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___________________________________ MAX17000(pwm)??? ddrddr2ddr3??? ????/?ldo? ????vddqvttvttr ? vddq?????maxim?quick- pwm tm ???pwm ???/?(?????)? 100ns????????? quick-pwm???????pwm ???????????? ???pwm???? ???????? ?????MAX17000? ????skip???pwm?? ????????? ??200khz600khz??? ???vddq???1.8v1.5v ???1.0v2.5v?? ????1%?? MAX17000? 2a?/ldo?? ?vtt?vtt??? ? 5mv????????? ???? vttr?? 3ma? ????? MAX1700024?4mm x 4mmtqfn? ___________________________________ ? ?? ddrddr2ddr3? sstl ___________________________________ ? smps?(vddq) quick-pwm100ns??? ???1.8v1.5v 1.0v2.5v? ?????1%v out ???26v ???? 200khz600khz? ? ?/??(vtt) 2a?/? ?? ???vddq/2?refin 0.5v1.5v? ? ????? ? /? ? smps??? ? vtt??? ? ?? ? ??/? ? 3ma?(vttr) MAX17000 ?ddr2ddr3 ?? ________________________________________________________________ maxim integrated products 1 23 24 22 21 8 7 9 pgood1 vtts vttr 10 ovp bst dh ton dl csh 1 2 skip 456 1718 16 14 13 v cc shdn refin vtti vtt pgnd2 MAX17000etg+ pgood2 lx 3 15 agnd 20 11 fb pgnd1 19 12 csl v dd tqfn 4mm x 4mm top view stdby _______________________________ _______________________________ ? 19-4125; rev 1; 2/11 ??????????????? ?????maxim?10800 852 1249 ()10800 152 1249 () maxim?china.maxim-ic.com ? + ??(pb)/rohs??? * ep = ?? quick-pwmmaxim integrated products, inc.?? part temp range pin-package MAX17000etg+ -40 c to +85 c 24 tqfn-ep*
MAX17000 ?ddr2ddr3 ?? 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v in = 12v, v cc = v dd = v shdn = v refin = 5v, v csl = 1.8v, stdby = skip = agnd, t a = 0? to +85?, unless otherwise noted. typical values are at t a = +25c.) (note 1) 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. ton to pgnd1 .......................................................-0.3v to +28v v dd to pgnd1..........................................................-0.3v to +6v v cc to v dd ............................................................-0.3v to +0.3v ovp to agnd ...........................................................-0.3v to +6v shdn, stdby, skip to agnd .................................-0.3v to +6v refin, fb, pgood1, pgood2 to agnd ................................-0.3v to (v cc + 0.3v) csh, csl to agnd ....................................-0.3v to (v cc + 0.3v) dl to pgnd1..............................................-0.3v to (v dd + 0.3v) bst to pgnd1...........................................................-1v to +34v bst to lx..................................................................-0.3v to +6v dh to lx ....................................................-0.3v to (v bst + 0.3v) bst to v dd .............................................................-0.3v to +26v vtti to pgnd2 .........................................................-0.3v to +6v vtt to pgnd2 ............................................-0.3v to (v tti + 0.3v) vtts to agnd............................................-0.3v to (v cc + 0.3v) vttr to agnd ..........................................-0.3v to (v csl + 0.3v) pgnd1, pgnd2 to agnd.....................................-0.3v to +0.3v continuous power dissipation (t a = +70c) 24-pin, 4mm x 4mm tqfn-ep (derated 27.8mw/c above +70c) ..........................2222mw operating temperature range ...........................-40c to +85c junction temperature ......................................................+150c storage temperature range .............................-65c to +150c lead temperature (soldering, 10s) .................................+300c parameter symbol conditions min typ max units pwm controller v in 3 26 input voltage range v cc , v dd 4.5 5.5 v fb = agnd 1.485 1.500 1.515 fb = v cc 1.782 1.800 1.818 output voltage accuracy v csl v in = 4.5v to 26v, skip = v cc fb = adj 0.99 1.000 1.01 v output voltage range v csl 1 2.7 v load regulation error v csh - v csl = 0 to 18mv, skip = v cc 0.1 % line regulation error v dd = 4.5v to 5.5v, v in = 4.5v to 26v 0.25 % soft-start ramp time t sstart rising edge of shdn 1.4 2.1 ms soft-stop ramp time t sstop falling edge of shdn 2.8 ms soft-stop threshold 25 mv r ton = 96.75k (600khz), 167ns nominal -15 +15 r ton = 200k (300khz), 333ns nominal -10 +10 on-time accuracy (note 2) t on v in = 12v, v csl = 1.2v r ton = 303.25k (200khz), 500ns nominal -15 +15 %
MAX17000 ?ddr2ddr3 ?? _______________________________________________________________________________________ 3 electrical characteristics (continued) (v in = 12v, v cc = v dd = v shdn = v refin = 5v, v csl = 1.8v, stdby = skip = agnd, t a = 0? to +85?, unless otherwise noted. typical values are at t a = +25c.) (note 1) parameter symbol conditions min typ max units minimum off-time t off(min) (note 2) 250 350 ns quiescent supply current (v dd ) i dd fb forced above 1.0v, stdby = agnd or v cc, t a = +25c 0.01 1.00 a fb forced above 1.0v (smps, vtt, and vttr blocks); stdby = v cc 2 4 ma quiescent supply current (v cc ) i cc fb forced above 1.0v (ultra-skip and vttr blocks); stdby = agnd 275 475 a shutdown supply current (v dd + v cc ) i cc + i dd shdn = agnd, t a = +25c 0.01 5 a ton pin shutdown current i ton shdn = agnd, v in = 26v, v dd = 0 or 5v, t a = +25c 0.01 1.00 a linear regulator (vtt) vtti input voltage range v