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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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a 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 description the bel srah-08b and vrah-08b 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 0.9v to 3.3v. they are 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. standard features include remote on/off, over current and short circuit protection, output voltage adjust and industrial temperature range (-40 to +85 c). the output is closely regulated and the efficiency is typically 92% at full load. these products may be used almost anywhere low voltage silicon is employed and a 5v source is available. typical applications include file servers, routers, line cards and other computing and communications equipment. applications page 1 srah-08b / vrah-08b 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 t n u o m e c a f r u s r e b m u n t r a p t n u o m l a c i t r e v v 3 . 3v 5a 8w 4 . 6 2% 2 90 3 3 b 8 0 - h a r s0 3 3 b 8 0 - h a r v v 5 . 2v 5a 8w 0 2% 0 90 5 2 b 8 0 - h a r s0 5 2 b 8 0 - h a r v v 8 . 1v 5a 8w 4 . 4 1% 6 80 8 1 b 8 0 - h a r s0 8 1 b 8 0 - h a r v v 5 . 1v 5a 8w 2 1% 4 80 5 1 b 8 0 - h a r s0 5 1 b 8 0 - h a r v v 2 . 1v 5a 8w 6 . 9% 2 80 2 1 b 8 0 - h a r s0 2 1 b 8 0 - h a r v v 0 . 1v 5a 8w 8% 0 80 0 1 b 8 0 - h a r s0 0 1 b 8 0 - h a r v v 9 . 0v 5a 8w 2 . 7% 9 70 9 0 b 8 0 - h a r s0 9 0 b 8 0 - h a r v v 3 . 3 - v 9 . 0v 5a 8w 4 . 6 2% 2 90 a 1 b 8 0 - h a r s0 a 1 b 8 0 - h a v v rohs compliant
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a 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 one 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 - 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 - 5 2 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 . 4 5 . 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 v 0 . 1 v 9 . 0 n i i 3 . 7 6 . 5 3 . 4 6 . 3 0 . 3 5 . 2 3 . 2 a t n e r r u c t u p n i d a o l o n l l a 0 8 a m t n e r r u c t u p n i f f o e t o m e r 95 1 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 50 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 5 10 0 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 2 0 . 05 0 . 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 a9 1 . 43 . 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 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a 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 v 0 . 1 v 9 . 0 t u o v 4 3 2 . 3 5 4 . 2 4 6 7 . 1 7 4 . 1 6 7 1 . 1 8 9 . 0 2 8 8 . 0 3 . 3 5 . 2 8 . 1 5 . 1 2 . 1 0 . 1 9 . 0 6 6 3 . 3 5 5 . 2 6 3 8 . 1 3 5 . 1 4 2 2 . 1 2 0 . 1 8 1 9 . 0 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 v 0 . 1 v 9 . 0 6 6 6 3 3 3 3 5 1 5 1 5 1 0 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 25 v 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 ) c 5 8 + o t 0 4 - (v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 v 0 . 1 v 9 . 0 0 2 0 2 0 1 0 1 5 5 5 3 3 5 2 8 1 5 1 0 1 0 1 0 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 v 0 . 1 v 9 . 0 8 2 8 2 8 1 5 1 0 1 0 1 0 1 3 5 5 4 8 3 0 3 5 2 5 2 5 2 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 50 0 1p - 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 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 8a 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 i4 . 0 1 0 2a 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 v 0 . 1 v 9 . 0 e g r u s t u o i 8 0 . 0 5 0 . 0 5 0 . 0 5 0 . 0 5 0 . 0 5 0 . 0 5 0 . 0 2 . 0 1 . 0 1 . 0 1 . 0 1 . 0 1 . 0 1 . 0 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 03% e c n a t i c a p a c t u p t u ol l at u o c0 0 0 3 3f
