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bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a nonisolated compact, low profile surface mount package fixed frequency high efficiency means less power dissipation excellent thermal performance optimized for cost remote on/off undervoltage lockout (uvlo) over current and short circuit protection remote sense description the bel s7db-12b modules are a series of non-isolated, step down dc/dc power converters that operate from a nominal 5v source. these converters are available in a range of output voltages from 1.2v to 3.3v. they are packaged in a compact, low profile, surface mount dip package for ease of layout and space savings. 12a maximum output is also provided. standard features include remote on/off, remote sense, over current and short circuit protection, uvlo and output voltage adjust. these products may be used almost anywhere low voltage silicon is employed and a 5v source is available. typical applica- tions include file servers, routers, line cards and other computing and communications equipment. applications page 1 s7db-12b series distributed power architectures data networking equipment telecommunications computers and peripherals part number selection t u p t u o e g a t l o v t u p n i e g a t l o v t u p t u o . x a m t n e r r u c t u p t u o . x a m r e w o p l a c i p y t y c n e i c i f f e r e b m u n t r a p v 3 . 3v 5a 2 1w 6 . 9 3% 2 90 3 3 b 2 1 - b d 7 s v 5 . 2v 5a 2 1w 0 . 0 3% 0 90 5 2 b 2 1 - b d 7 s v 8 . 1v 5a 2 1w 6 . 1 2% 6 80 8 1 b 2 1 - b d 7 s v 5 . 1v 5a 2 1w 0 . 8 1% 4 80 5 1 b 2 1 - b d 7 s v 2 . 1v 5a 2 1w 4 . 4 1% 2 80 2 1 b 2 1 - b d 7 s
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 2 input specifications absolute maximum ratings note: use beyond the maximum ratings may cause a reliability degradation of the dc/dc converter or may permanently damage the device. note: input capacitance two 270f/10v, esr = 0.018 ? max at 100khz @ 25 c. 1. with simulated source impedance of 500nh, 5hz to 20mhz. r e t e m a r a p l o b m y s n i m l a c i p y t x a m t i n u e g a t l o v t u p n i s u o u n i t n o cn i v3 . 0 - 6v e g a t l o v l a n i m r e t e l b a n e t u p t u on e t u o v3 . 0 - 6v e r u t a r e p m e t t n e i b m ab m a t0 4 - 5 8c e r u t a r e p m e t e g a r o t sr o t s t5 5 - 0 0 1c r e t e m a r a p e l u d o m l o b m y s n i m l a c i p y t x a m s t i n u e g a t l o v t u p n i g n i t a r e p ol l an i v5 . 455 . 5v t n e r r u c t u p n i v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 n i i 2 . 1 1 7 . 8 6 . 6 5 . 5 5 . 4 a t n e r r u c t u p n i d a o l o n l l a 0 5 a m t n e r r u c t u p n i f f o e t o m e r 0 10 2 a m t n e r r u c e l p p i r d e t c e l f e r t u p n i 1 l l a 0 40 8 a m s m r ) p - p ( t n e r r u c e l p p i r d e t c e l f e r t u p n i 1 l l a 0 4 10 8 2k p a m i 2 t n e i s n a r t t n e r r u c h s u r n i tl l a 1 . 02 . 0a 2 s d l o h s e r h t e g a t l o v n o n r u tl l a 3 . 45 . 4v d l o h s e r h t e g a t l o v f f o n r u tl l a 5 8 . 39 4 . 4v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 3 output specifications note: all specifications are typical at nominal input, full load at 25 c unless otherwise stated. 1. vin = 5v, iout = full load, ta = 25 c. 2. 0 - 20mhz, 1f ceramic cap and 10f aluminum cap on output. r e t e m a r a p e l u d o m l o b m y s n i m l a c i p y t x a m s t i n u t n i o p t e s e g a t l o v t u p t u o 1 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 t u o v 4 3 2 . 