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1 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 ge n e r a l d e scr ipt ion the AAT2782 provides three independently regulated dc outputs: two step-down (buck) regulators and a single low input voltage, low drop-out (ldo) regulator. the input voltage range for the step-down regulators is 2.7v to 5.5v, while the ldo regulator allows inputs from 1.5v to 5.5v. the low input voltage ldo regulator allows high efficiency, step-down, low noise outputs. in addi- tion, the ldo input may be connected to step-down outputs 1 or 2. the channel 1 and 2 step-down regulators can deliver up to 1200ma and 600ma output current, respectively. step-down output voltages are set with external resis- tors. switching frequency is set at 1.3mhz to ensure small external filtering components. current mode con- trol assures fast transient response and stable operation across the operating range. the channel 3 ldo regulator can deliver up to 400ma with -80db power supply rejec- tion ratio (psrr) and 65 v rms output noise with an optional bypass capacitor. the ldo output voltage is fac- tory set with a default voltage of 1.20v. independent enable and input pins are provided. the device consumes low quiescent current and provides high efficiency across the load range for maximum life in battery systems. the AAT2782 is available in the pb-free, 16-pin tdfn34 package and is rated over the -40c to 85c operating temperature range. fe a t u r e s v in range step-down (buck): 2.7v to 5.5v v in range low drop-out (ldo): 1.5v to 5.5v output voltage range: 0.6v to v in step-down output current: ? channel 1: 1200ma ? channel 2: 600ma ldo output current: ? channel 3: 400ma high efficiency with low r ds(on) switches ? step-down up to 97% ? ldo regulator up to 80% total quiescient current 170 a shutdown current: 1 a step-down converters ? 1.3mhz switching frequency ? current mode control ? cycle-by-cycle current limit ? high efficiency light-load mode operation ldo converter ? ultra low noise with bypass capacitor ? over-current protection 200 s internal soft start over-temperature protection tdfn34-16 low profile package -40c to 85c temperature range applica t ion s cellular and smartphones microprocessor / dsp core / io power pdas and handheld computers portable media players wireless data systems typica l applica t ion AAT2782 vp2 en2 agnd fb2 lx 2 v out1 1.2v, 1.2a v out2 1.7v, 0.6a v out3 1.2v, 400ma c210f byp out3 vin3 en3 ep c32.2f l2 2.2 h c5 4.7f r2 59 .0k r3 107k c7 0.01 f agnd vp1 en1 vin gnd1 fb1 lx1 c1 10 f c40.1f l1 1.5 h c8 10f r4 59 .0k r5 59 .0k v in 2.7v C5.5v gnd2 v in = v out2 gnd2 downloaded from: http:///
2 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 pin d e scr ipt ion s pin # sym bol fu n ct ion 1 fb2 feedback input pin for channel 2. connect an external resistor divider to this pin to program the output voltage to the desired value. 2 en3 enable channel 3 input. pull logic high to enable ldo channel 3 converter. pull logic low to disable. chan- nel 3 will turn on when en3 is high and channel 2 is in regulation. 3 vin input voltage pin. connect this pin to input voltage source. 4 agnd analog ground pin. connect to ground plane. 5 byp ldo bypass pin. connect a 10nf ceramic capacitor from this pin to ground plane for low output noise. 6 en2 enable channel 2 input. pull logic high to enable step-down channel 2 converter. pull logic low to disable. 7 en1 enable channel 1 input. pull logic high to enable step-down channel 1 converter. pull logic low to disable. 8 fb1 channel 1 feedback pin internally set to 0.6v. connect resistor divider and optional feed-forward capaci- tor to this pin to set the channel 1 voltage and adjust transient load response (see table 1). 9 lx1 channel 1 converter switching pin. connect channel 1 inductor to this pin. inductor value is determined by output voltage (see table 2). 10 gnd1 power return pin for output 1 step-down converter. connect returns of channel 1 input and output ca- pacitors close to this pin for best noise performance. 11 vp1 input supply voltage pin for channel 1 step-down converter. connect the input capacitor close to this pin for best noise performance. 12 vp2 input supply voltage pin for channel 2 step-down converter. connect the input capacitor close to this pin for best noise performance. 13 gnd2 power return pin for channel 2 step-down converter. connect returns of channel 2 input and output ca- pacitors close to this pin for best noise performance. 14 lx2 channel 2 converter switching pin. connect output 2 inductor to this pin. inductor value is determined by output voltage (see table 2). 15 vin3 input supply voltage pin for output 3 low-noise ldo converter. connect the input capacitor close to this pin for best noise performance. 16 out3 channel 3 ldo step-down converter output pin. connect this pin to a 10 f ceramic capacitor. ep exposed pad. connect to ground as close as possible to the device. use properly sized vias for thermal coupling to the ground plane. see section on pcb layout guidelines. pin con figu r a t ion td fn 3 4 - 1 6 ( top vie w ) vin a gnd byp fb2 en3 3 en2 en1 fb1 lx2gnd2 vp2 out3vin3 vp1 gnd1 lx1 4 5 1 2 6 7 8 14 13 12 16 15 11 10 9 downloaded from: http:///
