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? semiconductor components industries, llc, 2002 may, 2002 rev. 4 1 publication order number: ncp512/d ncp512 80 ma cmos low iq voltage regulator in an sc70-5 the ncp512 series of fixed output linear regulators are designed for handheld communication equipment and portable battery powered applications which require low quiescent. the ncp512 series features an ultralow quiescent current of 40 a. each device contains a voltage reference unit, an error amplifier, a pmos power transistor, resistors for setting output voltage, current limit, and temperature limit protection circuits. the ncp512 has been designed to be used with low cost ceramic capacitors. the device is housed in the microminiature sc705 surface mount package. standard voltage versions are 1.5, 1.8, 2.5, 2.7, 2.8, 3.0, 3.3, and 5.0 v. other voltages are available in 100 mv steps. features ? low quiescent current of 40 a typical ? low dropout voltage of 250 mv at 80 ma ? low output voltage option ? output voltage accuracy of 2.0% ? industrial temperature range of 40 c to 85 c typical applications ? cellular phones ? battery powered consumer products ? handheld instruments ? camcorders and cameras figure 1. typical application diagram this device contains 86 active transistors vout battery or unregulated voltage c1 c2 off on 1 2 3 5 4 + + see detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet. ordering information sc705/sc88a/ sot353 sq suffix case 419a 1 5 pin connections 1 3 n/c v in 2 gnd enable 4 v out 5 (top view) xxx = specific device code d = date code xxxd marking diagram http://onsemi.com
ncp512 http://onsemi.com 2 pin function description pin no. pin name description 1 gnd power supply ground. 2 vin positive power supply input voltage. 3 vout regulated output voltage. 4 n/c no internal connection. 5 enable this input is used to place the device into lowpower standby. when this input is pulled low, the device is disabled. if this function is not used, enable should be connected to vin. maximum ratings rating symbol value unit input voltage v in 0 to 6.0 v enable voltage enable 0.3 to v in +0.3 v output voltage v out 0.3 to v in +0.3 v power dissipation and thermal characteristics power dissipation thermal resistance, junction to ambient p d r ja internally limited 400 w c/w operating junction temperature t j +125 c operating ambient temperature t a 40 to +85 c storage temperature t stg 55 to +150 c 1. this device series contains esd protection and exceeds the following tests: human body model 2000 v per milstd883, method 3015 machine model method 200 v 2. latchup capability (85 c) 200 ma dc with trigger voltage.
ncp512 http://onsemi.com 3 electrical characteristics (v in = v out(nom.) + 1.0 v, v enable = v in , c in = 1.0 f, c out = 1.0 f, t j = 25 c, unless otherwise noted.) characteristic symbol min typ max unit output voltage (t a = 25 c, i out = 10 ma) 1.5 v 1.8 v 2.5 v 2.7 v 2.8 v 3.0 v 3.3 v 5.0 v v out 1.455 1.746 2.425 2.646 2.744 2.94 3.234 4.900 1.5 1.8 2.5 2.7 2.8 3.0 3.3 5.0 1.545 1.854 2.575 2.754 2.856 3.06 3.366 5.100 v output voltage (t a = 40 c to 85 c, i out = 10 ma) 1.5 v 1.8 v 2.5 v 2.7 v 2.8 v 3.0 v 3.3 v 5.0 v v out 1.455 1.746 2.425 2.619 2.716 2.910 3.201 4.900 1.5 1.8 2.5 2.7 2.8 3.0 3.3 5.0 1.545 1.854 2.575 2.781 2.884 3.09 3.399 5.100 v line regulation (i out = 10 ma) 1.5 v4.4 v (v in = v out(nom.) + 1.0 v to 6.0 v) 4.5 v5.0 v (v in = 5.5 v to 6.0 v) reg line 1.0 1.0 3.0 3.0 mv/v load regulation (i out = 1.0 ma to 80 ma) reg load 0.3 0.8 mv/ma output current (v out = (v out at i out = 80 ma) 3%) 1.5 v3.9 v (v in = v out(nom.) + 2.0 v) 4.0 v5.0 v (v in = 6.0 v) i o(nom.) 80 80 200 200 ma dropout voltage (t a = 40 c to 85 c, i out = 80 ma, measured at v out 3.0%) 1.5 v 1.8 v 2.5 v 2.7 v 2.8 v 3.0 v 3.3 v 5.0 v v in v out 450 350 220 200 200 180 160 120 550 450 300 300 300 300 300 300 mv quiescent current (enable input = 0 v) (enable input = v in , i out = 1.0 ma to i o(nom.) ) i q 0.1 40 1.0 90 a output short circuit current (v out = 0 v) 1.5 v3.9 v (v in = v out(nom.) + 2.0 v) 4.0 v5.0 v (v in = 6.0 v) i out(max) 150 150 250 250 400 400 ma output voltage noise (f = 100 hz to 100 khz) i out = 30 ma, c out = 1 f v n 180 vrms ripple rejection (f = 1.0 khz, 60 ma) rr 50 db enable input threshold voltage (voltage increasing, output turns on, logic high) (voltage decreasing, output turns off, logic low) v th(en) 1.3 0.3 v output voltage temperature coefficient t c 100 ppm/ c 3. maximum package power dissipation limits must be observed. pd t j(max) t a r ja 4. low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