tti 1.0 2.8 v vtti supply current i vtti v vtti = 2.5v, v refin = 1.4v 10 50 a vtti shutdown current shdn = agnd, t a = +25c 10 a refin input bias current v vtti = 2.5v, v refin = 1.4v -50 +50 na refin range v refin 0.5 1.5 v refin disable threshold v cc - 0.3 v high-side on-resistance (source, i vtt = 0.1a) 0.12 0.25 vtt internal mosfet low-side on-resistance (sink, i vtt = 0.1a) 0.18 0.36 v refin = 1v, i vtt = +50a -5 +5 vtt output-accuracy source load (v refin - 5mv) or (v csl /2 - 5mv) to vtts, vtt = vtts v refin = 0.5v to 1.5v, i vtt = +300ma -5 mv v refin = 1v, i vtt = -50a -5 +5 vtt output-accuracy sink load (v refin + 5mv) or (v csl /2 + 5mv) to vtts, vtt = vtts v refin = 0.5v to 1.5v, i vtt = -300ma +5 mv vtt load regulation -50a to -1a i vtt +50a to +1a 13 17 mv/a vtt line regulation 1.0v v tti 2.8v, i vtt = 100ma 1 mv source 2 4 vtt current limit sink -4 -2 a vtt current-limit soft-start time with respect to internal vtt_en signal 160 s vtt discharge mosfet ovp = v cc 16 vtts input current t a = +25c 0.1 1.0 a
MAX17000 ?ddr2ddr3 ?? 4 _______________________________________________________________________________________ electrical characteristics (continued) (v in = 12v, v cc = v dd = v shdn = v refin = 5v, v csl = 1.8v, stdby = skip = agnd, t a = 0? to +85?, unless otherwise noted. typical values are at t a = +25c.) (note 1) parameter symbol conditions min typ max units reference buffer (vttr) i vtt = 1ma -10 +10 vttr output accuracy (adj) refin to vttr i vtt = 3ma -20 +20 i vtt = 1ma -10 +10 vttr output accuracy (preset) v csl /2 to vttr i vtt = 3ma -20 +20 mv vttr maximum recommended current source/sink 5 ma fault detection (smps) smps ovp and pgood1 upper trip threshold 12 15 18 % smps ovp and pgood1 upper trip threshold fault-propagation delay t ovp fb forced 25mv above trip threshold 10 s smps output undervoltage fault-propagation delay t uvp 200 s smps pgood1 lower trip threshold measured at fb, hysteresis = 25mv -12 -15 -18 % pgood1 lower trip threshold propagation dela y t pgood1 fb forced 50mv below pgood1 trip threshold 10 s pgood1 output low voltage i sink = 3ma 0.4 v pgood1 leakage current i pgood1 fb = 1v (pgood1 high impedance), pgood1 forced to 5v, t a = +25c 1 a ton por threshold v por(in) rising edge, pwm disabled below this level; hysteresis = 200mv 3.0 v fault detection (vtt) pgood2 upper trip threshold hysteresis = 25mv 8 10 13 % pgood2 lower trip threshold hysteresis = 25mv -13 -10 -8 % pgood2 propagation delay t pgood2 vtts forced 50mv beyond pgood2 trip threshold 10 s pgood2 fault latch delay vtts forced 50mv beyond pgood2 trip threshold 5 ms pgood2 output low voltage i sink = 3ma 0.4 v pgood2 leakage current i pgood2 vtts = v refin (pgood2 high impedance), pgood2 forced to 5v, t a = +25c 1 a fault detection thermal-shutdown threshold t shdn hysteresis = 15 c 160 c v cc undervoltage lockout threshold v uvlo(vcc) rising edge, ic disabled below this level hysteresis = 200mv 3.8 4.1 4.4 v csl discharge mosfet ovp = v cc 16
MAX17000 ?ddr2ddr3 ?? _______________________________________________________________________________________ 5 electrical characteristics (continued) (v in = 12v, v cc = v dd = v shdn = v refin = 5v, v csl = 1.8v, stdby = skip = agnd, t a = 0? to +85?, unless otherwise noted. typical values are at t a = +25c.) (note 1) parameter symbol conditions min typ max units current limit valley current-limit threshold v limit v csh - v csl 17 20 25 mv current-limit threshold (negative) v neg v csh - v csl , skip = v cc -23 mv current-limit threshold (zero crossing) v zx v csh - v csl 1 mv smps gate drivers dh gate driver on-resistance r dh bst - lx forced to 5v 1.5 5.0 dl high 1.5 5.0 dl gate driver on-resistance r dl dl low 0.6 3.0 dh gate driver source/ sink current i dh dh forced to 2.5v, bst - lx forced to 5v 1 a i dl(src) dl forced to 2.5v 1 dl gate driver source/ sink current i dl(snk) dl forced to 2.5v 3 a dl rising, t a = +25c 10 25 dead time t dead dl falling, t a = +25c 15 35 ns internal bst switch on-resistance r bst i bst = 10ma, v dd = 5v internal design target 4.5 lx, bst leakage current v bst = v lx = 26v, shdn = agnd, t a = +25c 0.001 20 a inputs and outputs logic input threshold shdn , stdby , skip , ovp, rising edge hysteresis = 300mv/600mv (min/max) 1.30 1.65 2.00 v logic input current skip = agnd or v cc , -1 +1 a input leakage current v csh = 0v or v cc , t a = +25c -1 +1 a input bias current v csl = 0v or v cc 55 100 a
MAX17000 ?ddr2ddr3 ?? 6 _______________________________________________________________________________________ electrical characteristics (v in = 12v, v cc = v dd = v shdn = v refin = 5v, v csl = 1.8v, stdby = skip = agnd, t a = -40? to +85?, unless otherwise noted.) (note 1) parameter symbol conditions min max units pwm controller v in 3 26 input voltage range v cc , v dd 4.5 5.5 v fb = agnd 1.485 1.520 fb = v cc 1.782 1.820 output voltage accuracy v csl v in = 4.5v to 26v, skip = v cc fb = adj 0.990 1.020 v r ton = 96.75k (600khz), 167ns nominal -15 +15 r ton = 200k (300khz), 333ns nominal -10 +10 on-time accuracy (note 2) t on v in = 12v, v csl = 1.2v r ton = 303.25k (200khz), 500ns nominal -15 +15 % minimum off-time t off(min) (note 2) 350 ns fb forced above 1.0v (pwm, vtt, and vttr blocks); stdby = v cc 4 ma quiescent supply current (v cc ) i cc fb forced above 1.0v (ultra-skip and vttr blocks); stdby = agnd 475 a linear regulator (vtt) vtti input voltage range v vtti 1.0 2.8 v vtti supply current i vtti v vtti = 2.5v, v refin = 1.4v 50 a refin range v refin 0.5 1.5 v refin disable threshold v cc - 0.3 v high-side on-resistance (source, i vtt = 0.1a) 0.25 vtt internal mosfet low-side on-resistance (sink, i vtt = 0.1a) 0.36 vtt load regulation -50a to -1a i vtt +50a to +1a 17 mv/a