3 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 absolu t e m a x im u m ra t in gs 1 sym bol d e scr ipt ion va lu e un it s v in vp1, vp2, vin to gnd1, gnd2, agnd -0.3 to 6.0 v v in3 vin3 to gnd1, gnd2, agnd -0.3 to v in v v out3 out3 to gnd1, gnd2, agnd -0.3 to v in3 + 0.3 v v lx lx1, lx2 to gnd1, gnd2, agnd -0.3 to v in + 0.3 v v fb fb1, fb2, byp to gnd1, gnd2, agnd -0.3 to v in + 0.3 v v en en1, en2, en3 to gnd1, gnd2, agnd -0.3 to 6.0 v t j operating junction temperature range -40 to 150 c t lead maximum soldering temperature (at leads, 10 sec) 300 c th e r m a l i n for m a t ion sym bol d e scr ipt ion va lu e un it s p d maximum power dissipation 2 2.0 w ? ja thermal resistance 3 50 ? c/w 1. stresses above those listed in absolute maximum ratings may cause permanent damage to the device. functional operation at conditions other than the operating conditions specified is not implied. only one absolute maximum rating should be applied at any one time. 2. derate 20mw/c above 25c ambient temperature. 3. mounted on an fr4 board with exposed paddle connected to ground plane. downloaded from: http:///
4 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 ele ct r ica l ch a r a ct e r ist ics 1 v p1 = v p2 = v in = v in3 = 3.3v; v in3 = 1.8v, t a = -40c to 85c, unless noted otherwise. typical values are at t a = 25c. sym bol d e scr ipt ion con dit ion s m in typ m a x un it s ge n e r a l v in input voltage 2.7 5.5 v v uvlo uvlo threshold v p1 rising 2.7 v v p1 hysteresis 140 mv v p1 falling 2.1 v i q quiescent current no load; en1 = en2 = en3 = v in 300 a i shdn shutdown current en1 = en2 =en3 = gnd 1.0 a t sd over temperature shutdown threshold 130 c t hys over temperature shutdown hysteresis 20 c v il enable threshold low for en1, en2, and en3 0.6 v v ih enable threshold high for en1, en2, and en3 1.4 v i en enable input current v in = v p1 = v p2 = v en1 = v en2 = v en3 = 5.5v -1.0 1.0 a ch a n n e l 1 : 1 2 0 0 m a st e p- dow n ( bu ck ) con ve r t e r v p1 input voltage 2.7 5.5 v v out1 output voltage range 0.6 v p1 v v out1(tol) output voltage tolerance i out1 = 0 to 1200ma; v p1 = 2.7 to 5.5v -3.0 3.0 % v fb1 feedback pin voltage 0.591 0.6 0.609 v v loadreg1 load regulation i out1 = 0 to 1200ma 0.2 % v linereg1 line regulation v p1 = 2.7 to 5.5v 0.3 % i q1 quiescent current no load; en1 = v in ; en2 = en3 = gnd 75 a i lim1 p-channel current limit 1.7 a r ds(on)h1 high side switch on-resistance 250 m r ds(on)l1 low side switch on-resistance 190 m f osc1 oscillator frequency 1.3 mhz t s1 start-up time from enable to output regulation 200 s 1. the AAT2782 is guaranteed to meet performance specifications over the C40c to +85c operating temperature range and is assu red by design, characterization and correla- tion with statistical process controls. downloaded from: http:///
5 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 ele ct r ica l ch a r a ct e r ist ics 1 v p1 = v p2 = v in = v in3 = 3.3v; v in3 = 1.8v, t a = -40c to 85c, unless noted otherwise. typical values are at t a = 25c. sym bol d e scr ipt ion con dit ion s m in typ m a x un it s ch a n n e l 2 : 6 0 0 m a st e p- dow n ( bu ck ) con ve r t e r v p2 input voltage 2.7 5.5 v v out2 output voltage range 0.6 v p2 v v out2(tol) output voltage tolerance i out2 = 0 to 600ma; v p1 = 2.7 to 5.5v -3.0 3.0 % v fb2 feedback pin voltage 0.591 0.6 0.609 v v loadreg2 load regulation i out2 = 0 to 600ma 0.5 % v linereg2 line regulation v p2 = 2.7 to 5.5v 0.3 % i q2 quiescent current no load; en2 = v in ; en1 = en3 = gnd 75 a i lim2 p-channel current limit 1.7 a r ds(on)h2 high side switch on-resistance 250 m r ds(on)l2 low side switch on-resistance 190 m f osc2 oscillator frequency 1.3 mhz t s2 start-up time from enable to output regulation 200 s ch a n n e l 3 : 4 0 0 m a low d r opou t ( ld o) con ve r t e r v in3 input voltage 1.7 v in v v do3 dropout voltage i out3 = 150ma; v out3 > 1.20v 140 mv i out3 = 400ma; v out3 > 1.20v 300 v out3 ldo output voltage tolerance v in3 = v out3 + v do3 to 5.5v; i out3 = 0ma to 400ma 1.164 1.200 1.236 v i out3 max output current v out3 = 1.2v 400 ma i sc short-circuit current v out3 < 0.4v 1.1 a i q quiescent current no load; en1 = en2 = gnd; en3 = v in 85 a t s start-up time from enable to output regulation 200 s psrr power supply rejection ratio 10hz, i out3 = 10ma 85 db 3khz, i out3 = 10ma 80 db 30khz, i out3 = 10ma 60 db 300khz, i out3 = 10ma 55 db e n output noise bw = 100hz to 300khz, c byp = 10nf, i out3 = 10ma 65 v rms 1. the AAT2782 is guaranteed to meet performance specifications over the C40c to +85c operating temperature range and is assu red by design, characterization and correla- tion with statistical process controls. downloaded from: http:///
6 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 typica l ch a r a ct e r ist ics step-down converters and ldo input current vs. input voltage (v en1 = v en2 = v en3 = v in ) input voltage (v) input current (a) 140 150 160 170 180 190 200 210 220 2.5 3.5 4 4.5 5 6 5.5 3 85c25c -40c step-down converter switching frequency vs. temperature (v in = 3.3v; i out1 = 1.2a; i out2 = 0.6a) temperature (c) switching frequency (mhz) 1.25 1.26 1.27 1.28 1.29 1.30 1.31 -40 40 100 80 60 20 0 -20 v out2 = 1.7v v out1 = 1.2v step-down converter switching frequency vs. input voltage (i out1 = 1.2a; i out2 = 0.6a) input voltage (v) frequency variation (%) -3 -2 -1 0 1 2 3 2.7 4.7 5.5 5.1 4.3 3.9 3.5 3.1 v out2 = 1.7v v out1 = 1.2v downloaded from: http:///
