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? semiconductor components industries, llc, 2007 february, 2007 ? rev. 8 1 publication order number: ncv8505/d ncv8505 series micropower 400 ma ldo linear regulators with enable, delay, and reset the ncv8505 is a family of precision micropower voltage regulators. their output current capability is 400 ma. the family has output voltage options for adjustable, 2.5 v, 3.3 v and 5.0 v. the output voltage is accurate within 2.0% with a maximum dropout voltage of 0.6 v at 400 ma. low quiescent current is a feature drawing less than 1.0 a with enable = 0 v. with enable = 5.0 v, the part only draws 200 a with 100 a load. this part is ideal for any and all battery operated microprocessor equipment. microprocessor control logic includes an active reset (with delay). the active reset circuit operates correctly at an output voltage as low as 1.0 v. the reset function is activated during the power up sequence or during normal operation if the output voltage drops below the regulation limits. the regulator is protected against reverse battery, short circuit, and thermal overload conditions. the device can withstand load dump transients making it suitable for use in automotive environments. the device has also been optimized for emc conditions. features ? output voltage options: adjustable, 2.5 v, 3.3 v, 5.0 v ? 2.0% output ? low < 1.0 a sleep current ? low 200 a quiescent current ? fixed or adjustable output voltage ? active reset ? enable ? 400 ma output current capability ? fault protection ? +60 v peak transient voltage ? ? 15 v reverse voltage ? short circuit ? thermal overload ? pb ? free packages are available ? ncv prefix for automotive and other applications requiring site and change control see detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet. ordering information http://onsemi.com x = voltage ratings as indicated below: a = adjustable 2 = 2.5 v 3 = 3.3 v 5 = 5.0 v a = assembly location wl = wafer lot y = year ww = work week g=pb ? free package marking diagram d 2 pak ? 7 dps suffix case 936ab nc v8505x awlywwg 1 1
ncv8505 series http://onsemi.com 2 pin connections fixed output adjustable output tab = gnd lead 1. delay 2. en- able 3. re- set 4. gnd 5. v adj 6. v out 7. v in 1 tab = gnd lead 1. delay 2. en- able 3. re- set 4. gnd 5. sense 6. v out 7. v in 1 v out gnd v in ncv8505 33 f 5.1 k r rst reset 10 f microprocessor delay c delay v bat v dd figure 1. application diagram v adj (adjustable output only) i/o enable sense (fixed output only) i q
ncv8505 series http://onsemi.com 3 maximum ratings rating value unit v in (dc) ? 15 to 45 v peak transient voltage (46 v load dump @ v in = 14 v) 60 v operating voltage 45 v v out (dc) ? 0.3 to 16 v voltage range (reset , delay) ? 0.3 to 10 v input voltage range: v adj ? 0.3 to 16 v input voltage range (enable) ? 0.3 to 10* v esd susceptibility (human body model) (machine model) 4.0 200 kv v junction temperature, t j ? 40 to +150 c storage temperature, t s ? 55 to 150 c package thermal resistance, 7 lead d 2 pak junction ? to ? case, r jc junction ? to ? ambient, r ja 2.0 10 ? 50** c/w c/w lead temperature soldering: reflow: (smd styles only) (note 1) 240 peak (note 2) c 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. 60 second maximum above 183 c. 2. ? 5 c/+0 c allowable conditions. *reference figure 16 for switched ? battery enable application. **depending on thermal properties of substrate, r ja = r jc + r ca . electrical characteristics (i out = 1.0 ma, enable = 5.0 v, ? 