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rev. 1.0 december 2015 www.aosmd.com page 1 of 16 AOZ2262QI-15 28v/10a synchronous ezbuck tm regulator general description the AOZ2262QI-15 is a high-efficiency, easy-to-use dc/ dc synchronous buck regulator that operates up to 28v. the device is capable of supplying 10a of continuous output current with an output voltage adjustable down to 0.8v (1.0%). a proprietary constant on-time pwm control with input feed-forward results in ultra-fast transient response while maintaining relative ly constant switching frequency over the entire input voltage range. the on-time can be externally programmed up to 2.6s. the device features multiple protection functions such as v cc under-voltage lockout, c ycle-by-cycle current limit, output over-voltage protecti on, short-circuit protection, and thermal shutdown. the AOZ2262QI-15 is available in a 4mm x 4mm qfn- 22l package and is rated over a -40c to +85c ambient temperature range. features ? wide input voltage range ? 2.7v to 28v ? 10a continuous output current ? output voltage adjustable down to 0.8v (1.0%) ? low r ds(on) internal nfets ? 22m high-side ? 8m low-side ? constant on-time wit h input feed-forward ? programmable on-time up to 2.6s ? selectable pfm light load operation ? ceramic capacitor stable ? adjustable soft start ? ripple reduction ? power good output ? integrated bootstrap diode ? cycle-by-cycle current limit ? short-circuit protection ? thermal shutdown ? thermally enhanced 4mm x 4mm qfn-22l package applications ? portable computers ? compact desktop pcs ? servers ? graphics cards ? set-top boxes ? lcd tvs ? cable modems ? point-of-load dc/dc converters ? telecom/networking/datacom equipment
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 2 of 16 typical application recommended start-up sequence ordering information aos green products use reduced levels of halogens, and are also rohs compliant. please visit www.aosmd.com/media/ aosgreenpolicy.pdf for additional information. part number ambient temperature range package environmental AOZ2262QI-15 -40c to +85c 22-pin 4mm x 4mm qfn green product AOZ2262QI-15 input 2.7v to 28v output 1.05v, 10a c3 88f r2 r3 100k r1 c2 22f c5 0.1f in power good off on vcc pgood en pfm ss c ss r ton c4 4.7f bst lx fb agnd pgnd l1 1h ton 5v power ground analog ground vin vcc en 5v 5v 50s
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 3 of 16 option table pin configuration part number all protection ripple reduction max. on-time auto restart latch yes no 2.6s 1.3s aoz2262qi-10 v v v aoz2262qi-11 v v v aoz2262qi-12 v v v aoz2262qi-13 v v v aoz2262qi-14 v v v AOZ2262QI-15 v v v aoz2262qi-16 v v v aoz2262qi-17 v v v 1 22 21 20 19 18 789 11 10 2 3 4 5 pgood in in in lx lx ss vcc bst pgnd lx en pfm agnd fb 22-pin 4mm x 4mm qfn (top view) 17 16 15 13 12 lx lx pgnd pgnd pgnd pgnd lx in 14 6 ton
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 4 of 16 pin description pin number pin name pin function 1 pgood power good signal output. pgoo d is an open-drain output used to indicate the status of the output voltage. it is internally pulled low when th e output voltage is 15% lower than the nominal regulation voltage for or 20% higher than the nominal regulation voltage. pgood is pulled low during soft-start and shut down. 2en enable input. the AOZ2262QI-15 is enabled when en is pulled high. the device shuts down when en is pulled low. 3pfm pfm selection input. connect pfm pin to v cc for forced pwm operation. connect pfm pin to ground for pfm operation to improve light load efficiency. 4 agnd analog ground. 5fb feedback input. adjust the output voltage wi th a resistive voltage-divider between the regulator?s output and agnd. 6 ton on-time setting input. connect a resistor between vin and ton to set the on time. 7, 8, 9 in supply input. in is the regulator in put. all in pins must be connected together. 12, 13, 14, 15, 19 pgnd power ground. 10, 11, 16, 17, 18 lx switching node. 20 bst bootstrap capacitor connection. the AOZ2262QI-15 includes an internal bootstrap diode. connect an external capacitor between bst and lx as shown in the typical appli- cation diagram. 21 vcc supply input for analog functions. bypass vcc to agnd with a 1f~10f ceramic capacitor. place the capacitor close to vcc pin. 22 ss soft-start time setting pin. connect a capacitor between ss and agnd to set the soft-start time.