7 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 typica l ch a r a ct e r ist ics?bu ck con ve r t e r 1 step-down converter 1 efficiency vs. load (v out1 = 1.2v; v in = 2.7v to 5.5v; l = 1.7h) output current (ma) efficiency (%) 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 10000 v in = 2.7v v in = 3.3v v in = 3.6v v in = 4.2v v in = 5.0v v in = 5.5v step-down converter 1 dc regulation (v out1 = 1.2v; v in = 2.7 to 5.5v; l = 1.7h) output current (ma) output error (%) -0.5 -0.3 0.0 0.3 0.5 0.1 1 10 100 1000 10000 v in = 2.7v v in = 3.3v v in = 3.6v v in = 4.2v v in = 5.0v v in = 5.5v step-down converter 1 v ih and v il vs. input voltage (v en1 = v in ; v en2 = 0v; v en3 = 0v) input voltage (v) v ih and v il (v) 0.6 0.7 0.8 0.9 1.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v ih v il step-down converter 1 input current vs. input voltage (v en1 = v in ; v en2 = v en3 = 0v) input voltage (v) input current (a) 60 70 80 90 100 110 2.5 3 4.5 5 5.5 6 4 3.5 85c25c -40c step-down converter 1 line regulation (v out1 = 1.2v; i out1 = 0.1ma to 1a; l = 1.7h) input voltage (v) accuracy (%) -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 2.5 5.0 5.5 4.5 4.0 3.5 3.0 i out1 = 0.10ma i out1 = 10ma i out1 = 100ma i out1 = 1200ma step-down converter output 1 voltage error vs. temperature (v in = 3.3v; v out1 = 1.2v; i out1 = 1.2a) temperature (c) output voltage error (%) -1.00 -0.75 -0.50 -0.25 0.00 0.25 0.50 0.75 1.00 -50 -25 50 75 25 0 100 downloaded from: http:///
8 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 typica l ch a r a ct e r ist ics?bu ck con ve r t e r 1 step-down converter 1 output ripple (v in = 3.3v; v out1 = 1.2v; i out1 = 1.2a) time (500ns/div) output voltage (ac coupled) (top) (v) inductor current (bottom) (a) 1.18 1.20 1.22 0.8 1.0 1.2 1.4 step-down converter 1 output ripple (v in = 3.3v; v out1 = 1.2v; i out1 = 1ma) time (10s/div) output voltage (ac coupled) (top) (v) inductor current (bottom) (a) 1.18 1.20 1.22 0.0 0.2 step-down converter 1 line transient response (v in = 3v to 4v; v out1 = 1.2v; i out1 = 1.2a; c out = 10f) time (100s/div) input voltage (top) (v) output voltage (bottom) (v) 2 3 4 5 1.0 1.1 1.2 1.3 1.4 step-down converter 1 load transient response (i out1 = 0.9a to 1.2a; v in = 3.3v; v out1 = 1.2v; c out1 = 10f; c ff = 100pf) time (100s/div) output voltage (ac coupled) (bottom) (v) inductor current (top) (a) output current (middle) (a) 1.15 1.20 1.25 0.5 1.0 1.5 1.2a 0.9a 0.9a 1.2a step-down converter 1 soft start (v in = 3.3v; v out1 = 1.2v; i out1 = 1.2a; c ff = 100pf) time (50s/div) enable voltage (top) (v) output voltage (middle) (v) inductor current (bottom) (a) 0 1 2 3 4 0.0 0.5 1.0 downloaded from: http:///
9 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 typica l ch a r a ct e r ist ics?bu ck con ve r t e r 2 step-down converter 2 efficiency vs. load (v out2 = 1.7v; v in = 2.7v to 5.5v; l = 2.2h) output current (ma) efficiency (%) 10 20 30 40 50 60 70 80 90 100 0.1 1000 10000 100 10 1 v in = 2.7v v in = 3.3v v in = 3.6v v in = 4.2v v in = 5.0v v in = 5.5v step-down converter 2 dc regulation (v out2 = 1.7v; v in = 2.7v to 5.5v; l = 2.2h) output current (ma) output error (%) -0.5 -0.3 0.0 0.3 0.5 0.1 100 10000 1000 11 0 v in = 2.7v v in = 3.3v v in = 3.6v v in = 4.2v v in = 5.0v v in = 5.5v step-down converter 2 v ih and v il vs. input voltage (v en1 = 0v; v en2 = v in ; v en3 = 0v) input voltage (v) v ih and v il (v) 0.6 0.7 0.8 0.9 1.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v ih v il step-down converter 2 input current vs. input voltage (v en1 = 0v; v en2 = v in ; v en3 = 0v) input voltage (v) input current (a) 60 70 80 90 100 110 2.5 3 3.5 4 5 5.5 6 4.5 85c25c -40c step-down converter output 2 voltage error vs. temperature (v in = 3.3v; v out2 = 1.7v; i out2 = 600ma) temperature (c) output voltage error (%) -50 -25 0 25 50 75 100 -1.00 -0.75 -0.50 -0.25 0.00 0.25 0.50 0.75 1.00 step-down converter 2 line regulation (v out2 = 1.7v; i out2 = 0.1ma to 600ma; l = 2.2h) input voltage (v) accuracy (%) -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 2.5 3.0 3.5 4.0 4.5 5.5 5.0 i out2 = 0.10ma i out2 = 10ma i out2 = 100ma i out2 = 600ma downloaded from: http:///
10 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 typica l ch a r a ct e r ist ics?bu ck con ve r t e r 2 step-down converter 2 output ripple (v in = 3.3v; v out2 = 1.7v; i out2 = 600ma) time (500ns/div) output voltage (ac coupled) (top) (v) inductor current (bottom) (a) 1.69 1.70 1.71 0.4 0.6 0.8 step-down converter 2 output ripple (v in = 3.3v; v out2 = 1.7v; i out2 = 1ma) time (10s/div) output voltage (ac coupled) (top) (v) inductor current (bottom) (a) 1.69 1.70 1.71 0.0 0.2 step-down converter 2 line transient response (v in = 3v to 4v; v out2 = 1.7v; i out2 = 0.6a; c out2 = 10f) time (100s/div) input voltage (top) (v) output voltage (bottom) (a) 2 3 4 5 1.6 1.7 1.8 1.9 step-down converter 2 load transient response (i out2 = 0.45a to 0.6a; v in = 3.3v; v out2 = 1.7v; c out2 = 4.7f; c ff = 100pf) time (100s/div) output voltage (ac coupled) (bottom) (v) inductor current (top) (a) output current (middle) (a) 1.65 1.70 1.75 0.4 0.6 0.8 0.6a 0.45a 0.45a 0.6a step-down converter 2 soft start (v in = 3.3v; v out2 = 1.7v; i out2 = 600ma; c ff = 100pf) time (50s/div) enable voltage (top) (v) output voltage (middle) (v) inductor current (bottom) (a) 0 1 2 3 4 0.0 0.5 1.0 downloaded from: http:///
