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? semiconductor components industries, llc, 2010 december, 2010 ? rev. 1 1 publication order number: ncp1521b/d ncp1522b 3 mhz, 600 ma step-down dc-dc converter high ? efficiency, low ripple, adjustable output v oltage the ncp1522b step ? down dc ? dc converter is a monolithic integrated circuit optimized for portable applications powered from one cell li ? ion or three cell alkaline/nicd/nimh batteries. the part, available in adjustable output voltage versions ranging from 0.9 v to 3.3 v, is able to deliver up to 600 ma. it uses synchronous rectification to increase efficiency and reduce external part count. the device also has a built ? in 3 mhz (nominal) oscillator which reduces component size by allowing smaller inductors and capacitors. automatic switching pwm/pfm mode offers improved system efficiency. additional features include integrated soft ? start, cycle ? by ? cycle current limiting and thermal shutdown protection. the ncp1522b is available in a space saving, low profile tsop5 and udfn6 packages. features ? up to 93% efficiency ? allow use of small external components ? source up to 600 ma ? 3 mhz switching frequency ? adjustable output voltage from 0.9 v to 3.3 v ? synchronous rectification for higher efficiency ? 2.7 v to 5.5 v input voltage range ? low quiescent current ? shutdown current consumption of 0.3 a ? thermal limit protection ? short circuit protection ? all pins are fully esd protected ? these are pb ? free devices typical applications ? cellular phones, smart phones and pdas ? digital still/video cameras ? mp3 players and portable audio systems ? wireless and dsl modems ? portable equipment ? usb powered devices gnd 2 vin 1 en 3 lx 5 fb 4 off on vin cin cout r1 r2 cff figure 1. typical application ? tsop ? 5 l vout gnd 2 en 1 vin 3 fb 6 gnd 4 off on r1 r2 vout 5 lx vin figure 2. typical application ? udfn6 cout cff l cin tsop ? 5 sn suffix case 483 http://onsemi.com marking diagram 1 5 device package shipping ? ordering information ncp1522bsnt1g tsop ? 5 (pb ? free) 3000/t ape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specification brochure, brd801 1/d. gan = specific device code a = assembly location y = year w = work week = pb ? free package (note: microdot may be in either location) 1 5 ganayw brm 1 2 3 6 5 4 udfn6 mu suffix case 517ab br = specific device code m = date code = pb ? free package (note: microdot may be in either location) ncp1522bmutbg udfn6 (pb ? free) 3000/t ape & reel
ncp1522b http://onsemi.com 2 0 100 200 300 400 500 600 efficiency (%) 50 55 60 65 70 75 80 85 90 95 100 i out, output current (ma) figure 3. efficiency vs. output current v out = 3.3 v v in = 4.2 v t a = 25 c gnd 2 vin 1 v battery 4.7 f en 3 enable logic control & thermal shutdown pwm/pfm control i limit reference voltage fb 4 lx 5 q1 4.7 f 18 pf r1 r2 2.2 h q2 figure 4. simplified block diagram
ncp1522b http://onsemi.com 3 pin function description pin tsop ? 5 pin udfn6 pin name type description 1 3 vin analog / power input power supply input for the pfet power stage, analog and digital blocks. the pin must be decoupled to ground by a 10 f ceramic capacitor. 2 2, 4 gnd analog / power ground this pin is the gnd reference for the nfet power stage and the analog sec- tion of the ic. the pin must be connected to the system ground. 3 1 en digital input enable for switching regulators. this pin is active high and is turned off by logic low on this pin. 4 6 fb analog input feedback voltage from the output of the power supply. this is the input to the error amplifier. 5 5 lx analog output connection from power mosfets to the inductor. figure 5. pin connections ? tsop ? 5 figure 6. pin connections ? udfn6 (top view) 1 2 3 5 4 vin gnd en lx fb 1 2 3 6 4 en gnd vin fb gnd pin connections 5 lx maximum ratings rating symbol value unit minimum voltage all pins v min ? 0.3 v maximum voltage all pins (note 2) v max 7.0 v maximum voltage en, fb, lx v max vin + 0.3 v thermal resistance, junction ? to ? air (with recommended soldering footprint) tsop ? 5 udfn6 r ja 300 260 c/w operating ambient temperature range t a ? 40 to 85 c storage temperature range t stg ? 55 to 150 c junction operating temperature t j ? 40 to 125 c latchup current maximum rating (t a = 85 c) (note 4) other pins lu 100 ma esd withstand voltage (note 3) human body model machine model v esd 2.0 200 kv v moisture sensitivity level (note 5) msl 1 per ipc 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. maximum electrical ratings are defined as those values beyond which damage to the device may occur at t a = 25 c. 2. according to jedec standard jesd22 ? a108b. 3. this device series contains esd protection and exceeds the following tests: human body model (hbm) per jedec standard: jesd22 ? a114. machine model (mm) per jedec standard: jesd22 ? a115. 4. latchup current maximum rating per jedec standard: jesd78. 5. jedec standard: j ? std ? 020a.