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a 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/s, ta = 25 c without external load capacitance; when vout=3.3v or 2.5v a 220f aluminum cap is added 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 3 . 3 0 3 15 6 1v m e m i t g n i l t t e ss t 0 0 10 5 1s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 3 15 6 1v m e m i t g n i l t t e ss t 0 0 10 5 1s 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 3 15 6 1v m e m i t g n i l t t e ss t 0 30 6s ? d a o l x a m f o % 0 5 o t % 0 0 1 v 0 2 15 6 1v m e m i t g n i l t t e ss t 0 30 6s 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 2 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 2 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 . 1 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 2 . 1 0 95 2 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 95 2 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 0 . 1 0 70 1 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 70 1 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 9 . 0 0 70 1 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 70 1 1v m e m i t g n i l t t e ss t 5 20 5s
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a page 5 note: on/off pin designed to work with an open collector/drain switch. control specifications general specifications 1. vin=5v, full load and ta=25 c. 2. see graphs on page 13 - 20. 1. with remote on/off pin 1 open, the module is on. 2. signal low and signal high varies based on vin. 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 1 l l an e t u o v v ) f f o t i n u ( w o l l a n g i s 2 v 5 . 4 = n i v l l a3 . 0 - 5 3 . 1 v v 5 . 5 = n i v 5 6 . 1 ) n o t i n u ( h g i h l a n g i s 2 v 5 . 4 = n i v l l a 5 1 . 3 5 . 5v v 5 . 5 = n i v5 8 . 3 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 v 0 . 1 v 9 . 0 9 8 7 8 3 8 1 8 9 7 7 7 6 7 2 9 0 9 6 8 4 8 2 8 0 8 9 7 % 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 5 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 ) m i r t e d i w ( v 8 . 15 . 7 4 2 0 2% e g n a r m i r t e g a t l o v t u p t u o 2 ) m i r t w o r r a n ( v 3 . 3 v 5 . 2 v 8 . 1 v 5 . 1 v 2 . 1 v 0 . 1 v 9 . 0 0 9 0 9 0 9 0 9 0 9 0 9 5 9 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 % t h g i e wl l a 7 . 4 g
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a page 6 efficiency data module 3.3v 88% 89% 90% 91% 92% 93% 94% 95% 96% 1.02.03.04.05.06.07.08.0 output current efficiency 4.5v 5.0v 5.5v module 2.5v 86% 87% 88% 89% 90% 91% 92% 93% 94% 95% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 output current efficiency 4.5v 5.0v 5.5v module 1.8v 83% 85% 87% 89% 91% 93% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 output current efficiency 4.5v 5.0v 5.5v module 1.5v 80% 82% 84% 86% 88% 90% 92% 1.02.03.04.05.06.07.08.0 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a efficiency data page 7 module 1.2v 78% 80% 82% 84% 86% 88% 90% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 output current efficiency 4.5v 5.0v 5.5v module 1.0v 76% 78% 80% 82% 84% 86% 88% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 output current efficiency 4.5v 5.0v 5.5v module 0.9v 76% 78% 80% 82% 84% 86% 88% 1.02.03.04.05.06.07.08.0 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a page 8 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
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a ripple and noise ripple and noise at full load and 5vdc input, 1.0vdc output and ta=25 c ripple and noise at full load and 5vdc input, 0.9vdc 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, 1.2vdc output and ta=25 c page 9