40 c t j 150 c; v in = dependent on voltage option (note 3); unless otherwise specified.) characteristic test conditions min typ max unit output stage output voltage for 2.5 v option (v o ) 6.5 v < v in < 16 v, 1.0 ma i out 400 ma 4.5 v < v in < 26 v , 1.0 ma i out 400 ma 2.450 2.425 2.5 2.5 2.550 2.575 v v output voltage for 3.3 v option (v o ) 7.3 v < v in < 16 v, 1.0 ma i out 400 ma 4.5 v < v in < 26 v , 1.0 ma i out 400 ma 3.234 3.201 3.3 3.3 3.366 3.399 v v output voltage for 5.0 v option (v o ) 9.0 v < v in < 16 v, 1.0 ma i out 400 ma 6.0 v < v in < 26 v , 1.0 ma i out 400 ma 4.90 4.85 5.0 5.0 5.10 5.15 v v output voltage for adjustable option (v o ) v out = v adj (unity gain) 6.5 v < v in < 16 v, 1.0 ma < i out < 400 ma 4.5 v < v in < 26 v , 1.0 ma < i out < 400 ma 1.274 1.261 1.300 1.300 1.326 1.339 v v dropout voltage (v in ? v out ) (5.0 v and adj. > 5.0 v options only) i out = 400 ma i out = 1.0 ma ? ? 400 30 600 150 mv mv load regulation v in = 14 v, 5.0 ma i out 400 ma ? 30 5.0 30 mv line regulation (2.5 v, 3.3 v, and adjustable options) 4.5 v < v in < 26 v, i out = 1.0 ma ? 5.0 25 mv line regulation (5.0 v option) 6.0 v < v in < 26 v, i out = 1.0 ma ? 5.0 25 mv quiescent current, (i q ) active mode i out = 100 a, v in = 12 v i out = 75 ma, v in = 14 v i out 400 ma, v in = 14 v ? ? ? 200 2.5 25 350 5.0 45 a ma ma quiescent current, (i q ) sleep mode enable = 0 v, v in = 12 v, ? 40 c t j 125 c ? ? 1.0 a current limit ? 425 800 ? ma short circuit output current v out = 0 v 100 500 ? ma thermal shutdown (guaranteed by design) 150 180 ? c 3. voltage range specified in the output stage of the electrical characteristics in boldface type.
ncv8505 series http://onsemi.com 4 electrical characteristics (continued) (i out = 1.0 ma, enable = 5.0 v, ? 40 c t j 150 c; v in = dependent on voltage option (note 4); unless otherwise specified.) characteristic test conditions min typ max unit reset function (reset ) reset threshold for 2.5 v option high (v rh ) low (v rl ) hysteresis v in = 4.5 v (note 5) (note 6) v out increasing v out decreasing 2.35 2.30 25 ? ? ? 1.0 v o ? ? v v mv reset threshold for 3.3 v option high (v rh ) low (v rl ) hysteresis v in = 4.5 v (note 5) (note 6) v out increasing v out decreasing 3.10 3.00 35 ? ? ? 1.0 v o ? ? v v mv reset threshold for 5.0 v option high (v rh ) low (v rl ) hysteresis v in = 6.0 v (note 6) v out increasing v out decreasing 4.70 4.60 50 ? ? ? 1.0 v o ? ? v v mv reset threshold for adjustable option high (v rh ) low (v rl ) hysteresis v in = 4.5 v (note 5) (note 6) v out increasing v out decreasing 1.22 1.19 10 ? ? ? 1.0 v o ? ? v v mv output voltage low (v rlo ) v in = minimum (note 6) (note 7) 1.0 v v out v rl , r reset = 5.1 k ? 0.1 0.4 v delay switching threshold (v dt ) (2.5 v, 3.3 v, and 5.0 v options) v in = minimum (note 6) (note 7) 1.4 1.8 2.2 v delay switching threshold (v dt ) (adjustable option) v in = minimum (note 6) (note 7) 1.0 1.3 1.6 v delay low voltage v in = minimum (note 6) (note 7) v out < reset threshold low(min) ? ? 0.2 v delay charge current v in = minimum (note 6) (note 7) delay = 1.0 v, v out > v rh 2.5 4.0 5.5 a delay discharge current v in = minimum (note 6) (note 7) delay = 1.0 v, v out < v rl 5.0 ? ? ma voltage adjust (adjustable output only) input current v adj = 1.25 v, v in = minimum (note 6) (note 7) ? 0.5 ? 0.5 a enable input threshold low, v in = 14 v (note 6) high, v in = 14 v (note 6) ? 2.0 ? ? 1.0 ? v v input current enable = 5.0 v, v in = 14 v (note 6) ? 30 75 a 4. voltage range specified in the output stage of the electrical characteristics in boldface type. 5. for v in 4.5 v, a reset = low may occur with the output in regulation. 6. part is guaranteed by design to meet specification over the entire v in voltage range, but is production tested only at the specified v in voltage. 7. minimum v in = 4.5 v for 2.5 v, 3.3 v, and adjustable options. minimum v in = 6.0 v for 5.0 v option.
