rt9816 ? ds9816-06 march 2013 www.richtek.com 1 ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. features z z z z z internally fixed threshold 1.2v to 5v in 0.1v step z z z z z high accuracy 1.5% z z z z z low supply current 3 a z z z z z no external components required z z z z z quick reset within 20 s z z z z z built-in recovery delay include 0ms, 55ms, 220ms, 450ms options z z z z z 800ns glitch immunity of manual reset input z z z z z low functional supply voltage 0.9v z z z z z n-channel open-drain output z z z z z small sc-82 package z z z z z rohs compliant and 100% lead (pb)-free pin configurations applications z computers z controllers z intelligent instruments z critical p and c power monitoring z portable/battery-powered equipment micro-power voltage detectors with manual reset ordering information general description the rt9816 is a micro-power voltage detector with deglitched manual reset input supervising the power supply voltage level for microprocessors ( p) or digital systems. it provides internally fixed threshold levels with 0.1v per step ranging from 1.2v to 5v, which covers most digital applications. it features low supply current of 3 a. the rt9816 performs supervisory function by sending out a reset signal whenever the v dd voltage falls below a preset threshold level. this reset signal will last the whole period before v dd recovering. once v dd recovered upcrossing the threshold level, the reset signal will be released after a certain delay time. to pull reset signal low manually, just pull the manual reset input (mr) below the specified v il level. rt9816 is provided in sc-82 package. (top view) sc-82 vdd gnd 3 2 4 reset/ reset mr rt9816 package type y : sc-82 lead plating system p : pb free g : green (halogen free and pb free) threshold voltage 12 : 1.2v 13 : 1.3v : 49 : 4.9v 50 : 5.0v - reset active timeout period a = 0ms (reset) b = 55ms (reset) c = 220ms (reset) d = 450ms (reset) e = 0ms (reset) f = 55ms (reset) g = 220ms (reset) h = 450ms (reset) note : richtek products are : ` rohs compliant and compatible with the current require- ments of ipc/jedec j-std-020. ` suitable for use in snpb or pb-free soldering processes. marking information for marking information, contact our sales representative directly or through a richtek distributor located in your area.
rt9816 2 ds9816-06 march 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. function block diagram typical application circuit functional pin description pin name pin function gnd ground. reset active low open-drain reset output. reset active high open-drain reset output. mr manual reset. vdd supply voltage input. rt9816 vdd gnd mr reset/ reset 100k pull up vdd up reset/ reset timer vset threshold voltage setting por power on reset cmp n mos gnd vdd mr reset/ reset
rt9816 3 ds9816-06 march 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. absolute maximum ratings (note 1) z terminal voltage (with respect to gnd) v dd ------------------------------------------------------------------------------------------------------------------------ ? 0.3v to 6.0v z all other inputs -------------------------------------------------------------------------------------------------------- ? 0.3v to v dd +0.3v z input current, i vdd ----------------------------------------------------------------------------------------------------- 20ma z power dissipation, pd @ t a = 25 c sc-82 -------------------------------------------------------------------------------------------------------------------- 0.25w z package thermal resistance (note 2) sc-82, ja --------------------------------------------------------------------------------------------------------------- 400 c z lead temperature (soldering, 10se c.) ---------------------------------------------------------------------------- 260 c z storage temperature range ---------------------------------------------------------------------------------------- ? 65 c to 125 c z esd susceptibility (note 3) hbm (human body model) ------------------------------------------------------------------------------------------ 2kv electrical characteristics (v dd = 3v, unless otherwise specified) parameter symbol test conditions min typ max unit operating v dd (v out ) range v dd 0.9 -- 6 v supply current i dd v th = 3v , v dd = 4.5v t a = 27 c -- 3 8 a reset threshold v th t a = 27 c -- 1.2 to 5.0 -- v v il t a = 27 c, v th > 1.2v -- -- 0.25v dd mr input threshold v ih t a = 27 c, v th > 1.2v 0.7v dd -- -- v mr glitch rejection -- 800 -- ns threshold voltage accuracy v th t a = 27 c ? 1.5 -- 1.5 % v dd drop to reset delay t rd drop = v th -125mv -- 20 -- s rt9816a/e -- 0 -- rt9816b/f 35 55 75 rt9816c/g 143 220 297 reset active time out period rt9816d/h t rp v dd 1.02 v th 292 450 608 ms reset output voltage low v ol 3 = v dd < v th i sin k >3.5ma -- -- 0.4 v hysteresis width v hys -- 0.01v th -- v recommended operating conditions (note 4) z junction temperature range ---------------------------------------------------------------------------------------- ? 40 c to 125 c z ambient temperature range ---------------------------------------------------------------------------------------- ? 40 c to 85 c
rt9816 4 ds9816-06 march 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. note 1. stresses beyond those listed ? absolute maximum ratings ? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions may affect device reliability. note 2. ja is measured at t a = 25 c on a low effective thermal conductivity single-layer test board per jedec 51-3. note 3. devices are esd sensitive. handling precaution is recommended. note 4. the device is not guaranteed to function outside its operating conditions.
