View ZXGD3101T8TA_4403748.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

___________________________________ max15038????0.6v v in 90%??4a??? ?2.9v5.5v??????? ?????? 1% max15038??pwm????? ?500khz2mhz?max15038 ??????? ?????????? ? ????nmos????? ????? J??????? ??? max15038??(28mhz)?? ???????iii? ?????20%?? ?????? ???? max15038????9?? ?????? 1% ???e0.1%??? ???k0.6v?? ?refin?????? ??max15038?? ???? ___________________________________ ? ? pol asic/cpu/dspi/o ddr? ?? ? raid?? ___________________________________ ? 31m ? r ds(on) ??24m ? r ds(on) ?mosfet ? ????4a ? ????? 1% ? 2.9v5.5v v in ? ? ?0.6v(0.9 x v in )?? ? ? ? 500khz2mhz?? ? ????? ? 9???? 0.6v0.7v0.8v1.0v1.2v1.5v1.8v 2.0v2.5v?? ? ??????? ? ??pwm??? ? ?? ? /?? ? ?? ? 24?4mm x 4mmqfn?? max15038 4a2mhz?? ? ________________________________________________________________ maxim integrated products 1 output 1.8v, 4a input 2.9v to 5.5v bst lx out in en v dd ctl2 ctl1 pgnd fb v dd comp pwrgd freq refin ss gnd mode max15038 ___________________________ ? _______________________________ ? 19-4320; rev 3; 12/10 part temp range pin-package max15038etg+ -40c to +85c 24 thin qfn-ep* + ??(pb)/rohs??? * ep = ?? ? ??????????????? ?????maxim?10800 852 1249 ()10800 152 1249 () maxim?china.maxim-ic.com ?
max15038 4a2mhz?? ? 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v in = v en = 5v, c vdd = 2.2f, t a = t j = -40c to +85c, typical values are at t a = +25c, circuit of figure 1, unless otherwise noted.) (note 3) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. in, pwrgd to gnd..................................................-0.3v to +6v v dd to gnd ..................-0.3v to the lower of +4v or (v in + 0.3v) comp, fb, mode, refin, ctl1, ctl2, ss, freq to gnd ..........................................-0.3v to (v dd + 0.3v) out, en to gnd ......................................................-0.3v to +6v bst to lx..................................................................-0.3v to +6v bst to gnd ............................................................-0.3v to +12v pgnd to gnd .......................................................-0.3v to +0.3v lx to pgnd ..................-0.3v to the lower of +6v or (v in + 0.3v) lx to pgnd ..........-1v to the lower of +6v or (v in + 1v) for 50ns i lx(rms) (note 1) ......................................................................4a v dd output short-circuit duration .............................continuous converter output short-circuit duration ....................continuous continuous power dissipation (t a = +70c) 24-pin tqfn (derate 27.8mw/c above +70c) ........2222mw thermal resistance (note 2) ja .................................................................................36c/w jc ..................................................................................6c/w operating temperature range ...........................-40c to +85c junction temperature ......................................................+150c storage temperature range .............................-65c to +150c lead temperature (soldering, 10s) .................................+300c soldering temperature (reflow) .......................................