FP0030 doc.# dsfp-FP0030 a072312 features ? up to 20v input voltage protection ? low on-resistance - 6.5 typical ? fast switching speed ? effectively, a simple two terminal device ? no external power supplies needed applications ? ethernet system protection ? resettable fuse ? high side switch ? data acquisition general description the supertex FP0030 is a 20v current limiting protection device. it is designed to protect ethernet systems from high transient voltages. the FP0030 can be considered as a normally closed switch with a typical switch resistance of 6.5?. the device starts to turn off when the voltage drop across the two terminals exceeds a nominal value of 1.5v. in the off state, the FP0030 can withstand up to 20v across its terminals. a small amount of current, typical 800a is allowed to fow through the device. the FP0030 can also be used as a resettable fuse to protect power lines against output short circuit conditions. the FP0030 is available in a 3-lead sot-23 package. low voltage protection switch typical application circuit ethernet port FP0030 FP0030 data line 2 data line 1 3.3v 3.3v 3.3v 3.3v supertex inc. supertex inc. www .supertex.com
2 FP0030 doc.# dsfp-FP0030 a072312 absolute maximum ratings parameter value v a-b , differential voltage drop 0 to 22v maximum junction temperature +125c storage temperature range -65 to +150c power dissipation, t a @25c 360mw 1 absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditions is not implied. continuous operation of the device at the absolute rating level may affect device reliability. all voltages are referenced to device ground. note: 1. mounted on fr4 board, 25mm x 25mm x 1.57mm. ordering information part number package packing FP0030k1-g 3-lead sot-23 3000/reel -g indicates package is rohs compliant (green) sot-23 (k1) sot-23 (k1) f03w w = code for week sealed = ?green? packaging product marking package may or may not include the following marks: si or sym parameter min typ max units conditions bv a-b differential input voltage range from a to b 20 - - v i a-b = 2.0ma r sw switch on-resistance from a to b - 6.5 8.5 i a-b = 50ma, v a or v b = 0v v trip v a-b trip point to turn off - 1.5 - v --- v off switch turn off voltage - 3.2 - v i a-b = 1.0ma i a-b(off) switch off current - 800 1500 a v a-b = 15v i peak peak switching current - 155 - ma --- t off turn off time - 30 60 ns see figure 1 t on turn on time - 1.0 2.0 s see figure 2 c sw(on) switch on-capacitance from a to b or b to a - 32 - pf sw = on c sw(off) switch off-capacitance from a to b or b to a - 11 - pf v sw = 10v t j operating junction temperature -40 - +125 o c --- electrical characteristics (t j = 25 o c unless otherwise specifed) sub b a pin confguration typical thermal resistance package ja 3-lead sot-23 203 o c/w supertex inc. www .supertex.com
3 FP0030 doc.# dsfp-FP0030 a072312 typical i-v characteristics -v off -v trip +15v i a-b = +800a r sw = 6.5 i a-b +i peak -i peak +v trip +v off -1.0ma +1.0ma i a-b = -800a -15v block diagram switch control a b supertex inc. www .supertex.com
4 FP0030 doc.# dsfp-FP0030 a072312 pin description pin name description a switch terminal a sub internally connect to the back of the die. leave foating. do not ground! b switch terminal b functional description the supertex FP0030 can be considered as a normally closed switch controlled by a switch control (please refer to the block diagram). the switch control monitors the voltage drop across terminals a and b. if the voltage difference is greater than 1.5v, the switch will start to open. once in the open state, only a small amount of current, typical 800a, fows through the switch to detect if the high voltage is still present or not. the switch will not close until the voltage across terminal a and b drops below 1.5v. test circuits for t on and t off 10 b a FP0030 t x +10v 0v 500ns pulse width 100 b a FP0030 t x +10v 0v 2.0ms pulse width 1.0v 2.0v 10% t off 10v 0v a b 2.0v 10% t on 10v 0v 1.0v 0v a b figure 1: t off test circuit figure 2: t on test circuit supertex inc. www .supertex.com
5 (the package drawing(s) in this data sheet may not refect the most current specifcations. for the latest package outline information go to http://www.supertex.com/packaging.html .) FP0030 doc.# dsfp-FP0030 a072312 3-lead to-236ab (sot-23) package outline (k1) 2.90x1.30mm body, 1.12mm height (max), 1.90mm pitch symbol a a1 a2 b d e e1 e e1 l l1 dimension (mm) min 0.89 0.01 0.88 0.30 2.80 2.10 1.20 0.95 bsc 1.90 bsc 0.20 ? 0.54 ref 0 o nom - - 0.95 - 2.90 - 1.30 0.50 - max 1.12 0.10 1.02 0.50 3.04 2.64 1.40 0.60 8 o jedec registration to-236, variation ab, issue h, jan. 1999. ? this dimension differs from the jedec drawing. drawings not to scale. supertex doc.#: dspd-3to236abk1, version c041309. vi ew b vi ew a - a side v iew t op vi ew v iew b gauge plane seating plane 0.25 l1 l e1 e d 3 1 2 e e1 b a a seating plane a a2 a1 supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such appl ications unless it receives an adequate ?product liability indemnification insurance agreement.? supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. no responsibility is assumed for possible omissions and inaccuracies. circuitry and specifications are subject to change without notice. for the latest product specifications refer to the supertex inc. (website: http//www .supertex.com) ?2012 supertex inc. all rights reserved. unauthorized use or reproduction is prohibited. supertex inc. 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com
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