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 5.0 vdc input 1.2 vdc - 3.3 vdc/15 a output ? non-isolated ? wide trim range ? fixed frequency (300 khz) ? under-voltage lockout (uvlo) ? remote on/off ? ocp/scp ? low cost ? converter can sink and source ? power good output signal (open collector) current description the bel vrpf-15b1ac is part of the low cost non-isolated dc/dc converter series. the modules use a sip package for ease of layout and space savings. the output is closely regulated and can be trimmed from 1.2 vdc to 3.3 vdc. the efficiency is typically 93% at 3.3 vdc output at full load. typical features include remote on/off, under-voltage lockout, over-current protection and short circuit protection. part selection output voltage input voltage max. output current max. output power typical efficiency model number 1.2 vdc - 3.3 vdc 5 vdc 15 a 49.5 w 93% vrpf-15b1ac notes: 1. all part numbers above indicate rohs 6. change the second letter "r" to "7" for rohs 5 part numbers. 2. add ?0? suffix at the end of the model number to indicate ?tube packaging?, and ?g? for ?tray packaging?. absolute maximum ratings parameter min typ max notes input voltage (continuous) -0.3 v - 7 v output enable terminal voltage -0.3 v - 7 v ambient temperature 0 c - 80 c storage temperature -40 c - 125 c input specifications parameter min typ max notes input voltage 4.5 v 5 v 5.5 v input current (source) vo=3.3 v vo=1.8 v vo=1.2 v - - - 11.7 a 6.8 a 4.8 a 12.5 a 7.4 a 5.2 a input current (sink) vo=3.3 v vo=1.8 v vo=1.2 v - - - -10 a -5 a -3 a -7.8 a -3.8 a -2.3 a no load input current - 35 ma - remote off input current - 10 ma 22 ma input reflected ripple current (pk-pk) - 90 ma 150 ma input reflected ripple current (rms) - 20 ma 40 ma tested with simulated source impedance of 500 nh, 5 hz to 20 mhz and five 10 uf/10 v capacitors (p/n: c3216x5r1a106k, tdk) at the input i 2 t inrush current transient - 0.02 a 2 s 0.05 a 2 s turn-on voltage threshold - 4.25 v - turn-off voltage threshold - 4 v - note : all specifications are typical at 25 c unless otherwise stated. v rpf-15b1ac 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 5.0 vdc input 1.2 vdc - 3.3 vdc/15 a output output specifications parameter min typ max notes output voltage set point v o =3.3 v v o =1.8 v v o =1.2 v 3.234 v 1.764 v 1.176 v 3.3 v 1.8 v 1.2 v 3.366 v 1.836 v 1.224 v test condition: vin=5 v, lout=50% full load load regulation v o =3.3 v v o =1.8 v v o =1.2 v - - - 5 mv 3 mv 2 mv 8 mv 5 mv 4 mv line regulation v o =3.3 v v o =1.8 v v o =1.2 v - - - 2 mv 1 mv 1 mv 5 mv 3 mv 2 mv line/load regulation is the deviation from nominal to minimum and maximum line/load. regulation over temperature (0 c to +80 c) v o =3.3 v v o =1.8 v v o =1.2 v - - - 13 mv 9 mv 8 mv 28 mv 18 mv 15 mv output ripple and noise (pk-pk) - 30 mv 50 mv output ripple and noise (rms) - 5 mv 15 mv tested at 0-20 mhz bw with 1000 uf electrolytic capacitor & five 10 uf/10 v tdk c3216x5r1a106k capacitors and 0.1 uf ceramic capacitor at the output output current -15 a - 15 a current limit threshold 19 a - 35 a short circuit surge transient - 0.5 a 2 s 1 a 2 s turn on time - 10 ms 20 ms overshoot at turn on - 0% 3% output capacitance v o =3.3 v v o =1.8 v v o =1.2 v - - - - - - 13200 uf 16400 uf 17600 uf transient response 50% ~ 100% max load - 35 mv 50 mv settling time - 50 us 100 us 100% ~ 50% max load - 35 mv 50 mv settling time v o =1.2 v- 3.3 v - 50 us 100 us test conditions: di/dt = 0.1 a/us; vin = 5 v; with 1000 uf electrolytic capacitor and five 10 uf/10 v tdk c3216x5r1a106k ceramic 