+260c note 1: lx has internal clamp diodes to pgnd and in. applications that forward bias these diodes should take care not to exceed the ics package power dissipation limits. note 2: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four- layer board. for detailed information on package thermal considerations, refer to china.maxim-ic.com/thermal-tutorial . parameter conditions min typ max units in in voltage range 2.9 5.5 v v in = 3.3v 4.7 8 in supply current f s = 1mhz, no load v in = 5v 5 8.5 ma v in = 5v, v en = 0v 10 20 total shutdown current from in v in = v dd = 3.3v, v en = 0v 45 a 3.3v ldo (v dd ) v dd rising 2.6 2.8 v dd falling 2.35 2.55 v v dd undervoltage lockout threshold lx starts/stops switching minimum glitch-width rejection 10 s v dd output voltage v in = 5v, i vdd = 0 to 10ma 3.1 3.3 3.5 v v dd dropout v in = 2.9v, i vdd = 10ma 0.08 v v dd current limit v in = 5v, v dd = 0v 25 40 ma bst bst supply current v bst = v in = 5v, v lx = 0 or 5v, v en = 0v 0.025 a pwm comparator pwm comparator propagation delay 10mv overdrive 20 ns pwm peak-to-peak ramp amplitude 1v pwm valley amplitude 0.8 v
max15038 4a2mhz?? ? _______________________________________________________________________________________ 3 electrical characteristics (continued) (v in = v en = 5v, c vdd = 2.2f, t a = t j = -40c to +85c, typical values are at t a = +25c, circuit of figure 1, unless otherwise noted.) (note 3) parameter conditions min typ max units error amplifier comp clamp voltage, high v in = 2.9v to 5v, v fb = 0.5v, v refin = 0.6v 2 v comp clamp voltage, low v in = 2.9v to 5v, v fb = 0.7v, v refin = 0.6v 0.7 v comp slew rate v fb step from 0.5v to 0.7v in 10ns 1.6 v/s comp shutdown resistance from comp to gnd, v in = 3.3v, v comp = 100mv, v en = v ss = 0v 6 ? internally preset output voltage accuracy v refin = v ss , mode = gnd -1 +1 % fb set point value ctl1 = ctl2 = gnd, mode = gnd 0.594 0.6 0.606 v fb to out resistor all vid settings except ctl1 = ctl2 = gnd 5.5 8 10.5 k ? open-loop voltage gain 115 db error-amplifier unity-gain bandwidth 28 mhz error-amplifier and refin common-mode input range v dd = 2.9v to 3.5v 0 v dd - 2 v v fb = 0.7v, sinking 1 error-amplifier maximum output current v comp = 1v, v refin = 0.6v v fb = 0.5v, sourcing -1 ma fb input bias current ctl1 = ctl2 = gnd -125 na ctl_ v ctl_ = 0v -7.2 ctl_ input bias current v ctl_ = v dd +7.2 a low, falling 0.8 open v dd /2 ctl_ input threshold high, rising v dd - 0.8 v hysteresis all vid transitions 50 mv refin refin input bias current v refin = 0.6v -185 na refin offset voltage v refin = 0.9v, fb shorted to comp -4.5 +4.5 mv lx (all pins combined) v in = v bst - v lx = 3.3v 42 lx on-resistance, high-side i lx = -2a v in = v bst - v lx = 5v 31 54 m ? v in = 3.3v 30 lx on-resistance, low-side i lx = 2a v in = 5v 24 42 m ? high-side sourcing 5.7 7 low-side sinking 7 lx current-limit threshold zero-crossing current threshold, mode = v dd 0.2 a v lx = 0v -0.01 lx leakage current v in = 5v, v en = 0v v lx = 5v +0.01 a