11 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 typica l ch a r a ct e r ist ics?ld o ldo line regulation (v in3 = v out2 = 1.7v; v out3 = 1.2v; vary v in ) input voltage (v) accuracy (%) -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 i out = 0.1ma to 400ma ldo v ih and v il vs. input voltage (v en1 = 0v; v en2 = v en3 = v in ) input voltage (v) v ih and v il (v) 0.6 0.7 0.8 0.9 1.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v ih v il ldo dropout characteristics (v in = 3.3v; vary v in3 from 3.3v to 1v; v out3 = 1.2v; i out3 = 0.1ma to 400ma; -40c) input voltage (v) ldo output voltage (v) 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3. 4 i out3 = 1ma i out3 = 10ma i out3 = 100ma i out3 = 50ma i out3 = 150ma i out3 = 300ma i out3 = 400ma ldo dropout characteristics (v in = 3.3v; v in3 = 3.3v to 1v; v out3 = 1.2v; i out3 = 0.1ma to 400ma; 85c) input voltage (v) ldo output voltage (v) 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 i out3 = 0.1ma i out3 = 10ma i out3 = 100ma i out3 = 50ma i out3 = 150ma i out3 = 300ma i out3 = 400ma ldo dropout characteristics (v in = 3.3v; v in3 = 3.3v to 1v; v out3 = 1.2v; i out3 = 0.1ma to 400ma; 25c) input voltage (v) ldo output voltage (v) 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 i out3 = 0.1ma i out3 = 10ma i out3 = 100ma i out3 = 50ma i out3 = 150ma i out3 = 300ma i out3 = 400ma ldo load transient response (200ma to 400a; v in = 3.3v; v in3 = v out2 = 1.7v) ldo output voltage (top) (v) ldo output current (bottom) (a) time (50s/div) 1.15 1.20 1.25 0.0 0.2 0.4 0.6 400ma 200ma downloaded from: http:///
12 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 typica l ch a r a ct e r ist ics?ld o ldo output voltage noise (i out3 = 10ma; power bw: 100~300khz) frequency (hz) noise (v) 0.0 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 100 1000 10000 100000 1000000 ldo power supply rejection ratio, psrr (i out3 = 10ma; bw: 100~300khz) frequency (hz) magnitude (db) 0 10 20 30 40 50 60 70 80 90 10 100 1000 10000 100000 v in3 = 3.3v v in3 = 1.7v downloaded from: http:///
13 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 fu n ct ion a l block d ia gr a m logic comp. erroramp control logic logic erroramp control logic osc ot comp. vp1 lx1 gnd1 vp2 lx2 gnd2 vin3 out3 agnd en3 fb1 en1 logic erroramp control logic voltage ref ocp fb2 en2 vin byp out3 voltage ref downloaded from: http:///
14 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 fu n ct ion a l d e scr ipt ion the AAT2782 is a 3-channel high performance power management ic. channel 1 is a 1200ma step-down con- verter. channel 2 is a 600ma step-down converter. channel 3 is a 400ma ldo regulator with low-input volt- age capability and low output noise for sensitive analog applications. the low input voltage capability of the ldo regulator allows the step-down converter to be tied directly to the ldo input. this configuration provides the efficiency benefits of a switching converter plus the low noise ben- efits of a ldo (low drop-out) regulator. ch a n n e l 1 a n d 2 : 1 2 0 0 / 6 0 0 m a st e p- d ow n ( bu ck ) con ve r t e r s the AAT2782 channel 1 and 2 step-down converters are peak current mode pwm converters operating at 1.3mhz frequency. the input voltage range is 2.7v to 5.5v. the output voltage range is 0.6v to v in and is adjustable with an external resistor divider. the converters provide internal compensation. power devices are sized for 1a output current while maintaining over 85% efficiency at full load. peak efficiency is above 95%. light load effi- ciency is maintained at greater than 80% down to 85% of full load current. channel 2 has excellent transient response and load and line regulation. transient response time is typically less than 20 s. the enable inputs, when pulled low, force the converter into a low power non-switching state consuming less than 1 a of current. for overload conditions, the peak input current is limit- ed. also, thermal protection completely disables switch- ing if internal dissipation becomes excessive, thus pro- tecting the device from damage. the junction over- temperature threshold is 130c with 20c of hysteresis. under-voltage lockout (uvlo) guarantees sufficient v in bias and proper operation of all internal circuits prior to activation. con t r ol loop the AAT2782 is a peak current mode step-down con- verter. the current through the p-channel mosfet (high side) is sensed for current loop control, as well as short- circuit and overload protection. a fixed slope compensa- tion signal is added to the sensed current to maintain stability for duty cycles greater than 50%. the peak cur- rent mode loop appears as a voltage-programmed cur- rent source in parallel with the output capacitor. the output of the voltage error amplifier programs the cur- rent mode loop for the necessary peak switch current to force a constant output voltage for all load and line con- ditions. internal loop compensation terminates the transconductance voltage error amplifier output. the reference voltage is internally set to program the con- verter output voltage greater than or equal to 0.6v. soft st a r t / en a ble soft start limits the current surge seen at the input and eliminates output voltage overshoot. when pulled low, the enable input forces the AAT2782 into a low-power, non-switching state. the total input current during shut- down is less than 1 a. low d r opou t ope r a t ion for conditions where the input voltage drops to the out- put voltage level, the converter duty cycle increases to 100%. as the converter approaches the 100% duty cycle, the minimum off-time initially forces the high side on-time to exceed the 1.3mhz