SY8009A/sy8009b high efficiency 1.5mhz/1mhz, 1.5a/2a synchronous step down regulator SY8009A/b rev1.0 silergy corp. confident ial prepared for customer use only 1 general description the SY8009A and sy8009b are highefficiency, high frequency synchronous stepdown dcdc regulator ics capable of delivering up to 1.5a/2a output currents. the sy8009 family operate over a wide inp ut voltage range from 3v to 5.5v and integrate main switch and synchronous switch with very low r ds(on) to minimize the conduction loss. low output voltage ripple and small external induct or and capacitor sizes are achieved with greater than 1mhz switching frequency. ordering information temperature code optional spec code sy8009 ( ) package code temperature code optional spec code sy8009 ( ) package code temperature range: 40c to 85c ordering number package type note SY8009Aaac sot235 1.5a sy8009babc sot236 2a sy8009bebc ssot236 2a features low r ds(on) for internal switches (top/bottom) SY8009A: 180m/120m, 1.5a, sot235 sy8009b:100m/80m,2.0a sot236, ssot236 35.5v input voltage range high switching frequency minimizes the external components SY8009A: 1.5mhz sy8009b: 1mhz internal softstart limits the inrush current 100% dropout operation rohs compliant and halogen free compact package: sot235, sot236 and super sot236 are pincompatible. other packages are available upon requests applications lcd tv set top box net pc mininotebook pc access point router typical applications in gnd en c in v in on/ off lx fb c out v out r 1 r 2 l c 1 (opt.) load current (a) efficiency (%) 80 82 84 86 88 90 92 94 96 0 0.4 0.8 1.2 1.6 2 v in =3.3v v in =4.2v v in =5.5v v out =1.8v figure 1.schematic diagram figure 2. efficiency vs load current free datasheet http://
SY8009A/sy8009b SY8009A/b rev1.0 silergy corp. confident ial prepared for customer use only 2 pinout (top view) 1 2 3 4 5 6 en gnd lx fb nc in sot23-5(SY8009A) so t23-6(sy8009b) ssot 23-6(sy8009b) part number package type top mark SY8009Aaac sot235 ad xyz sy8009babc sot236 cu xyz sy8009bebc ssot236 as xyz note x=year code, y=week code, z= lot number code. pin name pin number pin description en 1 enable control. pull high to turn on. do not f loat. gnd 2 ground pin lx 3 inductor pin. connect this pin to the switchin g node of inductor. in 4 input pin. decouple this pin to gnd pin with a t least 1uf ceramic cap. fb 6 output feedback pin. connect this pin to the c enter point of the output resistor divider (as shown in figure 1) to program the output voltage: vout=0.6*(1+r 1 /r 2 ). absolute maximum ratings (note 1) supply input voltage 6.0v enable, fb voltage v in + 0.6v power dissipation, p d @ t a = 25c, sot235, sot236, ssot236 0.6w package thermal resistance (note 2) sot235, sot236, ssot236, ja 170c/w sot235, sot236, ssot236, jc 130c/w junction temperature range 125c lead temperature (soldering, 10 sec.) 260c storage temperature range 65c to 150c esd susceptibility (note 2) hbm (human body mode) 2kv mm (machine mode) 200v dynamic lx voltage in 50ns duration in+3v to gnd4v recommended operating conditions (note 3) supply input voltage 3v to 5.5v junction temperature range 40c to 125c ambient temperature range 40c to 85c free datasheet http://
