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 4.5 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/3 a output ? non-isolated ? ocp/scp ? fixed frequency ? remote on/off ? high efficiency ? wide trim range ? high power density ? wide input range ? under-voltage lockout (uvlo) ? active low/high (option) description the bel VRBA-03E1Ax modules are a series of non-isolated dc/dc converters that deliver up to 3 a of output current with full load efficiency of 93% at 5.0 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. their open- frame construction and small footprint enable designers to develop cost and space-efficient solutions. standard features include remote on/off, programmable output voltage and over current protection. part selection output voltage input voltage max. output current max. output power typical efficiency at 5.0v model number active high model number active low 0.75 v - 5 v 1 4.5 v - 14 v 3 a 15 w 93% VRBA-03E1A0 VRBA-03E1Al notes : 1. these modules use a buck topology, so the output voltages must be 0.5 v less than the input voltage. 2. add ?g? to the end of the model number to indicate tray packaging. 3. 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 ambient temperature -40 c - 85 c storage temperature -55 c - 125 c note : all specifications are typical at 25 c unless otherwise stated. input specifications parameter min typ max notes input voltage vo set=5 v vo set 3.3 v 7.0 v 4.5 v 12 v 12 v 14 v 14 v input current (full load) vo=5.0 v vo=3.3 v vo=0.75 v - - - 1.35 a 1.00 a 0.25 a 3.70 a 2.50 a 0.65 a input current (no load) vo=5.0 v vo=3.3 v vo=0.75 v - - - 65 ma 50 ma 15 ma 80 ma 60 ma 20 ma remote off input current - 3 ma 6 ma input reflected ripple current (pk-pk) vo=5.0 v vo=3.3 v vo=0.75 v - - - 150 ma 100 ma 35 ma 200 ma 150 ma 60 ma tested with simulated source impedance of 1 uh, 5 hz to 20 mhz and two 100 uf/25 v external input tantalum capacitors. v rba-03e1ax 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 4.5 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/3 a output input specifications (continued) parameter min typ max notes input reflected ripple current (rms) vo=5.0 v vo=3.3 v vo=0.75 v - - - 50 ma 30 ma 12 ma 70 ma 50 ma 20 ma tested with simulated source impedance of 1 uh, 5 hz to 20 mhz and two 100 uf/25 v external input tantalum capacitors. i 2 t inrush current transient - 0.01 a 2 s0.02 a 2 s turn-on voltage threshold vo set=5 v vo set 3.3 v - - 5.5 v 4.3 v 6.5 v 4.5 v turn-off voltage threshold vo set=5 v vo set 3.3 v 3.8 v 3.8 v 5.5 v 4.0 v 6.0 v 4.3 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, lo=lomax, output voltage set point -3.5%vo,set - 2.5%vo,set over all operating input voltage, resistive load, and temperature conditions load regulation 0.4%vo,set 0.3%vo,set 0.4%vo,set lo=lomin to lomax line regulation 0.5%vo,set 0.3%vo,s et 0.5%vo,set vin=vinmin to vinmax regulation over temperature - 0.5%vo,set - -40 c to +85 c output current 0 a - 3 a current limit threshold 5 a - 9.5 a short circuit surge transient - 0.1 a 2 s 0.2 a 2 s ripple and noise (pk-pk) vo=5.0 v vo=3.3 v vo=0.75 v - - - 130 mv 100 mv 35 mv 150 mv 120 mv 45 mv ripple and noise (rms) vo=5.0 v vo=3.3 v vo=0.75 v - - - 40 mv 30 mv 10 mv 50 mv 40 mv 20 mv test conditions: 0-20 mhz bw, with external 10 uf/ 10 v tantalum capacitor and 1 uf/ 10 v ceramic capacitor at the output. ripple and noise (pk-pk) vo=5.0 v vo=3.3 v vo=0.75 v - - - 70 mv 55 mv 20 mv 85 mv 70 mv 30 mv ripple and noise (rms) vo=5.0 v vo=3.3 v vo=0.75 v - - - 20 mv 15 mv 5 mv 30 mv 25 mv 10 mv test conditions: 0-20 mhz bw, with external 10 uf/ 10 v tantalum capacitor 1 uf/10 v ceramic capacitor and two 22 uf/10 