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? semiconductor components industries, llc, 2012 june, 2012 ? rev. 2 1 publication order number: ncv4266/d ncv4266 150 ma low-dropout voltage regulator with enable the ncv4266 is a 150 ma output current integrated low dropout regulator family designed for use in harsh automotive environments. it includes wide operating temperature and input voltage ranges. the device is offered with fixed voltage versions of 3.3 v and 5.0 v available in 2% output voltage accuracy. it has a high peak input voltage tolerance and reverse input voltage protection. it also provides overcurrent protection, overtemperature protection and enable function for control of the state of the output voltage. the ncv4266 is available in sot ? 223 surface mount package. the output is stable over a wide output capacitance and esr range. the ncv4266 has improved startup behavior during input voltage transients. features ? 3.3 v and 5.0 v output voltage ? 150 ma output current ? 500 mv (max) dropout voltage ? enable input ? very low current consumption ? fault protection ? +45 v peak transient voltage ? ? 42 v reverse voltage ? short circuit ? thermal overload ? ncv prefix for automotive and other applications requiring unique site and control change requirements; aec ? q100 qualified and ppap capable ? these are pb ? free devices ? + i en q gnd current limit and saturation sense bandgap reference thermal shutdown figure 1. block diagram error amplifier sot ? 223 (to ? 261) st suffix case 318e see detailed ordering and shipping information in the ordering information section on page 10 of this data sheet. ordering information http://onsemi.com marking diagram 1 ayw 4266x a = assembly location y = year w = work week x = voltage option 3.3 v (x = 3) 5.0 v (x = 5) = pb ? free package (*note: microdot may be in either location)
ncv4266 http://onsemi.com 2 pin function description pin no. symbol description 1 i input; battery supply input v oltage. 2 en enable input; low level disables the ic. 3 q output; bypass with a capacitor to gnd. 4 gnd ground. maximum ratings * rating symbol min max unit input v oltage v i ? 42 45 v input peak t ransient v oltage v i ? 45 v enable input v oltage v en ? 42 45 v output v oltage v q ? 1.0 40 v ground current i q ? 100 ma input voltage operating range v i v q + 0.5 v or 4.5 (note 1) 40 v esd susceptibility (human body model) (machine model) ? ? 4.0 250 ? ? kv v junction t emperature t j ? 40 150 c storage t emperature t stg ? 50 150 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. *during the voltage range which exceeds the maximum tested voltage of i, operation is assured, but not specified. wider limits may appl y. thermal dissipation must be observed closely. 1. minimum v i = 4.5 v or (v q + 0.5 v), whichever is higher. lead temperature soldering reflow and msl (note 2) rating symbol min max unit lead temperature soldering reflow (smd styles only), leaded, 60 ? 150 s above 183, 30 s max at peak reflow (smd styles only), free, 60 ? 150 s above 217, 40 s max at peak wave solder (through hole styles only), 12 sec max t sld ? ? ? 240 265 310 c moisture sensitivity level msl 3 ? 2. per ipc / jedec j ? std ? 020c. thermal characteristics characteristic test conditions (typical v alue) unit min pad board (note 3) 1 pad board (note 4) junction ? to ? tab (psi ? jl4, jl4 ) 15.7 18 c/w junction ? to ? ambient (r ja , ja ) 96 77 c/w 3. 1 oz. copper, 0.26 inch 2 (168 mm 2 ) copper area, 0.062 thick fr4. 4. 1 oz. copper, 1.14 inch 2 (736 mm 2 ) copper area, 0.062 thick fr4.
ncv4266 http://onsemi.com 3 electrical characteristics (v i = 13.5 v; ? 40 c < t j < 150 c; unless otherwise noted.) characteristic symbol test conditions min typ max unit output output voltage (5.0 v v ersion) v q 5.0 ma < i q < 150 ma, 6 v < v i < 28 v 4.9 5.0 5.1 v output voltage (3.3 v v ersion) v q 5.0 ma < i q < 150 ma, 4.5 v < v i < 28 v 3.234 3.3 3.366 v output current limitation i q v q = 90% v qtyp 150 200 500 ma quiescent current (sleep mode) i q = i i ? i q i q v en = 0 v ? ? 10 a quiescent current, i q = i i ? i q i q i q = 1.0 ma ? 130 200 a quiescent current, i q = i i ? i q i q i q = 150 ma ? 10 15 ma dropout voltage (5.0 v v ersion) v dr i q = 150 ma, v dr = v i ? v q (note 5) ? 250 500 mv load regulation v q,lo i q = 5.0 ma to 150 ma ? 3.0 20 mv line regulation (5.0 v v ersion) v q v i = 6.0 v to 28 v, i q = 5.0 ma ? 10 25 mv line regulation (3.3 v v ersion) v q v i = 4.5 v to 28 v, i q = 5.0 ma ? 10 25 mv power supply ripple rejection psrr f r = 100 hz, v r = 0.5 v pp ? 70 ? db temperature output voltage drift d vq/dt ? ? 0.5 ? mv/k enable input enable voltage, output high v en v q v qmin ? 2.3 2.8 v enable voltage, output low (off) v en v q 0.1 v 1.8 2.2 ? v enable input current i en v en = 5.0 v 5.0 10 20 a thermal shutdown thermal shutdown t emperature* t sd 150 ? 210 c *guaranteed by design, not tested in production. 5. measured when the output voltage v q has dropped 100 mv from the nominal value obtained at v = 13.5 v. input c i1 1.0 f c i2 100 nf i i i en 1 2 3 4 gnd c q 22 f i q q output figure 2. applications circuit ncv4266 r l i en
