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 5v input vref/2 / 5a output ? non-isolated ? remote on/off ? fixed frequency (300khz) ? ocp/scp ? under-voltage lockout (uvlo) ? low profile package (7.82mm) description the bel x7ah-05bt50 is part of the low cost non-isolated dc/dc converter series. the converter is designed specifically to provide bus termination voltage in application such as ddr (double data rate) memory where the bus termination voltage must closely track the i/o bus voltage. the converter accepts a reference input and programs its output voltage to 50% of the reference. the modules use a smd or vertical mount package for ease of layout and space savings. part selection output voltage input voltage max. output current max. output power typical efficiency part number surface mount part number vertical mount vref/2 5v 5a 6.25w 82% S7AH-05BT50 v7ah-05bt50 note: add ?0? suffix at the end of the model number to indicate ?tube packaging?, and ?r? for ?reel packaging?, and ?g? for ?tray packaging?. absolute maximum ratings parameter min typ max notes input voltage (continuous) -0.3v - 6v output enable terminal voltage -0.3v - 6v ambient temperature -40 c - 85 c storage temperature -55 c - 125 c input specifications parameter min typ max notes input voltage 4.5v 5.0v 5.5v input current - - 2a input current (no load) - - 60ma remote off input current - 9ma 15ma input reflected ripple current (rms) - 30ma 50ma input reflected ripple current (pk-pk) - 110ma 140ma measured with simulated source impedance of 500nh, 5hz to 20mhz; & one 270uf/16v capacitor with esr = 0.018 ohm max. at 100khz i 2 t inrush current transient - 0.02a 2 s 0.05a 2 s turn-on voltage threshold 4.19v 4.3v 4.5v turn off voltage threshold - 3.8v 4.49v notes: 1. all tests are measured at vref = 2.5v. 2. all specifications are typical at 25 c unless otherwise stated. x7ah-05bt50
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 5v input vref/2 / 5a output output specifications parameter min typ max notes output voltage set point 0.99* (vref/2) v vref/2 1.01* (vref/2) v vin=5v, iout=full load. load regulation - 3mv 6mv line regulation - 1mv 3mv regulation over temperature (-40 c to +85 c) - 15mv 20mv output current 0a - 5a output current threshold 6.5a - 12.5a short circuit surge transient - 0.04a 2 s 0.08a 2 s ripple and noise (rms) - 12mv 20mv ripple and noise (pk-pk) - 45mv 90mv tested at: 0-20mhz bw; with 1uf ceramic ca p acito r at the out p ut turn on time - 12ms 20ms overshoot at turn on - 0% 5% output capacitance - - 2200uf notes: 1. all specifications are typical at nominal input, full load at 25 c unless otherwise stated. 2. the modules track the transient response of the reference input. see the figure in tr data on page 3. 3. the turn-off undershoot of the module is below 100mv if a 220uf aluminum cap is added at the output. 4. all tests are measured at vref=2.5v. general specifications parameter min typ max notes efficiency 79% 82% - measured at vin=5v, full load switching frequency 250khz 300khz 340khz mtbf 8,841,119 hours calculated per bell core tr-332 (i o =4a, vin=5v, vref=2.5v; t a = 25 c) dimensions (surface mount) inches (l w h) millimeters ( l w h ) 0.78 x 0.7 x 0.32 19.812 x 17.78 x 8.128 dimensions (vertical) inches (l w h) millimeters ( l w h ) 0.7 x 0.308 x 0.65 17.78 x 7.82 x 16.51 weight - 4.7g - note : all specifications are typical at nominal input, full load at 25 c unless otherwise stated. all tests are measured at vref=2.5v control specifications parameter min typ max notes remote on/off -0.3v - 1.35v (vin=4.5v) signal low (unit off) -0.3v - 1.65v (vin=5.5v) 3.15 v(vin=4.5v) - 5.5v signal high (unit on) 3.85 v(vin=5.5v) - 5.5v remote on/off pin open, unit on note: all tests are measured at vref=2.5v.
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 5v input vref/2 / 5a output transient response: track the transient response of the reference input. no external load capacitance. channel 1: transient response tracking. channel 2: transient response of the reference input. ta = 25 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 5v input vref/2 / 5a output efficiency data 79.0% 80.0% 81.0% 82.0% 83.0% 84.0% 85.0% 86.0% 87.0% 12345 4.5v 5.0v 5.5v efficiency is tested at vref=2.5v. thermal derating curves v7ah-05bt50 S7AH-05BT50 test condition : derating curves are tested at nominal input voltage and vref=2.5v.
? 2003 bel fuse inc. specifications subject to change without notice. 112504 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 5v input vref/2 / 5a output S7AH-05BT50 v7ah-05bt50 pin connections pin function 1 remote on/off (option) 2 vin 3 ground 4 vout 5 vref 6 n/a 7 n/a pin connections pin function 1 remote on/off (option) 2 vin 3 ground 4 vout 5 vref bel bel bel
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