ncp1522b http://onsemi.com 4 electrical characteristics (typical values are referenced to t a = +25 c, min and max values are referenced ? 40 c to +85 c ambient temperature, unless otherwise noted, operating conditions v in = 3.6 v, v out = 1.2 v, unless otherwise noted.) rating pin symbol min typ max unit tsop udfn vin pin input voltage range 1 3 v in 2.7 ? 5.5 v quiescent current, pfm no switching 1 3 i q on ? 50 90 a standby current, en low 1 3 i q off ? 0.2 1.5 a under voltage lockout (v in falling) 1 3 v uvlo 2.2 2.4 2.55 v en pin positive going input high voltage threshold, en0 signal 3 1 v ih 1.2 ? ? v negative going input high voltage threshold, en0 signal 3 1 v il ? ? 0.4 v en high input current, en = 3.6 v 3 1 i enh ? 2.0 ? a output output voltage accuracy (note 6) ambient t emperature overtemperature range v out ? ? 3.0 1.0 2.0 ? 3.0 % minimum output voltage (note 7) v out ? 0.9 ? v maximum output v oltage v out ? 3.3 ? v output voltage load regulation overtemperature i out = 100 ma to 600 ma v out ? 0.0008 ? %/ma load transient response, rise/falltime 1 s 10 ma to 100 ma load step 200 ma to 600 ma load step v out ? ? 50 54 ? ? mv output voltage line regulation, i out = 100 ma, v in = 2.7 v to 5.5 v v out ? 0.08 ? % line transient response, i out = 100 ma, 3.6 v to 3.0 v line step (falltime=50 s) v out ? 2.0 ? mv pp output voltage ripple, i out = 300 ma (pwm mode) v out ? 1.0 ? mv output voltage ripple, i out = 0 ma (pfm mode) v out ? 8.0 ? mv peak inductor current 5 5 i lim ? 1200 ? ma oscillator frequency 5 5 f osc 2.4 3.0 3.6 mhz duty cycle 5 5 ? ? ? 100 % soft ? start time t start ? 320 500 s thermal shutdown threshold t sd ? 160 ? c thermal shutdown hysteresis t sdh ? 25 ? c power switches p ? channel on ? resistance rlxh ? 400 ? m n ? channel on ? resistance rlxl ? 400 ? m p ? channel leakage current i leakh ? 0.05 ? a n ? channel leakage current i leakl ? 0.01 ? a 6. the overall output voltage tolerance depends upon the accuracy of the external resistor (r1, r2). 7. for v out = 0.9 v, maximum input voltage do not exceed 5.2 v.
