TS431 Adjustable Precision Shunt Regulator TO-92 SOT-89 SOT-23 SOP-8 Pin Definition: Pin Definition: Pin Definition: 1. Reference 1. Reference 1. Cathode 8. Reference 2. Anode 2. Cathode 2. Anode 7. Anode 3. Anode 6. Anode 3. Cathode 3. Anode 4. N/C 5. N/C General Description TS431 series integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from V to 36 volts with two REF external resistors. These devices exhibit a wide operating current range of 1.0 to 100mA with a typical dynamic impedance of 0.22. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5V reference makes it convenient to obtain a stable reference from 5.0V logic supplies, and since The TS431 series operates as a shunt regulator, it can be used as either a positive or negative stage reference Features Ordering Information Precision Reference Voltage Part No. Package Packing TS431 2.495V 2% TS431xCT B0 TO-92 1Kpcs / Bulk TS431A 2.495V 1% TS431xCT B0G TO-92 1Kpcs / Bulk TS431B 2.495V 0.5% TS431xCT A3 TO-92 2Kpcs / Ammo Equivalent Full Range Temp. Coefficient: 50ppm/ C TS431xCT A3G TO-92 2Kpcs / Ammo Programmable Output Voltage up to 36V TS431xCX RF SOT-23 3Kpcs / 7 Reel Fast Turn-On Response Sink Current Capability of 1~100mA TS431xCX RFG SOT-23 3Kpcs / 7 Reel Low Dynamic Output Impedance: 0.2 TS431xCY RM SOT-89 1Kpcs / 7 Reel Low Output Noise TS431xCY RMG SOT-89 1Kpcs / 7 Reel TS431xCS RL SOP-8 2.5Kpcs / 13 Reel Block Diagram TS431xCS RLG SOP-8 2.5Kpcs / 13 Reel Note: Where xx denotes voltage tolerance Blank: 2%, A: 1%, B: 0.5% G denotes for Halogen free products o Absolute Maximum Rating (Ta = 25 C unless otherwise noted) Parameter Symbol Limit Unit Cathode Voltage (Note 1) V 37 V KA Continuous Cathode Current Range I -100 ~ +150 mA K Reference Input Current Range I -0.05 ~ +10 mA REF TO-92 0.625 P W Power Dissipation S OT-23 0.30 D SOT-89 / SOP-8 0.50 o Junction Temperature T +150 C J o Operating Temperature Range T 0 ~ +70 C OPER o Storage Temperature Range T -65 ~ +150 C STG Note 1: Voltage values are with respect to the anode terminal unless otherwise noted. 1/13 Version: F07 TS431 Adjustable Precision Shunt Regulator Recommend Operating Condition Parameter Symbol Limit Unit Cathode Voltage (Note 1) V Ref ~ 36 V KA Continuous Cathode Current Range I 1 ~ 100 mA K Recommend Operating Condition Parameter Symbol Test Conditions Min Typ Max Unit TS431 2.446 2.550 V =V , I =10mA (Figure 1) KA REF K Reference voltage TS431A V 2.470 2.495 2.520 V REF o Ta=25 C TS431B 2.483 2.507 Deviation of reference input V = V , I =10mA (Figure 1) KA REF K V -- 3 17 mV REF voltage Ta= full range Radio of change in Vref to V I =10mA, V = 10V to V -- -1.4 -2.7 REF KA KA REF mV/V change in cathode Voltage /V V = 36V to 10V (Figure 2) -- -1.0 -2.0 KA KA R1=10K, R2= , I =10mA KA Reference Input current I -- 0.7 4.0 uA REF Ta= full range (Figure 2) Deviation of reference input R1=10K, R2= , I =10mA KA I -- 0.4 1.2 uA REF current, over temp. Ta= full range (Figure 2) V =0V (Figure 3), V =36V -- -- 1.0 uA REF KA V =0V (Figure 3), V =36V REF KA Off-state Cathode Current I (off) KA T =-25C~125C -- -- 30 uA J (Value is defined by design) f<1KHz, V = V KA REF Dynamic Output Impedance Z -- 0.22 0.5 KA I =1mA to 100mA (Figure 1) KA Minimum operating cathode I (min) V = V (Figure 1) -- 0.4 0.6 mA KA KA REF current * The deviation parameters V and I are defined as difference between the maximum value and minimum value REF REF obtained over the full operating ambient temperature range that applied. * The average temperature coefficient of the reference input voltage, V is defined as: REF Where: T2-T1 = full temperature change. V can be positive or negative depending on whether the slope is positive or negative. REF o o o o Example: Maximum V =2.496V at 30 C, minimum V =2.492V at 0 C, V =2.495V at 25 C, T=70 C REF REF REF 6 o o V = 4mV / 2495mV * 10 / 70 C 23ppm/ C REF Because minimum V occurs at the lower temperature, the coefficient is positive. REF * The dynamic impedance ZKA is defined as: Z = V / I KA KA KA * When the device operating with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is given by: Z = v / i Z * ( 1 + R1 / R2) KA KA 2/13 Version: F07