rt9816 5 ds9816-06 march 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. typical operating characteristics nch driver output current vs. v ds 0 20 40 60 80 100 120 012345 v ds (v) output current (ma ) rt9816a-45 v dd = 4.4v = 4.0v = 3.5v = 3.0v = 2.5v = 2.0v = 1.5v nch driver output current vs. v ds 0 10 20 30 40 50 60 0 0.5 1 1.5 2 2.5 3 3.5 v ds (v) output current (ma ) v dd = 2.0v v dd = 1.5v rt9816c-30 v dd = 2.8v v dd = 2.5v supply current vs. input voltage 0 1 2 3 4 5 6 0123456 input voltage (v) supply current ( a ) rt9816a-12 80 c 25 c -30 c supply current vs. input voltage 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0123456 input voltage (v) supply current ( a ) rt9816c-30 80 c 25 c -30 c output voltage vs. input voltage 0 1 2 3 4 5 6 7 0123456 input voltage (v) output voltage (v) 4.5v 1.2v rt9816 nch driver output current vs. v ds 0.0 0.4 0.8 1.2 1.6 2.0 2.4 0 0.3 0.6 0.9 1.2 1.5 v ds (v) output current (ma ) v dd = 1.0v v dd = 1.1v rt9816a-12
rt9816 6 ds9816-06 march 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. supply current vs. input voltage 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0123456 input voltage (v) supply current ( a ) rt9816a-45 80 c 25 c -30 c power down reset delay vs. temperature 0 2 4 6 8 10 12 14 -50-250 255075100125 temperature (c) power down reset delay (s ) rt9816a-12 v drop = 200mv v drop = 150mv v drop = 250mv power down reset delay vs. temperature 0 5 10 15 20 25 30 35 40 45 -50 -25 0 25 50 75 100 125 temperature (c) power down reset delay (s ) rt9816c-30 v drop = 200mv v drop = 150mv v drop = 250mv power down reset delay vs. temperature 0 5 10 15 20 25 30 35 40 45 -50 -25 0 25 50 75 100 125 temperature (c) power down reset delay (s) 1 rt9816a-45 v drop = 200mv v drop = 150mv v drop = 250mv reset threshold deviation vs. temperature 1 2 3 4 5 6 -50 -25 0 25 50 75 100 125 temperature (c) reset threshold (v) 5.0v 1.2v 4.2v 2.2v 4.5v rt9816 nch driver sink current vs. input voltage 0 5 10 15 20 25 30 35 40 00.511.522.533.5 input voltage (v) sink current i sink (ma) rt9816c-30, v ds = 0.5v 80 c 25 c -30 c
rt9816 7 ds9816-06 march 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. nch driver output current vs. input voltage 0 10 20 30 40 50 60 0123456 input voltage (v) nch driver output current (ma) 1 rt9816g-31 v ds = 0.5v 80 c 25 c -30 c nch driver output current vs. v ds 0 20 40 60 80 100 120 140 160 0123456 v ds (v) nch driver output current (ma) 1 v dd = 6.0v = 5.5v = 5.0v = 4.5v = 4.0v = 3.5v rt9816g-31 output delay time vs. load capacitance 0.01 0.1 1 10 100 1000 0.0001 0.0010 0.0100 0.1000 1.0000 load capacitance (f) output delay time (ms ) v th = 1.2v v th = 4.5v power up reset time-out vs. temperature 0 20 40 60 80 100 -50 -25 0 25 50 75 100 125 temperature (c) power up reset time-out (s) v th = 5.0v v th = 4.5v rt9816a power up reset time-out vs. temperature 0 100 200 300 400 500 -50 -25 0 25 50 75 100 125 temperature (c) power up reset time-out (ms) v th = 2.9v v th = 3.0v rt9816c nch driver sink current vs. input voltage 0 10 20 30 40 50 012345 input voltage (v) sink current i sink (ma) rt9816a-45, v ds = 0.5v 80 c 25 c -30 c
rt9816 8 ds9816-06 march 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. output voltage vs. input voltage 0 1 2 3 4 5 6 7 0123456 input voltage (v) output voltage (v) rt9816g-31 power down reset time-out vs. temperature 0 100 200 300 400 500 -50 -25 0 25 50 75 100 125 temperature (c) power down reset time-out (ms ) rt9816g-31 power down reset time-out vs. temperature 0 5 10 15 20 25 30 -50 -25 0 25 50 75 100 125 temperature (c) power down reset time-out (s ) v drop = 200mv v drop = 150mv v drop = 250mv rt9816g-31
rt9816 9 ds9816-06 march 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. application information multiple supplies mainly, the pull-up connected to the rt9816 will connect to the supply voltage that is being monitored at the ic ? s vcc pin. however, some systems may use the open-drain output to level-shift from the monitored supply to reset circuitry powered by some other supply. benefits of highly accurate reset threshold most p supervisor ics have reset threshold voltages between 1% and 1.5% below the value of nominal supply voltages. this ensures a reset will not occur within 1% of the nominal supply, but will occur when the supply is 1.5% below nominal.
rt9816 10 ds9816-06 march 2013 www.richtek.com richtek technology corporation 5f, no. 20, taiyuen street, chupei city hsinchu, taiwan, r.o.c. tel: (8863)5526789 richtek products are sold by description only. richtek reserves the right to change the circuitry and/or specifications without notice at any time. customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a richtek product. information furnish ed by richtek is believed to be accurate and reliable. however, no responsibility is assumed by richtek or its subsidiaries for its use; nor for any infringeme nts of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of r ichtek or its subsidiaries. outline dimension dimensions in millimeters dimensions in inches symbol min max min max a 0.800 1.100 0.031 0.043 a1 0.000 0.100 0.000 0.004 b 1.150 1.350 0.045 0.053 b 0.150 0.400 0.006 0.016 b1 0.350 0.500 0.014 0.020 c 1.800 2.450 0.071 0.096 d 1.800 2.200 0.071 0.087 e 1.300 0.051 h 0.080 0.260 0.003 0.010 l 0.200 0.460 0.008 0.018 sc - 82 surface mount package e d a c b a1 l b b1 h e
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