3 5 4 . 2 4 6 7 . 1 7 4 . 1 6 7 1 . 1 3 . 3 5 . 2 8 . 1 5 . 1 2 . 1 6 6 3 . 3 5 5 . 2 6 3 8 . 1 3 5 . 1 4 2 2 . 1 v n o i t a l u g e r d a o l v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 0 . 6 0 . 6 0 . 6 0 . 6 0 . 6 2 1 2 1 0 1 0 1 0 1 v m n o i t a l u g e r e n i ll l a 0 . 25v m e r u t a r e p m e t r e v o n o i t a l u g e r v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 2 2 7 1 2 1 0 1 8 5 4 4 3 5 2 0 2 7 1 v m n o i t a l u g e r e g a t l o v t u p t u o l a t o t v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 2 6 1 5 0 4 5 3 2 3 v m e s i o n d n a e l p p i r t u p t u o 2 l l a 0 30 6p - p v m e s i o n d n a e l p p i r t u p t u o 2 l l a 0 15 2s m r v m e g n a r t n e r r u c t u p t u ol l at u o i0 2 1a t i m i l t n e r r u c c d t u p t u ol l am i l t u o i6 . 5 1 0 3a e g r u s t i u c r i c t r o h s v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 e g r u s t u o i 5 2 . 0 3 . 0 5 3 . 0 5 4 . 0 5 . 0 5 . 0 6 . 0 7 . 0 9 . 0 1 a 2 s e m i t n o n r u tl l an o t 2 10 2s m n o n r u t t a t o o h s r e v ol l a 0% 3v e c n a t i c a p a c t u p t u ol l at u o c0 0 0 8 4f
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 4 output specifications note: all specifications are typical at nominal input, full load at 25 c unless otherwise stated. 3. di/dt = 0.5a/1s, ta = 25 c without external load capacitance. r e t e m a r a p e l u d o m l o b m y s n i m l a c i p y t x a m s t i n u e s n o p s e r t n e i s n a r t 3 ? d a o l x a m f o % 0 0 1 o t % 0 5 v v 3 . 3 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s e s n o p s e r t n e i s n a r t 3 ? d a o l x a m f o % 0 0 1 o t % 0 5 v v 5 . 2 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s e s n o p s e r t n e i s n a r t 3 ? d a o l x a m f o % 0 0 1 o t % 0 5 v v 8 . 1 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s e s n o p s e r t n e i s n a r t 3 ? d a o l x a m f o % 0 0 1 o t % 0 5 v v 5 . 1 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s e s n o p s e r t n e i s n a r t 3 ? d a o l x a m f o % 0 0 1 o t % 0 5 v v 2 . 1 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 90 2 1v m e m i t g n i l t t e ss t 5 30 7s
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 5 control specifications general specifications 1. vin=5v, full load and ta=25 c. 2. see graphs on pages 10-12. 3. with remote on/off pin 8 open, the module is on. r e t e m a r a p e l u d o m l o b m y s n i m l a c i p y t x a m s t i n u y c n e i c i f f e 1 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 9 8 7 8 3 8 1 8 9 8 2 9 0 9 6 8 4 8 2 8 % y c n e u q e r f g n i h c t i w s l l a w s f 0 6 20 0 30 4 3 z h k e g n a r m i r t e g a t l o v t u p t u o 2 l l a0 9 0 1 1 % n o i t a s n e p m o c e s n e s e t o m e r l l a 0 1 % t h g i e wl l a 5 . 0 1 g r e t e m a r a p e l u d o m l o b m y s n i m l a c i p y t x a m s t i n u f f o / n o e t o m e r 3 l l an e t u o v v ) n o t i n u ( w o l l a n g i sl l a0 1v ) f f o t i n u ( h g i h l a n g i sl l a5 . 2 5 . 