bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12v input / programmable output / vrm11 compatible ? high efficiency means less power dissipation ? remote on/off ? wide input range (10.8 ? 13.2v) ? i2c/smbus available ? consult factory ? 2-wire remote sense ? 7 bit vid digital voltage programming. description the grnd-40a series is a non-isolated step down dc/ dc converter providing up to 45a of output current and designed to be compatible with the intel vrm11 require ments. standard features include remote on/off, over current protection, remote sense, vr_fan signal, vr_h ot signal and a power good signal. this product also makes use of adaptive positioning to improve transient response performance. these products may be used almost anywhere low-voltage silicon is being employed and a nominal 12v source is available. typical applications include file servers, work stations and other computing applications. part selection output voltage input voltage output current (thermal design) output current (peak current) typical efficiency model number 0.82 ? 1.60v 12v 35a 45a 85% GRND-40A160 input specifications parameter min typ max notes input voltage range 10.8 vdc 13.2 vdc input current (disabled) 17ma input current (full load) 8.0a reflected ripple current 400ma rms with 2 330uf, 25mohm capacitor and 200nh of input inductance. output specifications parameter min typ max notes output current 0a 35a 45a thermal design peak current rating set point accuracy 1.27v 1.28v 1.29v no load, excluding adaptive positioning, vrm11 vid 0x32 adaptive positioning (droop impedance) 1.25 mohm ripple and noise 20mv pk-pk, 0 to 20mhz bandwidth full load. note 3 turn on time 15ms 30ms transient response deviation settling time tbd tbd di/dt = 5a/us load step =50% of max load. remote sense compensation 0.3vdc output capacitance s ee note 1,400uf see note consult factory regarding external capacitance outside of this range GRND-40A160 rev. b
? 2007 bel fuse inc. specifications subject to change without notice. 082807 corporate far east europe bel fuse inc. bel fuse ltd. bel fuse europe ltd. 206 van vorst street 8f/ 8 luk hop street preston technology management centre jersey city, nj 07302 san po kong marsh lane, suite g7, preston tel 201-432-0463 kowloon, hong kong lancashire, pr1 8ud, u.k. fax 201-432-9542 tel 852-2328-5515 tel 44-1772-556601 www.belfuse.com fax 852-2352-3706 fax 44-1772-888366 www.belfuse.com www.belfuse.com non-isolated dc/dc converters 10.3 ?13.2v input / programmable output / 90a vrm11 general specifications parameter specification switching frequency tbd mhz typical (fixed) dimensions inches mm 3.8 x 1.055 x 0.393 96.5 x 26.8 x 9.98 weight tbd operating temperature 0 c to 65 c non-operating temperature -40 c to 100 c protection features over current undervoltage 110% to 170% max io uvlo vin < 10.0v remote on/off active high efficiency (full load) 1.3v output 35a load 85% pin connections row a row b pin function pin function 1 pwrgd 164 vbias 2 reserved 163 reserved 3 outen 162 ll0 4 ll1 161 vid6 5 vid5 160 vid4 6 vid3 159 vid2 7 vid1 158 vid0 8 reserved 157 lpl 9 +sense 156 -sense 10 reserved 155 vidsel 11 vr_hot 154 vrm_pres 12 imon 153 reserved key key 13-16 vin 149-152 vin 17-20 gnd 145-148 gnd 21-24 vout 141-144 vout 25-26 gnd 139-140 gnd 27-30 vout 135-138 vout 31-34 gnd 131-134 gnd 35-38 vout 127-130 vout 39-42 gnd 123-126 gnd 43-46 vout 119-122 vout 47-48 gnd 117-118 gnd 49-52 vout 113-116 vout 53-56 gnd 109-112 gnd 57-60 vout 105-108 vout 61-64 gnd 101-104 gnd 65-68 vout 97-100 vout 69-70 gnd 95-96 gnd 71-74 vout 91-94 vout 75-78 gnd 87-90 gnd 79-82 vout 83-86 vout notes: 1. mechanical key between pins 12 & 13 and 152 & 153 2. recommended mating connector molex icool p/n 87787-1011. 3. measured with 2 x 560u 7mohm esr al poly and 28 x 10u 10mohm esr ceramic capacitors on output. 4. leave reserved pins float ing in end use application.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12v input / programmable output / vrm11 compatible signal definitions symbol definitions vin input power to the converter gnd common return for both input and output vid0, vid1, vid2, vid3, vid4, vid5 vid6 logic level inputs used to set the output voltage, refer to vid table. connect vid0 thru vid6 pins to open-drain outputs with external pull-up resistors. valid logic low is -0.3v to 0.4v, valid logic high level is 0.8v to 5.5v. vidsel digital input used to select between extended vr10 and vr11 vid tables. pwrgd the open drain power good signal indicates the output voltage is within 10% of the vid setpoint. +sense -sense remote voltage sense lines. connect these at the point of load, to vout and gnd respectively. vout output voltage available to the load. outen logic level input used to enable the converter when high. valid logic low is -0.3v to 0.4v, valid logic high level is 0.8v to 5.5v. ll0/ll1 load line select pins. working in conjunction with vid_select, ll0/ll1 are used to select load line slope. currently only 1.25mohm slope is supported. module can be configured to support multiple load line slopes. imon analog average load current signal, scaling tbd. vbias 3.3v bias input. 3.1 ? 3.5v, 200ma max, required for operation of unit. vr_hot open-drain output signal, pulled actively low indicating a thermal event has been detected on the vrm vrm_pres signal used by system to indicate the vrm is present in the design. lpl low power lockout. this signal has a 10k pull-down resistor internal to the vrm. the application board ties this signal to outen, so the vrm will turn on only when plugged into a socket with this configuration. lpl and outen are and?ed in the vrm, both must be logic high in order for the vrm output to be enabled.