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 5 of 16 absolute maximum ratings exceeding the absolute maximum ratings may damage the device. note: 1. devices are inherently esd s ensitive, handling precautions are required. human body model rating: 1.5k in series with 100pf. 2. lx to pgnd transient (t<20ns) ------ -7v to v in + 7v. maximum operating ratings the device is not guaranteed to operate beyond the maximum operating ratings. parameter rating in, ton to agnd -0.3v to 30v lx to agnd (2) -0.3v to 30v bst to agnd -0.3v to 36v ss, pgood, fb, en, vcc, pfm to agnd -0.3v to 6v pgnd to agnd -0.3v to +0.3v junction temperature (t j ) +150c storage temperature (t s ) -65c to +150c esd rating (1) 2kv parameter rating supply voltage (v in ) 2.7v to 28v output voltage range 0.8v to 0.85*v in ambient temperature (t a ) -40c to +85c package thermal resistance ( ja )40c/w symbol parameter conditions min. typ. max units v in in supply voltage 2.7 28 v v uvlo under-voltage lockout threshold of vcc vcc rising vcc falling 4.2 3.9 v v i q quiescent supply current of vcc i out = 0a, v en > 2v, pfm mode 0.15 ma i off shutdown supply current v en = 0v 120 a v fb feedback voltage t a = 25c t a = 0c to 85c 0.792 0.788 0.800 0.800 0.808 0.812 v v load regulation 0.5 % line regulation 1% i fb fb input bias current 200 na enable v en en input threshold off threshold on threshold 1.6 0.5 v v v en_hys en input hysteresis 100 mv pfm control v pfm pfm input threshold pfm mode threshold force pwm threshold 2.5 0.5 v v v pfmhys pfm input hysteresis 100 mv modulator t on on time r ton = 100k , v in = 12v 200 ns t on _ min minimum on time 100 ns t on _ max maximum on time 2.6 s t off _ min minimum off time 300 ns electrical characteristics t a = 25c, v in = 12v, v cc = 5v, en = 5v, unless otherwise specified. specifications in bold indicate a temperature range of -40c to +85c.
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 6 of 16 soft-start i ss _ out ss source current v ss = 0v c ss = 0.001f to 0.1f 71115a power good signal v pg_low pgood low voltage i ol = 1ma 0.5 v pgood leakage current 1 a v pgh pgood threshold (low level to high level) fb rising 90 % v pgl pgood threshold (high level to low level) fb rising fb falling 120 85 % % pgood threshold hysteresis 5 % under voltage and over voltage protection v pl under voltage threshold fb falling 70 % t pl under voltage delay time 32 s v ph over voltage threshold fb rising 120 % power stage output r ds(on) high-side nfet on-resistance v in = 12v, v cc = 5v 22 m high-side nfet leakage v en = 0v, v lx = 0v 10 a r ds(on) low-side nfet on-resistance v lx = 12v, v cc = 5v 8 m low-side nfet leakage v en = 0v 10 a over-current and thermal protection i lim current limit v cc = 5v 15 a thermal shutdown threshold t j rising t j falling 150 100 c c symbol parameter conditions min. typ. max units electrical characteristics (continued) t a = 25c, v in = 12v, v cc = 5v, en = 5v, unless otherwise specified. specifications in bold indicate a temperature range of -40c to +85c.