clock cycle and reduces the effective switching frequency. once the input drops below the level where the converter can regulate the output, the high side p-channel mosfet is enabled con- tinuously for 100% duty cycle. at 100% duty cycle the output voltage tracks the input voltage minus the i*r drop of the high side p-channel mosfet. cu r r e n t lim it a n d ove r - te m pe r a t u r e pr ot e ct ion for overload conditions, the peak input current is limit- ed. to minimize power dissipation and stresses under current limit and short-circuit conditions, switching is terminated after entering current limit for a series of pulses. switching is terminated for seven consecutive clock cycles after a current limit has been sensed for a series of four consecutive clock cycles. thermal protec- tion completely disables switching when internal dissipa- tion becomes excessive. the junction over-temperature threshold is 130c with 20c of hysteresis. once an over-temperature or over-current fault conditions is removed, the output voltage automatically recovers. downloaded from: http:///
15 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 un de r - volt a ge lock ou t internal bias of all circuits is controlled via the vin input. under-voltage lockout (uvlo) guarantees sufficient v in bias and proper operation of all internal circuitry prior to activation. com pon e n t se le ct ion i n du ct or se le ct ion ?ch a n n e l 1 the step-down converter uses peak current mode con- trol with slope compensation to maintain stability for duty cycles greater than 50%. the output inductor value must be selected so the inductor current down slope meets the internal slope compensation requirements. the inductor should be set equal to the output voltage numeric value in h. this guarantees that there is suf- ficient internal slope compensation. manufacturers spec- ifications list both the inductor dc current rating, which is a thermal limitation, and the peak current rating, which is determined by the saturation characteristics. the inductor should not show any appreciable saturation under normal load conditions. some inductors may meet the peak and average current ratings yet result in exces- sive losses due to a high dcr. always consider the losses associated with the dcr and its effect on the total converter efficiency when selecting an inductor. for channel 1, the 1.5 h lqh32pn1r5nn0l series murata inductor has a 57m ? worst case dcr and a 1.75a dc current rating. at full 1.2a load, the inductor dc loss is 128mw which gives 9% loss in efficiency for a 1.2a, 1.2v output. i n du ct or se le ct ion ?ch a n n e l 2 the step-down converter uses peak current mode con- trol with slope compensation to maintain stability for duty cycles greater than 50%. the output inductor value must be selected so the inductor current down slope meets the internal slope compensation requirements. the internal slope compensation for the adjustable and low voltage fixed versions of the AAT2782 is 0.6a/ s. this equates to a slope compensation that is 75% of the inductor current down slope for a 1.8v output and 2.2 h inductor. 0.75 ? v o m = = = 0.6 l 0.75 ? 1.8v 2.2h a s 0.75 v o l = = 1.2 v o = 1.2 1.7v = 2.0h m 0.75 v o 0.6 s a s a a s in this case a standard 2.2 h value is selected. manufacturers specifications list both the inductor dc current rating, which is a thermal limitation, and the peak current rating, which is determined by the induc- tors saturation characteristics. the inductor should not show any appreciable saturation under all normal load conditions. some inductors may meet the peak and average current ratings yet result in excessive losses due to a high dcr. always consider the losses associated with the dcr and its effect on the total converter effi- ciency when selecting an inductor. for channel 2, the 2.2 h nlcv32t-2r2m series tdk inductor has a 130m worst case dcr and a 770ma dc current rating. at full 600ma load, the inductor dc loss is 47mw which gives less than 3% loss in efficiency for a 600ma, 3.3v output. i n pu t ca pa cit or select a 10 f to 22 f x7r or x5r ceramic capacitor for the vp1 and vp2 inputs. to estimate the required input capacitor size, determine the acceptable input ripple level (v pp ) and solve for c. the calculated value varies with input voltage and is a maximum when v in is double the output voltage. 1 - v o v in c in = v o v in - esr f osc v pp i o ?? 1 - = for v in = 2 v o ?? v o v in v o v in 14 c in(min) = 1 - esr 4 f osc v pp i o downloaded from: http:///
16 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 always examine the ceramic capacitor dc voltage coef- ficient characteristics when selecting the proper value. for example, the capacitance of a 10 f, 6.3v, x5r ceramic capacitor with 5.0v dc applied is actually about 6 f. the maximum input capacitor rms current is: ?? i rms = i o 1 - ?? v o v in v o v in the input capacitor rms ripple current varies with the input and output voltage and will always be less than or equal to half of the total dc load current. ?? 1 - = d (1 - d) = 0.5 2 = ?? v o v in v o v in 12 for v in = 2 v o i o rms(max) i 2 = the term ?? 