max15038 4a2mhz?? ? 4 _______________________________________________________________________________________ electrical characteristics (continued) (v in = v en = 5v, c vdd = 2.2f, t a = t j = -40c to +85c, typical values are at t a = +25c, circuit of figure 1, unless otherwise noted.) (note 3) parameter conditions min typ max units r freq = 49.9k? 0.9 1 1.1 lx switching frequency v in = 2.9v to 5v r freq = 23.6k? 1.8 2 2.2 mhz switching frequency range 500 2000 khz lx minimum off-time 78 ns lx maximum duty cycle r freq = 49.9k? 92 95 % lx minimum duty cycle r freq = 49.9k? 5 15 % average short-circuit in supply current out connected to gnd, v in = 5v 0.15 a rms lx output current 4a enable en input logic-low threshold en falling 0.9 v en input logic-high threshold en rising 1.5 v en input current v en = 0 or 5v, v in = 5v 0.01 a mode logic-low, falling 26 logic v dd /2 or open, rising 50 mode input-logic threshold logic-high, rising 74 %v dd mode input-logic hysteresis mode falling 5 %v dd mode = gnd -5 mode input bias current mode = v dd 5 a ss ss current v ss = 0.45v, v refin = 0.6v, sourcing 6.7 8 9.3 a thermal shutdown thermal-shutdown threshold rising 165 c thermal-shutdown hysteresis 25 c power-good (pwrgd) v fb falling, v refin = 0.6v 88 90 92 power-good threshold voltage v fb rising, v refin = 0.6v 92.5 % v refin power-good edge deglitch v fb rising or falling 48 clock cycles pwrgd output voltage low i pwrgd = 4ma 0.03 0.1 v pwrgd leakage current v in = v pwrgd = 5v, v fb = 0.7v, v refin = 0.6v 0.01 a hiccup overcurrent limit current-limit startup blanking 112 clock cycles autoretry restart time 896 clock cycles
max15038 4a2mhz?? ? _______________________________________________________________________________________ 5 efficiency vs. output current max15038 toc01 output current (a) efficiency (%) 1.0 50 60 70 80 90 100 40 0.1 10.0 v out = 2.5v v out = 1.8v v out = 1.2v pwm skip efficiency vs. output current max15038 toc02 output current (a) efficiency (%) 1.0 50 60 70 80 90 100 40 0.1 10.0 v out = 2.5v v out = 1.8v v out = 1.2v v in = 3.3v pwm skip frequency vs. input voltage max15038 toc03 input voltage (v) frequency (mhz) 5.0 4.5 3.0 3.5 4.0 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 1.80 2.5 5.5 t a = +85c t a = +25c t a = -40c r freq = 23.2k? frequency vs. input voltage max15038 toc04 input voltage (v) frequency (mhz) 5.0 4.5 3.0 3.5 4.0 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 0.80 2.5 5.5 t a = +85c t a = +25c t a = -40c r freq = 49.9k? load regulation max15038 toc05a load current (a) output-voltage change (%) 3 2 1 -0.45 -0.40 -0.35 -0.30 -0.25 -0.20 -0.15 -0.10 -0.05 0 -0.50 04 v out = 1.2v v out = 1.8v v out = 2.5v line regulation (load = 4a) max15038 toc05b input voltage (v) output-voltage change (%) 5.0 4.5 4.0 3.5 3.0 -0.10 -0.08 -0.06 -0.04 -0.02 0 -0.12 2.5 5.5 v out = 1.2v v out = 1.8v v out = 2.5v _________________________________________________________________________ ? (typical values are v in = v en = 5v, v out = 1.8v, r freq = 49.9k? , i out = 4a, t a = +25c, circuit of figure 1, unless otherwise noted.) electrical characteristics (continued) (v in = v en = 5v, c vdd = 2.2f, t a = t j = -40c to +85c, typical values are at t a = +25c, circuit of figure 1, unless otherwise noted.) (note 3) parameter conditions min typ max units fb hiccup threshold v fb falling 70 % v refin hiccup threshold blanking time v fb falling 28 s note 3: specifications are 100% production tested at t a = +25c. limits over the operating temperature range are guaranteed by design.
