TS1431 TSC | Alldatasheet

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Technical content

Features

— Precision Reference Voltage TS1431 2.495V±2% TS1431A 2.495V±1% TS1431B 2.495V±0.5% — Equivalent Full Range Temp. Coefficient: 50ppm/ oC — Programmable Output Voltage up to 36V — Fast Turn-On Response — Sink Current Capability of 1.0 to 100 mA — Low Dynamic Output Impedance: 0.22 Ω — Low Output Noise Block Diagram

Ordering Information

Note: Where x denotes voltage tolerance. B l a n k : ± 2 % A: ±1% B : ± 0 . 5 % Part No. Operating Temp. (Ambient) Package TS1431xCT TO-92 TS1431xCX -20 ~ +85 oC SOT-23 Pin Assignment: 1. Cathode 2. Reference 3. Anode

TS1431/A/B 2-7 2003/12 rev. B Absolute Maximum Rating Cathode Voltage (Note 1) Vka 37 V Continuous Cathode Current Range Ik -100 ~ +150 mA Reference Input Current Range Iref -0.05 ~ +10 mA Power Dissipation (Note 2, 3) TO-92 S O T - 2 3 Pd 0.625 0.3 W Operating Junction Temperature Range Tj -25 ~ +125 oC Storage Temperature Range T STG -65 ~ +150 oC Note 1: Voltage values are with respect to the anode terminal unless otherwise noted. Note 2: Tj Max = 125oC Note 3: Rating apply to ambient temperature at 25 oC Recommend Operating Condition Cathode Voltage Range Vka Ref ~ 36 V Cathode Current Range (for regulation) Ik 1 ~ 100 mA

Electrical Characteristics

(Ta=25 oC, unless otherwise specified.) Parameter Symbo Test Conditions Min Typ Max Unit TS1431 TS1431A Reference voltage TS1431B Vref Vka =Vref, Ik=10mA (Figure 1) 2.446 2.470 2.483 2.495 2.545 2.520 2.507 V Deviation of reference input voltage, over temp. (Note 4) ∆Vref Ta = full range Vka =Vref, Ik=10mA (Figure 1) -- 3 17 mV Reference Input current Iref R1=10KΩ, R2= ∞, Ika=10mA (Figure 2) -- 0.7 4.0 uA Radio of change in Vref to change in cathode Voltage ∆Vref / ∆Vka Ika=10mA, Vka = 10V to Vref, Vka = 36V to 10V (Figure 2) -1.4 - 1.0 -2.7 - 2.0 mV/V Deviation of reference input current, over temp. Iref(DEV) Ta= full range R1=10KΩ, R2= ∞, Ika=10mA (Figure 2) -- 0.4 1.2 uA Minimum operating cathode current Ika(min) Vka=Vref (Figure 1) -- 0.4 0.6 mA Off-state Cathode Current Ioff Vref=0 V (Figure 3) Vka=36V -- -- 1.0 uA Dynamic Output Impedance |Zka| f<1KHz, Vka=Vref Ika=1mA to 100mA (Figure 1) -- 0.22 0.5 Ω

TS1431/A/B 3-7 2003/12 rev. B Electrical Characteristics (continued) (Ta=25 oC, unless otherwise specified.) Note 4. Deviation of reference input voltage, VDEV, is defined as the maximum deviation of t he reference over the full temperature range. The average temperature coefficient of the reference input voltage αVref is defined as: | αVref | = [ VDEV / Vref(25 oC) ] * 106 / T2 – T1…………………….. (PPM/ oC) Where: T2-T1 = full temperature change. αVref can be positive or negative depending on whether the slope is positive or negative. Example: Maximum Vref=2.496V at 30 oC, minimum Vref=2.492V at 0oC, Vref=2.495V at 25oC, ∆T=70 oC | αVref | = [ 4mV / 2495mV ] * 106 / 70oC ≈ 23ppm/oC Note 5. The dynamic output impedance, Rz, is defined as: | Zka | = ∆Vka / ∆Ika When the device is programmed with two external re sistors R1and R2 (see Figur e 2). The dynamic output impedance of the overall circuit, is defined as : Test Circuits

TS1431/A/B 4-7 2003/12 rev. B Application Examples

TS1431/A/B 5-7 2003/12 rev. B Application Examples

TS1431/A/B 6-7 2003/12 rev. B Typical Performance Characteristics

TS1431/A/B 7-7 2003/12 rev. B TO-92 Mechanical Drawing C D A B H E F G TO-92 DIMENSION MILLIMETERS INCHES DIM MIN MAX MIN MAX A 4.30 4.70 0.169 0.185 B 4.30 4.70 0.169 0.185 C 14.30(typ) 0.563(typ) D 0.43 0.49 0.017 0.019 E 2.19 2.81 0.086 0.111 F 3.30 3.70 0.130 0.146 G 2.42 2.66 0.095 0.105 H 0.37 0.43 0.015 0.017 SOT-23 Mechanical Drawing D C A E B G F SOT-23 DIMENSION MILLIMETERS INCHES DIM MIN MAX MIN MAX A 2.88 2.91 0.113 0.115 B 0.39 0.42 0.015 0.017 C 1.78 2.03 0.070 0.080 D 0.51 0.61 0.020 0.024 E 1.59 1.66 0.063 0.065 F 1.04 1.08 0.041 0.043 G 0.07 0.09 0.003 0.004