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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 ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a 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-07a modules are a series of non-isolated, step down dc/dc power converters that operate from a nominal 12v source. these converters are available in a range of output voltages from 1.2v to 5.0v. they are packaged in a compact, low profile, surface mount dip package for ease of layout and space savings. 7a maximum output is also provided. standard features include remote on/off, 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 12v source is available. typical applications include file servers, routers, line cards and other computing and communications equipment. applications page 1 s7db-07a 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 0 . 5v 2 1a 7w 0 . 5 3% 2 90 0 5 a 7 0 - b d 7 s v 3 . 3v 2 1a 7w 1 . 3 2% 0 90 3 3 a 7 0 - b d 7 s v 5 . 2v 2 1a 7w 5 . 7 1% 8 80 5 2 a 7 0 - b d 7 s v 8 . 1v 2 1a 7w 6 . 2 1% 3 80 8 1 a 7 0 - b d 7 s v 5 . 1v 2 1a 7w 5 . 0 1% 2 80 5 1 a 7 0 - b d 7 s v 2 . 1v 2 1a 7w 4 . 8% 1 80 2 1 a 7 0 - 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 ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a 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/16v, 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 - 5 1v 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 - 3 . 5 1v e r u t a r e p m e t t n e i b m ab m a t0 0 7c e r u t a r e p m e t e g a r o t sr o t s t0 4 - 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 v8 . 0 12 12 . 3 1v t n e r r u c t u p n i v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 n i i 0 . 4 6 . 2 0 . 2 7 . 1 4 . 1 3 . 1 a t n e r r u c t u p n i d a o l o n v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 0 5 5 4 5 3 0 3 0 3 0 3 5 6 0 6 0 5 5 4 5 4 5 4 a m t n e r r u c t u p n i f f o e t o m e r 14 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 v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 0 2 5 1 2 1 2 1 2 1 2 1 0 3 5 2 5 2 0 2 0 2 0 2 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 v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 0 7 0 5 5 4 5 3 5 3 5 3 0 2 1 0 0 1 0 0 1 0 6 0 6 0 6 k 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 t 8 0 . 06 1 . 0a 2 s d l o h s e r h t e g a t l o v n o n r u t 4 . 0 1v d l o h s e r h t e g a t l o v f f o n r u t2 . 8 v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 3 output specifications note: all specifications are typical at nominal input, full load at 25 c unless otherwise stated. 1. vin = 12v, iout = full load, ta = 25 c. 2. 0 - 20mhz, 0.1f 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 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 t u o v 0 0 9 . 4 7 4 2 . 3 0 6 4 . 2 1 7 7 . 1 6 7 4 . 1 1 8 1 . 1 0 0 . 5 0 3 . 3 0 5 . 2 0 8 . 1 0 5 . 1 0 2 . 1 0 0 1 . 5 3 5 3 . 3 0 4 5 . 2 9 2 8 . 1 4 2 5 . 1 9 1 2 . 1 v n o i t a l u g e r d a o l v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 5 1 0 1 9 9 9 9 0 3 5 . 6 1 5 1 5 1 5 1 5 1 v m n o i t a l u g e r e n i ll l a 30 1v 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 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 0 5 3 3 5 2 8 1 5 1 2 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 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 0 9 5 . 9 5 0 5 3 4 0 4 7 3 v m e s i o n d n a e l p p i r t u p t u o 2 v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 5 7 0 6 0 6 0 6 0 6 0 6 5 2 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 p - 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 5 10 3s 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 7a 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 i1 . 92 16 1a e g r u s t i u c r i c t r o h s v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 e g r u s t u o i 2 . 1 0 . 1 9 . 0 7 . 0 7 . 0 6 . 0 7 . 1 5 . 1 4 . 1 2 . 1 2 . 1 1 . 1 a 2 s e m i t n o n r u t v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 n o t 5 4 0 3 0 3 0 3 0 3 0 3 5 7 0 5 0 5 0 5 0 5 0 5 s m n o n r u t t a t o o h s r e v ol l a 3% e c n a t i c a p a c t u p t u ol l at u o c0 0 0 5 3f