max15038 4a2mhz?? ? 6 _______________________________________________________________________________________ _______________________________________________________________ _____ ?() (typical values are v in = v en = 5v, v out = 1.8v, r freq = 49.9k? , i out = 4a, t a = +25c, circuit of figure 1, unless otherwise noted.) load transient max15038 toc06 40s/div v out ac-coupled 100mv/div 2a i out 0a switching waveforms (forced pwm, 2a load) max15038 toc07 400ns/div ac-coupled 50mv/div v out i lx v lx 2a/div 0a 5v/div switching waveforms (skip mode, no load) max15038 toc08 2s/div ac-coupled 100mv/div v out i lx v lx 1a/div 0a 0v 5v/div soft-start waveform (r load = 0.5?) max15038 toc09 400s/div v en 5v/div 0v v out 1v/div shutdown waveform (r load = 0.5?) max15038 toc10 10s/div v en 5v/div 0v v out 1v/div input shutdown current vs. input voltage max15038 toc11 input voltage (v) input shutdown current (a) 5.0 4.5 4.0 3.5 3.0 6 7 8 9 10 11 12 5 2.5 5.5 v en = 0v maximum output current vs. output voltage max15038 toc12 output voltage (v) maximum output current (a) 2.0 1.5 1.0 3 4 5 6 7 8 9 10 2 0.5 2.5
max15038 4a2mhz?? ? _______________________________________________________________________________________ 7 ________________________________________________________________________ ?() (typical values are v in = v en = 5v, v out = 1.8v, r freq = 49.9k? , i out = 4a, t a = +25c, circuit of figure 1, unless otherwise noted.) hiccup current limit max15038 toc13 400s/div 1v/div 5a/div 1a/div 0v 0a 0a v out i out i in rms input current during short circuit vs. input voltage max15038 toc14 input voltage (v) rms input current (a) 5.0 4.5 4.0 3.5 3.0 0.1 0.2 0.3 0.4 0.5 0 2.5 5.5 v out = 0v exposed pad temperature vs. ambient temperature max15038 toc15 ambient temperature (c) exposed pad temperature (c) 80 60 40 20 10 20 30 40 50 60 70 80 90 100 0 0 100 measured on a max15038evkit 4a load feedback voltage vs. temperature max15038 toc16 temperature (c) feedback voltage (v) 60 35 -15 10 0.57 0.58 0.59 0.60 0.62 0.61 0.63 0.64 0.56 -40 85 soft-start with refin max15038 toc17 200s/div 1a/div 0.5v/div 2v/div 0a 1v/div 0v 0v 0v i in v pwrgd v refin v out starting into prebiased output (mode = v dd , v out = 2.5v, 2a load) max15038 toc18 200s/div 5v/div 1v/div 5v/div 0v 2a 0a 0v 0v v en v pwrgd v out i out starting into prebiased output (mode = v dd /2, v out = 2.5v, 2a load) max15038 toc19 200s/div 5v/div 1v/div 5v/div 0v 2a 0a 0v 0v v en v pwrgd v out i out
max15038 4a2mhz?? ? 8 _______________________________________________________________________________________ _______________________________________________________________ _____ ?() (typical values are v in = v en = 5v, v out = 1.8v, r freq = 49.9k? , i out = 4a, t a = +25c, circuit of figure 1, unless otherwise noted.) starting into prebiased output (mode = v dd , v out = 2.5v, no load) max15038 toc20 200s/div v en 2v/div v out 1v/div v pwrgd 2v/div 0v 0v 0v starting into prebiased output (mode = v dd /2, v out = 2.5v, no load) max15038 toc21 200s/div v en 2v/div v out 1v/div v pwrgd 2v/div 0v 0v 0v starting into prebiased output above nominal setpoint (v out = 1.5v) max15038 toc22 1ms/div v en 2v/div v out 1v/div v pwrgd 2v/div 0v 0v 0v v mode = v dd , no load starting into prebiased output above nominal setpoint (v out = 1.5v) max15038 toc23 1ms/div v en 2v/div v out 1v/div v pwrgd 2v/div 0v 0v 0v v mode = v dd /2, no load transition from skip mode to forced pwm mode max15038 toc24 2ms/div v mode 5v/div v lx 5v/div v out 0.5v/div 0v transition from forced pwm mode to skip mode max15038 toc25 4ms/div v mode 5v/div v lx 5v/div v out 0.5v/div 0v