ncv8505 series http://onsemi.com 5 package pin description, adjustable output pin number pin symbol function 1 delay timing capacitor for reset function. 2 enable enable control for the ic. a high powers the device up. 3 reset active reset (accurate to v out 1.0 v) 4 gnd ground. all gnd leads must be connected to ground . 5 v adj voltage adjust. a resistor divider from v out to this lead sets the output voltage. 6 v out 2.0%, 400 ma output. 7 v in input voltage. package pin description, fixed output pin number pin symbol function 1 delay timing capacitor for reset function. 2 enable enable control for the ic. a high powers the device up. 3 reset active reset (accurate to v out 1.0 v) 4 gnd ground. all gnd leads must be connected to ground . 5 sense kelvin connection which allows remote sensing of output voltage for improved regulation. if remote sensing is not desired, connect to v out . 6 v out 2.0%, 400 ma output. 7 v in input voltage.
ncv8505 series http://onsemi.com 6 v in reset v out delay figure 2. block diagram gnd current source (circuit bias) current limit sense error amplifier v bg i bias v bg i bias i bias + ? + ? bandgap reference thermal protection 1.8 v (fixed versions) 1.3 v (adjustable version) 4.0 a 15 k adjustable version only v adj enable fixed versions only sense + ? 1.5 v + ? v bg ? 18 mv
ncv8505 series http://onsemi.com 7 typical performance characteristics figure 3. 5 v output voltage vs. temperature 0 0 i out , output current (ma) 50 100 150 200 250 700 dropout voltage (mv) 400 300 200 100 5 v and adj. > 5 v options only figure 4. 3.3 v output voltage vs. temperature figure 5. 2.5 v output voltage vs. temperature figure 6. dropout voltage vs. output current input voltage (v) output voltage (v) figure 7. output voltage vs. input voltage figure 8. output voltage vs. input voltage 500 600 125 c ? 40 v out , output voltage (v) 4.90 temperature ( c) 4.98 5.00 5.08 5.10 ? 20 140 0 20 40 60 80 120 100 v out = 5.0 v v in = 14 v i out = 5.0 ma 4.96 5.06 4.94 5.04 4.92 5.02 160 ? 40 v out , output voltage (v) 3.23 temperature ( c) 3.31 3.33 3.35 ? 20 140 0 20 40 60 80 120 100 v out = 3.3 v v in = 14 v i out = 5.0 ma 3.29 3.27 3.25 160 ? 40 v out , output voltage (v) 2.45 temperature ( c) 2.49 2.50 2.54 2.55 ? 20 140 0 20 40 60 80 120 100 v out = 2.5 v v in = 14 v i out = 5.0 ma 2.48 2.53 2.47 2.52 2.46 2.51 160 300 350 400 25 c ? 40 c i out = 1 ma input voltage (v) output voltage (v) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 4 8 12162024 125 c 25 c ? 40 c 0.0 0.5 1.0 1.5 2.0 2.5 3.0 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 i out = 1 ma 125 c 25 c ? 40 c
ncv8505 series http://onsemi.com 8 typical performance characteristics 0.01 i out , output current (ma) 50 100 150 200 250 350 400 100 esr ( ) 10 1.0 0.1 0 figure 9. output stability with output voltage change figure 10. output stability with output capacitor change 300 v in = 14 v c vout = 10 f unstable region stable region 2.5 v 3.3 v 5.0 v 0.1 i out , output current (ma) 50 100 150 200 250 350 400 100 esr ( ) 10 1.0 0 300 5 v version unstable region stable region c vout = 0.1 f unstable region c vout = 33 f* *there is no unstable lower region for the 33 f capacitor figure 11. quiescent current vs. output current figure 12. quiescent current vs. output current figure 13. quiescent current vs. input voltage 0 i q , quiescent current (ma) 0.0 i out , output current (ma) 0.2 0.4 0.6 0.8 1.0 1.2 2.0 5101520 30 25 +25 c +125 c ? 40 c figure 14. quiescent current vs. input voltage 35 40 50 45 1.4 1.6 1.8 0 i q , quiescent current (ma) 0 i out , output current (ma) 10 20 30 40 50 60 50 100 150 200 300 250 +25 c +125 c ? 40 c 350 400 500 450 6 i q , quiescent current (ma) 0 v in , input voltage (v) 2 4 6 8 10 12 8 10 12 14 18 16 t = 25 c i out = 200 ma 20 22 26 24 i out = 100 ma i out = 50 ma i out = 10 ma 6 i q , quiescent current ( a) 175 v in , input voltage (v) 180 185 190 195 200 210 8 10 12 14 18 16 t = 25 c 20 22 26 24 i out = 100 a 205