MAX17000 ?ddr2ddr3 ?? _______________________________________________________________________________________ 7 electrical characteristics (continued) (v in = 12v, v cc = v dd = v shdn = v refin = 5v, v csl = 1.8v, stdby = skip = agnd, t a = -40? to +85?, unless otherwise noted.) (note 1) note 1: limits are 100% production tested at t a = +25c. maximum and minimum limits over temperature are guaranteed by design and characterization. note 2: on-time and off-time specifications are measured from 50% point at the dh pin with lx = gnd, v bst = 5v, and a 250pf capacitor connected from dh to lx. actual in-circuit times might differ due to mosfet switching speeds. parameter symbol conditions min max units reference buffer (vttr) i vtt = 1ma -10 +10 vttr output accuracy (adj) refin to vttr i vtt = 3ma -20 +20 mv i vtt = 1ma -10 +10 vttr output accuracy (preset) v csl /2 to vttr i vtt = 3ma -20 +20 mv fault detection (smps) pgood1 output low voltage i sink = 3ma 0.4 v fault detection (vtt) pgood2 output low voltage i sink = 3ma 0.4 v fault detection v cc undervoltage-lockout threshold v uvlo(vcc) rising edge, ic disabled below this level; hysteresis = 200mv 4.0 4.4 v current limit valley current-limit threshold v limit v csh - v csl 15 25 mv smps gate drivers dh gate driver on-resistance r dh bst - lx forced to 5v 5 dl high 5 dl gate driver on-resistance r dl dl low 3 dl rising 10 dead time t dead dl falling 15 ns inputs and outputs logic input threshold shdn , stdby , skip, ovp, rising edge hysteresis = 300mv/600mv (min/max) 1.3 2 v
MAX17000 ?ddr2ddr3 ?? 8 _______________________________________________________________________________________ _________________________________________________________________________ ? (MAX17000 circuit of figure 1, v in = 12v, v dd = v cc = 5v, skip = gnd, t a = +25c, unless otherwise noted.) smps 1.8v efficiency vs. load current MAX17000 toc01 load current (a) efficiency (%) 1 0.1 20 30 40 50 60 70 80 90 100 10 0.01 10 standby mode pwm mode v in = 7v skip mode smps 1.8v efficiency vs. load current MAX17000 toc02 load current (a) efficiency (%) 1 0.1 20 30 40 50 60 70 80 90 100 10 0.01 10 standby mode pwm mode v in = 12v skip mode smps 1.8v efficiency vs. load current MAX17000 toc03 load current (a) efficiency (%) 1 0.1 20 30 40 50 60 70 80 90 100 10 0.01 10 standby mode pwm mode v in = 20v skip mode smps 1.8v output voltage vs. load current MAX17000 toc04 load current (a) output voltage (v) 0.1 1 0.01 1.79 1.80 1.81 1.82 1.78 0.001 10 pwm mode v in = 12v skip mode smps switching frequency vs. load current MAX17000 toc05 load current (a) switching frequency (khz) 468 2 100 50 200 150 300 250 350 0 0 10 v in = 12v v out = 1.8v smps valley-current limit vs. input voltage MAX17000 toc06 input voltage (v) current limit (a) 12 16 20 24 8 9.75 10.00 10.25 10.50 9.50 4 28 r sense = 2m? no-load supply current vs. input voltage MAX17000 toc07 input voltage (v) supply current (ma) 12 16 20 24 8 0.1 1 10 100 0.01 4 28 pwm mode, i cc + i dd skip mode, i cc + i dd skip mode, i in standby mode, i cc + i dd standby mode, i in pwm mode, i in no load preset 1.5v output voltage distribution MAX17000 toc08 output voltage (v) sample percentage (%) 1.500 1.505 1.495 10 20 30 40 50 0 1.490 1.510 sample size = 150 +85c +25c
MAX17000 ?ddr2ddr3 ?? _______________________________________________________________________________________ 9 startup waveform (heavy load) MAX17000 toc09 200s/div pgood1 shdn : 5v/div vddq : 500mv/div vtt : 500mv/div vttr : 500mv/div pgood1 : 2v/div i lx : 5a/div dl : 5v/div r load = 0.25? skip = gnd vttr vtt vddq dl i lx shdn shutdown waveform (discharge mode enabled) MAX17000 toc10 400s/div dl pgood2 : 5v/div pgood1 : 5v/div shdn : 10v/div i lx : 2a/div dl : 5v/div vddq : 2v/div vtt : 1v/div vttr : 1v/div vttr vtt vddq pgood1 pgood2 i lx shdn standby transition waveform MAX17000 toc11 2ms/div dl ton dl : 5v/div lx : 10v/div i lx : 2a/div stby : 5v/div vddq : 1v/div vtt : 1v/div ton: 10v/div vtt vddq i lx lx stby standby transition waveform MAX17000 toc12 200s/div dl ton lx : 10v/div i lx : 10a/div dl : 5v/div stby : 5v/div vddq : 2v/div vtt : 1v/div ton: 10v/div vtt vddq i lx lx stby smps load-transient response (skip mode) MAX17000 toc13 20s/div i load : 5a/div i lx : 5a/div vddq : 50mv/div lx : 10v/div vddq i lx i load lx smps load-transient response (skip mode) MAX17000 toc14 20s/div i load : 5a/div i lx : 5a/div vddq : 50mv/div lx : 10v/div vddq i lx i load lx _______________________________________________________________ ____ ?() (MAX17000 circuit of figure 1, v in = 12v, v dd = v cc = 5v, skip = gnd, t a = +25c, unless otherwise noted.)