1 - ?? v o v in v o v in appears in both the input voltage ripple and input capacitor rms current equations and is a maximum when v o is twice v in . this is why the input voltage ripple and the input capacitor rms current ripple are a maximum at 50% duty cycle. the input capacitor provides a low impedance loop for the edges of pulsed current drawn by the AAT2782. low esr/esl x7r and x5r ceramic capacitors are ideal for this function. to minimize stray inductance, the capacitor should be placed as closely as possible to the ic. this keeps the high frequency content of the input current localized, minimizing emi and input voltage ripple. the proper placement of the input capacitor (c1) can be seen in the evaluation board layout in the layout section of this datasheet (see figure 2). a laboratory test set-up typi- cally consists of two long wires running from the bench power supply to the evaluation board input voltage pins. the inductance of these wires, along with the low-esr ceramic input capacitor, can create a high q network that may affect converter performance. this problem often becomes apparent in the form of excessive ringing in the output voltage during load transients. errors in the loop phase and gain measurements can also result. since the inductance of a short pcb trace feeding the input voltage is significantly lower than the power leads from the bench power supply, most applications do not exhibit this problem. in applications where the input power source lead inductance cannot be reduced to a level that does not affect the converter performance, a high esr tanta- lum or aluminum electrolytic should be placed in parallel with the low esr/esl bypass ceramic capacitor. this dampens the high q network and stabilizes the system. ou t pu t ca pa cit or ?ch a n n e l 1 the output capacitor limits the output ripple and pro- vides holdup during large load transitions. a 10 f to 22 f x5r or x7r ceramic capacitor typically provides sufficient bulk capacitance to stabilize the output during large load transitions and has the esr and esl charac- teristics necessary for low output ripple. the output volt- age droop due to a load transient is dominated by the capacitance of the ceramic output capacitor. during a step increase in load current, the ceramic output capac- itor alone supplies the load current until the loop responds. within two or three switching cycles, the loop responds and the inductor current increases to match the load current demand. the relationship of the output voltage droop during the three switching cycles to the output capacitance can be estimated by: c out = 3 ? i load v droop f osc once the average inductor current increases to the dc load level, the output voltage recovers. the above equa- tion establishes a limit on the minimum value for the output capacitor with respect to load transients. the internal voltage loop compensation also limits the mini- mum output capacitor value to 10 f. this is due to its effect on the loop crossover frequency (bandwidth), phase margin, and gain margin. increased output capac- itance will reduce the crossover frequency with greater phase margin. ou t pu t ca pa cit or ?ch a n n e l 2 the output capacitor limits the output ripple and limits droop during large load transitions. a 4.7 f to 10 f x5r or x7r ceramic capacitor typically provides sufficient bulk capacitance to stabilize the output during large load transitions and has the esr and esl characteristics nec- essary for low output ripple. adj u st a ble ou t pu t re sist or se le ct ion the output voltages on the two AAT2782 buck convert- ers are programmed with external feedback resistors r3, r5 and r2, r4. to limit the bias current required for the external feedback resistor string while maintaining good noise immunity, the minimum suggested value for r2, r4 is 59k ? . although a larger value will further downloaded from: http:///
17 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 reduce quiescent current, it will also increase the imped- ance of the feedback node, making it more sensitive to external noise and interference. table 1 summarizes the resistor values for various output voltages with r2, r4 set to either 59k ?? for good noise immunity or 221k ?? for reduced no load input current. r3, r5r2, r4 v out = 0.6v 1 + v out ( v) r2 , r4 = 5 9 k r3 , r5 ( k ) r2 , r4 = 2 2 1 k r3 , r5 ( k ) 0.8 19.6 75 0.9 29.4 113 1.0 39.2 150 1.1 49.9 187 1.2 59.0 221 1.3 68.1 261 1.4 78.7 301 1.5 88.7 332 1.8 118 442 1.85 124 464 2.0 137 523 2.5 187 715 3.3 267 1000 ta ble 1 : aat2 7 8 2 re sist or va lu e s for va r iou s ou t pu t volt a ge s. ch a n n e l 3 : 4 0 0 m a low d r opou t ( ld o) con ve r t e r the channel 3 ldo converter can operate independently or can be used to post-regulate one of the step-down buck converters and provide a quiet output voltage. the input voltage can be as low as 1.7v for an output voltage of 1.2v; 2.5v, 2.8v, and 3.3v versions are also available. the output current is 400ma. if the channel 2 buck con- verter efficiency at full load is 85% and the ldo effi- ciency is 70%, the combined post-regulated efficiency would be ? 