? semiconductor components industries, llc, 2012 october, 2012 ? rev. 0 1 publication order number: cat6202/d cat6202 500 ma / 13 v adjustable cmos ldo regulator description the cat6202 is a 13 v rated 500 ma cmos low dropout regulator that provides fast response time to load current and line voltage changes in an automotive environment. cat6202 features a low r on p ? channel pass element with internal control circuitry which prevents reverse current flow should the voltage at v out exceed v in as in the case of the car?s battery voltage accidentally being applied to v out . thermal protection and current limiting circuitry combine to protect the pass device against faults and abuse. current limiting is user controlled through a single resistor to ground. a fault output (flt ) provides an alert should an over ? current event or thermal shutdown occur. cat6202 comes on ? line gracefully even though it may be driving heavy capacitive loads thanks to built ? in soft ? start circuitry. its output is protected against accidental connection to voltages greater than v in and will not conduct current backwards into its supply. cat6202 is available in 8 ? pad 2 mm x 3 mm tdfn package. features ? guaranteed 500 ma continuous output current ? low dropout voltage of 250 mv typical at 500 ma ? input voltage range: 3.3 v to 13.5 v ? user adjustable output voltage ? user programmable current limit ? fault output to indicate under ? voltage, current limiting or thermal shutdown has occurred ? fault blanking: 3 ms ? v out withstands battery fault voltages of up to 14 v ? soft ? start prevents current surges ? stable with ceramic output capacitor ? 1.0% output voltage initial accuracy ? 2.0% accuracy over temperature ? thermal protection ? 8 pad tdfn package ? these devices are pb ? free, halogen free/bfr free and are rohs compliant http://onsemi.com pin connections hkc laa ym marking diagrams tdfn ? 8 (top view) vout gnd vin flt byp 1 see detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet. ordering information tdfn ? 8 vp2 suffix case 511ak ilim vadj en hkc = cat6202vp2 ? gt3 l = assembly location aa = last two digits of = assembly lot number y = production year (last digit) m = production month (1 ? 9, o, n, d) = pb ? free microdot
cat6202 http://onsemi.com 2 figure 1. cat6202 typical application figure 2. cat6202 functional block diagram vin cat6202 vadj ilim byp vout gnd 1 f 2.2 f 47 k 10 nf current sensing byp gnd en bias control power pmos enable & error amplifier over current v in v out c out flt v out r 1 r 2 v adj i lim c in c byp soft start + ? r ext v in + ? 1.25 v ref
cat6202 http://onsemi.com 3 table 1. pin function description pin no. pin name description 1 vin supply voltage input 2 flt fault indicator (active low) 3 en enable input (active high) 4 byp a capacitor between byp and gnd controls the regulator?s turn ? on speed and improves psrr 5 gnd ground reference 6 ilim current limit control pin 7 vadj output voltage adjustment 8 vout ldo output voltage table 2. absolute maximum ratings rating value unit v in , v out 0 to 16 v all other pins ? 0.3 to +6.0 v junction temperature, t j +150 c power dissipation, p d internally limited (note 1) mw storage temperature range, t s ? 65 to +150 c lead temperature (soldering, 5 sec.) 260 c esd rating (human body model) 1000 v esd rating (machine model) 350 v stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. 1. the maximum allowable power dissipation at any t a (ambient temperature) is p dmax = (t jmax ? t a ) / ja . exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. table 3. recommended operating conditions (note 2) parameter range unit v in , v out 3.3 to 13.5 v all other pins 0 to 6.0 v junction temperature range, t j ? 40 to +125 c package thermal resistance (soic), ja 235 c/w package thermal resistance (tdfn), ja 92 c/w 2. the device is not guaranteed to work outside its operating rating.
