cat808 low-power precision voltage detector features ? ultra low current consumption 2.4 a ? accurate voltage detection threshold ? fine voltage detection threshold resolution ? open drain output (active low) ? industrial temperature range -40c to +85c ? 5-pin tsot-23 rohs compliant package applications ? battery-powered systems ? power supply monitoring ? handheld and portable equipment ? processor supervisor reset description the cat808 is a high-precision voltage detector designed for monitoring single cell and multi-cell batteries. voltage detection thresholds between 2.0 v and 3.5 v are provided with 0.1 v resolution and 3.0% accuracy. the cat808 open-drain output is active low until the v dd voltage exceeds the detection threshold. a low hysteresis is built into the device to minimize output ?chatter?, while v dd passes through the detection threshold, and the output transitions high. after the cat808 asserts the output high condition, it continues to monitor v dd until it drops below the detection threshold, when the output goes low until v dd once again exceeds the detection threshold. for ordering information details, see page 6. pin configuration typical application thin sot-23 5-lead out shdn gnd in dc-dc converter out v dd gnd battery voltage cat808 10k ? nc gnd 2 3 1 nc 5 4 out v dd note: the value of the pull-up resistor is not critical ? 2010 scillc. all rights reserved. 1 doc. no. md-3024 rev. f characteristics subject to change without notice
cat808 absolute maximum ratings (1) parameters ratings units temperature under bias -55 to +125 oc storage temperature -65 to +150 oc voltage on any pin with respect to gnd (2)(3) -2.0 to v dd + 2.0 v v dd with respect to gnd -2.0 to 7.0 v lead soldering temperature (10 seconds) +300 oc power dissipation 250 mw recommended operating conditions parameters ratings units v dd +1.2 to +6.0 v operating temperature range -40 to +85 oc dc electrical characteristics t a = -40oc to +85oc, v dd = 1.2v to 6.0v symbol parameter conditions min typ. max units cat808nxxx- 25 2.43 2.5 2.57 cat808nxxx- 27 2.62 2.7 2.78 v cat808nxxx- 32 3.12 3.2 3.28 v det detection voltage cat808nxxx- 35 3.42 3.5 3.58 v dd = 4.0 v - 2.4 5 v dd = 5.0 v - 3.5 7 i dd current consumption v dd = 6.0 v - 5 10 a v dd =1.2 v 0.6 1.4 - i out output sink current v ds = 0.5 v v dd =2.4 v 2.9 5 - ma i leak output leakage current v ds = 5.0 v, v dd = 5.0 v - - 1 a t phl/lh response time ? - - 60 s v det t a v det (typ) detection voltage temperature coefficient (4) - 10 100 ppm/oc notes: (1) stresses above those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress rat ings only and functional operation of the devices at these or any other conditions outside of those listed in the operational sectio ns of this specification is not implied. exposure to any absolute maximum rating for extended periods may affect device performance and reliability. (2) the minimum dc input voltage is -0.5 v. during transitions, inputs may undershoot to -2.0 v for periods of less than 20 ns . maximum dc voltage on output pins is v cc +0.5 v, which may overshoot to v cc +2.0 v for periods of less than 20 ns. (3) latch-up protection is provided for stresses up to 100 ma on all pins from -1 v to v cc +1 v. (4) the temperature change ratio in the detection voltage [ppm/c] is calculated by using the following equation: ]c/oppm[000,000,1 )typ(vt det a det ? v doc. no. md-3024 rev. f 2 ? 2010 scillc. all rights reserved. characteristics subject to change without notice
cat808 operation ? voltage detector the cat808 has an active low output that asserts (pulls low) when the supply voltage drops below the detection threshold voltage (v det ). the open-drain output requires an external pull-up resistor between the output pin and the supply voltage (as shown in the typical application diagram). on power-up, out is held active low until the supply voltage (v dd ) rises above v det . while v dd is above v det , out stays high until v dd drops below v det , then out once again goes low. block diagram voltage reference out v dd timing diagram t plh t phl v det(min) v det(min) v det(max) v det v det(max) v det out slews with v dd gnd v oh v dd * out * voltage of v dd below 1 volt will not be able to maintain low output. pin functions pin function v dd voltage input and power supply gnd ground pin out active low open drain output nc no connect, the pin is electrically open ? 2010 scillc. all rights reserved. 3 doc. no. md-3024 rev. f characteristics subject to change without notice