ncp1522b http://onsemi.com 5 table of graphs typical characteristics for step ? down converter figure i stb standby current vs. input voltage 7 i q quiescent current, pfm no switching vs. input voltage 8 v out output voltage accuracy vs. temperature 9, 10 eff efficiency vs. output current 11, 12, 13 freq switching frequency vs. input voltage 14 v out soft ? start vs. time 15 v out short circuit protection vs. time 16 v out line regulation vs. input voltage 17, 18 v out line t ransient vs. time 19, 20 v out load regulation vs. output current 21, 22 v out load t ransient vs. time 23, 24, 25, 26 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 2.5 3.0 3.5 4.0 4.5 5.0 figure 7. shutdown current vs. supply voltage standby current ( a) v in , input voltage (v) 44 46 48 50 52 54 56 2.5 3.0 3.5 4.0 4.5 5.0 5.5 figure 8. quiescent current pfm no switching vs. supply voltage quiescent current ( a) v in , input voltage (v) 5.5
ncp1522b http://onsemi.com 6 accuracy (%) figure 9. output voltage accuracy vs. temperature (v in = 3.6 v, v out = 1.2 v) temperature ( c) accuracy (%) figure 10. output voltage accuracy vs. temperature (v out = 1.2 v, i out = 200 ma) temperature ( c) efficiency (%) figure 11. efficiency vs. output current (v in = 3.6 v, t a = 25 c) i out , output current (ma) efficiency (%) figure 12. efficiency vs. output current (v out = 1.2 v, t a = 25 c) i out , output current (ma) ? 3.0 ? 2.0 ? 1.0 0 1.0 2.0 3.0 0 20 40 60 80 100 120 i out = 600 ma i out = 200 ma i out = 20 ma ? 3.0 ? 2.0 ? 1.0 0 1.0 2.0 3.0 0 20 40 60 80 100 120 v in = 2.7 v v in = 5.5 v v in = 3.6 v 100 200 300 400 500 600 0 50 55 60 65 70 75 80 85 90 95 100 v out = 0.9 v v out = 1.8 v v out = 3.3 v 50 55 60 65 70 75 80 85 90 95 100 0 100 200 300 400 500 600 v in = 5.5 v v in = 3.6 v v in = 2.7 v efficiency (%) figure 13. efficiency vs. output current (v in = 3.6 v, v out = 1.2 v) i out , output current (ma) frequency (mhz) figure 14. switching frequency vs. input voltage (v out = 1.2 v, i out = 300 ma) v in , input voltage (v) 50 55 60 65 70 75 80 85 90 95 100 0 100 200 300 400 500 600 25 c ? 40 c 85 c 2.4 2.6 2.8 3 3.2 3.4 3.6 2.5 3 3.5 4 4.5 5 5.5 25 c 85 c ? 40 c
ncp1522b http://onsemi.com 7 figure 15. typical soft ? start (v out = 1.2 v, i out = 250 ma) figure 16. short ? circuit protection (v in = 3.6 v, v out = 1.2 v) line regulation (%) figure 17. line regulation (v out = 1.2 v, i out = 300 ma) v in , input voltage (v) figure 18. line regulation (v out = 1.2 v, t a = 25 c) v in , input voltage (v) v out 500 mv/div i lx 100 mv/div v in 2 v/div time 100 s/div i lx 500 mv/div v out 200 mv/div time 10 ms/div ? 1 ? 0.8 ? 0.6 ? 0.4 ? 0.2 0 0.2 0.4 0.6 0.8 1 2.7 3.2 3.7 4.2 4.7 5.2 ? 40 c 25 c 85 c line regulation (%) ? 1 ? 0.8 ? 0.6 ? 0.4 ? 0.2 0 0.2 0.4 0.6 0.8 1 2.7 3.2 3.7 4.2 4.7 5.2 i out = 300 ma i out = 1 ma i out = 600 ma figure 19. 3.0 v to 3.6 v line transient (risetime = 50 s, v out = 1.2 v, i out = 100 ma, t a = 25 c) v out 20 mv/div v in 0.5 v/div figure 20. 3.6 v to 3.0 v line transient (risetime = 50 s, v out = 1.2 v, i out = 100 ma, t a = 25 c) v out 20 mv/div v in 0.5 v/div
ncp1522b http://onsemi.com 8 load regulation (%) figure 21. load regulation (v in = 3.6 v, v out = 1.2 v) i out , output current (ma) load regulation (%) figure 22. load regulation (v out = 1.2 v, t a = 25 c) figure 23. 10 ma to 100 ma load transient (v in = 3.6 v, v out = 1.2 v, t a = 25 c) figure 24. 100 ma to 10 ma load transient (v in = 3.6 v, v out = 1.2 v, t a = 25 c) v out 20 mv/div v out 20 mv/div i out 50 ma/div i out 20 ma/div i out , output current (ma) ? 3.0 ? 2.0 ? 1.0 0.0 1.0 2.0 3.0 0 100 200 300 400 500 600 25 c ? 40 c 85 c ? 3.0 ? 2.0 ? 1.0 0.0 1.0 2.0 3.0 0 100 200 300 400 500 600 v in = 5.5 v v in = 2.7 v v in = 3.6 v figure 25. 200 ma to 600 ma load transient (v in = 3.6 v, v out = 1.2 v, t a = 25 c) figure 26. 600 ma to 200 ma load transient (v in = 3.6 v, v out = 1.2 v, t a = 25 c) v out 20 mv/div i out 200 ma/div v out 20 mv/div i out 200 ma/div