5v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 6 efficiency data module 3.3v 90% 91% 92% 93% 94% 95% 96% 97% 98% 12345678910111213 output current efficiency 4.5v 5.0v 5.5v module 2.5v 87% 88% 89% 90% 91% 92% 93% 94% 95% 96% 97% 12345678910111213 output current efficiency 4.5v 5.0v 5.5v module 1.8v 83% 84% 85% 86% 87% 88% 89% 90% 91% 92% 93% 94% 95% 12345678910111213 output current efficiency 4.5v 5.0v 5.5v module 1.5v 82% 84% 86% 88% 90% 92% 94% 12345678910111213 output current efficiency 4.5v 5.0v 5.5v module 1.2v 79% 81% 83% 85% 87% 89% 91% 93% 12345678910111213 output current efficiency 4.5v 5.0v 5.5v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 7 ripple and noise ripple and noise at full load and 5vdc input, 3.3vdc output and ta=25 c ripple and noise at full load and 5vdc input, 2.5vdc output and ta=25 c ripple and noise at full load and 5vdc input, 1.8vdc output and ta=25 c 1f ceramic cap and 10f aluminum electrolytic cap added at the output. ripple and noise at full load and 5vdc input, 1.5vdc output and ta=25 c ripple and noise at full load and 5vdc input, 1.2vdc output and 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 ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 8 transient response transient response: di/dt = 0.5a/s, no external load capacitance vout=3.3v 50% to 100% load transients at 5v input and ta=25 c vout=3.3v 100% to 50% load transients at 5v input and ta=25 c vout=2.5v 50% to 100% load transients at 5v input and ta=25 c vout=2.5v 100% to 50% load transients at 5v input and ta=25 c vout=1.8v 50% to 100% load transients at 5v input and ta=25 c vout=1.8v 100% to 50% load transients at 5v input and 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 ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 9 transient response transient response: di/dt = 0.5a/s, no external load capacitance vout=1.2v 50% to 100% load transients at 5v input and ta=25 c vout=1.5v 50% to 100% load transients at 5v input and ta=25 c vout=1.5v 100% to 50% load transients at 5v input and ta=25 c vout=1.2v 100% to 50% load transients at 5v input and ta=25 c thermal considerations
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 10 output voltage set-point adjustment vo tr i m gnd vo tr i m gnd trim down test circuit trim up test circuit output voltage set-point adjustment s7db-12b330 trim resistor calculation 2.97 3 3.04 3.07 3.1 3.13 3.17 3.2 3.23 3.27 3.3 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 3.3 3.33 3.37 3.4 3.43 3.46 3.5 3.53 3.56 3.6 3.63 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adj us ted output volt age vo,adj(v) trim resistor value,rtrim_up(kohm) kohm adj vo vo r down trim ) 82 . 6 , 964 . 7 ( _ ? ? = kohm vo adj vo up rtrim ) 65 . 3 , 536 . 2 ( _ ? ? = where , vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=3.312v vo , ad j is the ad j usted out p ut volta g e. rtrim-u p is the resistance re q uired between trim and gnd. where , vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=3.312v vo , ad j is the ad j usted out p ut volta g e. rtrim-down is the resistance re q uired between trim and vo.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 11 S7DB-12B250 trim resistor calculation s7db-12b180 trim resistor calculation output voltage set-point adjustment 2.25 2.27 2.3 2.33 2.35 2.38 2.4 2.42 2.45 2.48 2.5 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 2.5 2.52 2.55 2.58 2.6 2.63 2.65 2.67 2.7 2.73 2.75 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm) kohm adj vo vo r down trim ) 8 . 6 , 691 . 3 ( _ ? ? = kohm vo adj vo up rtrim ) 64 . 4 , 728 . 1 ( _ ? ? = where , vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=2.509v vo , ad j is the ad j usted out p ut volta g e. rtrim-down is the resistance re q uired between trim and vo. vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=2.509v vo , ad j is the ad j usted out p ut volta g e. rtrim-u p is the resistance re q uired between trim and gnd. where , 1.62 1.64 1.66 1.67 1.69 1.71 1.73 1.75 1.76 1.78 1.8 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 1.8 1.82 1.84 1.85 1.87 1.89 1.91 1.93 1.94 1.96 1.98 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm) kohm adj vo vo r down trim ) 84 . 