v ceramic capacitors at the output. turn on time - 8 ms 12 ms overshoot at turn on - 0% 3% output capacitance 0 uf - 1200 uf transient response 50% ~ 100% max load - 200 mv 300 mv settling time - 20 us 50 us 100% ~ 50% max load - 200 mv 300 mv settling time all - 20 us 50 us test conditions: di/dt = 2.5 a/us, vin=12 v, and with external 10 uf/ 10 v tantalum capacitor and 1 uf/ 10 v ceramic capacitor at the output. note : all specifications are typical at nomin al input (vin=12 v), 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 4.5 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/3 a output general specifications parameter min typ max notes efficiency vo=5.0 v vo=3.3 v vo=0.75 v 90% 88% 77% 93% 91% 80% - - - measured at vin=12 v, full load switching frequency 200 khz 230 khz 250 khz output voltage trim range (wide trim) 0.7525 v - 5 v mtbf 7,900,000 hours calculated per bell core sr-332 (i o = 80% load; t a = 25 c) dimensions (vertical mount) inches (l w h) millimeters ( l w h ) 1.0 x 0.5 x 0.27 25.41 x 12.7 x 6.85 weight - 2.5 g - note : all specifications are typical at 25 c unless otherwise stated. control specifications parameter min typ max notes remote on/off signal low (unit off) -0.3 v - 0.4 v signal high (unit on) 2.5 v - 14 v signal low (unit on) -0.3 v - 0.4 v signal high (unit off) 2.5 v - 14 v remote on/off pin open, unit on. output trim equations equation for calculating the trim resistor (in k ? ) given the desired adjusted voltage (vadj) is shown below. the trim up resistor should be connected between the trim pin and ground. 1 7525 . 0 507 . 10 ? ? = adj trim 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 trim v v rtrim module vo ut gnd trim vtrim module vout gnd 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 4.5 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/3 a output efficiency data module 5.0v 60.0% 70.0% 80.0% 90.0% 100.0% 0.30a 0.75a 1.50a 2.25a 3.00a output current efficienc y 7.0v 12.0v 14.0v module 3.3v 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 0.30a 0.75a 1.50a 2.25a 3.00a output current efficienc y 4.5v 12.0v 14.0v module 0.75v 50.0% 60.0% 70.0% 80.0% 90.0% 0.30a 1.75a 1.50a 2.25a 3.00a output current efficienc y 4.5v 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 4.5 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/3 a output thermal derating curves vin=12 v, vo=5.0 v vin=12 v, vo=3.3 v vin=12 v, vo=0.75 v
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 4.5 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/3 a output ripple and noise waveforms 12 vdc input, 0.75 vdc output 12 vdc input, 3.3 vdc output 12 vdc input, 5.0 vdc output note: ripple and noise at full load, 0-20 mhz bw, with 10 uf/10 v tantalum cap and 1 uf/10 v ceramic cap at the output, and ta=25 deg c.
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 4.5 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/3 a output transient response waveforms transients 50% to 100% load 0.75 vdc output transients 100% to 50% load 0.75 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 vdc input, di/dt=2.5 a/us, with 10 uf/10 v tantalum cap and 1 uf/10 v ceramic cap at the output, ta=25 deg c.
? 2007 bel fuse inc. specifications subject to change without notice. 011207 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 4.5 vdc - 14 vdc input 0.75 vdc - 5.0 vdc/3 a output mechanical outline rohs compliance complies with the european dire ctive 2002/95/ec, calling for th e elimination of lead and other hazardous substances from electronic products. pin connections pin function 1 vout 2 trim 3 ground 4 n/a 5 vin 6 remote on/off
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