SY8009A/sy8009b SY8009A/b rev1.0 silergy corp. confident ial prepared for customer use only 3 electrical characteristics (v in = 5v, v out = 2.5v, l = 2.2uh, c out = 10uf, t a = 25c, unless otherwise specified) parameter symbol test conditions min typ max unit input voltage range v in 3 5.5 v quiescent current i q i out= 0 , v fb =v ref 105% 80 a shutdown current i shdn en=0 0.1 1 a feedback reference voltage v ref 0.588 0.6 0.612 v fb input current i fb v fb =v in 50 50 na SY8009A 180 m pfet ron r ds(on) , p sy8009b 100 m SY8009A 120 m nfet ron r ds(on) , n sy8009b 80 m SY8009A 1.8 a pfet current limit i lim sy8009b 2.5 a en rising threshold v enh 1.5 v en falling threshold v enl 0.4 v input uvlo threshold v uvlo 2.7 v uvlo hysteresis v hys 0.1 v i out =200ma, SY8009A 1.5 mhz oscillator frequency f osc i out =500ma, sy8009b 1 mhz min on time 50 ns max duty cycle 100 % thermal shutdown temperature t sd 160 c note 1 : stresses listed as the above absolute maximum ra tings may cause permanent damage to the device. these are for stress ratings. functional operation of the device at these or any other conditions beyo nd those indicated in the operational sections of the specif ications is not implied. exposure to absolute maxim um rating conditions for extended periods may remain possibil ity to affect device reliability. note 2 : ja is measured in the natural convection at ta = 25 c on a low effective single layer thermal conducti vity test board of jedec 513 thermal measurement standa rd. pin 2 of sot235/ssot236 packages is the cas e position for jc measurement. test condition: device mounted on 2 x 2 fr4 substrate pcb, 2oz copper, with minimum recommended pad on top layer and thermal vias to bo ttom layer ground plane note 3: the device is not guaranteed to function outside i ts operating conditions. free datasheet http://
SY8009A/sy8009b SY8009A/b rev1.0 silergy corp. confident ial prepared for customer use only 4 sot23-5 package outline & pcb layout design 2.40 0.80 0.55 0.95 typ 2.40 0.80 0.55 0.95 typ 1.50 - 1.70 0.30 - 0.50 2.80 - 3.10 2.70 - 3.00 1.50 - 1.70 0.30 - 0.50 2.80 - 3.10 2.70 - 3.00 recommended pad layout 0.1 - 0.15 0.25 ref 0.3 - 0.6 0.1 - 0.15 0.25 ref 0.3 - 0.6 1.0 - 1.3 0.01 - 0.1 1.90 typ 0.95 typ 1.0 - 1.3 0.01 - 0.1 1.90 typ 0.95 typ notes: all dimensions are in millimeters. all dimensions dont include mold flash & metal burr. free datasheet http://
SY8009A/sy8009b SY8009A/b rev1.0 silergy corp. confident ial prepared for customer use only 5 sot23-6 package outline & pcb layout design 0.95 2.40 1.90 0.60 1.00 0.95 2.40 1.90 0.60 1.00 1.50 - 1.70 0.30 - 0.50 2.80 - 3.10 2.70 - 3.00 1.50 - 1.70 0.30 - 0.50 2.80 - 3.10 2.70 - 3.00 recommended pad layout 0.1 - 0.15 0.25 ref 0.3 - 0.6 0.1 - 0.15 0.25 ref 0.3 - 0.6 1.0 - 1.3 0.01 - 0.1 1.90 typ 0.95 typ 1.0 - 1.3 0.01 - 0.1 1.90 typ 0.95 typ notes: all dimensions are in millimeters. all dimensions dont include mold flash & metal burr. free datasheet http://
SY8009A/sy8009b SY8009A/b rev1.0 silergy corp. confident ial prepared for customer use only 6 ssot23-6 package outline & pcb layout design 0.95 2.40 1.90 0.60 1.00 0.95 2.40 1.90 0.60 1.00 2.30 - 2.50 2.50 - 3.00 0.25 - 0.40 recommended pad layout 0.30 - 0.60 0.10 - 0.20 0.30 - 0.60 0.10 - 0.20 2.95 - 3.10 0.90 - 1.00 0.01 - 0.10 0.95 typ 2.95 - 3.10 0.90 - 1.00 0.01 - 0.10 0.95 typ notes: all dimensions are in millimeters. all dimensions dont include mold flash & metal burr. free datasheet http://
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