? 2007 bel fuse inc. specifications subject to change without notice. 082807 corporate far east europe bel fuse inc. bel fuse ltd. bel fuse europe ltd. 206 van vorst street 8f/ 8 luk hop street preston technology management centre jersey city, nj 07302 san po kong marsh lane, suite g7, preston tel 201-432-0463 kowloon, hong kong lancashire, pr1 8ud, u.k. fax 201-432-9542 tel 852-2328-5515 tel 44-1772-556601 www.belfuse.com fax 852-2352-3706 fax 44-1772-888366 www.belfuse.com www.belfuse.com non-isolated dc/dc converters 10.3 ?13.2v input / programmable output / 90a vrm11 vrm11.0 vid codes hex vo (vdc) 0 0 off 0 1 off 0 2 1.60000 0 3 1.59375 0 4 1.58750 0 5 1.58125 0 6 1.57500 0 7 1.56875 0 8 1.56250 0 9 1.55625 0 a 1.55000 0 b 1.54375 0 c 1.53750 0 d 1.53125 0 e 1.52500 0 f 1.51875 1 0 1.51875 1 1 1.51250 1 2 1.50625 1 3 1.50000 1 4 1.49375 1 5 1.48750 1 6 1.48125 1 7 1.47500 1 8 1.46875 1 9 1.46250 1 a 1.45625 1 b 1.45000 1 c 1.44375 1 d 1.43750 1 e 1.43125 1 f 1.42500 2 0 1.41875 2 1 1.41250 2 2 1.40625 2 3 1.40000 2 4 1.39375 2 5 1.38750 2 6 1.38125 2 7 1.37500 2 8 1.36875 2 9 1.36250 2 a 1.35625 2 b 1.35000 2 c 1.34375 2 d 1.33750 2 e 1.33125 2 f 1.32500 hex vo (vdc) 3 0 1.31250 3 1 1.30625 3 2 1.30000 3 3 1.29375 3 4 1.28750 3 5 1.28125 3 6 1.27500 3 7 1.26875 3 8 1.26250 3 9 1.25625 3 a 1.25000 3 b 1.24375 3 c 1.23750 3 d 1.23125 3 e 1.22500 3 f 1.21875 4 0 1.21250 4 1 1.20625 4 2 1.20000 4 3 1.19375 4 4 1.18750 4 5 1.18125 4 6 1.17500 4 7 1.16875 4 8 1.16250 4 9 1.15625 4 a 1.15000 4 b 1.14375 4 c 1.13750 4 d 1.13125 4 e 1.12500 4 f 1.11875 5 0 1.11250 5 1 1.10625 5 2 1.10000 5 3 1.09375 5 4 1.08750 5 5 1.08125 5 6 1.07500 5 7 1.06875 5 8 1.06250 5 9 1.05625 5 a 1.05000 5 b 1.04375 5 c 1.03750 5 d 1.03125 5 e 1.02500 5 f 1.01875 hex vo (vdc) 6 0 1.01250 6 1 1.00625 6 2 1.00000 6 3 0.99375 6 4 0.98750 6 5 0.98125 6 6 0.97500 6 7 0.96875 6 8 0.96250 6 9 0.95625 6 a 0.95000 6 b 0.94375 6 c 0.93750 6 d 0.93125 6 e 0.92500 6 f 0.91875 7 0 0.91250 7 1 0.90625 7 2 0.90000 7 3 0.89375 7 4 0.88750 7 5 0.88125 7 6 0.87500 7 7 0.86875 7 8 0.86250 7 9 0.85625 7 a 0.85000 7 b 0.84375 7 c 0.83750 7 d 0.83125 7 e 0.82500 7 f 0.81875 note: vids with vid7=1 not shown because this vrm does not have a vid7 pin.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12v input / programmable output / vrm11 compatible mechanical outline drawing
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