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a page 10 transient response transient response: di/dt = 0.5a/s, no external load capacitance. note: 3.3vdc and 2.5vdc output with external 220uf aluminum 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a page 11 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 vout=1.0v 50% to 100% load transients at 5v input and ta=25 c vout=1.0v 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a page 12 thermal considerations vrah-08b srah-08b transient response transient response: di/dt = 0.5a/s, no external load capacitance vout=0.9v 50% to 100% load transients at 5v input and ta=25 c vout=0.9v 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a page 13 output voltage set-point adjustment vo tr i m gnd vo tr i m gnd trim down test circuit trim up test circuit xrah-08b1a0 trim resistor calculation 0.85 0.94 1.04 1.14 1.23 1.33 1.42 1.52 1.61 1.71 1.8 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 a djus ted output voltage vo,adj (v) trim resistor value rtrim_down(ohm) 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 0 300 600 900 1200 1500 1800 2100 2400 2700 3000 a djus ted output voltage vo,adj(v) trim resistor value,rtrim_up(ohm) ohm adj vo vo r down trim ) 1 . 261 , 362 . 250 ( ? ? = ? ohm vo adj vo r up trim ) 1 . 12 , 2 . 199 ( ? ? = ? where , vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.805v 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=1.805v 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a output voltage set-point adjustment xrah-08b330 trim resistor calculation page 14 2.8 2.85 2.9 2.95 3 3.05 3.1 3.15 3.2 3.25 3.3 500 2000 3500 5000 6500 8000 9500 1.1 . 10 4 1.25 . 10 4 1.4 . 10 4 1.55 . 10 4 a djus ted output voltage vo,adj (v) trim resistor value rtrim_down(ohm) 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 1 . 10 4 a djus ted output voltage vo,adj(v) trim resistor value,rtrim_up(ohm) ohm adj vo vo r down trim ) 651 , 741 . 623 ( ? ? = ? ohm vo adj vo r up trim ) 402 , 2 . 199 ( ? ? = ? where , vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=3.305v 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=3.305v 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a output voltage set-point adjustment xrah-08b250 trim resistor calculation page 15 2.1 2.14 2.18 2.22 2.26 2.3 2.34 2.38 2.42 2.46 2.5 0 1500 3000 4500 6000 7500 9000 1.05 . 10 4 1.2 . 10 4 1.35 . 10 4 1.5 . 10 4 a djus ted output voltage vo,adj (v) trim resistor value rtrim_down(ohm) 2.5 2.54 2.58 2.62 2.66 2.7 2.74 2.78 2.82 2.86 2.9 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 1 . 10 4 a djus ted output voltage vo,adj(v) trim resistor value,rtrim_up(ohm) ohm adj vo vo r down trim ) 760 , 933 . 423 ( ? ? = ? ohm vo adj vo r up trim ) 511 , 2 . 199 ( ? ? = ? where , vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=2.503v 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=2.503v 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.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a output voltage set-point adjustment xrah-08b180 trim resistor calculation page 16 1.5 1.53 1.56 1.59 1.62 1.65 1.68 1.71 1.74 1.77 1.8 0 1500 3000 4500 6000 7500 9000 1.05 . 10 4 1.2 . 10 4 1.35 . 10 4 1.5 . 10 4 a djus ted output voltage vo,adj (v) trim resistor value rtrim_down(ohm) 1.8 1.83 1.86 1.89 1.92 1.95 1.98 2.01 2.04 2.07 2.1 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 1 . 10 4 a djus ted output voltage vo,adj(v) trim resistor value,rtrim_up(ohm) ohm adj vo vo r down trim ) 760 , 362 . 250 ( ? ? = ? ohm vo adj vo r up trim ) 511 , 2 . 199 ( ? ? = ? vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.805v 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=1.805v 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 ,
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a output voltage set-point adjustment xrah-08b150 trim resistor calculation page 17 1.35 1.37 1.38 1.4 1.41 1.43 1.44 1.46 1.47 1.49 1.5 0 1500 3000 4500 6000 7500 9000 1.05 . 10 4 1.2 . 10 4 1.35 . 10 4 1.5 . 10 4 adj us ted output volt age 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 1500 3000 4500 6000 7500 9000 1.05 . 10 4 1.2 . 10 4 1.35 . 10 4 1.5 . 10 4 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm) ohm adj vo vo r down trim ) 522 , 255 . 122 ( ? ? = ? ohm vo adj vo r up trim ) 348 , 2 . 139 ( ? ? = ? where , vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.503v 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. vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.503v 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 ,