cat808 typical electrical operating characteristics typical values at t a = 25 c. v dd supply current vs. v dd supply voltage v det detection voltage vs. temperature 2.695 2.7 2.705 2.71 -40 -5 30 65 100 temperature (oc) v det (v) 0 1 2 3 4 5 23456 supply voltage (v) supply current ( a) response time vs. load capacitance i out transistor output current vs. v dd supply voltage 0.00 2.00 4.00 6.00 8.00 10.00 1.00 1.50 2.00 2.50 v dd (v) i out (ma) 0.01 0.1 1 10 100 0.000001 0.00001 0.0001 0.001 0.01 0.1 load capacitance [nf] response time [ms] 0.001 0.01 0.1 1 10 100 -40oc t plh +25oc +90oc t phl doc. no. md-3024 rev. f 4 ? 2010 scillc. all rights reserved. characteristics subject to change without notice
cat808 package outline drawings tsot-23 5-lead (td) (1) (2) e1 e a2 a1 e b d c a top view side view end view l1 l l2 symbol min nom max a1 . 0 a1 0.01 0.05 0.10 a2 0.80 0.87 0.90 b 0.30 0.45 c 0.12 0.15 0.20 d2 . 9 0 b s c e2 . 8 0 b s c e1 1.60 bsc e0 . 9 5 t y p l 0.30 0.40 0.50 l1 0.60 ref l2 0.25 bsc 0o 8o 0 characteristics subject to change without notice notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec specification mo-193. ? 2010 scillc. all rights reserved. 5 doc. no. md-3024 rev. f
cat808 example of ordering information temper atur e r ange i = industrial (-40c to 85c) prefix device # suffix product number 808n optional company id package td: tsot-23-5 lead finish g: nipdau voltage detection level -25: 2.5v -35: 3.5v 808n td i -27 cat tape & reel t: tape & reel 3: 3000 reel notes: (1) all packages are rohs-compliant (lead-free, halogen-free). (2) the standard finish is nipdau. (3) the device used in the above example is a cat808ntdi-27gt3 (tsot-23-5, industrial temperature, 2.7 v detection level, nipda u, tape & reel, 3000 reel). (4) for additional detection voltage, package and temperature options, please contact your nearest on semiconductor sales offic e. ordering information orderable part number package detection voltage [v] top marking cat808ntdi-25gt3 tsot-23-5 2.50 mvym cat808ntdi-27gt3 tsot-23-5 2.70 mvym cat808ntdi-32gt3 tsot-23-5 3.20 mvym cat808ntdi-35gt3 tsot-23-5 3.50 mvym * part number is not exactly the same as the ?example of ordering information? shown above. for part numbers marked with * there are two hyphens in the orderable part number. notes: (1) ym ? year and month code. doc. no. md-3024 rev. f 6 ? 2010 scillc. all rights reserved. characteristics subject to change without notice
cat808 on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes with out further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any pa rticular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer's technical experts. sci llc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly o r indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufact ure of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information literature fulfillment: literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone: 303-675-2175 or 800-344-3860 toll free usa/canada fax: 303-675-2176 or 800-344-3867 toll free usa/canada email: orderlit@onsemi.com n. american technical support : 800-282-9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center: phone: 81-3-5773-3850 on semiconductor website: www.onsemi.com order literature: http://www.onsemi.com/orderlit for additional information, please contact your local sales representative ? 2010 scillc. all rights reserved. 7 doc. no. md-3024 rev. f characteristics subject to change without notice revision history date rev. description 7-nov-06 a initial issue 10-may-07 b update features update description update dc electrical characteristics update example of ordering information update top marking 5-nov-08 c added md ? to document number change logo and fine print to on semiconductor 17-mar-09 d update package outline drawing - sot-89 3-lead (tf) 13-jul-09 e update ordering information table 17-may-10 f update dc electrical characteristics remove sot-89 package update example of ordering information update ordering information
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