TS432B

TS432/432A/432B Adjustable Precision Shunt Regulator Sink Current Capability up to 100mA General Description The TS432/432A/432B is a three-terminal adjustable shunt regulator with specified thermal stability. The output voltage may be set to any value between Vref (approximately 1.24V) and 18V with two external resistors. The TS432/432A/432B has a typical output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TS432/432A/432B excellent replacement for zener diode in many applications. This series is offered in 3-pin TO-92, SOT-89, SOT-23 and 5-pin SOT-25 package. Features Precision Reference Voltage TS432 1.24V±2% TS432A 1.24V±1% TS432B 1.24V±0.5% Minimum Cathode Current for regulation: 150uA(typ) Equivalent Full Range Temp. Coefficient: 50ppm/ C Programmable Output Voltage up to 18V Fast Turn-On Response Sink Current Capability of 1.0 to 100 mA Low Dynamic Output Impedance: 0.2Ω Low Output Noise o Standard Application Ordering Information Part No. TS432xCT TS432xCY TS432xCX TS432xCX5 Note: Where x denotes voltage tolerance. Blank: ±2% A: ±1% B: ±0.5% -20 ~ +85 C o Block Diagram Operating Temp. (Ambient) Package TO-92 SOT-89 SOT-23 SOT-25 Pin Assignment Pin No. TS432/A/BCT 1 2 3 Pin TS432/A/BCX5 4 5 3 1, 2 TS432/A/BCY 1 2 3 TS432/A/BCX 1 3 2 Description Reference Anode Cathode Non connect 2003/12 rev. A TS432/A/B 1-7 Absolute Maximum Rating Cathode Voltage (Note 1) Continuous Cathode Current Range Reference Input Current Range Power Dissipation (Note 2, 3) TO-92 TO-89 SOT-23 / SOT-25 Operating Junction Temperature Range Storage Temperature Range Note 2: Tj Max = 150 C Note 3: Rating apply to ambient temperature at 25 C o o Vka Ik Iref 20 -10 ~ 200 10 0.625 V mA mA Pd 0.5 0.3 W o o Tj TSTG 0 ~ +125 -65 ~ +150 C C Note 1: Voltage values are with respect to the anode terminal unless otherwise noted. Recommend Operating Condition Cathode Voltage Range Cathode Current Range (for regulation) Vka Ik Ref ~ 18 1 ~ 100 V mA Electrical Characteristics (Ta=25 C, unless otherwise specified.) Parameter Reference voltage TS432 TS432A TS432B Deviation of reference input voltage, over temp. (Note 4) Reference Input current Radio of change in Vref to change in cathode Voltage Deviation of reference input current, over temp. Minimum operating cathode current Off-state Cathode Current Dynamic Output Impedance Vref Ta = full range Vka =Vref, Ik=10mA (Figure 1) R1=10KΩ, R2= ∞ , Ika=10mA (Figure 2) Ika=10mA, Vka = 18V to Vref (Figure 2) Ta= full range Iref(DEV) R1=10KΩ, R2= ∞ , Ika=10mA (Figure 2) Ika(min) Ioff |Zka| Vka=Vref (Figure 1) Vref=0V (Figure 3) f