ncp512 http://onsemi.com 4 typical characteristics 200 50 25 0 25 50 75 100 150 100 50 0 125 temperature ( c) figure 2. dropout voltage vs. temperature v in v out , dropout voltage (mv) 250 300 3.010 60 40 20 0 20 40 60 3.005 3.000 2.990 2.985 100 temperature ( c) figure 3. output voltage vs. temperature v out , output voltage (v) 3.015 3.020 80 2.995 60 40 20 0 20 40 60 48 44 42 100 temperature ( c) figure 4. quiescent current vs. temperature i q , quiescent current ( a) 80 46 40 40 01 23456 30 20 10 0 7 v in input voltage (v) figure 5. quiescent current vs. input voltage 50 60 i q , quiescent current ( a) 40 01 23456 30 20 10 0 7 v in input voltage (v) figure 6. ground pin current vs. input voltage 50 60 i gnd , ground current ( a) 40 100 1000 10000 100000 1000000 30 20 10 0 frequency (hz) figure 7. ripple rejection vs. frequency 50 60 ripple rejection (db) 70 i o = 80 ma ncp512sq30 i o = 40 ma i o = 10 ma v in = 6.0 v v in = 4.0 v i out = 0 ma v in = 4.0 v v out = 3.0 v v out = 3.0 v c in = 1.0 f c out = 1.0 f t a = 25 c v out = 3.0 v c in = 1.0 f c out = 1.0 f i out = 30 ma t a = 25 c v in = 4.0 v c out = 1.0 f i out = 30 ma
ncp512 http://onsemi.com 5 typical characteristics 4 10 1000 10000 100000 1000000 3 2 1 0 frequency (hz) figure 8. output noise density 5 6 output voltage noise ( v/ hz ) 7 100 figure 9. line transient response 100 0 50 200 250 300 time ( s) 0 100 200 3 4 5 6 100 150 output voltage deviation (mv) v in = 4.0 v c out = 1.0 f i out = 30 ma 400 450 500 350 7 v in , input voltage (v) c out = 1.0 f i out = 10 ma figure 10. load transient response 100 0 200 300 time ( s) 0 100 200 0 100 output voltage deviation (mv) 400 500 i o , output current (ma) i out = 1 ma to 60 ma v in = 4.0 v c in = 1.0 f c out = 1.0 f 200 600 700 800 60 ma figure 11. turnon response 0 0.5 2.0 2.5 3.0 time ( s) 0 1 2 3 4 0 2 1.0 1.5 output voltage (v) 4.0 4.5 5.0 3.5 4 v in , input voltage (v) 6 i out = 10 ma v in = 4.0 v c in = 1.0 f c out = 1.0 f 2.5 0 1.0 2.0 3.0 4.0 5.0 6.0 2.0 1.5 0.5 0 v in , input voltage (v) v out , output voltage (v) 3.0 3.5 1.0 figure 12. output voltage vs. input voltage
ncp512 http://onsemi.com 6 definitions load regulation the change in output voltage for a change in output current at a constant temperature. dropout voltage the input/output differential at which the regulator output no longer maintains regulation against further reductions in input voltage. measured when the output drops 3.0% below its nominal. the junction temperature, load current, and minimum input supply requirements affect the dropout level. maximum power dissipation the maximum total dissipation for which the regulator will operate within its specifications. quiescent current the quiescent current is the current which flows through the ground when the ldo operates without a load on its output: internal ic operation, bias, etc. when the ldo becomes loaded, this term is called the ground current. it is actually the difference between the input current (measured through the ldo input pin) and the output current. line regulation the change in output voltage for a change in input voltage. the measurement is made under conditions of low dissipation or by using pulse technique such that the average chip temperature is not significantly affected. line transient response typical over and undershoot response when input voltage is excited with a given slope. thermal protection internal thermal shutdown circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. when activated at typically 160 c, the regulator turns off. this feature is provided to prevent failures from accidental overheating. maximum package power dissipation the maximum power package dissipation is the power dissipation level at which the junction temperature reaches its maximum operating value, i.e. 125 c. depending on the ambient power dissipation and thus the maximum available output current.