max15038 4a2mhz?? ? ____________________________________________________________________________ ? 1 mode 2v dd 3 ctl1 4 ctl2 5 refin 6 ss 7 gnd 8 comp 9 fb 10 out 11 freq 12 pwrgd 13 bst 14, 15, 16 lx 17C20 pgnd 21, 22, 23 in 24 en ep ????? ??? ? 3.3v ldo???????v dd gnd??2.2 f?esr??? ????ctl1ctl2?9???????1 ? (ctl1ctl2) ? ???refinss???0.6v?refin???fb?refin ?ic??/???refin?gnd ?ssgnd????????1nf? ?? refin ? ??????gndpgnd ??compfbout????ic??/???comp? gnd ?fbgnd???????0.6v(90% x v in ) ?ctl1ctl2?9?????fb?rc ??????out? ??freqgnd??k????? ??(freq) ? ??v fb v refin 92.5% (?)v refin 0.54v?pwrgd? ?v fb v refin 90% (?)v refin 0.54v?pwrgd???ic?? ??v dd ?uvlo?ic?????pwrgd?? ?mosfet???pmos?in?0.1 fbstlx ?lx???lx???ic????? lx?? ???pgnd????ic?pgnd? ????2.9v5.5v?22 f???inpgnd ????/?max15038 ??eppgnd????????ep???? _______________________________________________________________________________________ 9
max15038 4a2mhz?? ? 10 ______________________________________________________________________________________ _______________________________________________________________ _____________ ? control logic in lx pgnd mode in bst thermal shutdown soft-start voltage reference bias generator oscillator 1v p-p shutdown control uvlo circuitry 3.3v ldo v dd shdn fb 0.9 x v refin ss fb comp gnd pwrgd freq error amplifier pwm comparator current-limit comparator current-limit comparator bst switch comp clamps en refin vid voltage- control circuitry out ctl2 ctl1 8k? max15038
max15038 4a2mhz?? ? ______________________________________________________________________________________ 11 c10 0.1f c6 22f output 1.8v, 4a input 2.9v to 5.5v c7 0.1f c5 2.2f bst lx out in v dd ctl2 ctl1 pgnd fb c1 33pf c2 1500pf v dd r1 20k? r2 2.67k? comp l1 0.47h c3 560pf c4 0.022f r4 49.9k? c8 22f c9 0.01f r3 158? pwrgd en freq refin ss gnd mode max15038 2.2? c15 1000pf optional ?1. 1mhzv in = 2.9v5.5v?v out = 1.8v???? _______________________________ ?? max15038??????4a max150382.9v5.5v? ??0.6v0.9 x v in ???? ??????? ? 1% max15038???????? ????(?1)?? ???max15038(4mm x 4mm) ?24?qfn?refin?max15038 ddr????r ds(on) (?n mosfet 24m ? ?nmosfet 31m ? )n mosfet?????? max15038??????(28mhz) ???????2mhz??? ???iii? ?????????? ????? ?v fb ?v refin 92.5%v refin 0.54v??(pwrgd)???? max150383????????pwm?? ??pwm?????? ?? _______________________________________________________________ _______ ??
????? ????mosfet????? ???? pwm?????mosfet ?????????? ???? ??pwm????? pwm????????? ??v comp ????? ???????? ??mosfet7a (?)?? lx???mosfet???? ???????? ??????? ????max15038 ????? ??v fb v refin x 70%????? ?12 s?max15038???mosfet ?????comprefin?? refinss???? ???896??112? ???? ????? refin max15038??? ?8 a (?)?ss? ??ssgnd?? ????? t ss ?????max15038 ??(refin)ic?fb?? refin???????2 ???????refin ss??0.6v?ss???1nf ??(uvlo) v dd 2.55v (?)?uvlo? ??v dd 2.6v (?)?uvlo ???50mv?? ? bst ??n?????? ?mosfet??bst?lx? v in ??mosfet?? ????lx?????mosfet ??? ??(freq) ???500khz2mhz? ?freqgnd??(r freq ) ic???r freq ?? f s ??????? r k sf s freq s = ? 50 0 95 1 0 05 ? . ( .) c at v ss = 8 06 . c r2 r1 refin max15038 ?2. ?????? max15038 4a2mhz?? ? 12 ______________________________________________________________________________________