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 5.0 vdc input 1.2 vdc - 3.3 vdc/15 a output general specifications parameter min typ max notes efficiency (current source) v o =3.3 v v o =1.8 v v o =1.2 v 89% 83% 80% 93% 87% 82% - - - efficiency (current sink) v o =3.3 v v o =1.8 v v o =1.2 v 86% 79% 72% 90% 83% 75% - - - measured at vin=5 v, full load. switching frequency 275 khz 300 khz 325 khz output voltage trim range 1.2 v - 3.3 v mtbf 4,573,743 hours calculated per bell core sr-332 (vin=5.0 v, i o =12 a; t a = 25 c) dimensions inches (l w h) millimeters ( l w h ) 1.2 x 1.0 x 0.457 30.48 x 25.4 x 11.6 weight - 13 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 - 0.8 v signal high (unit on) 2.4 v - 7 v power good delay 1 - - 10 ms signal low 2 - 0.3 v - current sink - 5 ma - notes : all specifications are typical at 25 c unless otherwise stated. 1. power good delay time is the time from output voltage in full regulation to power good asserted. 2. the power good signal is an open collector output. when the output of the module is higher than 90% of the nominal set point, the power good pin is high. output trim equation equation for calculating the trim resistor (in k ? ) given the desired adjusted voltage (vadj) is shown below. the rtrim resistor should be connected between the trim pin and ground. power good signal level set equation for calculating the power good threshold (in k ? ) given the desired adjusted voltage (vadj) is shown below. the rset resistor should be connected between the pg_set pin (pin 9) and ground. 992 . 0 18 . 1 992 . 0 62 . 5 992 . 0 + ? ? ? ? ? ? ? + = k rtrim k vadj rtrim module vout gnd trim 24 . 1 10 86 . 18 21 . 2 24 . 1 19 . 6 _ 6 + ? ? ? ? ? ? ? ? + = ? rset k k threshold pg
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 5.0 vdc input 1.2 vdc - 3.3 vdc/15 a output efficiency data 92.0% 92.5% 93.0% 93.5% 94.0% 94.5% 95.0% 95.5% 96.0% 96.5% 97.0% 1.5 3.75 7.5 11.25 15.0 4.5 v 5.0 v 5.5 v vo=3.3 v 85.0% 86.0% 87.0% 88.0% 89.0% 90.0% 91.0% 92.0% 93.0% 94.0% 95.0% 1.5 3.75 7.5 11.25 15.0 4.5 v 5.0 v 5.5 v vo=1.8 v 80.0% 82.0% 84.0% 86.0% 88.0% 90.0% 92.0% 1.5 3.75 7.5 11.25 15.0 4.5 v 5.0 v 5.5 v vo=1.2 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 5.0 vdc input 1.2 vdc - 3.3 vdc/15 a output thermal derating curves vo=3.3 v vo=1.8 v vo=1.2 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 5.0 vdc input 1.2 vdc - 3.3 vdc/15 a output ripple and noise waveforms vout=1.2 v vout=1.8 v vout=3.3 v note: ripple and noise at max load input=5.0 v, 0-20 mhz bw, with external 5x10 uf/10 v and 0.1 uf/25 v ceramic capacitor, 1000uf electrolytic capacitor 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 5.0 vdc input 1.2 vdc - 3.3 vdc/15 a output transient response waveforms transients 50% to 75% load, 1.2 vdc output transients 75% to 50% load, 1.2 vdc output transients 50% to 75% load, 1.8 vdc output transients 75% to 50% load, 1.8 vdc output transients 50% to 75% load, 3.3 vdc output transients 75% to 50% load, 3.3 vdc output note: transient response at vin=5 vdc, with external load capacitor 5 x10 uf/10 v and 0.1 uf/25 v ceramic capacitor and an 1000 uf electrolytic capacitor at the output, and ta=25 deg c.
? 2007 bel fuse inc. specifications subject to change without notice. 012907 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 5.0 vdc input 1.2 vdc - 3.3 vdc/15 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 vo+ 2 vo+ 3 vo+ 4 trim 5 remote on/off 6 power good 7 ground 8 ground 9 pg_set 10 vin+ 11 vin+
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