MAX17000 ?ddr2ddr3 ?? 10 ______________________________________________________________________________________ _______________________________________________________________ ____ ?() (MAX17000 circuit of figure 1, v in = 12v, v dd = v cc = 5v, skip = gnd, t a = +25c, unless otherwise noted.) output overload waveform MAX17000 toc15 400s/div pgood2 : 2v/div pgood1 : 2v/div i lx : 10a/div dl : 5v/div vddq : 1v/div vtt : 1v/div vttr : 1v/div vddq vtt vttr dl i lx pgood2 pgood1 vtt voltage vs. source/sink load current MAX17000 toc16 load current (a) vtt voltage (v) -0.5 0 0.5 1.51.0 -1.5 -1.0 0.74 0.73 0.76 0.75 0.78 0.77 0.79 0.72 -2.0 2.0 v tti = 18v vtt offset voltage distribution at 300ma load MAX17000 toc17 offset voltage (mv) sample percentage (%) -10.0 -7.5 -12.5 10 20 30 40 50 0 -15.0 -5.0 sample size = 150 +85c +25c vtt overload fault waveforms (5ms timer) MAX17000 toc20 1ms/div vttr : 1v/div pgood1 : 2v/div pgood2 : 2v/div dl : 5v/div i lx : 2a/div vddq : 2v/div vtt : 1v/div vddq vtt vttr dl i lx pgood1 pgood2 vtt source current limit MAX17000 toc18 current limit (a) sample percentage (%) 3.0 3.5 2.5 10 20 30 40 50 0 2.0 4.0 sample size = 150 +85c +25c vtt sink current limit MAX17000 toc19 current limit (a) sample percentage (%) -3.0 -2.5 -3.5 10 20 30 40 50 0 -4.0 -2.0 sample size = 150 +85c +25c
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 11 vtt load-transient response (source) i vtt between 10ma and 1.5a MAX17000 toc21 20s/div i vtt : 1a/div vtt : 20mv/div vtt_ac i vtt vddq = 1.8v vtt load-transient response (sink) MAX17000 toc22 20s/div i vtt : 1a/div vtt : 20mv/div vtt_ac i vtt vddq = 1.8v vtt load-transient response (source/sink) MAX17000 toc23 20s/div i vtt : 1a/div vtt : 20mv/div vtt_ac i vtt vddq = 1.8v vttr output voltage vs. load current MAX17000 toc24 load current (ma) output voltage (v) -2 0 2 4 -4 0.73 0.75 0.74 0.71 0.72 0.77 0.78 0.76 0.79 0.70 -6 6 _______________________________________________________________ ____ ?() (MAX17000 circuit of figure 1, v in = 12v, v dd = v cc = 5v, skip = gnd, t a = +25c, unless otherwise noted.)
MAX17000 ?ddr2ddr3 ?? 12 ______________________________________________________________________________________ 1 ovp 2 pgood1 3 pgood2 4 stdby 5 vtts 6 vttr 7 pgnd2 8 vtt 9 vtti 10 refin 11 fb 12 csl 13 csh _______________________________________________________________ ____________ ? ovp?????/?smps ov??????smps ov ???ovp?????? ??(> 2.4v) = ?smps ov?smpsvttfet? ??(agnd) = ?smps ov?smpsvttfet? ??????smps?????15% (?)? pgood1??? ?smps????pgood1?? ??????? vtt ?????10 % (?) ?pgood2??? smps?vtt????pgood2?? ? shdn ??? stdby ???? MAX17000 ????? smps ????vtt(?)?????? ? stdby ????smps???vtt ?????vtt????v csl /2refin? ???refinv cc ?vttrv csl /2refin0.5v1.5v?? vttrv refin ??0.33 f???vttr?agnd vtt???pgnd2??? ???vttvtts?vtt?vtts?? ????vttivtt??ddr??smps? ???refinMAX17000???(vttr = vtts = v refin ) refinv cc ???v csl /2? ?0.5v1.5v??vttvttsvttr?? smps??v cc ??+1.8v??agnd??+1.5v?? ??(1.0v2.7v)fb????fb?+1.0v pwm??vttr???csl??? ???? ovp??v cc uvlocsl?16 ? ?mosfet? pwm?csh??? ???
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 13 14 ton 15 dh 16 lx 17 bst 18 dl 19 v dd 20 pgnd1 21 agnd 22 skip 23 v cc 24 shdn ? ep ____________________________________________________________________________ ?() ???????????? t sw = c ton x (r ton + 6.5k ?) c ton = 16.26pf ??ton?? ??lx?bst????uvlo?dh?? ?lx????1? ??????0.1 f6v??1?MAX17000????? ??pgnd1v dd ?? dl????3.3v?/?????(+4.5v+5.5v)??1 f ??v dd ?? ???mosfet????? ?? agnd?? ?????????? ??(> 2.4v) = ?pwm?? ??(agnd) = ?? ??4.5v5.5v???1 f??v cc agnd ????v cc shdn ?MAX17000?? ????25mv??dl?(1 a)??? ?ovp (ovp = ??)??????cslvtt?16 ? ?mosfet?????? ?ovp (ovp = ??)?????lxvttvttr?????? shdn ?ov? ?? ?agnd
MAX17000 ___________________________ ??? MAX17000 ???(?1)? vddqvtt?vttr ????ddrddr2ddr3 1????2???3 ???? ?ddr2ddr3 ?? 14 ______________________________________________________________________________________ 1. ????? 2. ?? v out = 1.5v to 1.8v at 10a v out = 1.5v to 1.8v at 6a component v in = 7v to 20v (300khz) v in = 7v to 16v (500khz) input capacitor (2x) 10f, 25v taiyo yuden tmk432bj106km 10f, 25v taiyo yuden tmk432bj106km output capacitor (2x) 330f, 2.5v ,12m (c2 case) sanyo 2r5tpe330mcc2 (2x) 220f, 2.5v, 21m (b2 case) sanyo 2r5tpe220mlb inductor 1.4h, 12a, 3.4m (typ) sumida cdep105(l)np-1r4 1.4h, 12a, 3.4m (typ) sumida cdep105(l)np-1r4 current-sensing resistor 2m , 0.5w (2010) vishay wsl20102l000fea 3m , 0.5w (2010) vishay wsl20103l000fea mosfets 30v, 20a n-channel mosfet (high side) fairchild fdms8690; 30v, 40a n-channel mosfet (low side) fairchild fdms8660s 30v 20a n-channel mosfet (high side) fairchild fdms8690; 30v 40a n-channel mosfet (low side) fairchild fdms8660s supplier phone website inductors dale (vishay) 402-563-6866 (usa) www.vishay.com nec/tokin america, inc. 510-324-4110 (usa) www.nec-tokinamerica.com panasonic corp. 65-231-3226 (singapore), 408-749-9714 (usa) www.panasonic.com sumida corp. 408-982-9660 (usa) www.sumida.com toko america, inc. 858-675-8013 (usa) www.tokoam.com capacitors avx corp. 843-448-9411 (usa) www.avxcorp.com kemet corp. 408-986-0424 (usa) www.kemet.com panasonic corp. 65-231-3226 (singapore), 408-749-9714 (usa) www.panasonic.com sanyo electric co., ltd. 81-72-870-6310 (japan), 619-661-6835 (usa) www.sanyodevice.com taiyo yuden 03-3667-3408 (japan), 408-573-4150 (usa) www.t-yuden.com tdk corp. 847-803-6100 (usa), 81-3-5201-7241 (japan) www.component.tdk.com sensing resistors vishay 402-563-6866 (usa) www.vishay.com mosfet fairchild semiconductor 800-341-0392 (usa) www.fairchildsemi.com diodes central semiconductor corp. 631-435-1110 www.centralsemi.com nihon inter electronics corp. 81-3-3343-84-3411 (japan) www.niec.co.jp
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 15 3. ??? shdn stdby skip operation 1 l h l hx smps output ramps up in skip mode with a 1.4ms (typ) ramp time. pgood1 is held low until the smps output is in regulation. vtt and vttr ramp up to the final voltage based on v csl /2 or v refin . pgood2 is held low until vtt is in regulation. 2 l hl x smps output ramps up in skip mode with a 1.4ms ramp time. pgood1 is held low until the smps output is in regulation. o nce c s l or fb i s i n r eg ul ati on, the p w m b l ock tur ns off and enter s stand b y m od e. vtt remains off throughout since stdby is low. pgood2 stays low throughout. the vtt discharge fet is enabled if ovp is high, but disabled if ovp is low. vttr ramps up to the final voltage based on v csl /2 or v refin . 3 h l hx ultra-skip and standby modes are exited and the full current capability of the MAX17000 is available. vtt ramps up after the internal smps block is ready. vtt ramps to the final voltage based on v csl /2 or v refin . pgood2 goes high when vtt is in regulation. 4h h h smps output is in forced-pwm mode. vtt and vttr are enabled. pgood1 is high when the smps output is in regulation. pgood2 is high when vtt is in regulation. 5h h l smps output is in normal skip mode. vtt and vttr are enabled. pgood1 is high when the smps output is in regulation. pgood2 is high when vtt is in regulation. 6h l x smps output is in ultra-skip mode. vtt is off and is high impedance. pgood2 is forced low. vttr is active and regulates to v csl /2 or v refin . 7 h lh x u l tr a- ski p or ski p m od e i s exi ted as the m ax 17000 r am p s the outp ut d ow n to zer o. v ttr tr acks v c s l /2 or v r e f in d ur i ng shutd ow n. after the s m p s outp ut r eaches 25m v , d l g oes l ow . 8 h ll x ultra-skip or skip mode is exited as the MAX17000 ramps the output down to zero. vttr tracks v csl /2 or v refin during shutdown. after the smps output reaches 25mv, dl goes low. vtt is not enabled throughout soft-shutdown. 9l x x dl low. internal16 ? discharge mosfets on csl and vtt enabled if ovp is high, but disabled if ovp is low.
MAX17000 ?ddr2ddr3 ?? 16 ______________________________________________________________________________________ _______________________________ ?? MAX17000?ddr?? ??/?ldo??? ?MAX17000maxim?quick-pwm ?????????? ????????? ?quick-pwm?????? ?pwm????????? ???????pwm??? ???1?MAX17000????2? MAX17000?? MAX17000 2a?/ldo?? ???-??/ ?????????? ????vtt????1 f ?????10 f20 f??? ?? 3ma?? ???? dh v dd v cc ton on/off fb bst v in 7v to 20v vddq +1.8v or 1.5v pgnd1 dl lx csl c in n h r sense n l r fba r fbb c vtti c vtt c vttr 0.33f l1 d1 pgnd2 vtti vttr vtts +5v slp_s3# vtt +1v to + 2.5v vtt = vddq/2 stdby shdn skip refin pgood2 +5v pgood1 agnd fb options: 1. connect fb to 5v for fixed +1.8v. 2. connect fb to gnd for fixed +1.5v. 3. use fb resistor-divider for adjustable output voltages. r ton csh 5v v cc v cc ovp 1 12 16 18 4 24 7 6 20 14 15 17 13 23 22 21 19 10 9 2 3 ep agnd pgnd 11 5 8 c bst 0.1f r3 100k? r2 100k? r1 10? c vdd 1f c vcc 1f agnd agnd pgnd agnd pgnd pgnd pgnd pgnd c out MAX17000 vttr = vddq/2 ?1. MAX17000???
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 17 vtt pos current limit vtt ss current limit vtt neg current limit bst lx vdd 1-shot trig q t off(min) csl ton error amp zero crossing ea shdn valley current limit pgnd1 s r q s r q dh 3mv 20mv soft-start/stop dl csl csh 1v ref agnd vcc int_ref fb fb decode int_fb vtti vtt pgnd2 vttr power-good1 pgood1 1.15v ovf power-good2 pgood2 smps fault detection 1.2v ovp smps fault latch smps fault 0.7v int_fb ovf uvf vtts v dd v dd csl vtt window comparator vtt fault smps fault 5ms timer vtt fault vtt fault vtti vtt pgnd2 stdby skip stdby ea 1-shot trig q ton on-time compute stdby run run 10ms timer run smps run smps run 1.4ms 5mv vtt pgnd2 smps runok stdby pgnd1 pgnd2 vtt csl 16? 16? refin csl r r 5mv vtt_en vtt_en run ovp v cc uvlo MAX17000 v dd - 0.3v ?2. MAX17000??