ncp1522b http://onsemi.com 9 dc/dc operation description detailed description the ncp1522b uses a constant frequency, voltage mode step ? down architecture. both the main (p ? channel mosfet) and synchronous (n ? channel mosfet) switches are internal. the output voltage is set by an external resistor divider in the range of 0.9 v to 3.3 v and can source at least 600 ma. the ncp1522b works with two modes of operation; pwm/pfm depending on the current required. in pwm mode, the device can supply voltage with a tolerance of 3% and 90% efficiency or better. lighter load currents cause the device to automatically switch into pfm mode to reduce current consumption and extended battery life. additional features include soft ? start, undervoltage protection, current overload protection, and thermal shutdown protection. as shown in figure 1, only six external components are required. the part uses an internal reference voltage of 0.6 v. it is recommended to keep ncp1522b in shutdown mode until the input voltage is 2.7 v or higher. pwm operating mode in this mode, the outp ut voltage of the device is regulated by modulating the on ? time pulse width of the main switch q1 at a fixed 3 mhz frequency. the switching of the pmos q1 is controlled by a flip ? flop driven by the internal oscillator and a comparator that compares the error signal from an error amplifier with the sum of the sensed current signal and compensation ramp. the driver switches on and off the upper side transistor (q1) and switches the lower side transistor in either on state or in current source mode. at the beginning of each cycle, the main switch q1 is turned on by the rising edge of the internal oscillator clock. the inductor current ramps up until the sum of the current sense signal and compensation ramp becomes higher than the error amplifier?s voltage. once this has occurred, the pwm comparator resets the flip ? flop, q1 is turned off while the synchronous switch q2 is turned in its current source mode. q2 replaces the external schottky diode to reduce the conduction loss and improve the efficiency. to avoid overall power loss, a certain amount of dead time is introduced to ensure q1 is completely turned off before q2 is being turned on. figure 27. pwm switching waveform (v in = 3.6 v, v out = 1.2 v, i out = 600 ma) 200 ns/div v out 10 mv/div i lx 100 ma/div v lx 2 v/div pfm operating mode under light load conditions, the ncp1522b enters in low current pfm mode operation to reduce power consumption. the output regulation is implemented by pulse frequency modulation. if the output voltage drops below the threshold of pfm comparator, a new cycle will be initiated by the pfm comparator to turn on the switch q1. q1 remains on during the minimum on time of the structure while q2 is in its current source mode. the peak inductor current depends upon the drop between input and output voltage. after a short dead time delay where q1 is switched off, q2 is turned in its on state. the negative current detector will detect when the inductor current drops below zero and sends the signal to turn q2 to current source mode to prevent a too large deregulation of the output voltage. when the output voltage falls below the threshold of the pfm comparator, a new cycle starts immediately. figure 28. pfm switching w aveforms (v in = 3.6 v, v out = 1.2 v, i out = 0 ma, temp = 25 c) v out v lx
ncp1522b http://onsemi.com 10 soft ? start the ncp1522b uses soft ? start to limit the inrush current when the device is initially powered up or enabled. soft ? start is implemented by gradually increasing the reference voltage until it reaches the full reference voltage. during startup, a pulsed current source charges the internal soft ? start capacitor to provide gradually increasing reference voltage. when the voltage across the capacitor ramps up to the nominal reference voltage, the pulsed current source will be switched off and the reference voltage will switch to the regular reference voltage. cycle ? by ? cycle current limitation from the block diagram, an i lim comparator is used to realize cycle ? by ? cycle current limit protection. the comparator compares the lx pin voltage with the reference voltage, which is biased by a constant current. if the inductor current reaches the limit, the i lim comparator detects the lx voltage falling below the reference voltage and releases the signal to turn off the switch q1. the cycle ? by ? cycle current limit is set at 1200 ma (nom). low dropout operation the ncp1522b offers a low input to output voltage difference. the