ncp512 http://onsemi.com 7 applications information a typical application circuit for the ncp512 series is shown in figure 1, front page. input decoupling (c1) a 1.0 f capacitor either ceramic or tantalum is recommended and should be connected close to the ncp512 package. higher values and lower esr will improve the overall line transient response. tdk capacitor: c2012x5r1c105k, or c1608x5r1a105k output decoupling (c2) the ncp512 is a stable regulator and does not require any specific equivalent series resistance (esr) or a minimum output current. capacitors exhibiting esrs ranging from a few m up to 5.0 can thus safely be used. the minimum decoupling value is 1.0 f and can be augmented to fulfill stringent load transient requirements. the regulator accepts ceramic chip capacitors as well as tantalum capacitors. larger values improve noise rejection and load regulation transient response. tdk capacitor: c2012x5r1c105k, c1608x5r1a105k, or c3216x7r1c105k enable operation the enable pin will turn on the regulator when pulled high and turn off the regulator when pulled low. these limits of threshold are covered in the electrical specification section of this data sheet. if the enable is not used then the pin should be connected to v in . hints please be sure the vin and gnd lines are suf ficiently wide. when the impedance of these lines is high, there is a chance to pick up noise or cause the regulator to malfunction. set external components, especially the output capacitor, as close as possible to the circuit, and make leads as short as possible. thermal as power across the ncp512 increases, it might become necessary to provide some thermal relief. the maximum power dissipation supported by the device is dependent upon board design and layout. mounting pad configuration on the pcb, the board material and also the ambient temperature effect the rate of temperature rise for the part. this is stating that when the ncp512 has good thermal conductivity through the pcb, the junction temperature will be relatively low with high power dissipation applications. the maximum dissipation the package can handle is given by: pd t j(max) t a r ja if junction temperature is not allowed above the maximum 125 c, then the ncp512 can dissipate up to 250 mw @ 25 c. the power dissipated by the ncp512 can be calculated from the following equation: p tot [ v in *i gnd (i out ) ] [ v in v out ] *i out or v inmax p tot v out * i out i gnd i out if an 80 ma output current is needed then the ground current from the data sheet is 40 a. for an ncp512 (3.0 v), the maximum input voltage will then be 6.12 v.
ncp512 http://onsemi.com 8 minimum recommended footprint for surface mounted applications surface mount board layout is a critical portion of the total design. the footprint for the semiconductor packages must be the correct size to insure proper solder connection interface between the board and the package. with the correct pad geometry, the packages will self align when subjected to a solder reflow process. sc705 (sc88a/sot353) 0.5 mm (min) 0.4 mm (min) 0.65 mm 0.65 mm 1.9 mm
ncp512 http://onsemi.com 9 ordering information device nominal output voltage* marking package shipping ncp512sq15t1 1.5 lck ncp512sq18t1 1.8 lcl ncp512sq25t1 2.5 lcm ncp512sq27t1 2.7 lcn sc705 3000 units/ ncp512sq28t1 2.8 lco sc70 5 (sc88a/sot353) 3000 units/ 7 tape & reel ncp512sq30t1 3.0 lcp (sc 88a/sot 353) 7 ta e & reel ncp512sq33t1 3.3 lcq ncp512sq50t1 5.0 lcr *additional voltages in 100 mv steps are available upon request by contacting your on semiconductor representative.
ncp512 http://onsemi.com 10 package dimensions sc705/sc88a/sot353 sq suffix case 419a02 issue f notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. 419a-01 obsolete. new standard 419a-02. dim a min max min max millimeters 1.80 2.20 0.071 0.087 inches b 1.15 1.35 0.045 0.053 c 0.80 1.10 0.031 0.043 d 0.10 0.30 0.004 0.012 g 0.65 bsc 0.026 bsc h --- 0.10 --- 0.004 j 0.10 0.25 0.004 0.010 k 0.10 0.30 0.004 0.012 n 0.20 ref 0.008 ref s 2.00 2.20 0.079 0.087 b 0.2 (0.008) mm 12 3 4 5 a g s d 5 pl h c n j k b
ncp512 http://onsemi.com 11 notes
ncp512 http://onsemi.com 12 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 any particular purpose, nor does scillc assume any liability arising out 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. atypicalo parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso 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 indem nify and hold scillc and its of ficers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and re asonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized u se, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employ er. publication ordering information japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. ncp512/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com n. american technical support : 8002829855 toll free usa/canada

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