rev. 1.0 december 2015 www.aosmd.com page 7 of 16 AOZ2262QI-15 functional block diagram ton generator isense ilim error comp ilim comp 0.8v isence (ac) fb decode otp reference & bias bst pg logic lx agnd pgnd isense isense (ac) current information processing vcc in pgood uvlo ton timer q toff_min s r q timer q ton pfm fb ss en vcc light load threshold isense light load comp en
rev. 1.0 december 2015 www.aosmd.com page 8 of 16 AOZ2262QI-15 typical performance characteristics circuit of typical application. t a = 25c, v in = 19v, v out = 1.05v, fs = 500khz un less otherwise specified. normal operation vo ripple 10mv/div vlx 10v/div ilx 5a/div 5s/div load transient 0a to 10a vo ripple 50mv/div ilx 5a/div 500s/div full load start-up vlx 20v/div en 5v/div vo 1v/div llx 5a/div vlx 20v/div ilx 10a/div vo 500mv/div 1ms/div short circuit protection 20s/div
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 9 of 16 detailed description the AOZ2262QI-15 is a high-efficiency, easy-to-use, synchronous buck regulator optimized for notebook computers. the regulator is capable of supplying 10a of continuous output current with an output voltage adjustable down to 0.8v. the programmable on-time from 100ns to 2.6s, enables optimizing the configuration for pcb area and efficiency. the input voltage of AOZ2262QI-15 can be as low as 2.7v. the highest input voltage of AOZ2262QI-15 can be 28v. constant on-time pwm with input feed-forward control scheme results in ul tra-fast transient response while maintaining relatively constant switching frequency over the entire input range. true ac current mode control scheme guarantees the regulator can be stable with a ceramic output capacitor. the switching frequency can be externally programmed. pr otection features include v cc under-voltage lockout, current limit, output over voltage and under voltage protection, short-circuit protection, and thermal shutdown. the AOZ2262QI-15 is available in 22-pin 4mm x 4mm qfn package. enable and soft start the AOZ2262QI-15 has external soft start feature to limit in-rush current and ensure the output voltage ramps up smoothly to regulation voltage. a soft start process begins when v cc rises to 4.5v and voltage on en pin is high. an internal current source charges the external soft start capacitor; the fb voltage follows the voltage of soft start pin (v ss ) when it is lower than 0.8v. when v ss is higher than 0.8v, the fb voltage is regulated by internal precise band-gap voltage (0.8v). when v ss is higher than 3.3v, the pgood signal is high. the soft start time can be calculated by the following formula: t ss (s) = 330 x c ss (nf) if c ss is 1nf, the soft start time will be 330s; if c ss is 10nf, the soft start time will be 3.3ms. figure 1. soft start sequence of AOZ2262QI-15 constant-on-time pwm control with input feed-forward the control algorithm of AOZ2262QI-15 is constant-on- time pwm control with input feed-forward. the simplified control schemati c is shown in figure 2. figure 2. simplified control schematic of AOZ2262QI-15 the high-side switch on-time is determined solely by a one-shot whose pulse width can be programmed by one external resistor and is inversely proportional to input voltage (in). the one-shot is triggered when the internal 0.8v is lower than the co mbined information of fb voltage and the ac current information of inductor, which is processed and obtained through the sensed lower-side mosfet current once it turns on. the added ac current information can help the st ability of constant-on time control even with pure ceramic output capacitors, which have very low esr. the ac current information has no dc offset, which does not cause offset with output load change, which is fundamentally different from other v 2 constant-on time control schemes. the constant-on-time pwm control architecture is a pseudo-fixed frequency with input voltage feed-forward. the internal circuit of AOZ2262QI-15 sets the on-time of high-side switch inversely proportional to the in. to achieve the flux balance of inductor, the buck converter has the equation: once the product of v in x t on is constant, the switching frequency keeps constant and is independent with input voltage. an external resistor between the in and ton pin sets the switching on-time accordin g to the following curves: 0.8v fb voltage/ ac current information comp programmable one-shot in pwm + C t on r ton () v in v () ------------------------ - (1) f sw v out v in t on -------------------------- - = (2) v ss =0.8v vout vss pgood v ss =3.3v
