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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output ? non-isolated ? under-voltage lockout (uvlo) ? high efficiency ? over temperature protection ? high power density ? ocp/scp ? excellent thermal performance ? wide input ? low cost ? wide trim ? flexible output voltage sequencing ? remote on/off ? active low/high (option) ? remote sense ? industrial temperature range ? able to sink/source current description the bel srbc-10a2ax modules are a series of non-isolated dc/dc converters that deliver up to 10 a of output current with full load efficiency of 93% at 3.3 vdc output. these modules provide precisely regulated voltage programmable via external resistor from 0.75 vdc to 5.0 vdc over a wide range of input voltage (8.3 vdc - 14 vdc). these modules have a sequencing feature that enables designers to implement various types of output voltage sequencing when powering multiple voltages on a board. the open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. standard features include remote on/off, over current protection, short current protection, wide input, and programmable output voltage. part selection output voltage input voltage max. output current max. output power typical efficiency model number active low model number active high 0.75 v - 5.0 v 8.3 v - 14 v 10 a 50.0 w 95% srbc-10a2al srbc-10a2a0 notes : 1. add ?g? suffix at the end of the model number to indicate tray packaging. 2. all part numbers above indicate rohs 6. change the second letter "r" to "7" for rohs 5 part numbers. absolute maximum ratings parameter min typ max notes input voltage (continuous) -0.3 v - 15 v output enable terminal voltage -0.3 v - 15 v sequencing voltage 1 -0.3 v - vin ambient temperature -40 c - 85 c storage temperature -55 c - 125 c notes : all specifications are typical at 25 c unless otherwise stated. 1. srbc-10a2ax series of modules include a sequencing feature that enables users to implement various types of output voltage sequencing in their applications. this is accomplished via an additional sequencing pin. when the sequencing feature is not used, tie the seq pin to vin or leave it unconnected. srbc-10a2ax rohs com p liant rev.a
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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output input specifications parameter min typ max notes input voltage vo, set 3.63 v vo, set > 3.63 v 8.3 v 8.3 v 12 v 12 v 14 v 13.2 v input current (full load) - - 6.5 a an input line fuse must always be used. input current (no load) - 50 ma - remote off input current - 2 ma - input reflected ripple current (pk-pk) - - 400 ma input reflected ripple current (rms) - - 150 ma tested with one 1000 uf/25 v al input capacitor with esr=0.03 ohm max and 4 47 uf/16 v tan capacitors with esr=0.013 ohm max at 100 khz, & simulated source impedance of 1000 nh, 5 hz to 20 mhz. i 2 t inrush current transient - 0.04 a 2 s 0.08 a 2 s turn-on voltage threshold - 8.2 v turn-off voltage threshold - 7.9 v note : all specifications are typical at 25 c unless otherwise stated. output specifications parameter min typ max notes output voltage set point -2% vo,set - 2% vo,set vin=12 v, full load load regulation - 0.1% vo,set - line regulation - 0.1% vo,set - regulation over temperature (-40 c to +85 c) - 0.3% vo,set - tref=tamin to tamax output current 0 a - 10 a current limit threshold - 200% io - short circuit surge transient - 1 a 2 s 3 a 2 s ripple and noise (pk-pk) - 50 mv 100 mv ripple and noise (rms) - 20 mv 40 mv tested with 0-20 mhz, with 10 uf tantalum capacitor & 1 uf ceramic ca p acitor turn on time - 6 ms 10 ms overshoot at turn on - - 1% vo,set output capacitance - - 5000 uf transient response 50% ~ 100% max load - 100 mv - settling time - 50 us - 100% ~ 50% max load - 100 mv - settling time v o = 0.75 v - 5 v - 50 us - di/dt=2.5 a/us; vin=12 v; and with 2 150 uf polymer capacitors at the output note : all specifications are typical at nominal input, full load at 25 c unless otherwise stated.