ncv4266 http://onsemi.com 4 typical performance characteristics figure 3. output stability with output capacitor esr output current (ma) esr ( ) c q = 10 f ? 100 f stable region unstable region 0.01 1 10 100 0 25 50 75 100 125 150 figure 4. output voltage vs. junction temperature, 5.0 v version v i , input voltage (v) t j = 25 c r l = 33 figure 5. output voltage vs. junction temperature, 3.3 v version figure 6. quiescent current vs. input voltage, 5.0 v version figure 7. quiescent current vs. input voltage, 3.3 v version i q , quiescent current (ma) 4.8 4.9 5.0 5.1 5.2 ? 40 0 40 80 120 160 v i = 13.5 v r l = 1 k t j , junction temperature ( c) v q , output voltage (v) 0 5 10 15 20 25 0 5 10 15 20 25 30 35 40 0.1 3.1 3.2 3.3 3.4 3.5 ? 40 0 40 80 120 160 v i = 13.5 v r l = 660 t j , junction temperature ( c) v q , output voltage (v) v i , input voltage (v) t j = 25 c r l = 22 i q , quiescent current (ma) 0 1 2 3 4 5 0 5 10 15 20 25 30 35 40 6
ncv4266 http://onsemi.com 5 typical performance characteristics figure 8. ou tput voltage vs. input voltage, 5.0 v version figure 9. output voltage vs. input voltage, 3.3 v version figure 10. input current vs. input voltage, 5.0 v version figure 11. input current vs. input voltage, 3.3 v version t j = 25 c 0 100 200 300 0 50 100 150 i q , output current (ma) v dr , dropout voltage (mv) figure 12. dropout voltage vs. output current (5.0 v version only) t j = 125 c v i , input voltage (v) i q , output current (ma) t j = 25 c v q = 0 v figure 13. maximum output current vs. input voltage 0 50 100 150 200 250 300 350 400 0 5 10 15 20 25 30 35 40 25 75 125 250 150 50 ? 10 ? 8.0 ? 6.0 ? 4.0 ? 2.0 0 2.0 4.0 6.0 ? 50 ? 25 0 25 50 i i , input current (ma) t j = 25 c r l = 6.8 k v i , input voltage (v) ? 7 ? 6 ? 5 ? 4 ? 3 ? 2 ? 1 0 1 ? 50 ? 25 0 25 50 i i , input current (ma) t j = 25 c r l = 6.8 k v i , input voltage (v) 0 1 2 3 4 5 6 0246810 v i , input voltage (v) v q , output voltage (v) t j = 25 c r l = 33 0 1 2 3 4 5 6 0246810 v i , input voltage (v) v q , output voltage (v) t j = 25 c r l = 22
ncv4266 http://onsemi.com 6 typical performance characteristics figure 14. quiescent current vs. output current (low load), 5.0 v version figure 15. quiescent current vs. output current (high load), 5.0 v version figure 16. quiescent current vs. output current (low load), 3.3 v version figure 17. quiescent current vs. output current (high load), 3.3 v version i q , output current (ma) i q , output current (ma) i q , quiescent current (ma) i q , quiescent current (ma) 0 0.2 0.4 0.6 0.8 1 0 5 10 15 20 25 30 t j = 25 c v i = 13.5 v 0 1 2 3 4 5 6 0 25 50 75 100 125 150 t j = 25 c v i = 13.5 v i q , output current (ma) i q , output current (ma) i q , quiescent current (ma) i q , quiescent current (ma) 0 0.2 0.4 0.6 0.8 1 0 5 10 15 20 25 30 t j = 25 c v i = 13.5 v 0 1 2 3 4 5 6 0 25 50 75 100 125 150 t j = 25 c v i = 13.5 v
ncv4266 http://onsemi.com 7 circuit description the ncv4266 is an integrated low dropout regulator that provides a regulated voltage at 150 ma to the output. it is enabled with an input to the enable pin. the regulator voltage is provided by a pnp pass transistor controlled by an error amplifier with a bandgap reference, which gives it the lowest possible dropout voltage. the output current capability is 150 ma, and the base drive quiescent current is controlled to prevent oversaturation when the input voltage is low or when the output is overloaded. the regulator is protected by both current limit and thermal shutdown. thermal shutdown occurs above 150 c to protect the ic during overloads and extreme ambient temperatures. regulator the error amplifier compares the reference voltage to a sample of the output voltage (v q ) and drives the base of a pnp series pass transistor via a buffer. the reference is a bandgap design to give it a temperature ? stable output. saturation control of the pnp is a function of the load current and input voltage. oversaturation of the output power device is prevented, and quiescent current in the ground pin is minimized. see figure 2, test circuit, for circuit element nomenclature illustration. regulator stability considerations the input capacitors (c i1 and c i2 ) are necessary to stabilize the input impedance to avoid voltage line influences. using a resistor of approximately 1.0 in series with c i2 can stop potential oscillations caused by stray inductance and capacitance. the output capacitor helps determine three main characteristics of a linear regulator: startup delay, load transient response and loop stability. the capacitor value and type should be based on cost, availability, size and temperature constraints. 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 manufacturer?s data sheet usually provides this information. the value for the output capacitor c q , shown in figure 2, should work for most applications; see also figure 3 for output stability at various load and output capacitor esr conditions. stable region of esr in figure 3 shows esr values at which the ldo output voltage does not have any permanent oscillations at any dynamic changes of output load current. mar ginal esr is the value at which the output voltage waving is fully damped during four periods after the load change and no oscillation is further observable. esr characteristics were measured with ceramic capacitors and additional series resistors to emulate esr. low duty cycle pulse load current technique has been used to maintain junction temperature close to ambient temperature. enable input the enable pin is used to turn the regulator on or off. by holding the pin down to a voltage less than 1.8 v, the output of the regulator will be turned off. when the voltage on the enable pin is greater than 2.8 v, the output of the regulator will be enabled to power its output to the regulated output voltage. the enable pin may be connected directly to the input pin to give constant enable to the output regulator.