cat6202 http://onsemi.com 4 pin function vin is the supply pin for both the ldo?s operation and the load the ldo is driving. it is recommended that a 1 f ceramic bypass capacitor be placed between the v in pin and ground in close proximity to the device. when using longer connections to the power supply, c in value can be increased without limit. the operating input voltage range is from 3.3 v to 13 v. flt is an active low open ? drain output indicating one of 3 fault conditions: 1. input under ? voltage: v in is below the intended output voltage 2. over ? current. brief over ? current events are masked by a 3 ms time delay. cat6202 will limit current anytime the load tries to draw more than the maximum allowed however reporting of this event will occur only if the event lasts longer than the delay timer. events terminating before the timer reaches its full count are ignored and the timer is reset. 3. over ? temperature shutdown has occurred. en is an active high logic level input for switching the regulator?s output between on and off. a weak internal pull down assures that if en pin is left open, the circuit is disabled. byp controls the soft ? start feature for the regulator. when large capacitive loads are present at the regulator?s output, enabling the regulator will produce large current surges on the v in supply line. to reduce these surges the regulator can be turned on gently by connecting a capacitor between the byp pin and ground. the larger the capacitance value the more slowly v out approaches its programmed value. the table below gives a list of common capacitor values and their resulting turn ? on times. if the soft ? start feature is not desired, this pin should be left floating. capacitance [nf] t on [ms] 0 0.2 10 1 100 10 gnd is the ground reference for the ldo. the tdfn package center metal pad is internally connected to gnd. if electrical contact is made with this pad, it should be to gnd and/or the ground plane of the pcb. connection to the ground plane enhances thermal conductivity drawing heat out of the package and into the surrounding pcb. ilim stands for current limit and is the control input for setting the point at which the current limit is invoked. i lim is defined as the current at which v out is still within 80% of its nominal value and should not be confused with i sc , the short circuit current, measured at v out = 0 v, which is typically 100 ma greater than i lim . a resistor r ext placed between i lim and gnd selects the trip current according to a formula: i limit i limit0 current_limit_factor(clf) r ext (eq. 1) i lim0 is the built ? in minimum current limit (typically 150 ma), and clf is a numerical value (typical 30,000 volts) which relates the allowable load current to a resistance value. the value of this resistor is determined by the following equation: r ext ( ) clf(v) i lim (a) i lim0 (a) (eq. 2) it is recommended that i lim be set with at least 50%, and preferably 60%, higher than the maximum intended continuous i out . example: set i limit = 800 ma r ext ( ) 30, 000 v 0.8 a 0.15 a 47 k (eq. 3) vadj is the output voltage control pin. a resistor divider placed between vout and gnd whose center point connects to vadj sets the ldo regulator?s output voltage. typical vadj value is 1.25 v. the current through the resistor divider can be anywhere between 10 a and 1 ma. the higher this current is, the lower the noise. vout is the ldo regulator output. a small 2.2 f ceramic bypass capacitor is required between vout and ground. for better transient response, its value can be increased to 4.7 f. this capacitor should be located near the device. v out v adj 1 r 1 r 2 (eq. 4) vout is protected against short circuits and over ? temp operation by internal circuitry. in the event of an over ? current, the ldo behaves like a current source, limiting current at the output. the maximum current allowed is set by r ext , the resistor between ilim and gnd. if the load attempts to draw more than the allowed current, vout and iout decrease together and thus limit the total power delivered. vout is protected against the application of voltages greater than vin. for example, in automotive applications, if cat6202 is powering a remote load and damage occurs to a wiring harness shorting a powered line, battery + for instance, to vout, cat6202 will not be damaged by this higher voltage being applied to vout.
cat6202 http://onsemi.com 5 table 4. electrical characteristics (v in = v out + 1 v, v en = high, i out = 1 ma, c in = 1 f, c out = 2.2 f, r ext = 47 k , ambient temperature of 25 c (over recommended operating conditions unless specified otherwise). bold numbers apply for the entire junction temperature range.) symbol parameter conditions min typ max unit v in input voltage 3.3 13.5 v v out output voltage v adj 12.5 v adj adj voltage 1.238 1.250 1.262 v i adj adj input current 0.5 2.0 a tc out output voltage temp. coefficient 40 ppm/ c v r ? line line regulation v out + 1.0 < v in < 13 v ? 0.2 0.1 +0.2 %/v ? 0.4 +0.4 v r ? load load regulation i out = 1 ma to 500 ma 1 2.5 % v drop dropout voltage (note 3) i out = 500 ma 250 350 mv i gnd ground current i out = 0 ma 100 150 a i out = 500 ma 160 300 i gnd ? sd shutdown ground current v en < 0.4 v 2 a psrr power supply rejection ratio f = 1 khz, c byp = 10 nf 62 db f = 20 khz, c byp = 10 nf 52 t on turn ? on time c byp = 10 nf 700 s i sc output short circuit current v out < 0.8 v 700 800 1000 ma i lim output current limit v out = 0.8 v out (1 ma) 600 650 800 ma clf current limit factor v out < 0.8 v 24 30 36 kv t fd fault delay 1.5 3 6 ms v in ? uvlo under voltage lockout threshold 3.1 v esr r out equivalent series resistance 5 500 m enable input v hi logic high level v in = 3.3 to 13 v 2 v v lo logic low level v in = 3.3 to 13 v 0.4 v i en enable input current v en = 0.4 v 0.15 1 a v en = v in 3 5 thermal protection t sd thermal shutdown 140 c t hys thermal hysteresis 10 c 3. dropout voltage is defined as the input ? to ? output differential at which the output voltage drops 2% below its nominal value. during test, the input voltage stays always above the minimum 3.3 v. the given values are for v out = 7.5 v.