MAX17000 ?ddr2ddr3 ?? 18 ______________________________________________________________________________________ +5v???(v dd v cc ) ??MAX17000???5v???? 5v?????????95%5v? ?????ic?? ???pwm?5v? ?? ?? ??max1615 ??5v? 5v????pwm?? ?? i bias = i q + f sw q g(mosfet) = 2ma20ma (?) i q pwm??f sw ???? q g(mosfet) ?mosfetv gs = 5v?? ? ???pwm quick-pwm?????????? ????y??esr? k???pwm?? ?quick-pwm?MAX17000?dcr? ??esr ?????????? ???????? ?????? ?????(??250ns) ????????? ???????? ???? pwm???????? ?????????? ??????????? ??v in ???? ?ton??k? ???? c ton = 16.26pf0.075v??mosfet?? ???????? ????? ??????? ?? v dis ??????? pcb??v chg ? ??????pcb? ??t on MAX17000????? ???(skip = agnd) ??(skip = agnd)?? pfm????????? ??????? ???? ????MAX17000???? ????????50% ????(skip = agndi out MAX17000?? f vv t vv v sw out dis on in chg dis = + ? + () f cr k sw ton ton = + 1 65 ( .) ? t c r kv v v on ton ton csl in = + + ( . )( . ) 65 0 075 ?
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 19 skip stdby ?MAX17000 ???? skip stdby ??3 ?pwm??(skip = v cc ) ?pwm??( skip =v cc )??? ??????????????? ???????? ??dh???v out /v in ?pwm????????? ?pwm?????5v??? 2ma20ma???? stdby = agnd? skip ?? MAX17000?? ??MAX17000?pwm?? skip stdby ????? ??(stdby) ???MAX17000?????? ????MAX17000????? ????( stdby = agnd)?MAX17000? pwm????????? ??^??? MAX17000??? 1/6 ????????? ????vtt?(?)vttr? ????? skip ?? ???(stdby =v cc )?MAX17000 ?pwm???smps?vtt? ?vtt??vtt 160 s (?)??? ?vtti??4 inductor current i load = i peak /2 on-time 0 time i peak l v in - v out ?i ?t = ?3. / stdby smps output smps_runok pgood1 vtt output vtt current limit pgood2 160s vtt high impedance < 50s vttr output ?4. MAX17000???
MAX17000 ?ddr2ddr3 ?? 20 ______________________________________________________________________________________ ?? MAX17000maxim quick-pwm??? ??pwm? ?????????? ???? ?????? ? ?pwm??MAX17000?? ?v out ??? ???115%?5 ? (pgood1pgood2) MAX17000?pgood1??? ?smps??? ???pgood1?? ??smps???115% (?) 85% (?)??pgood1??smps ?115%/85%??MAX17000pgood1 smps????pgood1 pgood2? shdn v cc 1v2 ???ovp?ovp?? (ovp???)pgood1 pgood2???? vtt???? pgood2 ? ?vtt???? 10%?pgood2 ??vtt 10%?MAX17000 pgood2pgood2???5ms (?) MAX17000?? ???pgood1pgood2v dd ? ???100k ? poruvlo v cc ?2v??y(por) ???? ovp?por??cslvtt?16 ? ?mosfet?ovp?cslvtt?? 16? ?mosfet??? v cc 4.1v (?)??v cc ??(uvlo) ??v cc 4.1v? pwm?v cc uvlo (?)???dl?? ovp?cslvtt??16 ? ?mosfet ? MAX17000 pwm?????? shdn ???? pwm1.4ms??0v??? ?????? ??MAX17000??? skip stdby ?? skip stdby MAX17000 vtt ldo??? vtt????160 s? ?vtt???160 s ?(??)?? vttr ?I?? inductor current i limit i load 0 time i peak i lim(val) = i load(max) 1- lir 2 () ?5. ??
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 21 shdn ??????? smps??(uv?200 s (?)) vtt???5ms (?)? ic???2.8ms?0v ?????? ??? dl?? ?ovp (ovp = v cc )?cslvtt??16 ? ?mosfet?? shdn ? ???ovp (ovp = agnd)?cslvtt ??16 ? ?mosfet?????? ? MAX17000?pwm?/???? ovp?/???4? stdby int_ref smps output refok smps_runok pgood1 160s shdn vtt output vttr output dl vtt current limit pgood2 1.4ms 2.8ms vtt 16? fet skip fpwm csl 16? fet 25mv ?6. ovp??MAX17000/??
MAX17000 ?ddr2ddr3 ?? 22 ______________________________________________________________________________________ ovp mode reaction/driver state comment shutdown ( shdn = low) dl immediately pulled low. vttr tracks the smps output during soft-shutdown. csl and vtt are high impedance at the end of soft-shutdown (16 discharge mosfets disabled). outputs high- impedance in shutdown. smps uvp dl immediately pulled low. vttr tracks the smps output during soft-shutdown. csl and vtt are high impedance at the end of soft-shutdown (16 discharge mosfets disabled). smps latched fault condition. smps ovp (disabled) controller remains active (normal operation). note: an ovp detection still pulls pgood1 low. only pgood1 pulled low; fault not latched. vtt < -90% or vtt > +110% pgood2 immediately pulled low. soft-shutdown initiated if fault persists for more than 5ms (typ). dh not used in soft-shutdown. dl low after soft-shutdown completed. vttr tracks the smps output soft-shutdown. vtt latched fault condition if fault persists for more than 5ms (typ). ovp disabled discharge disabled (ovp = low) v cc uvlo falling edge dl and dh immediately pulled low. pgood1 and pgood2 immediately forced low. vtt and vttr blocks immediately disabled (high impedance, no 16 discharge on outputs). ? shutdown ( shdn = low) soft-shutdown initiated. dl high after soft-shutdown completed. vttr tracks the smps output during soft-shutdown. internal 16 discharge mosfets on csl and vtt enabled after soft-shutdown. 16 discharge mosfets on csl and vtt enabled in shutdown. smps uvp soft-shutdown initiated. dh not used in soft-shutdown. dl low after soft-shutdown completed. vttr tracks the smps output during soft-shutdown. internal 16 discharge mosfets on csl and vtt enabled after soft-shutdown. smps latched fault condition. smps ovp (enabled) dl immediately latched high, dh forced low. pgood1 and pgood2 immediately forced low. vtt and vttr blocks immediately shut down. internal 16 discharge mosfets on csl and vtt enabled. smps latched fault condition. ovp enabled discharge enabled (ovp = high) vtt < 90% or vtt > 110% pgood2 immediately pulled low. soft-shutdown initiated if fault persists for more than 5ms (typ). dh not used in soft-shutdown. dl low after soft-shutdown completed. vttr tracks the smps output during soft-shutdown. internal 16 discharge mosfets on csl and vtt enabled after soft-shutdown. vtt latched fault condition if fault persists for more than 5ms (typ). ovp enabled discharge enabled (ovp = high) v cc uvlo falling edge dl and dh immediately pulled low. pgood1 and pgood2 immediately forced low. vtt and vttr blocks immediately disabled. internal 16 discharge mosfets on csl and vtt enabled immediately. ? 4. ????