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a output voltage set-point adjustment xrah-08b120 trim resistor calculation page 18 1 1.02 1.04 1.06 1.08 1.1 1.12 1.14 1.16 1.18 1.2 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 a djus ted output voltage vo,adj (v) trim resistor value rtrim_down(ohm) 1.2 1.22 1.24 1.26 1.28 1.3 1.32 1.34 1.36 1.38 1.4 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 1 . 10 4 a djus ted output voltage vo,adj(v) trim resistor value,rtrim_up(ohm) where, ohm adj vo vo r down trim ) 200 , 38 . 40 ( ? ? = ? ohm vo adj vo r up trim ) 100 , 80 ( ? ? = ? vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.204v 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=1.204v 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.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a output voltage set-point adjustment xrah-08b100 trim resistor calculation page 19 0.85 0.86 0.88 0.9 0.91 0.93 0.94 0.95 0.97 0.98 1 0 100 200 300 400 500 600 700 800 900 1000 a djus ted output voltage vo,adj (v) trim resistor value rtrim_down(ohm) 1 1.02 1.04 1.06 1.08 1.1 1.12 1.14 1.16 1.18 1.2 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 1 . 10 4 a djus ted output voltage vo,adj(v) trim resistor value,rtrim_up(ohm) ohm adj vo vo r down trim ) 2 . 63 , 544 . 10 ( ? ? = ? ohm vo adj vo r up trim ) 1 . 12 , 88 . 40 ( ? ? = ? where, vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=1.006v 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=1.006v 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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a output voltage set-point adjustment xrah-08b090 trim resistor calculation page 20 0.85 0.855 0.86 0.865 0.87 0.875 0.88 0.885 0.89 0.895 0.9 0 40 80 120 160 200 240 280 320 360 400 a djus ted output voltage vo,adj (v) trim resistor value rtrim_down(ohm) 0.9 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 1 . 10 4 a djus ted output voltage vo,adj(v) trim resistor value,rtrim_up(ohm) ohm adj vo vo r down trim ) 2 . 38 , 751 . 2 ( ? ? = ? ohm vo adj vo r up trim ) 1 . 12 , 88 . 20 ( ? ? = ? vo is the nominal out p ut volta g e set p oint when trim p in is o p en , vo=0.905v 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=0.905v 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,
bel fuse inc. 206 van vorst street, jersey city, nj 07302 tel 201-432-0463 fax 201-432-9542 www.belfuse.com ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a mechanical page 21 srah-08b 0.400 [10.16] 0.60 [15.24] 0.70 [17.78] 0.050 [1.27] 0.100 [2.54] 4x 0.400 [10.16] 0.012 [0.30] 0.050 [1.27] 0.020 [0.51] 0.320 [8.13] 0.780 [19.81] 0.055 [1.40] 2x 0.090 [2.29] 2x 0.004 [0.10] 0?-5? r0.015 [r0.38] typ r0.008 [r0.20] typ 0.100 [2.54] 0.855 [21.72] 0.065 [1.65] 0.110 [2.79] suggested pcb pad layout dimensions are in inches [millimeters]. standard dimension tolerance is ?.005 [0.13] unless otherwise noted. 1 2 3 4 5 6 7 n i p n o i t c n u f 1f f o / n o e t o m e r 2n i v + 3d n u o r g 4o v + 5m i r t 6n o i t c e n n o c o n 7n o i t c e n n o c o n
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 ?2006 bel fuse inc. specifications subject to change without notice. 02.06 power products non-isolated dc/dc converters bp06xrah-08b 5v input / 0.9v ? 3.3v output / 8a mechanical page 22 vrah-08b 0.700 [17.78] 0.600 [15.24] 0.050 [1.27] 0.265 [6.73] min 0.020 [0.51] 0.308 [7.82] 0.050 [1.27] 0.100 [2.54] 0.400 [10.16] dimensions are in inches [millimeters]. standard dimension tolerance is ?.005 [0.13] unless otherwise noted. 2 4 3 5 1 n i p n o i t c n u f 1f f o / n o e t o m e r 2n i v + 3d n u o r g 4o v + 5m i r t rohs compliance complies with the european directive 2002/95/ec, calling for the elimination 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 240oc.

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