60%. if the ldo is used to post-regulate from a buck, then en3 should be brought high after the buck comes into regulation. com pon e n t se le ct ion i n pu t ca pa cit or typically, a 10 f or larger capacitor is required for c in in most applications and capacitance value of greater than or equal to the value of the output capacitor is recom- mended. a c in capacitor is required for basic ldo regula- tor operation. if the AAT2782 is physically located more than three centimeters from an input power source, a c in capacitor will be needed for stable operation. c in should be located as closely to the device vin3 pin as practically possible. c in values greater than 10 f will offer superior input line transient response and will assist in maximizing the highest possible power supply ripple rejection. ceramic, tantalum, or aluminum electrolytic capacitors may be selected for c in . there is no specific capacitor esr requirement for c in . however, for 400ma ldo regulator output operation, ceramic capacitors are recommended for c in due to their inherent capability over tantalum capacitors to withstand input current surges from low impedance sources such as batteries in portable devices. care should also be taken when choosing the voltage rat- ing for the capacitors. a 6.3v rated capacitor should not be used to bypass a 5v input. in such cases, a 10v rated capacitor should be used. ou t pu t ca pa cit or for proper load voltage regulation and operational stabil- ity, a capacitor is required between pins vout3 and gnd. the c out3 capacitor connection to the ldo regulator ground pin should be made as direct as practically possi- ble for maximum device performance. the AAT2782 has been specifically designed to function with very low esr ceramic capacitors. for best performance, ceramic capac- itors are recommended. typical output capacitor values for maximum output current conditions range from 4.7 f to 10 f. applications utilizing the exceptionally low output noise and optimum power supply ripple rejection charac- teristics of the AAT2782 should use 10 f or greater for c out3 . if desired, c out3 may be increased without limit. th e r m a l ca lcu la t ion s there are three types of losses associated with the AAT2782 step-down converters: switching losses, con- duction losses, and quiescent current losses. conduction losses are associated with the r ds(on) characteristics of the power output switching devices. switching losses are dominated by the gate charge of the power output switching devices. at full load, assuming continuous con- duction mode (ccm), a simplified form of the losses for each step-down is given by: p total(step-down) i o 2 (r ds(on)h v o + r ds(on)l [v in - v o ]) v in = + [(t sw f osc i out + i q ) v in ] downloaded from: http:///
18 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 i q is the step-down converter quiescent current. the term t sw is used to estimate the full load step-down con- verter switching losses. for the condition where the step-down converter is in dropout at 100% duty cycle, the total device dissipation reduces to: p total(step-down) = i o 2 r dson(h) + i q v in since r ds(on) , quiescent current, and switching losses all vary with input voltage, the total losses should be inves- tigated over the complete input voltage range. the AAT2782 ldo is designed to deliver a continuous output load current up to 400ma under normal operating conditions. the limiting characteristic for the maximum output load safe operating area is essentially package power dissipation and the internal preset thermal limit of the device. in order to obtain high operating currents, careful device layout and circuit operating conditions must be taken into account. this calculation accounts for the total power dissipation of the ldo regulator, including that caused by ground current. p total(ldo) = (v in3 - v out3 )i out3 + (v in3 - i q3 ) add the total losses of the two step-down converters and the ldo to determine the max junctions temperature. the maximum junction temperature can be derived from the ja for the tdfn34-16 which is 50c/w. t j(max) = p total ja + t amb la you t the suggested pcb layout for the AAT2782 is shown in figures 2 and 3. the following guidelines should be used to help ensure a proper layout. 1. the power input capacitors (c6) should be connected as closely as possible to vp1 and vp2, the ldo input capacitor (c3) should be close to vin3 as shown in figure 2. due to the pin placement of vp1, vp2 and vin3 for all converters, proper decoupling is not pos- sible with just one input capacitor. 2. c4 is a bypass capacitor for the vin supply pin for the device. 3. c8 and l1, c5 and l2 should be connected as close- ly as possible. the connection of l1 and l2 to the lx1 and lx2 pins should be as short as possible. 4. the feedback trace or fb pin should be separate from any power trace and connect as closely as pos- sible to the load point. sensing along a high-current load trace will degrade dc load regulation. 5. the resistance of the trace from the load returns to gnd1, gnd2, and agnd should be kept to a mini- mum. this will help to minimize any error in dc regulation due to differences in the potential of the internal signal ground and the power ground. 6. connect unused signal pins to ground to avoid unwanted noise coupling. 7. for good thermal coupling, pcb vias are required from the pad for the tdfn paddle to the ground plane. the via diameter should be 0.3mm to 0.33mm and positioned on a 1.2mm grid. downloaded from: http:///
19 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 aat2 7 8 2 sch e m a t ic p5 vcc p6 p2 v out2 v out1 v out3 1 3 2 4 en1 1 3 2 3 en2 1 3 2 2 en3 1.5h l1 2.2 h l2 vcc vcc vcc 59k r2 10f c6 vcc en1 en2 en3 10f c8 0.1 f c4 0.01f c7 10f c2 10f10v c3 0 r1 59k r4 r3 107k 1 p1 p4 gnd n.a. c1 n.a. c9 4.7f c5 r5 59k 1 3 2 1 vout1 vout2 vcc p3 gnd fb2 1 vp2 12 lx1 9 en1 7 byp 5 vin3 15 gnd2 13 out3 16 vp1 11 fb1 8 gnd1 10 en2 6 agnd 4 lx2 14 vin 3 en3 2 ep u1 AAT2782 1.2 v@1.2a 1.7v@0.6a 1.2v@0.4a sym bol pa r t n u m be r d e scr ipt ion qu a n t it y u1 AAT2782 skyworks AAT2782 two buck, one ldo 3x4 tdfn 1 l2 nlcv32t-2r2m tdk 2.2 h chip inductor, i sat = 770ma, 3.2x2.5x2.2mm 1 744028002 wurth 2.2 h inductor, i sat = 1a, 2.8x2.8x1.1mm lqm2hpn2r2mg0 murata 2.2 h inductor, i sat = 1.3a, 2.5x2.0x0.9mm l1 lqh32pn1r5nn0l murata 1.5 h inductor, i sat = 1.75a, 3.2x2.5x1.7mm 1 c2, c6, c8 generic, mlc, 0603, 10 f/6.3v cap 3 c3 generic, mlc, 0603, 10 f/10v cap 1 c5 generic, mlc, 0603, 4.7 f/6.3v cap 1 c9 generic, mlc, 0402, 56pf/50v 1 r2-r6 generic, 0402 resistors 6 downloaded from: http:///
