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 4.5v-14v input 0.8v-5.5v/8a output ? non-isolated ? remote on/off ? fixed frequency ? under-voltage lockout (uvlo) ? high efficiency ? ocp/scp ? high power density ? wide trim range ? low cost description the bel X7AH-08E1a0 modules are a series of non-is olated, step down dc/dc conver ters that operate from 4.5v to14v source. these converters are available in a range of output voltages from 0.8v to 5.5v. it is packaged in a compact, overmolded package rated at 8a . optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. the output is closely regulated and the efficiency for 5v output is typically 93% at full load. part selection output voltage input voltage max. output current max. output power typical efficiency part number surface mount part number vertical mount 0.8v - 3.63v 4.5v ? 14v 8a 26.4w 91% s7ah-08e1a0 v7ah-08e1a0 4.5v ? 5.5v 8v ? 14v 8a 44w 93% s7ah-08e500 v7ah-08e500 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 - 15v output enable terminal voltage -0.3v - 14v ambient temperature -40 c - 85 c storage temperature -55 c - 125 c input specifications parameter min typ max notes input voltage vo=4.5v-5.5v vo=0.9v-3.63v 8.0v 4.5v - - 14v 14v input current (full load) vo=5.0v v o =3.3v v o =2.5v v o =1.8v v o =1.5v v o =1.2v v o =0.9v - - - - - - - - - - - - - - 5.4a 6.7a 5.3a 3.2a 3.0a 2.8a 2.0a input current (no load) - - 100ma remote off input current - 3ma 10ma input reflected ripple current (pk-pk) - 180ma - input reflected ripple current (rms) - 50ma - with simulated source impedance of 500nh, 5hz to 20mhz; use two 47uf/16v low esr tantalum ca p acito r s. X7AH-08E series preliminary
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 4.5v-14v input 0.8v-5.5v/8a output input specifications (continued) parameter min typ max notes i 2 t inrush current transient - 0.04a 2 s - - 4.3v - X7AH-08E1a0 turn-on voltage threshold - 7.5v - X7AH-08E500 - 4.0v - X7AH-08E1a0 turn-off voltage threshold - 7.2v - X7AH-08E500 output specifications parameter min typ max notes output voltage set point vo=5.0v v o =3.3v v o =2.5v v o =1.8v v o =1.5v v o =1.2v v o =0.9v 4.900v 3.234v 2.450v 1.764v 1.470v 1.176v 0.882v 5.0v 3.3v 2.5v 1.8v 1.5v 1.2v 0.9v 5.100v 3.366v 2.550v 1.836v 1.530v 1.224v 0.918v test condition: vin=12v, lout=50% full load line regulation vo=5.0v v o =3.3v v o =2.5v v o =1.8v v o =1.5v v o =1.2v v o =0.9v - - - - - - - 15mv 10mv 8mv 5mv 5mv 4mv 4mv 25mv 16.5mv 12.6mv 9mv 9mv 8mv 8mv load regulation vo=5.0v v o =3.3v v o =2.5v v o =1.8v v o =1.5v v o =1.2v v o =0.9v - - - - - - - 15mv 10mv 8mv 5mv 5mv 4mv 4mv 25mv 16.5mv 12.5mv 9mv 9mv 8mv 8mv regulation over temperature (-40 c to 85 c) - 30mv 50mv output current 0a - 8a current limit threshold 10a - 20a short circuit surge transient - tbd - ripple and noise (rms) - 15mv 30mv ripple and noise (pk-pk) - 50mv 80mv bw = 0-20mhz; with a 1uf ceramic capacitor and a 10uf/10v tantalum capacitor at the output. turn on time - 8ms 20ms overshoot at turn on - 0% 3% output capacitance 0uf - 3200uf transient response overshoot - 120mv 180mv 50% ~ 100% max load settling time - 50us 80us overshoot - 120mv 180mv 100% ~ 50% max load settling time all - 50us 80us di/dt = 0.5a/us; vin = 12v; with a 1uf ceramic capacitor and a 10uf/10v tantalum capacitor at the out p ut. note: all specifications are typical at 12v 