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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output general specifications parameter min typ max notes efficiency vo=5.0 v vo=3.3 v vo=2.5 v vo=1.8 v vo=1.5 v vo=1.2 v vo=0.75 v - - - - - - - 95% 93% 92% 90% 89% 87.5% 81% - - - - - - - measured at vin=12 v, full load switching frequency 265 khz 300 khz 335 khz over temperature shutdown 1 - 130 c - output voltage trim range 0.7525 v - 5.0 v remote sense compensation - - 0.5 v mtbf 4,982,651 hours calculated per bell core sr-332 (i o = 80% load; vo=5 v; vin=12 v; t a = 25 c) dimensions inches (l w h) millimeters ( l w h ) 1.3 x 0.53 x 0.315 33.02 x 13.46 x 8.00 weight - 8 g - notes : all specifications are typical at 25 c unless otherwise stated. 1. the tref temperature measurement location: control specifications parameter min typ max notes remote on/off signal low (unit off) -0.2 v - 0.3 v signal high (unit on) - - vin, max srbc-10a2a0; remote on/off pin open, unit on. signal low (unit on) -0.2 v - 0.3 v signal high (unit off) 2.5 v - vin, max srbc-10a2al; remote on/off pin open, unit on. voltage sequencing sequencing delay time 10 ms - - delay from vin, min to application of voltage on seq pin sequencing slew rate capability - - 2 v/ms tracking accuracy power-up power-down - - 100 mv 300 mv 200 mv 500 mv vinmin to vinmax; iomin to iomax; vseq 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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output output trim equations equation for calculating the trim resistor (in ? ) given the desired adjusted voltage (vadj) is shown below. the trim up resistor should be connected between the trim pin and ground. 1000 7525 . 0 10500 ? ? = adj trimup v r equation for calculating the trim voltage (in v) given the desired adjusted voltage (vadj) is shown below. the trim up voltage should be connected between the trim pin and ground. ) 7525 . 0 ( 0667 . 0 7 . 0 ? ? = adj trimup v v thermal derating curves vo=0.75 v vo=1.8 v vo=3.3 v vo=5.0 v rtrim module vout gnd sense trim vtrim module vout gnd sense trim
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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output efficiency data module 5.0v 80.0% 90.0% 100.0% 1a 2.5a 5a 7.5a 10a output current efficiency 8.3v 12.0v 13.2v module 3.3v 80.0% 90.0% 100.0% 1a 2.5a 5a 7.5a 10a output current efficiency 8.3v 12.0v 14.0v module 2.5v 80.0% 90.0% 100.0% 1a 2.5a 5a 7.5a 10a output current efficiency 8.3v 12.0v 14.0v module 1.8v 70.0% 80.0% 90.0% 100.0% 1a 2.5a 5a 7.5a 10a output current efficiency 8.3v 12.0v 14.0v module 1.5v 70.0% 80.0% 90.0% 100.0% 1a 2.5a 5a 7.5a 10a output current efficiency 8.3v 12.0v 14.0v module 1.2v 50.0% 70.0% 90.0% 1a 2.5a 5a 7.5a 10a output current efficiency 8.3v 12.0v 14.0v module 0.75v 50.0% 60.0% 70.0% 80.0% 90.0% 1a 2.5a 5a 7.5a 10a output current efficiency 8.3v 12.0v 14.0v
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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output ripple and noise waveforms ripple and noise at max load 0.75 vdc output ripple and noise at max load 1.2 vdc output ripple and noise at max load 1.5 vdc output ripple and noise at max load 1.8 vdc output ripple and noise at max load 2.5 vdc output ripple and noise at max load 3.3 vdc output .
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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output ripple and noise waveforms (continued) ripple and noise at max load 5.0 vdc output note: ripple and noise at 12 v input, with 10 uf tantalum capacitor and 1 uf ceramic capacitor at the output, and ta=25 deg c. transient response waveforms transients 50% to 100% load 0.75 vdc output transients 100% to 50% load 0.75 vdc output
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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output transient response waveforms (continued) transients 50% to 100% load 1.2 vdc output transients 100% to 50% load 1.2 vdc output transients 50% to 100% load 1.5 vdc output transients 100% to 50% load 1.5 vdc output transients 50% to 100% load 1.8 vdc output transients 100% to 50% load 1.8 vdc output
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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output transient response waveforms (continued) transients 50% to 100% load 1.5 vdc output transients 100% to 50% load 2.5 vdc output transients 50% to 100% load 3.3 vdc output transients 100% to 50% load 3.3 vdc output transients 50% to 100% load 5.0 vdc output transients 100% to 50% load 5.0 vdc output note: transient response at 12 v input, di/dt=2.5 a/us, with external 2 x 150 uf polymer capacitor at the output, ta=25 deg c.
? 2007 bel fuse inc. specifications subject to change without notice. 011607 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 8.3 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/10 a output mechanical outline rohs compliance complies with the european directive 2002/95/ec , calling for the elimin ation of lead and other hazardous substances from electronic products. pin connections pin function 1 remote on/off 2 vin+ 3 seq 4 ground 5 vout+ 6 trim 7 remote sense recommended pad layout pad size: min: 0.14"* 0.095" (3.56mm * 2.41mm) max: 0.165"* 0.11" (4.19mm * 2.79mm) bottom view
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