 V Programmable Out Voltage to 16V 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 TL432AZ TL432CZ TL432AZSF TL432CZSF Marking TL432AZ TL432CZ Package 432 SOT-23 TO-92 DESCRIPTION The TL432Z/AZ/CZ is a three-terminal Shunt Voltage Reference providing a highly accuracy 1.24 V, 1.25V bandgap reference with 1.0 % tolerance. The TL432Z/AZ/CZ 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 TL432Z/AZ/CZ 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 TL432Z/AZ/CZ FUNCTION BLOCK DIAGRAM CATHODE(K) CATHODE REFERENCE + REFERENCE(R) 1.24VREF ANODE(A) ANODE EQUIVALENT SCHEMATIC All component values are nominal HTC −2− TL432Z/AZ/CZ Low Voltage(1.24V) Adjustable Precision Shunt Regulator RECOMMENDED OPERATING CONDITIONS SYMBOL MIN. MAX. UNIT Cathode Voltage VKA VREF 16 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 0 ~ 70 ℃ Storage Temperature TSTG -65~+150 ℃ Total Power Dissipation PD TO-92 PKG = 770 ㎽ SOT-23 PKG = 230 HTC −3− Low Voltage(1.24V) Adjustable Precision Shunt Regulator (TA=25℃, unless otherwise specified) TL432AZ/CZ ELECTRICAL CHARACTERISTICS CHARACTERISTIC SYMBOL TEST CONDITION TL432AZ Reference Input Voltage VREF MIN. TYP. 1.228 VKA=VREF, IK=10㎃ MAX. UNIT 1.252 1.24 TL432CZ 1.233 V 1.247 VKA=VREF, IK=10㎃ Deviation of Reference Input Voltage Over TL432Z/AZ/CZ ΔVREF/ΔT TA=Full Range 1 25 ㎷ 1.0 2.7 ㎷/V Full Temperature Range Ratio of Change in Reference Input Voltage ΔVREF/ΔVKA VKA=1.25V to 14.5V to the Change in Cathod Voltage Reference Input Current IREF R1=10㏀, R2=∞ 0.15 0.5 ㎂ ΔIREF/ΔT R1=10㏀, R2=∞, Ta = Full Range 0.10 0.4 ㎂ 20 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 0.135 0.15 ㎂ ZKA VKA=VREF, IK=0.1㎃~100㎃, f≤1.0㎑ 0.05 0.15 Ω Current Dynamic Impedance HTC −4− TL432Z/AZ/CZ Low Voltage(1.24V) Adjustable Precision Shunt Regulator Parameter Measurement Information Fig. 1 Test Circuit for V INPUT KA =V REF VKA IKA Fig. 2 Test Circuit for V INPUT R1 DUT R2 VREF KA ≥V REF VKA IKA ＩREF DUT VREF VKA=VREF(1+R1/R2)+IREF R1 Fig. ３ Test Circuit for IKA （off) INPUT IKA(OFF) VKA DUT Typical Characteristics HTC −5− Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432Z/AZ/CZ 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, αV REF, is defined as : Maximum V REF V I(dev) 6 （ ）x10 ｜αVREF｜（ ppm ）= VREF at 25℃ ℃ ΔTA VI(dev) Minimum V REF ΔTA Where : ΔTA is the recommended operating free-air temperature range of the device. αVREF 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℃, ΔTA=125℃ for TL432CZ ｜αVREF｜= （ 7.2㎷ 6 ）x10 ~ 1241㎷ ~ 46PPM/℃ 125℃ Because minimum V REF occurs at the lower temperature, the coefficient is positive. Calculating Dynamic Impedance ｜ZKA｜= ΔVKA ΔIKA 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'｜= ΔV ΔI ~｜ZKA｜ （1+ R1 ） ~ R2 HTC −6−