rev. 1.0 december 2015 www.aosmd.com page 10 of 16 AOZ2262QI-15 figure 3. t on vs. r ton curves for AOZ2262QI-15 a further simplified equation will be: if v out is 1.05v, v in is 19v, and set f s = 500khz. according to equation 3, t on = 110ns is needed. finally, use the t on to r ton curve, we can find out r ton is 82k . this algorithm results in a nearly constant switching frequency despite the lack of a fixed-frequency clock generator. true current mode control the constant-on-time contro l scheme is intrinsically unstable if output capacitor ?s esr is not large enough as an effective curren t-sense resistor. ceramic capacitors usually cannot be used as output capacitor. the AOZ2262QI-15 senses the low-side mosfet current and processes it into dc and ac current information using aos proprietary technique. the ac current information is decoded and added on the fb pin on phase. with ac current information, the stability of constant-on-time control is significantly improved even without the help of output capacitor?s esr, and thus the pure ceramic capacitor solution can be applicable. the pure ceramic capaci tor solution can significantly reduce the output ripple (no esr caused overshoot and undershoot) and less board area design. current-limit protection the AOZ2262QI-15 uses the current-limit protection by using r dson of the lower mosfet current sensing. to detect real current information, a minimum constant-off (300ns typical) is implemented after a constant-on time. if the current exceeds the current-limit threshold, the pwm controller is not allowed to in itiate a new cycle. the actual peak current is greater than the current-limit threshold by an amount equal to the inductor ripple current. therefore, the exact current-limit char acteristic and maximum load capability are a function of the inductor va lue as well as input and output voltages. th e current limit will keep the low-side mosfet on and will not allow an other high- side on-time, until the current in the low-side mosfet reduces below the current limit. after 64 switching cycles, the aoz2262qi- 15 considers this is a true failed condition and therefore, turns-off both high-side and low-side mosfets and shuts down. the AOZ2262QI-15 enters hiccup mode to periodically restart the part. when the current limit protection is removed, the AOZ2262QI-15 restarts again. output voltage under-voltage protection if the output voltage is lowe r than 70% by over-current or short circuit, the AOZ2262QI-15 will wait for 32s (typical) and turns-off both high-side and low-side mosfets and shuts down. when the output voltage under-voltage protection is removed, the AOZ2262QI-15 restarts again. output voltage over-voltage protection the threshold of ovp is set 20% higher than 0.8v. when the v fb voltage exceeds the o vp threshold, the high- side mosfet is turned-off and the low-side mosfets is turned-on at 1s, then shuts down. when the output voltage under-voltage protection is removed, the AOZ2262QI-15 restarts again. power good output the power good (pgood) output, which is an open drain output, requires the pull-up resistor. when the output voltage is 15% below than the nominal regulation voltage, the pgood is pu lled low. when the output voltage is 20% higher than the nominal regulation voltage, the pgood is also pulled low. f sw khz () v out v () v in v () t on ns () ----------------------------------------------- - 10 6 = (3) on-time vs. on-time resistance (@ vin=5v~15v) 60 74 88 102 116 130 144 158 172 186 200 1130 1064 998 932 866 800 734 668 602 536 470 404 338 272 206 140 on-time resistance (k) on-time (ns) vin=5v vin=7v vin=9v vin=11v vin=13v vin=15v on-time vs. on-time resistance (@ vin=17v~28v) 60 74 88 102 116 130 144 158 172 186 200 315 299 283 267 251 235 219 203 187 171 155 139 123 107 91 75 on-time resistance (k) on-time (ns) vin=17v vin=19v vin=21v vin=24v vin=26v vin=28v