13 , 869 . 3 ( _ ? ? = kohm vo adj vo up rtrim ) 10 , 072 . 3 ( _ ? ? = vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.808v vo , ad j is the ad j usted out p ut volta g e. rtrim-down is the resistance re q uired between trim and vo. where, vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.808v vo , ad j is the ad j usted out p ut volta g e. rtrim-u p is the resistance re q uired between trim and gnd. where,
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 12 s7db-12b150 trim resistor calculation s7db-12b120 trim resistor calculation output voltage set-point adjustment 1.35 1.37 1.38 1.4 1.41 1.43 1.44 1.46 1.47 1.49 1.5 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 1.5 1.51 1.53 1.54 1.56 1.58 1.59 1.61 1.62 1.64 1.65 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm) kohm adj vo vo r down trim ) 71 . 11 , 716 . 2 ( _ ? ? = kohm vo adj vo up rtrim ) 87 . 7 , 072 . 3 ( _ ? ? = vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.507v vo , ad j is the ad j usted out p ut volta g e. rtrim-down is the resistance re q uired between trim and vo. vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.507v vo , ad j is the ad j usted out p ut volta g e. rtrim-u p is the resistance re q uired between trim and gnd. where, where, 1.08 1.09 1.1 1.12 1.13 1.14 1.15 1.16 1.18 1.19 1.2 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 1.2 1.21 1.22 1.24 1.25 1.26 1.27 1.28 1.3 1.31 1.32 0.01 30.01 60.01 90.01 120.01 150.01 180 210 240 270 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm) kohm adj vo vo r down trim ) 48 . 8 , 562 . 1 ( _ ? ? = kohm vo adj vo up rtrim ) 64 . 4 , 072 . 3 ( _ ? ? = vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.207v vo , ad j is the ad j usted out p ut volta g e. rtrim-down is the resistance re q uired between trim and vo. vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.207v vo , ad j is the ad j usted out p ut volta g e. rtrim-u p is the resistance re q uired between trim and gnd. where, where,
corporate bel fuse inc. 206 van vorst street jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com far east bel fuse ltd. 8f / 8 luk hop street san po kong kowloon, hong kong tel 852-2328-5515 fax 852-2352-3706 www.belfuse.com europe bel fuse europe ltd. preston technology management centre marsh lane, suite g7, preston lancashire, pr1 8ud, u.k. tel 44-1772-556601 fax 44-1772-888366 www.belfuse.com ?2004 bel fuse inc. specifications subject to change without notice. 03.04 power products non-isolated dc/dc converters bp02s7db-12b 5v input / 1.2v ? 3.3v output / 12a page 13 mechanical dimensions are in inches [millimeters]. standard dimension tolerance is 0.005 [0.13] unless otherwise noted. 1.22 [30.99] 0.394 [10.01] 0.67 [17.00] 0.985 [25.02] 5x 0.197 [5.00] 6x 0.102 [2.59] 0.345 [8.76] 0.010 [0.25] 0.827 [21.01] 2x 0.050 [1.27] 2x 0.079 [1.99] 0.004 [0.10] 0?- 5? 0.100 [2.54] 0.120 [3.05] 0.197 [5.00] 0.895 [22.73] suggested pcb pad layout 12 34 5 6 12 11 10 98 7 n i p n o i t c n u f 1d n u o r g 2d n u o r g 3d n u o r g 4d n u o r g 5n i v + 6n i v + 7m i r t 8f f o / n o e t o m e r 9) + ( e s n e s e t o m e r 0 1o v + 1 1o v + 2 1o v +

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