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a 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 with a 220f tantalum cap at 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 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 0 . 5 5 2 10 5 2v m e m i t g n i l t t e ss t 5 20 5s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 5 2 10 5 2v m e m i t g n i l t t e ss t 5 20 5s 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 0 15 6 1v m e m i t g n i l t t e ss t 5 20 5s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 0 15 6 1v m e m i t g n i l t t e ss t 5 20 5s 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 0 10 5 1v m e m i t g n i l t t e ss t 5 20 5s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 0 10 5 1v m e m i t g n i l t t e ss t 5 20 5s 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 0 10 5 1v m e m i t g n i l t t e ss t 0 30 7s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 0 10 5 1v m e m i t g n i l t t e ss t 0 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 0 10 5 1v m e m i t g n i l t t e ss t 0 30 7s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 0 10 5 1v m e m i t g n i l t t e ss t 0 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 1 10 5 1v m e m i t g n i l t t e ss t 0 30 7s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 1 10 5 1v m e m i t g n i l t t e ss t 0 30 7s
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 5 note: on/off pin designed to work with an open collector/drain switch. control specifications general specifications 1. vin=12v, full load and ta=25 c. 2. see graphs on pages 10-13. 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 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 9 8 7 8 5 8 0 8 9 7 8 7 2 9 0 9 8 8 3 8 2 8 1 8 % y c n e u q e r f g n i h c t i w s v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 w s f 5 8 2 0 8 2 8 3 2 0 8 1 0 8 1 0 8 1 5 5 3 0 3 3 0 8 2 0 1 2 0 1 2 0 1 2 5 2 4 0 8 3 2 2 3 0 4 2 0 4 2 0 4 2 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 v 0 . 5 v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 0 9 0 7 0 7 0 9 0 9 0 9 0 1 1 0 1 1 0 1 1 0 2 1 0 2 1 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 8 . 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 ) f f o t i n u ( w o l l a n g i sl l a0 1v ) n o t i n u ( h g i h l a n g i sl l a5 . 2 2 . 3 1v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 6 efficiency data module 5.0v 84% 86% 88% 90% 92% 94% 12345678 output current efficiency 10.8v 12.0v 13.2v module 3.3v 78% 80% 82% 84% 86% 88% 90% 92% 94% 12345678 output current 10.8v 12.0v 13.2v module 2.5v 75% 80% 85% 90% 12345678 output current efficiency 10.8v 12.0v 13.2v module 1.8v 74% 76% 78% 80% 82% 84% 86% 88% 90% 12345678 output current efficiency 10.8v 12.0v 13.2v module 1.5v 74% 79% 84% 89% 12345678 output current efficiency 10.8v 12.0v 13.2v module 1.2v 75% 80% 85% 90% 12345678 output current efficiency 10.8v 12.0v 13.2v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 7 ripple and noise ripple and noise at full load and 12vdc input, 5.0vdc output and ta=25 c ripple and noise at full load and 12vdc input, 3.3vdc output and ta=25 c ripple and noise at full load and 12vdc input, 2.5vdc output and ta=25 c ripple and noise at full load and 12vdc input, 1.8vdc output and ta=25 c 0.1f ceramic cap and 10f aluminum electrolytic cap added at the output. ripple and noise at full load and 12vdc input, 1.5vdc output and ta=25 c ripple and noise at full load and 12vdc 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 ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 8 transient response transient response: di/dt = 0.5a/s, external load capacitance co=220f aluminum cap at output vout=5.0v 50% to 100% load transients at 12v input and ta=25 c vout=5.0v 100% to 50% load transients at 12v input and ta=25 c vout=3.3v 50% to 100% load transients at 12v input and ta=25 c vout=3.3v 100% to 50% load transients at 12v input and ta=25 c vout=2.5v 50% to 100% load transients at 12v input and ta=25 c vout=2.5v 100% to 50% load transients at 12v 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 ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 9 transient response vout=1.8v 50% to 100% load transients at 12v input and