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 11 of 16 when combined with the under-voltage-protection circuit, this current limit method is effective in almost every circumstance. application information the basic AOZ2262QI-15 application circuit is shown in page 2. component selection is explained below. input capacitor the input capacitor must be connected to the in pins and pgnd pin of the AOZ2262QI-15 to maintain steady input voltage and filter out the pulsing input current. a small decoupling capacitor, usually 1f, should be connected to the vcc pin and agnd pin for stable operation of the AOZ2262QI-15. the voltage rating of input capacitor must be greater than maximu m input voltage plus ripple voltage. the input ripple voltage can be approximated by equation below: since the input current is discontinuous in a buck converter, the current stre ss on the input capacitor is another concern when selecting the capacitor. for a buck circuit, the rms value of input capacitor current can be calculated by: if let m equal the conversion ratio: the relation between the input capacitor rms current and voltage conversion ratio is calculated and shown in figure 4. it can be seen that when v o is half of v in , c in is under the worst current stress. the worst current stress on c in is 0.5 x i o . figure 4. i cin vs. voltage conversion ratio for reliable operation and best performance, the input capacitors must have current rating higher than i cin-rms at worst operating conditions. ceramic capacitors are preferred for input capacito rs because of their low esr and high ripple current rating. depending on the application circuits, other low esr tantalum capacitor or aluminum electrolytic capacitor may also be used. when selecting ceramic capacitors, x5r or x7r type dielectric ceramic capacitors are preferred for their better temperature and voltage charac teristics. note that the ripple current rating from capacitor manufactures is based on certain amount of life time. further de-rating may be necessary for practical design requirement. inductor the inductor is used to supply constant current to output when it is driven by a swit ching voltage. for given input and output voltage, induct ance and switching frequency together decide the inductor ripple current, which is: the peak inductor current is: high inductance gives low inductor ripple current but requires a larger size inductor to avoid saturation. low ripple current reduces inductor core losses. it also reduces rms current through inductor and switches, which results in less conduc tion loss. usually, peak to peak ripple current on inductor is designed to be 30% to 50% of output current. when selecting the inductor, make sure it is able to handle the peak current without saturation even at the highest operating temperature. v in i o fc in ----------------- 1 v o v in -------- - ? ?? ?? ?? v o v in -------- - = i cin_rms i o v o v in -------- - 1 v o v in -------- - ? ?? ?? ?? = v o v in -------- - m = i l v o fl ---------- - 1 v o v in -------- - ? ?? ?? ?? = i lpeak i o i l 2 -------- + = 0 0.1 0.2 0.3 0.4 0.5 0 0.5 1 m i cin_rms (m) i o
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 12 of 16 the inductor takes the highest current in a buck circuit. the conduction loss on the inductor needs to be checked for thermal and efficiency requirements. surface mount inductors in different shapes and styles are available from coilcraft, elytone and murata. shielded inductors are sma ll and radiate less emi noise, but they do cost more than unshielded inductors. the choice depends on emi requirement, price and size. output capacitor the output capacitor is sele cted based on the dc output voltage rating, output ripple voltage specification and ripple current rating. the selected output capacitor must have a higher rated voltage specification than the maximum desired output voltage including