ncv8505 series http://onsemi.com 9 circuit description regulator control functions the ncv8505 contains the microprocessor compatible control function reset (figure 15). figure 15. reset and delay circuit wave forms v in v out reset delay (v dt ) threshold delay threshold reset t d t d reset function a reset signal (low voltage) is generated as the ic powers up until v out is within 1.5% of the regulated output voltage, or when v out drops out of regulation,and is lower than 4.0% below the regulated output voltage. hysteresis is included in the function to minimize oscillations. the reset output is an open collector npn transistor, controlled by a low voltage detection circuit. the circuit is functionally independent of the rest of the ic thereby guaranteeing that the reset signal is valid for v out as low as 1.0 v. enable function the part stays in a low i q sleep mode when the enable pin is held low. the part has an internal pull down if the pin is left floating. the integrity of the enable pin allows it to be tied to the battery line through an external resistor. it will withstand load dump potentials in this configuration. figure 16. enable function v in v out gnd ncv8505 enable v bat up to 45 v 10 k delay function the reset delay circuit provides a programmable (by external capacitor) delay on the reset output lead. the delay lead provides source current (typically 4.0 a) to the external delay capacitor during the following proceedings: 1. during power up (once the regulation threshold has been verified). 2. after a reset event has occurred and the device is back in regulation. the delay capacitor is discharged when the regulation (reset threshold) has been violated. this is a latched incident. the capacitor will fully discharge and wait for the device to regulate before going through the delay time event again. voltage adjust figure 17 shows the device setup for a user configurable output voltage. the feedback to the v adj pin is taken from a voltage divider referenced to the output voltage. the loop is balanced around the unity gain threshold (1.30 v typical). figure 17. adjustable output voltage v out v adj ncv8505 15 k 5.1 k c out 5.0 v 1.28 v
ncv8505 series http://onsemi.com 10 application notes setting the delay time the delay time is controlled by the reset delay low voltage, delay switching threshold, and the delay charge current. the delay follows the equation: t delay [ c delay (v dt reset delay low voltage) ] delay charge current example: using c delay = 33 nf. assume reset delay low voltage = 0. use the typical value for v dt = 1.8 v (2.5 v, 3.3 v, and 5.0 v options). use the typical value for delay charge current = 4.2 a. t delay [ 33 nf(1.8 0) ] 4.2 a 14 ms stability considerations the output or compensation capacitor helps determine three main characteristics of a linear regulator: start ? up delay, load transient response and loop stability. the capacitor value and type should be based on cost, availability, size and temperature constraints. a tantalum or aluminum electrolytic capacitor is best, since a film or ceramic capacitor with almost zero esr can cause instability. the aluminum electrolytic capacitor is the least expensive solution, but, if the circuit operates at low temperatures ( ? 25 c to ? 40 c), both the value and esr of the capacitor will vary considerably. the capacitor manufacturers data sheet usually provides this information. the value for the output capacitor c out shown in figure 18 should work for most applications, however it is not necessarily the optimized solution. figure 18. test and application circuit showing output compensation v in v out c out ** 33 f r rst reset c in * 0.1 f ncv8505 *c in required if regulator is located far from the power supply filter. **c out required for stability. capacitor must operate at minimum temperature expected. calculating power dissipation in a single output linear regulator the maximum power dissipation for a single output regulator (figure 19) is: p d(max) [v in(max) v out(min) ]i out(max) (1) v in(max) i q where: v in(max) is the maximum