ta=25 c vout=1.8v 100% to 50% load transients at 12v input and ta=25 c transient response: di/dt = 0.5a/s, external load capacitance co=470f (tantalum capacitor) vout=1.2v 50% to 100% load transients at 12v input and ta=25 c vout=1.5v 50% to 100% load transients at 12v input and ta=25 c vout=1.5v 100% to 50% load transients at 12v input and ta=25 c vout=1.2v 100% to 50% load transients at 12v 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 ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 10 thermal considerations output voltage set-point adjustment derating curve output current (a) output current vs. local ambient temperature and air velocity ambient temperature, ta (?c) 0 60 30 70 6 7 4 2 0 natural convection 100lfm 10 20 40 50 1 3 5 vo tr i m gnd vo tr i m gnd trim down test circuit trim up test circuit
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 11 s7db-07a500 trim resistor calculation rtrim down = 10.52 vo ? vo, adj ? 4.55 ) kohm ( rtrim up = 2 vo, adj ? vo ? 2.05 ) kohm ( output voltage set-point adjustment s7db-07a330 trim resistor calculation rtrim down = 5.08 vo ? vo, adj ? 4.55 ) kohm ( rtrim up = 3.175 vo, adj ? vo ? 2.05 ) kohm ( 3.5 3.65 3.8 3.95 4.1 4.25 4.4 4.55 4.7 4.85 5 0.05 5.04 10.04 15.04 20.03 25.03 30.02 35.02 40.01 45 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 5 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 1 10.9 20.8 30.7 40.6 50.5 60.4 70.3 80.2 90.1 100 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm) 2.31 2.41 2.51 2.61 2.71 2.8 2.9 3 3.1 3.2 3.3 0.05 5.04 10.04 15.04 20.03 25.03 30.02 35.02 40.01 45 adjusted outp ut 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 1 10.9 20.8 30.7 40.6 50.5 60.4 70.3 80.2 90.1 100 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm)
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a page 12 s7db-07a250 trim resistor calculation rtrim down = 3.926 vo ? vo, adj ? 4.64 ) kohm ( rtrim up = 4.02 vo, adj ? vo ? 1.47 ) kohm ( S7DB-07A180 trim resistor calculation rtrim down = 3.869 vo ? vo, adj ? 11.34 ) kohm ( rtrim up = 3.072 vo, adj ? vo ? 7.5 ) kohm ( output voltage set-point adjustment 1.75 1.83 1.9 1.98 2.05 2.13 2.2 2.27 2.35 2.42 2.5 0.05 5.04 10.04 15.04 20.03 25.03 30.02 35.02 40.01 45 adjusted outp ut 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 10 19 28 37 46 55 64 73 82 91 100 adjusted outp ut voltage vo,adj(v) trim resistor value,rtrim_up (kohm) 1.62 1.64 1.66 1.67 1.69 1.71 1.73 1.75 1.76 1.78 1.8 5 19.5 34 48.5 63 77.5 92 106.5 121 135.5 150 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 1.8 1.84 1.87 1.91 1.94 1.98 2.02 2.05 2.09 2.12 2.16 0.2 10.18 20.16 30.14 40.12 50.1 60.08 70.06 80.04 90.02 adjusted outp ut voltage vo,adj(v) trim resistor value,rtrim_up(kohm)
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a s7db-07a150 trim resistor calculation rtrim down = 2.704 vo ? vo, adj ? 11.34 ) kohm ( rtrim up = 3.072 vo, adj ? vo ? 7.5 ) kohm ( s7db-07a120 trim resistor calculation rtrim down = 0.874 vo ? vo, adj ? 6.58 ) kohm ( rtrim up = 1.728 vo, adj ? vo ? 4.42 ) kohm ( output voltage set-point adjustment page 13 1.35 1.37 1.38 1.4 1.41 1.43 1.44 1.46 1.47 1.49 1.5 5 24.5 44 63.5 83 102.5 122 141.5 161 180.5 200 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 1.5 1.53 1.56 1.59 1.62 1.65 1.68 1.71 1.74 1.77 1.8 0.2 10.18 20.16 30.14 40.12 50.1 60.08 70.06 80.04 90.02 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm) 1.08 1.09 1.1 1.12 1.13 1.14 1.15 1.16 1.18 1.19 1.2 0.1 10.09 20.08 30.07 40.06 50.05 60.04 70.03 80.02 90.01 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 1 20.9 40.8 60.7 80.6 100.5 120.4 140.3 160.2 180.1 200 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm)
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 ?2002 bel fuse inc. specifications subject to change without notice. 09.02 power products non-isolated dc/dc converters bp02s7db-07a 12v input / 1.2v ? 5.0v output / 7a mechanical dimensions are in inches [millimeters]. standard dimension tolerance is 0.005 [0.13] unless otherwise noted. 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 + page 14 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 9 8 7

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