max15038 ?(pwrgd) pwrgd??v fb 0.925 x v refin v refin 0.54v?48????v fb v refin x 90%v refin 0.54v?48? ?pwrgd??ic ????v dd ?uvlo?ic ????? pwrgd ? ?(ctl1ctl2) 1??ctl1ctl2??? ??ctl1ctl2????v dd gndctl1ctl2gnd?v out fb??8.06k ? ctl1ctl2??? ????????? ?ctl1ctl2??? ????en??? ??v out fbgnd???? 0.6vv in x 90%???3a ?ctl1ctl2gnd ??? engnd??ic??10 a (?)????lx??en? ??max15038 ? ????3t j = +165 c???????? ???20 c???? 2??? ????? _______________________________ ?? inv dd ? ??????max15038 ??inpgnd??22 f?? in???v dd gnd??2.2 f esr???v dd ??? ic ? ??? lir????? ????????lir ?20% 40% ????g?? ??????? ????max15038? 2? ? ??????esresl?? ???dc-dc??? ??????? ??esr???esl?? ??esresl?? vv v v ripple ripple c ripple esr ripple esl =+ + ()()() ) l v vv f v lir i out in out s in out max = ? () () 1. ctl1ctl2?? 4a2mhz?? ? ______________________________________________________________________________________ 13 ctl1 ctl2 v out (v) v out when using external v refin (v) gnd gnd 0.6* or 0.6 < v out 0.9 x v in ** v refin * or v refin < v out 0.9 x v in ** v dd v dd 0.7 v refin x (7/6) gnd unconnected 0.8 v refin x (4/3) gnd v dd 1.0 v refin x (5/3) unconnected gnd 1.2 v refin x 2 unconnected unconnected 1.5 v refin x 2.5 unconnected v dd 1.8 v refin x 3 v dd gnd 2.0 v refin x (10/3) v dd unconnected 2.5 v refin x (25/6) * r3?8.06k ? kr4?? ** r3r4? (?3a)??? ?
max15038 4a2mhz?? ? 14 ______________________________________________________________________________________ ?esresl??? ? ?(i p-p ) ????????? ????? ???????? ???y???? ???????y ?esresl???esl ???? ???????? ?????esr x ?i load ? ???????? ?????? ??????????? ??????? ?? ? ? ????? ic??? ???????? ????? v in-ripple ??? ??2%d???(v out /v in ) t s ?(1/f s ) ????? ????? ????rms ?? i ripple ?rms? ???? ?l?c o ?? esr???? r l ?dcr (?)?? r ds(on) ??r ds(on) ???24m ? (?mosfet) 31m ? (?mosfet)r o ??k? ????esr??? ?????? ?esr??esr?? max15038????? ?esr??????? ?f c ???? ???40db/???? 180 ?????? f x esr x c z esr o _ = 1 2 ff x lxc x r esr rr p lc p lc o o ol 12 1 2 __ == + + ? ? ? ? ? ? ii v vv v ripple load out in out in = ? () c dxt xi v in min s out in ripple _ = ? i vv fl x v v pp in out s out in ? = ? v i t x esl ripple esl pp off () = ? v i t x esl ripple esl pp on () = ? v i x esr ripple esr p p () = ? v i xc xf ripple c pp out s () = ? 8
max15038 ????????3?4 ?iii?iii?? ?f p1_ea ?(?)iii? ? ?c1 >> c2r3 >> r2?k? ???? ?esr???? ???max15038? ?max15038?????r3 ?ic?kr4(?3b) ?max15038??(?3a)? ? ? ??v refin v out > v refin 0.6v?v out =v refin ?fbv out ? ?8.06k ? ???f c ??? f s 10%20%????????? ????f c ?c1?? v p-p ???(?1v) lc???iii? ??lc?????? ?lc???80% ?? ?f p2_ea ?f z_esr ?? c xr x l x c x r esr rr oo lo 3 1 08 3 = + + . () r xc x l x c x r esr rr oo lo 1 1 08 1 = + + . () c v v fr r r in pp c l o 1 1 5625 2 31 = + ? . () r v refin 4 = ( r vv refin out 3) - r r v out 4 06 3 06 = . . - _ 1 2 23 2 = f rc p ea f p ea 3_ = 1 2 12 rc f rc z ea 2 1 2 33 _ = f rc z ea 1 1 2 11 _ = 4a2mhz?? ? ______________________________________________________________________________________ 15 max15038 l c out external resistive divider internal preset voltages v out r3 r4 r1 comp fb out ctl1 ctl2 lx c1 c3 r2 c3 r2 c2 max15038 l a) b) c out v out r3 8k? r1 comp out fb ctl1 voltage select ctl2 lx c1 c2 ?3. iii?