ncv4266 http://onsemi.com 8 calculating power dissipation in a single output linear regulator the maximum power dissipation for a single output regulator (figure 18) is: p d(max) [v i(max) v q(min) ]i q(max) (1) v i(max) i q where v i(max) is the maximum input voltage, v q(min) is the minimum output voltage, i q(max) is the maximum output current for the application, i q is the quiescent current the regulator consumes at i q(max) . once the value of p d(max) is known, the maximum permissible value of r ja can be calculated: r ja 150 o 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 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 ? iq control features i q i i figure 18. single output regulator with key performance parameters labeled v i v q } heatsinks a heatsink 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 is the junction ? to ? case thermal resistance, r cs is the case ? to ? heatsink thermal resistance, r sa is 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 data sheets of heatsink manufacturers. thermal, mounting, and heatsinking considerations are discussed in the on semiconductor application note an1040/d.
ncv4266 http://onsemi.com 9 figure 19. r ja vs. copper spreader area copper heat spreader area (mm 2 ) r ja , thermal resistance (c /w) 1 oz 2 oz 60 70 80 90 100 110 120 130 140 0 100 200 300 400 500 600 700 0.1 1 10 100 0.000001 0.00001 0. 0001 0.001 0.01 0.1 1 10 100 1000 figure 20. single ? pulse heating curves time (sec) r(t) c /w cu area 167 mm 2 cu area 736 mm 2 pulse width (sec) r ja 736 mm 2 c /w non ? normalized response 50% duty cycle figure 21. duty cycle for 1 spreader boards 20% 10% 5% 2% 1% 0.1 1 10 100 0.000001 0. 00001 0.0001 0.001 0.01 0.1 1 10 100 1000
ncv4266 http://onsemi.com 10 ordering information device output voltage package shipping ? ncv4266st33t3g 3.3 v sot ? 223 (pb ? free) 4000 / tape & reel NCV4266ST50T3G 5.0 v sot ? 223 (pb ? free) 4000 / 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, brd801 1/d.
ncv4266 http://onsemi.com 11 package dimensions sot ? 223 (to ? 261) case 318e ? 04 issue n a1 b1 d e b e e1 4 123 0.08 (0003) a l1 c notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: inch. 1.5 0.059 mm inches scale 6:1 3.8 0.15 2.0 0.079 6.3 0.248 2.3 0.091 2.3 0.091 2.0 0.079 soldering footprint h e dim a min nom max min millimeters 1.50 1.63 1.75 0.060 inches a1 0.02 0.06 0.10 0.001 b 0.60 0.75 0.89 0.024 b1 2.90 3.06 3.20 0.115 c 0.24 0.29 0.35 0.009 d 6.30 6.50 6.70 0.249 e 3.30 3.50 3.70 0.130 e 2.20 2.30 2.40 0.087 0.85 0.94 1.05 0.033 0.064 0.068 0.002 0.004 0.030 0.035 0.121 0.126 0.012 0.014 0.256 0.263 0.138 0.145 0.091 0.094 0.037 0.041 nom max l1 1.50 1.75 2.00 0.060 6.70 7.00 7.30 0.264 0.069 0.078 0.276 0.287 h e ? ? e1 0 1 0 0 1 0 l l 0.20 ??? ??? 0.008 ??? ??? on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc owns the rights to a numb er of patents, trademarks, copyrights, trade secrets, and other intellectual property. a listing of scillc?s product/patent coverage may be accessed at ww w.onsemi.com/site/pdf/patent ? marking.pdf . sc illc 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 out of the application or use of any product or circui t, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data she ets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for e ach 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 designe d, 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 o ther application in which 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 u nintended 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 or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed 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 l iterature 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 ? 5817 ? 1050 ncv4266/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 loc a sales representative

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