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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output ? non-isolated ? remote on/off ? trim function ? ocp/scp ? low profile package (7.82 mm) ? ul60950-1 recognized (ul/cul) ? under-voltage lockout (uvlo) description the bel xrah-01h1a0 is part of the low cost non-isolated dc/dc converter series. the modules use a smd or vertical mount package for ease of layout and space savings. the output is widely trimmed from 1.2 vdc to 3.3 vdc. typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection. part selection output voltage input voltage max. output current max. output power typical efficiency part number surface mount part number vertical mount 1.2 v - 3.3 v 4.5 v - 32 v 1 a 3.3 w 86% srah-01h1a0 vrah-01h1a0 notes: 1. add ?0? suffix at the end of the model number to indicate ?tube packaging?, and ?r? for ?reel packaging?, and ?g? for ?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 - 34 v output enable terminal voltage -0.3 v - 12 v ambient temperature -40 c - 85 c storage temperature -40 c - 125 c input specifications parameter min typ max notes input voltage 4.5 v 20 v 32 v input current (no load) - 5 ma 8 ma input current (full load) v o =3.3 v v o =2.5 v v o =1.8 v v o =1.5 v v o =1.2 v - - - - - - - - - - 0.20 a 0.16 a 0.12 a 0.11 a 0.09 a remote off input current - 2 ma 5 ma input reflected ripple current (pk-pk) - 300 ma 420 ma input reflected ripple current (rms) - 100 ma 160 ma tested with simulated source impedance of 500 nh, 5 hz to 20 mhz and one 100 f/50 v electrolytic capacitor and a 3.3 uf/50 v ceramic capacitor at the input i 2 t inrush current transient - 0.02 a 2 s 0.1 a 2 s turn on voltage threshold - 4.1 v 4.5 v turn off voltage threshold - 3.3 v 4.0 v note: all specifications are typical at 25 c unless otherwise stated . xrah-01h1a0 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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output output specifications parameter min typ max notes output voltage set point v o =3.3 v v o =2.5 v v o =1.8 v v o =1.5 v v o =1.2 v 3.234 v 2.450 v 1.764 v 1.470 v 1.176 v 3.3 v 2.5 v 1.8 v 1.5 v 1.2 v 3.366 v 2.550 v 1.836 v 1.530 v 1.224 v test conditions: vin=20 v, io=50% full load line regulation v o =3.3 v v o =2.5 v v o =1.8 v v o =1.5 v v o =1.2 v - - - - - 3 mv 2 mv 2 mv 1 mv 1 mv 6 mv 5 mv 4 mv 3 mv 2 mv load regulation v o =3.3 v v o =2.5 v v o =1.8 v v o =1.5 v v o =1.2 v - - - - - 3 mv 2 mv 2 mv 1 mv 1 mv 6 mv 5 mv 4 mv 3 mv 2 mv regulation over temperature (-40 c to +85 c) - 10 mv 20 mv output current 0 a - 1 a current limit threshold 2 a - 3 a short circuit surge transient - 0.02 a 2 s 0.1 a 2 s ripple and noise (rms) - 6 mv 10 mv ripple and noise (pk-pk) - 60 mv 100 mv test condition: 0-20 mhz bw turn on time - 6 ms 30 ms overshoot at turn on - 2% 5% output capacitance 0 uf - 400uf transient response overshoot - 80 mv 120 mv 50% ~ 100% max load settling time - 150 us 200 us overshoot - 80 mv 120 mv 100% ~ 50% max load settling time v o =3.3 v - 150 us 200 us overshoot - 70 mv 110 mv 50% ~ 100% max load settling time - 120 us 160 us overshoot - 70 mv 110 mv 100% ~ 50% max load settling time v o =2.5 v - 120 us 160 us overshoot - 60 mv 100 mv 50% ~ 100% max load settling time - 100 us 130 us overshoot - 60 mv 100 mv 100% ~ 50% max load settling time v o =1.8 v - 100 us 130 us overshoot - 60 mv 100 mv 50% ~ 100% max load settling time - 100 us 130 us overshoot - 60 mv 100 mv 100% ~ 50% max load settling time v o =1.5 v - 100 us 130 us overshoot - 60 mv 100 mv 50% ~ 100% max load settling time - 100 us 130 us overshoot - 60 mv 100 mv 100% ~ 50% max load settling time v o =1.2 v - 100 us 130 us test conditions: di/dt = 0.5 a/us; vin = 20 v note: all specifications are typical at 20 v 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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output general specifications parameter min typ max notes efficiency v o =3.3 v v o =2.5 v v o =1.8 v v o =1.5 v v o =1.2 v 83% 80% 76% 73% 70% 86% 83% 79% 76% 73% - - - - - measured at vin=20 v, full load. switching frequency v o =3.3 v v o =2.5 v v o =1.8 v v o =1.5 v v o =1.2 v 270 khz 190 khz 150 khz 