ripple. de-rating needs to be considered for long term reliability. output ripple voltage specif ication is another important factor for selecting the output capacitor. in a buck con- verter circuit, output ripple voltage is determined by inductor value, switching fr equency, output capacitor value and esr. it can be calculated by the equation below: where , c o is output capacitor value and esr co is the equivalent series resistor of output capacitor. when a low esr ceramic capacitor is used as output capacitor, the impedance of the capacitor at the switching frequency dominates. output ripple is mainly caused by capacitor value and inductor ripple current. the output ripple voltage calculation can be simplified to: if the impedance of esr at switching frequency dominates, the output ripple voltage is mainly decided by capacitor esr and inductor ripple current. the output ripple voltage calculation can be further simplified to: for lower output ripple voltage across the entire operating temperature range, x5r or x7r dielectric type of ceramic, or other low esr tantalum are recommended to be used as output capacitors. in a buck converter, output capacitor current is continuous. the rms current of output capacitor is decided by the peak to peak inductor ripple current. it can be calculated by: usually, the ripple current rating of the output capacitor is a smaller issue because of the low current stress. when the buck inductor is selected to be very small and inductor ripple current is high, the output capacitor could be overstressed. thermal management and layout consideration in the AOZ2262QI-15 buck re gulator circuit, high pulsing current flows through two ci rcuit loops. the first loop starts from the input capacito rs, to the vin pin, to the lx pins, to the filter inductor, to the output capacitor and load, and then returns to the input capacitor through ground. current flows in the first loop when the high side switch is on. the second loop starts from the inductor, to the output capacitors and load, to the low side switch. current flows in the seco nd loop when the low side switch is on. in pcb layout, minimizing th e two loops area reduces the noise of this circuit and improves efficiency. a ground plane is strongly recommended to connect the input capacitor, output capacitor and pgnd pin of the AOZ2262QI-15. in the AOZ2262QI-15 buck re gulator circuit, the major power dissipating components are the AOZ2262QI-15 and output inductor. the total power dissipation of the converter circuit can be measured by input power minus output power. the power dissipation of inductor can be approximately calculated by output current and dcr of inductor and output current. the actual junction temper ature can be calculated with power dissipation in the AOZ2262QI-15 and thermal impedance from junction to ambient. the maximum junction temperature of AOZ2262QI-15 is 150oc, which limits the maxi mum load current capability. the thermal performance of the AOZ2262QI-15 is strongly affected by the pcb layout. extra care should be v o i l esr co 1 8 fc o ------------------------- + ?? ?? = v o i l 1 8 fc o ------------------------- = v o i l esr co = i co_rms i l 12 ---------- = p total_loss v in i in v o i o ? = p inductor_loss i o 2 r inductor 1.1 = t junction p total_loss p inductor_loss ? () ja =
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 13 of 16 taken by users during design process to ensure that the ic will operate under the recommended environmental conditions. layout considerations several layout tips are listed below for the best electric and thermal performance. 1. the lx pins and pad are connected to internal low side switch drain. they are low resistance thermal conduction path and most noisy switching node. connect a large copper plane to lx pin to help thermal dissipation. 2. the in pins and pad are connected to internal high side switch drain. they are also low resistance thermal conduction path. connect a large copper plane to in pins to help thermal dissipation. 3. input capacitors should be connected to the in pin and the pgnd pin as close as possible to reduce the switching spikes. 