ncp1522b can operate at 100% duty cycle. in this mode the pmos (q1) remains completely on. the minimum input voltage to maintain regulation can be calculated as: v in(min) v out(max) (eq. 1) (i out (r ds(on) r inductor )) ? v out : output voltage (volts) ? i out : max output current ? r ds(on) = p ? channel switch r ds(on) ? r inductor : inductor resistance (dcr) undervoltage lockout the input voltage v in must reach 2.4 v (typ) before the ncp1522b enables the dc/dc converter output to begin the start up sequence (see soft ? start section). the uvlo threshold hysteresis is typically 100 mv. shutdown mode forcing this pin to a voltage below 0.4 v will shut down the ic. in shutdown mode, the internal reference, oscillator and most of the control circuitries are turned of f. therefore, the typical current consumption will be 0.3 a (typical value). applying a voltage above 1.2 v to en pin will enable the device for normal operation. the typical threshold is around 0.7 v. the device will go through soft ? start to normal operation. thermal shutdown internal thermal shutdown circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. if the junction temperature exceeds 160 c, the device shuts down. in this mode switch q1 and q2 and the control circuits are all turned off. the device restarts in soft ? start after the temperature drops below 135 c. this feature is provided to prevent catastrophic failures from accidental device overheating, and it is not intended as a substitute for proper heatsinking. short circuit protection when the output is shorted to ground, the device limits the inductor current. the duty ? cycle is minimum and the consumption on the input line is 300 ma (typ). when the short circuit condition is removed, the device returns to the normal mode of operation.
ncp1522b http://onsemi.com 11 application information output voltage selection the output voltage is programmed through an external resistor divider connected from v out to fb then to gnd. for low power consumption and noise immunity, the resistor from fb to gnd (r2) should be in the [100 k ? 600 k] range. if r2 is 200 k given the v fb is 0.6 v, the current through the divider will be 3.0 a. the formula below gives the value of v out , given the desired r1 and the r1 value: v out v fb (1 r1 r2 ) (eq. 2) ? v out : output voltage (volts) ? v fb : feedback voltage = 0.6 v ? r1: feedback resistor from v out to fb ? r2: feedback resistor from fb to gnd input capacitor selection in pwm operating mode, the input current is pulsating with a large switching noise. using an input bypass capacitor can reduce the peak current transients drawn from the input supply source, thereby reducing switching noise significantly. the capacitance needed for the input bypass capacitor depends on the source impedance of the input supply. the maximum rms current occurs at 50% duty cycle with maximum output current, which is i out_max /2. for ncp1522b, a low profile ceramic capacitor of 4.7 f should be used for most of the cases. for effective bypass results, the input capacitor should be placed as close as possible to the v in pin. table 1. list of input capacitors murata grm188r60j475ke 4.7 f grm21br71c475ka taiyo yuden jmk212by475mg 4.7 f tdk c2012x5roj475kb 4.7 f c1632x5roj475kt output l ? c filter design considerations the ncp1522b operates at 3 mhz frequency and uses voltage mode architecture. the correct selection of the output filter ensures good stability and fast transient response. due to the nature of the buck converter, the output l ? c filter must be selected to work with internal compensation. for ncp1522b, the internal compensation is internally fixed and it is optimized for an output filter of l = 2.2 h and c out = 4.7 f. the corner frequency is given by: f c 1 2 l c out (eq. 3) 1 2 2.2 h 4.7 f 49 khz the device is intended to operate with inductance value of 2.2 h. if the corner frequency is moved, it is recommended to check the loop stability depending on the accepted output ripple voltage and the required output curret. take care to check the loop stability. the phase margin is usually higher than 45 . table 2. l ? c filter example inductance (l) output capacitor (c out ) 1.0 h 10 f 2.2 h 4.7 f inductor selection the inductor parameters directly