sot-23 encapsulate adjustable reference source cj431 k adjustable accurate reference source device descripsion the cj431 k is a three-terminal ad justable shunt regulator offering excellent temperature stability . this device has a typical dynamic output impedance of 0.2 ? . the device can be used as a replacement for zener diodes in many applications. features z the output voltage c an be adjusted to 36v z low dynamic output impedance, its typical value is 0.2 ? z trapping current capability is 1 to 100ma z low output noise voltage z fast on -state response z the effective temperature compensation in the working range of full temperature z the typical value of the equivalent temperature factor in the whole temperature scope is 50 ppm/ application z shunt regulator z high-current shunt regulator z precision current limiter absolute maximum ratings (operating temperat ure range applies unless otherwise specified) paramete r symbol value unit cathode voltage v ka 37 v cathode current range (continuous) i ka -100~+150 ma reference lnput cur r ent range iref 0.05~+10 ma power dissipation p d 300 mw operating ambient t emperature range t opr -40 ~ +85 storage t emperature range tstg -65~+150 sot-23 1. reference 2. cathode 3. anode z esd protected up to 2kv operating junction t emperature t j 150 thermal resistance from junction r ja 417 /w to ambient 1 of 2 sales@zpsemi.com www.zpsemi.com c j 4 3 1 k g , apr ,2013
electrical characteristics (t a =25 unless otherwise specified) parameter symbol test conditions min typ max unit reference lnput voltage (fig.1) v ref v ka =v ref , i ka =10ma 2.4 4 5 2.5 45 v deviation of r eference i nput voltage over t emperature (note) (fig.1) v ref /t v ka =v ref , i ka =10ma t min t a t max 4.5 17 mv v ka =10v~v ref -1.0 -2.7 mv/v ratio of change in reference lnput voltage to the c hange in cathode voltage (fig.2) v ref /v ka i ka =10ma v ka =36v~ 10v -0.5 -2.0 mv/v reference lnput current (fig.2) l ref i ka = 10ma,r 1 =10 k ? r 2 = 1.5 4 a deviation of reference lnput current over full temperature range (fig.2) l ref /t l ka =10ma, r 1 =10 k ? r 2 = t a =full temperature 0.4 1.2 a minimum c athode c urrent for regulation (fig.1) i ka(min) v ka =v ref 0.45 1.0 ma off-state c athode current (fig.3) i ka(off) v ka = 40 v,v ref =0 0.05 0.5 a dynamic lmpedance z ka v ka =v ref, l ka =1 to 100ma f 1.0 k hz 0.15 0.5 ? note: t min =0 ,t max =+70 classification r i v ref rank 0 . 5% 1% range 2.48 2 -2.5 08 2.47-2. 52 2 of 2 sales@zpsemi.com www.zpsemi.com c j 4 3 1 k g , apr ,2013
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