4. decoupling capacitor c vcc should be connected to vcc and agnd as close as possible. 5. voltage divider r1 and r2 should be placed as close as possible to fb and agnd. 6. r ton should be connected as close as possible to pin 6 (ton pin). 7. a ground plane is preferred; pin 19 (pgnd) must be connected to the ground plane through via. 8. keep sensitive signal traces such as feedback trace far away from the lx pins. 9. pour copper plane on all unused board area and connect it to stable dc nodes, like vin, gnd or vout. !!!!!!!!!!!!!!!!!!!! pgnd 3*22' (1 3)0 $*1' )% 721 , ,1 ,1 /; 3*1' %67 9&& 66 /; /; /; pgnd pgnd ,1 pgnd ,1 /; /; pgnd / ; / ; / ; / ; / ; / ; , , 1 , , , 1 , 1 vin / vout 9 & & 1 ) vout , 1
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 14 of 16 package dimensions, qf n 4x4, 22 lead ep2_s top view side view bottom view notes: 1. controlling dimensions are in millimeters. converted inch dimensions are not necessarily exact. 2. tolerance: 0.05 unless otherwise specified. 3. radius on all corners is 0.152 max., unless otherwise specified. 4. package wrapage: 0.012 max. 5. no plastic flash allowed on the top and bottom lead surface. 6. pad planarity: 0.102 7. crack between plastic body and lead is not allowed. recommended land pattern dimensions in millimeters dimensions in inches unit: mm symbols min. typ. max. a a1 a2 e e1 e2 e3 d d1 d2 d3 l l1 l2 l3 l4 l5 b e 0.80 0.00 3.90 2.95 1.65 2.95 3.90 0.65 0.75 1.10 0.35 0.57 0.23 0.57 0.30 0.17 0.20 0.90 0.2 ref 4.00 3.05 1.75 3.05 4.00 0.75 0.85 1.20 0.40 0.62 0.28 0.62 0.35 0.27 0.25 0.50 bsc 1.00 0.05 4.10 3.15 1.85 3.15 4.10 0.85 0.95 1.30 0.45 0.67 0.33 0.67 0.40 0.37 0.30 symbols min. typ. max. a a1 a2 e e1 e2 e3 d d1 d2 d3 l l1 l2 l3 l4 l5 b e 0.031 0.000 0.153 0.116 0.065 0.116 0.153 0.026 0.029 0.043 0.014 0.022 0.009 0.022 0.012 0.007 0.008 0.035 0.008 ref 0.157 0.120 0.069 0.120 0.157 0.030 0.033 0.047 0.016 0.024 0.011 0.024 0.014 0.011 0.010 0.020 bsc 0.039 0.002 0.161 0.124 0.073 0.124 0.161 0.034 0.037 0.051 0.018 0.026 0.013 0.026 0.016 0.015 0.012 d2 d3 l5 l1 l e3 b l3 d1 d1 l4 l2 e2 e1 e l5 d pin #1 dot by marking e a1 a a2 0.60 0.50 0.45 0.25 0.25 0.22 3.10 2.75 3.10 3.43 0.27 0.75 0.85 0.25 0.75 1.20 1.00 0.04
rev. 1.0 december 2015 www.aosmd.com page 15 of 16 AOZ2262QI-15 tape and reel dimensions, qfn 4x4 carrier tape reel tape size 12mm reel size ?330 m ?330.0 2.0 n ?79.0 1.0 unit: mm g m w1 s k h n w v r trailer tape 300mm min. components tape orientation in pocket leader tape 500mm min. h ?13.0 0.5 w 12.4 +2.0/-0.0 w1 17.0 +2.6/-1.2 k 10.5 0.2 s 2.0 0.5 g r v leader/trailer and orientation unit: mm p1 d1 p2 b0 p0 d0 e2 e1 e a0 feeding direction package a0 b0 k0 ee1 e2 d0 d1 p0 p1 p2 t 4.35 0.10 0.10 4.35 0.10 1.10 1.50 1.50 12.00 0.10 1.75 0.05 5.50 0.10 8.00 0.10 4.00 0.05 2.00 0.05 0.30 0.30 +0.10/-0 min. qfn 4x4 (12mm) t k0
AOZ2262QI-15 rev. 1.0 december 2015 www.aosmd.com page 16 of 16 part marking part number code assembly lot code fab & assembly location year & week code z2262qif faywlt AOZ2262QI-15 (qfn4x4) part number aoz2262qi-10 aoz2262qi-11 aoz2262qi-12 aoz2262qi-13 aoz2262qi-14 AOZ2262QI-15 aoz2262qi-16 aoz2262qi-17 part number code of marking z2262qia z2262qib z2262qic z2262qid z2262qie z2262qif z2262qig z2262qih as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. legal disclaimer alpha and omega semiconductor makes no representations or warranties with respect to the accuracy or completeness of the informa tion provided herein and takes no liab ilities for the consequences of use of such information or any product described herein. alpha and om ega semiconductor reserves the right to make changes to such information at any time without further notice. this document does not constitute the grant of any intellectual property rights or representation of non-infringement of any third party?s intellectual property rights. life support policy alpha and omega semiconductor products ar e not authorized for use as critical components in life su pport devices or systems.

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