???1/2? c2 ???????? ????????? ????? r1???????? 200khz?iii???? ??r3???2k ? 10k ? ? ???r4?? ? _______________________________ ??? max15038????(mode)??? ???(2) ?pwm?? modegnd??pwm??? pwm??max15038????(? freq??)^en?? ?????pwm????? ????????? ??????0.875a( ?)?????? ?????????? ???????? 0.58a????? ??pwm????4 dac128???7a?? ??????? ????pwm???? ????() mode???v dd /2?max15038 ?????? ???? ? starting into prebiased output ????????????? ????fb??ss?? pwm??pwm???pwm? ???????? max15038??????? ????128?? 4dac???????fb? v refin x 92.5%?????4096? ???pwm???refin? ???????? ???pwm?? refin??????? ??2ms c rf s 2 1 1 = r c x esr c o 2 3 = double pole gain (db) second pole first and second zeros power-stage transfer function compensation transfer function open-loop gain third pole ?4. iii?? max15038 4a2mhz?? ? 16 ______________________________________________________________________________________ mode connection operation mode gnd forced pwm unconnected or v dd /2 forced pwm. soft-startup into a prebiased output (monotonic startup). v dd skip mode. soft-startup into a prebiased output (monotonic startup). 2. ???
max15038 ?? modev dd ???? ?max15038?b?(? ?)????? ??pwm??(?freq??) ????? ???????(8?) ??????????? ??????? ???0.2a (?)? ?????? ???/? ??????????0.58a ?3???? ??? ?????? ????fb?v refin x 92.5% ???4096???? ?? ????????pwm?? ???????? pwm????????? ????/3^ pcb?? ?pcb?????????? ?max15038??? ?pcb?? 1) ?? ??? 2) v dd inss?????ic? ??????(pgnd) ??(gnd)? 3) ??????? ?lx? ? 4) inlxpgnd????? ic???????? 5) ??????? ?ic 6) ???(lx)??? (fbcomp) 4a2mhz?? ? ______________________________________________________________________________________ 17
max15038 4a2mhz?? ? _______________________________ ?? process: bicmos thin qfn max15038 19 20 21 22 12 3456 18 17 16 15 14 13 23 24 12 11 10 9 8 7 pgnd in pgnd ep in en mode v dd ctl1 ctl2 refin ss pgnd pgnd lx lx bst in pwrgd out freq fb gnd comp lx top view + _______________________________ 18 ______________________________________________________________________________________ _______________________________ ?? ??????? china.maxim-ic. com/packages ????+ # -? rohs??????????? ??rohs???? ? ? ?? 24 tqfn-ep t2444+4 21-0139 90-0022
max15038 4a2mhz?? ? maximmaxim????????maxim??????????? maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ______________________ 19 ? 2010 maxim integrated products maxim maxim integrated products, inc. ??? 0 10/08 ? 1 12/09 5 2 5/10 3, 13, 15 3 12/10 15 ____________________________________________________________________________ ?? ? ? ? ?? ? maxim 8328 100083 ?800 810 0310 010-6211 5199 010-6211 5299 electrical characteristics ?1? ? ?c1?(2.5?1.5625)

▲Up To Search▲

Price & Availability of ZXGD3101T8TA

	To Download ZXGD3101T8TA Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .