advanced power electronics corp. AP431 adjustable precision shunt regulator features descriptioon low voltage operation (2.5v) adjustable output voltage v 0 =v ref to 18v wide operating current range 0.4ma to 100ma low dynamic output impedance 0.5 max. esd rating is 5.5kv(per mil-std-883d). halogen free product applications linear regulators adjustable supplies switching power supplies battery operated computers instrumentation computer disk drives ordering / package information data and specifications subject to change without notice 1 20130522v3.1 typical application the AP431 is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal stability over applicable temperature ranges. the output voltage can be set to any value between v ref (approximately 2.5 v) to 18v with two external resistors (see application circuit). this device has a typical output impedance of 0.2 . active output circuitry provides a very sharp turn on characteristic, making this device excel lent replacement for zener diodes in many applications. the AP431 is characterized for operation from 0 o c to 105 o c, and four package options (sot-23, sot-89, so-8 and to-92) allow the designer the opportunity to select the proper package for their application. package type n : sot-23 t : to-92 g : sot-89 m : so-8 AP431x 2 3 1 sot-23 (n type) AP431n cathode ref anode (top view) ( top view ) 1 2 3 4 8 7 6 5 anode so-8 anode cathode anode nc anode ref nc 3 2 1 ref anode cathode (top view) to-92 (t)
advanced power electronics corp. AP431 absolute maximum ratings cathode voltage (v ka ) ------------------------------------ - 18v continuous cathode current (i ka ) --------------------- - 150ma reference input current (i ref ) -------------------------- - 10ma power dissipation (p d ) --------------------------------------------- sot-23 ------- - 0.3w sot-89 ------- - 0.625w so-8 ---------- - 1.25w to-92 --------- - 0.64w storage temperature range (t st ) -------------------- - -65 to +150c junction temperature (t j ) ------------------------------- - +125c sot-23 ------- - 336c/w sot-89 ------- - 160c/w so-8 ---------- - 80c/w to-92 --------- - 156c/w lead temperature (soldering) 10 seconds (t lead ) 260c electrical specifications (t a =25 o c, unless otherwise specified) parameter sym test condition min typ max units reference voltage (test circuit 1) v ref v ka = v ref , i ka = 10ma 2.47 2.495 2.52 v v ka = v ref , i ka = 10ma, t a = full range r1 = 10k , r2 = , i ka = 10ma r1 = 10k , r2 = , i ka = 10ma t a = full range minimum cathode current for regulation (test circuit 1) i ka(min) v ka = v ref - 0.4 1 ma v ka = 18v, v ref = 0v v ka = v ref , i ka = 1ma ~ 100ma frequency < 1khz mv off-state cathode current (test circuit 3) reference input current (test circuit 2) i ref -24 4 2 ua 1.2 ua mv/v ua 0.5 - 0.4 25 1 dynamic impedance (test circuit 1) - 0.2 i ka(off) - 0.1 thermal resistance from junction to ambient (rth ja ) i ka = 10ma, v ka =10v -v ref deviation of reference input voltage over full temperature range (test circuit 1) v ref(dev) deviation of reference current over full temperature range (test circuit 2) i ref(dev) -2.7 - -1.4 ratio of change in reference voltage to the change in cathode voltage (test circuit 2) v ref v ka ka z
advanced power electronics corp. AP431 block diagram test circuit (1): v ka = v ref (2): v ka > v ref (3): off state current symbol 3 cathode (k) ref (r) anode (a) vin v ref v ka i ka vin v ka i ka (off) vin v ref r1 r2 i ref v ka = v ref x (1+r1/r2) + i ref x r1 i ka v ka
advanced power electronics corp. AP431 typical performance characteristics cathode current vs. cathode voltage reference voltage vs. reference input current vs. cathode current vs. cathode voltage 4 junction temperature junction temperature
advanced power electronics corp. AP431 marking information sot-23 to-92 so-8 sot-89 5 431t ywws date code : ss ss:2004,2008,2012? ss :2003,2007,2011? s s:2002,2006,2010? ss :2001,2005,2009? r1ss part number : r1 part number date code (ywws) y : last digit of the year ww : weak s : squence 431m ywwsss part numbe r date code (ywwsss) y last digit of the year ww week sss sequence package code 431g part number ywws date code (ywws) y:year ww week s sequence package code
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