20 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 figu r e 2 : aat2 7 8 2 eva lu a t ion boa r d com pon e n t side l a you t . figu r e 3 : aat2 7 8 2 eva lu a t ion boa r d solde r side la yo u t . downloaded from: http:///
21 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 or de r in g i n for m a t ion pa ck a ge volt a ge m a r k in g 1 pa r t n u m be r ( ta pe a n d re e l) 2 ch a n n e l 1 ch a n n e l 2 ch a n n e l 3 tdfn34-16 0.6 0.6 1.2 3zxyy aat2 7 8 2 i rn - aae- t1 skyworks green? products are compliant with all applicable legislation and are halogen-free. for additional information, refer to skyworks de?ition of green , document number sq04-0074. le ge n d volt a ge code adjustable (0.6) a 1.2 e pa ck a ge i n for m a t ion td fn 3 4 - 1 6 3.000 0.050 1.600 0.050 0.050 0.050 0.229 0.051 (4x) 0.850 max 4.000 0.050 3.300 0.050 index area detail "a" top view bottom view side view 0.350 0.100 0.230 0.050 0.450 0.050 detail "a" pin 1 indicator (optional) c0.3 all dimensions in millimeters. 1. xyy = assembly and date code. 2. sample stock is generally held on part numbers listed in bold . 3. the leadless package family, which includes qfn, tqfn, dfn, tdfn and stdfn, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing process. a solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder c onnection. downloaded from: http:///
22 AAT2782 triple-output pmic: dual buck with low-v in ldo data sheet skyworks solutions, inc. phone [781] 376-3000 fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com 202038a skyworks proprietary information products and product information are subject to change without notice. june 8, 2012 copyright ? 2012 skyworks solutions, inc. all rights reserved. information in this document is provided in connection with skyworks solutions, inc. (skyworks) products or services. these materials, including the information contained herein, are provided by sky works as a service to its customers and may be used for informational purposes only by the customer. skyworks assumes no responsibility fo r errors or omissions in these materials or the information contained herein. sky- works may change its documentation, products, services, speci ? cations or product descriptions at any time, without notice. skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for con ? icts, incompatibilities, or other dif ? culties arising from any future changes. no license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. skyworks assumes no liability for any materials, products or informatio n provided here- under, including the sale, distribution, reproduction or use of skyworks products, information or materials, except as may be provided in skyworks terms and conditions of sale. the materials, products and information are provided as is without warranty of any kind, whether express, implied, statutory, or otherwise, including fitness for a particular purpose or use, merchantability, performance, quality or non-infringement of any intellectual property right; all such warranti es are hereby expressly disclaimed. skyworks does not warrant the accuracy or completeness of the information, text, graphics or other items contained within these materials. skyworks shall not be liable for any damages, in- cluding but not limited to any special, indirect, incidental, statutory, or consequential damages, including without limitation, lost revenues or lost profits that may result from the use of the materials or information, whether or not the recipient of materials has been advised of the possibility of such damage. skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the skyworks products could lead to personal injury, death, physical or en- vironmental damage. skyworks customers using or selling skyworks products for use in such applications do so at their own risk and agree to fully indemnify skyworks for any damages resulting from such improper use or sale. customers are responsible for their products and applications using skyworks products, which may deviate from published speci ? cations as a result of design defects, errors, or operation of products outside of pub- lished parameters or design speci ? cations. customers should include design and operating safeguards to minimize these and other risks. skyworks assumes no liabi lity for applications assistance, customer product design, or damage to any equipment resulting from the use of skyworks products outside of stated published speci ? cations or parameters. skyworks, the skyworks symbol, and breakthrough simplicity are trademarks or registered trademarks of skyworks solutions, inc., in the united states and other countries. third-party brands and names are for identi ? cation purposes only, and are the property of their respective owners. additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. downloaded from: http:///

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