related to device performances are saturation current and dc resistance and inductance value. the inductor ripple current ( i l ) decreases with higher inductance: i l v out l f sw 1 ? v out v in (eq. 4) ? i l: peak to peak inductor ripple current ? l: inductor value ? f sw: switching frequency the saturation current of the inductor should be rated higher than the maximum load current plus half the ripple current: i l(max) i o(max) i l 2 (eq. 5) ? i l(max): maximum inductor current ? i o(max): maximum output current the inductor?s resistance will factor into the overall efficiency of the converter. for best performance, the dc resistance should be less than 0.3 for good efficiency. table 3. list ofinductors coilcraft do1605 ? t series lpo3010 series fdk mipw3226 series tdk vlf3010at series taiyo yuden lq cbl2012 series
ncp1522b http://onsemi.com 12 output capacitor selection selecting the proper output capacitor is based on the desired output ripple voltage. ceramic capacitors with low esr values will have the lowest output ripple voltage and are strongly recommended. the output capacitor requires an x7r dielectric. the output ripple voltage in pwm mode is given by: v out i l 1 4 f sw c out esr (eq. 6) ? v out : output voltage ripple in pwm mode ? i l: peak to peak inductor ripple current ? f sw : switching frequency ? c out : output capacitor ? esr: output capacitor serial resistor table 4. list of output capacitors murata grm188r60j475ke 4.7 f grm21br71c475ka grm188r60oj106me 10 f grm21br60j106me19l taiyo yuden jmk212by475mg 4.7 f jmk212bj106mg 10 f tdk c2012x5roj475kb 4.7 f c1632x5rojr75kt c2012x5roj106k 10 f feed ? forward capacitor selection the feed ? forward capacitor sets the feedback loop response and is critical to obtain good loop stability. given that the compensation is internally fixed, an 18 pf or higher ceramic capacitor is needed. choose a small ceramic capacitor x7r dielectric.
ncp1522b http://onsemi.com 13 package dimensions tsop ? 5 case 483 ? 02 issue h notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. maximum lead thickness includes lead finish thickness. minimum lead thickness is the minimum thickness of base material. 4. dimensions a and b do not include mold flash, protrusions, or gate burrs. 5. optional construction: an additional trimmed lead is allowed in this location. trimmed lead not to extend more than 0.2 from body. dim min max millimeters a 3.00 bsc b 1.50 bsc c 0.90 1.10 d 0.25 0.50 g 0.95 bsc h 0.01 0.10 j 0.10 0.26 k 0.20 0.60 l 1.25 1.55 m 0 10 s 2.50 3.00 123 54 s a g l b d h c j 0.7 0.028 1.0 0.039 mm inches scale 10:1 0.95 0.037 2.4 0.094 1.9 0.074 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting t echniques reference manual, solderrm/d. soldering footprint* 0.20 5x c ab t 0.10 2x 2x t 0.20 note 5 t seating plane 0.05 k m detail z detail z
ncp1522b http://onsemi.com 14 package dimensions udfn6 2x2, 0.65p case 517ab ? 01 issue b *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting t echniques reference manual, solderrm/d. soldering footprint* 0.47 0.40 0.65 1.70 2.30 1 dimensions: millimeters 6x 0.95 pitch 6x notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. coplanarity applies to the exposed pad as well as the terminals. c a seating plane d b e 0.10 c a3 a a1 2x 2x 0.10 c dim a min max millimeters 0.45 0.55 a1 0.00 0.05 a3 0.127 ref b 0.25 0.35 d 2.00 bsc d2 1.50 1.70 0.80 1.00 e 2.00 bsc e2 e 0.65 bsc k 0.25 0.35 l pin one reference 0.08 c 0.10 c 6x a 0.10 c l e e2 b b 3 6 6x 1 k 4 6x 6x 0.05 c 4x d2 bottom view 0.20 --- 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, in cluding 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 a pplications and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical e xperts. 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 prod uct could create a s ituation 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 officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney f ees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was neglig ent 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. ncp1522b/d 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 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 sales representative

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