input voltage, v out(min) is the minimum output voltage, i out(max) is the maximum output current for the application, and i q is the quiescent current the regulator consumes at i out(max) . once the value of p d(max) is known, the maximum permissible value of r ja can be calculated: r ja 150 c t a p d (2) the value of r ja can then be compared with those in the package section of the data sheet. those packages with r ja ?s less than the calculated value in equation 2 will keep the die temperature below 150 c. in some cases, none of the packages will be sufficient to dissipate the heat generated by the ic, and an external heatsink will be required. smart regulator ? i q control features i out i in figure 19. single output regulator with key performance parameters labeled v in v out } heat sinks a heat sink effectively increases the surface area of the package to improve the flow of heat away from the ic and into the surrounding air. each material in the heat flow path between the ic and the outside environment will have a thermal resistance. like series electrical resistances, these resistances are summed to determine the value of r ja : r ja r jc r cs r sa (3) where: r jc = the junction ? to ? case thermal resistance, r cs = the case ? to ? heatsink thermal resistance, and r sa = the heatsink ? to ? ambient thermal resistance. r jc appears in the package section of the data sheet. like r ja , it too is a function of package type. r cs and r sa are functions of the package type, heatsink and the interface between them. these values appear in heat sink data sheets of heat sink manufacturers.
ncv8505 series http://onsemi.com 11 ordering information device output voltage package shipping ? ncv8505d2tadj adjustable d 2 pak ? 7 50 units / rail ncv8505d2tadjg d 2 pak ? 7 (pb ? free) 50 units / rail ncv8505d2tadjr4 d 2 pak ? 7 750 tape & reel NCV8505D2TADJR4G d 2 pak ? 7 (pb ? free) 750 tape & reel ncv8505d2t25 2.5 v d 2 pak ? 7 50 units / rail ncv8505d2t25g d 2 pak ? 7 (pb ? free) 50 units / rail ncv8505d2t25r4 d 2 pak ? 7 750 tape & reel ncv8505d2t25r4g d 2 pak ? 7 (pb ? free) 750 tape & reel ncv8505d2t33 3.3 v d 2 pak ? 7 50 units / rail ncv8505d2t33g d 2 pak ? 7 (pb ? free) 50 units / rail ncv8505d2t33r4 d 2 pak ? 7 750 tape & reel ncv8505d2t33r4g d 2 pak ? 7 (pb ? free) 750 tape & reel ncv8505d2t50 5.0 v d 2 pak ? 7 50 units / rail ncv8505d2t50g d 2 pak ? 7 (pb ? free) 50 units / rail ncv8505d2t50r4 d 2 pak ? 7 750 tape & reel ncv8505d2t50r4g d 2 pak ? 7 (pb ? free) 750 tape & 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.
ncv8505 series http://onsemi.com 12 package dimensions d 2 pak ? 7 (short lead) dps suffix case 936ab ? 01 issue a dim min max min max millimeters inches a 0.396 0.406 10.05 10.31 b 0.326 0.336 8.28 8.53 c 0.170 0.180 4.31 4.57 d 0.026 0.036 0.66 0.91 e 0.045 0.055 1.14 1.40 g 0.050 ref 1.27 ref h 0.539 0.579 13.69 14.71 k l 0.000 0.010 0.00 0.25 m 0.100 0.110 2.54 2.79 n 0.017 0.023 0.43 0.58 notes: 1. dimensions and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. a b k e p m n d g u v s h l c r 0.055 0.066 1.40 1.68 p 0.058 0.078 1.47 1.98 r s 0.095 0.105 2.41 2.67 u 0.256 ref 6.50 ref v 0.305 ref 7.75 ref 0 8 0 8 terminal 8 8.26 0.325 10.54 0.415 0.96 0.038 scale 3:1 mm inches 9.5 0.374 3.25 0.128 2.16 0.085 3.8 0.150 1.27 0.050 c l c l 1 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular 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 wi thout 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. scillc 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 of ficers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or 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 manufacture 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 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 ncv8505/d smart regulator is a registered trademark of semiconductor components industries, llc (scillc). 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 local sales representative

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