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 23 smps?(ovp) smps????115%ovp ?? (ovp = v cc )? pgood1pgood2?dl??vttvttr ???cslvtt??16 ? ? mosfet???1?(? mosfet)????v cc 1v ?? shdn?g ovpagnd?(4)ovp?ovp? pgood1????115% ???cslvtt??16 ? ?mosfet smps??(uvp) smps???85% 200 s (?)??? pgood1pgood2??dl? ?????dh????? MAX17000?dldh?cslvtt ??16 ? ?mosfetv cc 1v?? shdn??g vtt??? vtt???? 10%5ms (?)?pgood1 pgood2??dl??? ???dh?????MAX17000 ?dldh?cslvtt??16 ? ?mosfetv cc 1v?? shdn ??g ?? MAX17000??3+160 c? ??pgood1pgood2 ???????15 c??? shdn ?v cc ?v cc por _______________________________ ? ??????(?)??? ?????? ??????? ??(v in(max) )? ???????? (v in(min) )???? ??????? ?y??? ????? (i load(max) )?????????? ?? ???? ??(i load )?? ??mosfet??? ????i load =i load(max) x 80% ovp mode reaction/driver state comment thermal fault dl and dh immediately pulled low. pgood1 and pgood2 immediately forced low. vtt and vttr blocks immediately disabled (high impedance, no 16 discharge on outputs). active-fault condition. v cc uvlo rising edge activate int_ref once v cc rises above uvlo, and shdn = high. once refok is valid (high), initiate the soft-start sequence. dl remains low until switching/soft-start begins. ? v cc por rising edge dl forced low. ? general shutdown and fault conditions v cc por falling edge dl = don?t care. v cc less than 2vt is not sufficient to turn on the mosfets. ? 4. ????()
MAX17000 ?ddr2ddr3 ?? 24 ______________________________________________________________________________________ ????????? mosfet??v in 2 ? ?????? ?? ??mosfet?????? ????? ????? ??? ?????????? ????? ??????? ???(?? )?????? ??20%50%? ? ???(????lir)?? ? ??????g?? ????200khz?o? ? ?? ?? ???(i peak )2? ? ????? ?????? i load(max) ????? i limit(low) ??? (dcr) ????cshcsl?17mv ( ?) dcr???????? ???? r dcr ??r dcr ? ????????1 c 0.5%?k??? ??dcrntc ??? (?7)???????? ??? r sense = v limit /i limit ii lir limit low load max ( ) () > ? ? ? ? ? ? ? 1 2 ii lir peak load max = + ? ? ? ? ? ? () 1 2 l vv fi lir v v in out sw load max out in = ? ? ? ? ? ? ? ? () ?? ? ? ? ? sense resistor l MAX17000 c out input (v in ) c in csl csh pgnd1 dl dh lx c eq r eq n h n l d l l esl r sense c eq r eq = l esl r sense a) output series resistor sensing ?7a. (1/2)
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 25 ?????? 1%??k?7a? ????? ?????? ??????rc (l esl ) ??????? ?rc(?7b)?rc ??? ? r cs ???r dcr ??? ????? r dcr ??????? ?? mosfet?(dhdl) dhdl?????mosfet ????mosfet???? ????????v in - v out ??(dh)?1.2a ?(dl)?1.0a2.4a? ??????dh?mosfet bst??????dl? ?5v???(v dd ) pwm? ???(esr)??? ???????esr??? ? ????????? ???????? esr?????? ???? ??????????esr? ??????????? ????esr ? rr v i esr pcb step load max + () ? () r l c rr dcr eq = + ? ? ? ? ? ? 1 1 1 2 r r rr r cs dcr = + 2 12 cr l r eq eq esl sense = MAX17000 c out input (v in ) c in b) lossless inductor sensing for thermal compensation: r2 should consist of an ntc resistor in series with a standard thin-film resistor. csl csh pgnd1 dl dh lx c eq r1 r2 n h n l d l l inductor r dcr r cs = r2 r dcr r1 + r2 r dcr = l [ 1 + 1 ] c eq r1 r2 ?7b. (2/2)
MAX17000 ?ddr2ddr3 ?? 26 ______________________________________________________________________________________ ??esr? f sw ??? (???)?? ??esr?????? ??????esr??? ?()?????v sag v soar ??????? ??3??? ???????(?esr?? ????)?? pwm?? quick-pwm?????? ?????esr?? ? c out ?r esr ?? kr sense ?(?7)a cs ? ?2? ??300khz??????? 95khz?50khz????? ???50khz?esr? ??????? (?7)?15mv p-p ?esr?15mv/(10a x 0.3) = 5m ? ?330 f9m? ???? 4.5m ? ()esr1/(2 x 330 f x 9m ? ) = 53khz esr?? ?????esr????? ???t?esr??? ?????dcr?? ????? ?????dcr ( )??????y ?????????? ? ????(v soar )? ???? ??????? ???????????? ? ??????? ???? esr???????? ????? ?????? ???????? esr????? ????? ??????? ????????? ???????? ^?????? ???/3?I?? ? ? ????(i rms )? ?1??i rms rmsv in = 2v out ?? ?? i rms = 0.5 x i load i i v v vv rms load in out in out = ? ? ? ? ? ? ? () r r ar eff esr cs sense = + f rc sw eff out 1 2 r vf l vv v v esr in sw in out out ripp ? () ? ? ? ? ? ? ? ? l le
