sot-23 encapsulate adjustable reference source cj431 adjustable accurate reference source device descripsion the cj431 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 storage temperature range tstg -65~+150 sot-23 1. reference 2. cathode 3. anode operating junction t emperature t j 150 operating ambient t emperature range t opr 0~ + 70 thermal resistance from junction to ambient r ja 417 /w 1 of 2 sales@zpsemi.com www.zpsemi.com cj431 g , apr ,2013
electrical characteristics (t a =25 unless otherwise specified) parameter symbol test condition s min typ max unit reference i nput v oltage (fig.1) v ref v ka =v ref , i ka =10ma 2.450 2.5 2.550 v deviation of reference input v oltage o ver temperature (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 o f c hange in r eference i nput v oltage to the change in c athode v oltage (fig.2) v ref /v ka i ka =10ma v ka =36v~ 10v -0.5 -2.0 mv/v reference i nput c urrent (fig.2) l ref i ka = 10ma,r 1 =10 k ? r 2 = 1.5 4 a deviation of r eference i nput c urrent o ver f ull t emperature r ange (fig.2) l ref /t l ka =10ma, r 1 =10 k ? r 2 = t a =full temperature 0.4 1.2 a minimum cathode current for r egulation (fig.1) i ka(min) v ka =v ref 0.45 1.0 ma off-state cathode current (fig.3) i ka(off) v ka =36v,v ref =0 0.05 1.0 a dynamic i mpedance 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 2.487-2.51 3 2.475-2. 525 2 of 2 sales@zpsemi.com www.zpsemi.com cj431 g , apr ,2013
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