130 khz 100 khz 290 khz 220 khz 170 khz 150 khz 120 khz 310 khz 250 khz 190 khz 170 khz 140 khz output trim range 1.2 v - 3.3 v vo=1.2 v when trim pin open. mtbf 8,040,762 hours calculated per bell core sr-332 (i o =0.8 a, vin=20 v; t a = 25 c) dimensions (surface mount) inches (l w h) millimeters ( l w h ) 0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.13 dimensions (vertical) inches (l w h) millimeters ( l w h ) 0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51 weight - 5.1 g - note: all specifications are typical at 20v input, full load at 25 c unless otherwise stated. control specifications parameter min typ max notes remote on/off signal low (unit on) -0.3 v - 1 v signal high (unit off) 2.8 v - 12 v remote on/off pin open, unit on. output trim equations equations for calculating the trim resistor (in k ? ) given the desired adjusted voltage (vadj) and the nominal output voltage of the converter (vo) are shown below. the trim down resistor should be connected between the trim pin and vout. the trim up resistor should be connected between the trim pin and ground. only one of the resistors should be used for any given application. 5 . 21 7 . 8 ? ? = adj o trimdown v v r o adj trimup v v r ? = 2 . 17 note: output voltage vo=1.205 v module vout trim gnd rtrimdown module vout trim gnd rtrimup
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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output efficiency data efficiency curve 50.0% 55.0% 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 output current (a) efficiency 4.5 v 20 v 32 v efficiency curve 50.0% 55.0% 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 output current (a) efficiency 4.5 v 20 v 32 v vo = 3.3 v vo = 2.5 v efficiency curve 50.0% 55.0% 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 output current (a) efficiency 4.5 v 20 v 32 v efficiency curve 50.0% 55.0% 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 output current (a) efficiency 4.5 v 20 v 32 v vo = 1.8 v vo = 1.5 v efficiency curve 50.0% 55.0% 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 output current (a) efficiency 4.5 v 20 v 32 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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output thermal derating curve test condition : derating curve is tested at nominal input voltage.
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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output ripple and noise waveforms 20 vdc input, 3.3 vdc output 20 vdc input, 2.5 vdc output 20 vdc input, 1.8 vdc output 20 vdc input, 1.5 vdc output 20 vdc input, 1.2 vdc output note: ripple and noise at max load, 0-20mhz bw, 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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output transient response waveforms 50% to 100% load, 3.3 vdc output 100% to 50% load, 3.3 vdc output 50% to 100% load, 2.5 vdc output 100% to 50% load, 2.5 vdc output 50% to 100% load, 1.8 vdc output 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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output transient response waveforms (continued) 50% to 100% load, 1.5 vdc output 100% to 50% load, 1.5 vdc output 50% to 100% load, 1.2 vdc output 100% to 50% load, 1.2 vdc output note: transient response at 20 vdc input, di/dt=0.5 a/us, ta=25 deg c.
? 2007 bel fuse inc. specifications subject to change without notice. 010907 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 converter 4.5 vdc - 32 vdc input 1.2 vdc - 3.3 vdc/1 a output mechanical outline srah-01h1a0 vrah-01h1a0 rohs compliance complies with the european directive 2002/95/ec , calling for the elimin ation of lead and other hazardous substances from electronic products. these parts are not however compatible with the higher temperatures associated with lead free solder processes and must be soldered using a reflow profile with a peak temperature of no more than 240 oc. bel pin connections pin function 1 remote on/off (option) 2 vin 3 ground 4 vout 5 trim (option) 6 n/a 7 n/a pin connections pin function 1 remote on/off (option) 2 vin 3 ground 4 vout 5 trim (option) bel bel
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