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 4.5v-14v input 0.8v-5.5v/8a output general specifications parameter min typ max notes efficiency vo=5.0v v o =3.3v v o =2.5v v o =1.8v v o =1.5v v o =1.2v v o =0.9v 89% 87% 86% 84% 82% 81% 76% 93% 91% 90% 88% 86% 85% 80% - - - - - - - measured at vin=12v, full load switching frequency - 330khz - 90%v o - 403%v o X7AH-08E1a0 1 output trim range 90%v o - 110%v o X7AH-08E500 2 remote sense compen sation - - 0.2v mtbf tbd calculated per bell core tr-332 (i o = nominal; t a = 25 c) dimensions (surface mount) inches (l w h) millimeters ( l w h ) 0.78 x 0.7 x 0.32 19.81 x 17.78 x 8.13 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 - 6g - notes : all specifications are typical at 25 c unless otherwise stated. 1. the output voltage is 0.9v at trim pin is open. 2. the output voltage is 5.0v at trim pin is open. control specifications parameter min typ max notes remote on/off signal low (unit off) -0.3v - 0.8v signal high (unit on) 2.4v - 14v remote on/off pi n open, unit on.
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 4.5v-14v input 0.8v-5.5v/8a output output trim equations 1) X7AH-08E1a0 equations for calculating the trim resistor (in k ? ) given the desired adjusted voltage (vadj) and the nominal output voltage of the converter (vnom) 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. 631 . 5 076 . 1 ? ? = ? adj o down trim v v r 261 . 0 759 . 3 ? ? = ? o adj up trim v v r note: output voltage vo=0.9v when rtrim_up is not connected. 2) X7AH-08E500 equations for calculating the trim resistor (in k ? ) given the desired adjusted voltage (vadj) and the nominal output voltage of the converter (vnom) 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. 631 . 5 099 . 23 ? ? = ? adj o down trim v v r 261 . 0 759 . 3 ? ? = ? o adj up trim v v r note: output voltage vo=5v when rtrim_up is not connected. vout trim gnd rtrim-dow n module vout tr im gnd rtrim- u p module vout trim gnd rtrim-dow n module vout tr im gnd rtrim- u p module
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 4.5v-14v input 0.8v-5.5v/8a output efficiency data module 3.3v 75.0% 80.0% 85.0% 90.0% 95.0% 100.0% 0.82468 output current(a) efficiency 4.5v 8.0v 12.0v 14.0 v module 2.5v 65.0% 75.0% 85.0% 95.0% 105.0% 0.82468 output current(a) efficiency 4.5v 8.0v 12.0v 14.0 v module 1.8v 65.0% 75.0% 85.0% 95.0% 105.0% 0.8 2 4 6 8 output current(a) efficiency 4.5v 8.0v 12.0v 14.0 v module 1.5v 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 0.8 2 4 6 8 output current(a) efficiency 4.5v 8.0v 12.0v 14.0v module 1.2v 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 0.8 2 4 6 8 output current(a) efficiency 4.5v 8.0v 12.0v 14.0v module 0.9v 60.0% 70.0% 80.0% 90.0% 100.0% 0.82468 output current(a) efficiency 4.5v 8.0v 12.0v 14.0 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 4.5v-14v input 0.8v-5.5v/8a output thermal derating curves vo=0.9v vo=1.8v vo=3.3v
? 2005 bel fuse inc. specifications subject to change without notice. 030405 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 4.5v-14v input 0.8v-5.5v/8a output s7ah-08e v7ah-08e pin connections pin function 1 remote on/off (option) 2 vin 3 ground 4 vout 5 trim (option) 6 remote sense (option) 7 n/a pin connections pin function 1 remote on/off (option) 2 vin 3 ground 4 vout 5 trim (option) bel bel bel
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