cat6202 http://onsemi.com 6 typical characteristics (shown for 7.5 v output) (v in = 8.5 v, r 1 = 5.1 k , r 2 = 1 k , c in = 1 f, c out = 2.2 f, c byp = 10 nf, r ext = 47 k , flt not connected, t a = 25 c unless otherwise specified.) i out = 500 ma i out = 1 ma figure 3. dropout characteristics figure 4. line regulation input voltage (v) input voltage (v) 14 12 10 8 6 4 2 0 0 1 2 3 4 6 7 8 14 13 12 11 10 9 8 7.30 7.35 7.40 7.45 7.50 figure 5. load regulation figure 6. adjustable voltage vs. temperature output load current (ma) temperature ( c) 500 400 300 200 100 0 7.30 7.35 7.40 7.45 7.50 125 100 75 50 25 0 ? 25 1.22 1.23 1.24 1.25 1.26 figure 7. ground current vs. load current figure 8. ground current vs. temperature output load current (ma) temperature ( c) 500 400 300 200 100 0 75 100 125 150 175 125 100 75 50 25 0 ? 25 75 100 125 150 175 output voltage (v) output voltage (v) output voltage (v) adjustable voltage (v) ground current ( a) ground current ( a) 5 v in = 8 v temp = 25 c v in = 8.5 v
cat6202 http://onsemi.com 7 typical characteristics (shown for 7.5 v output) (v in = 8.5 v, r 1 = 5.1 k , r 2 = 1 k , c in = 1 f, c out = 2.2 f, c byp = 10 nf, r ext = 47 k , flt not connected, t a = 25 c unless otherwise specified.) figure 9. output short ? circuit current vs. input voltage figure 10. ground current vs. input voltage input voltage (v) input voltage (v) 14 12 10 8 6 4 2 0 0 50 100 150 200 250 300 14 12 10 8 6 4 2 0 0 25 50 75 100 125 175 200 figure 11. enable threshold vs. input voltage figure 12. fault bar voltage vs. input voltage input voltage (v) input voltage (v) 14 12 10 8 6 4 2 0 0.50 0.75 1.00 1.25 1.50 1.75 2.00 10 9 8 7 6 5 4 0 2 4 6 8 10 12 figure 13. output voltage vs. load current figure 14. output current (sink) vs. output voltage output current (ma) output voltage (v) 600 900 500 400 300 200 100 0 0 1 2 3 5 6 7 8 13 12 11 10 9 8 7 6 0 0.25 0.75 1.00 1.50 1.75 2.25 2.50 short ? circuit current (ma) ground current ( a) enable threshold voltage (v) faultbar voltage (v) output voltage (v) output current (sink) (ma) 150 4 14 0.50 1.25 2.00 v out = 0 r ext = v in = v en = 8 v v in = 8 v temp = 25 c 700 800
cat6202 http://onsemi.com 8 typical characteristics (shown for 7.5 v output) (v in = 8.5 v, r 1 = 5.1 k , r 2 = 1 k , c in = 1 f, c out = 2.2 f, c byp = 10 nf, r ext = 47 k , t a = 25 c unless otherwise specified. all transient characteristics are generated using the evaluation board cat6202eval1.) figure 15. enable turn ? on (no load) figure 16. enable turn ? on (15 load) figure 17. enable operation (no load) figure 18. enable operation (15 load) figure 19. load transient response (1 ma to 500 ma) figure 20. fault operation (vin = 7 v and 15 load)
cat6202 http://onsemi.com 9 package dimensions tdfn8, 2x3 case 511ak ? 01 issue a pin#1 identification e2 e a3 eb d a2 top view side view bottom view pin#1 index area front view a1 a l d2 notes: (1) all dimensions are in millimeters. (2) complies with jedec mo-229. symbol min nom max a 0.70 0.75 0.80 a1 0.00 0.02 0.05 a3 0.20 ref b 0.20 0.25 0.30 d 1.90 2.00 2.10 d2 1.30 1.40 1.50 e 3.00 e2 1.20 1.30 1.40 e 2.90 0.50 typ 3.10 l 0.20 0.30 0.40 a2 0.45 0.55 0.65
cat6202 http://onsemi.com 10 table 5. ordering information device order number specific device marking package type lead finish shipping ? cat6202vp2 ? gt3 hkc tdfn ? 8 nipdau tape & reel, 3,000 units / reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d. on semiconductor and are registered trademarks of semiconductor co mponents industries, llc (scillc). scillc owns the rights to a numb er of patents, trademarks, copyrights, trade secrets, and other intelle ctual property. a listing of scillc?s pr oduct/patent coverage may be accessed at ww w.onsemi.com/site/pdf/patent ? marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising ou t of the application or use of any product or circuit, and s pecifically 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 applications and actual performance may vary ove r time. all operating parameters , including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or a uthorized 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 whic h the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized appli cation, 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 or indirectly, any claim of personal injury or death associ ated with such unintended or unauthorized use, even if such claim alleges that scil lc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyrig ht laws and is not for resale in any manner. publication ordering information 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 ? 5817 ? 1050 cat6202/d 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 on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your loca l sales representative
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