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 27 ????(? os-con)???? ?????? quick-pwm?????? ???????? rms+10 c? ?? mosfet? mosfet ?????( > 20v) ???????? ? ? mosfet (n h )??v in(min) v in(max) ????? v in(min) ?v in(max) ?? ????v in(min) ?v in(max) ?????n h ?(r ds(on) c gate )? v in(max) ?v in(min) ? ????n h ??(r ds(on) c gate ) v in ??? ? ?mosfet??(r ds(on) )??? ???(?8sodpakd 2 pak) ?????dl????? ? ??mosfet????-? ??????( mosfet? (dhdl) ) mosfet ?????????? mosfet (n h )????? ? ???????? ??mosfet???r ds(on) ? mosfet???(r ds(on) ) ?????15v??? ??????? ??? mosfet (n h )???? ?p?? ?????? ??????? ??pcb????? ??n h ?? ??? c oss n h mosfet?q g(sw) ?n h mosfet?i gate ??/?? (??2.2a) ????c x v in 2 x f sw ????mosfet??? ????mosfet (???? ?r ds(on) )?v in(max) ???? ????mosfet ??mosfet (n l )?????? ?? mosfet?????? i load(max) ? ??????? ? ?? ii i load valley max inductor =+ ? ? ? ? ? ? () ? 2 () () =+ ? ? ? ? ? ? i i lir valley max load max 2
MAX17000 ?ddr2ddr3 ?? 28 ______________________________________________________________________________________ i valley(max) ?? ???mosfet?? ???? ???????(dl)?? mosfet?????? ????????? ??????? pwm? ?? MAX17000 dual mode tm ?????? ?fbagnd?1.5v?fbv cc ?1.8v ?fb?out??1.0v? ?? ???(?8)1.0v2.7v?? MAX17000fb?????(1.0v)? ?? v fb ?1.0v vtti?? ?vtti??vtti??/ ??????vtti?buck ???? ???vtt???? ??vtti????? ?vtti???? ?????? vtt? vttvtti??refin refinMAX17000???(vttr = vtts = v refin )?0.1v2.0v??vtt vtts?vttr??refinv cc ? csl/2?vtt??vttv csl ??v csl /2?MAX17000? ???????? vtt? vtt 300ma??9 f??? ?????1.2mhz ( ?)??????? ???????esresl ????? vv r r out fb fba fbb = + ? ? ? ? ? ? 1 fb v out pgnd1 dl lx csl c out l1 n l d1 r fba r fbb csh MAX17000 ?8. ??v out dual modemaxim integrated products, inc.??
MAX17000 ?ddr2ddr3 ?? ______________________________________________________________________________________ 29 ?fet??? ???1.5a ?20 f?1.5a ?20 f? ?? ?esr??? c out ??1??2 r esr ?????? ? ????( ?)??(?)? ???? vttr? vttr??vtt? ???esr??? ?? 4ma?????? 0.33 f??(r esr < 0.3 ? )?vttr ??? MAX17000 ?1??pwm??vtt ldo?vttr?? 2w?24 tqfn??? 2.22w???? ?vtt??100ma200mavttr a??intel?ddr1 3maddr2 1ma???? ?MAX17000??? ????vttvttr ??vtti??? refin???vtti?? vtti??/?????? vtti?buck?? ? ?? ??(c bst )??mosfet? ???mosfet??? 0.1 f??????? ?0.1 f????mosfet ???mosfet? ??^200mv?????? q gate ??mosfet? ??fds6612a nmosfet ??fds6612a??? 13nc (v gs = 5v)????? ???????0.1 f? ? c nc mv f bst == 13 200 0 065 . c q mv bst gate = 200 pd vttr ma v mw () . . == 3 09 27 pd vtt a v w () . . = = 2 09 18 pd pwm i v ma v w bias () . = = = 540 502 f c i a gbw out load = 36 15 . rm i a esr max load _ . = 5 15 ? cf i a out min load _ . = 20 15 ?
MAX17000 ?ddr2ddr3 ?? 30 ______________________________________________________________________________________ _______________________________ ?? pcb? pcb????????? ?????????? ????????? ????????pcb?? ?????????? ???? ??????? ??pcb (2oz?1oz)? 1%??pcb??? ???????? ?????? ??(r sense )?cshcsl ?????? ??????? ???mosfet??????? mosfet????? ???(bstlxdhdl)??? (refinfbcshcsl) ? 1) ??????(?mosfet ?c in c out ????)? ?????? 2) ic??mosfet??? mosfet ???lx agnddh?dl? ???dldh???(mosfet ic 1????50mil100mil)? ?????? 3) ??(bst??v dd ) ic? 4) dc-dc???1?9? ?? 2???????? ; ??????????? ??ic?? 5) ?????? ?dc-dc???
MAX17000 ?ddr2ddr3 ?? kelvin sense vias under the inductor (see evaluation kit) via to power ground connect agnd and pgnd1 to the controller at the exposed pad connect the exposed pad to analog ground x-ray view. ic mounted on bottom side of pcb. power stage layout (top side of pcb) ic layout v dd bypass capacitor v cc bypass capacitor vtti bypass capacitor vtt bypass capacitor inductor l1 output smps c out input power ground c eq csl csh r2 r1 r ntc kelvin-sense vias to inductor pad inductor dcr sensing c out c in1 ?9. pcb? _______________________________ ?? process: bicmos _______________________________ ?? ??????? china.maxim-ic. com/packages ????+ # -? rohs??????????? ??rohs???? ? ? ?? 24 tqfn-ep t2444+4 21-0139 90-0022 ______________________________________________________________________________________ 31
MAX17000 ?ddr2ddr3 ?? maximmaxim????????maxim??????????? 32 ____________________ maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2011 maxim integrated products maxim maxim integrated products, inc. ??? 0 5/08 ? 1 2/11 31 ____________________________________________________________________________ ?? ? ? ? ?? package information ? maxim 8328 100083 ?800 810 0310 010-6211 5199 010-6211 5299

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