1 www.semtech.com ez1085 3 amp positive voltage regulator power management revision 2, may 2003 the ez1085 series of high performance positive voltage regulators are designed for use in applications requiring low dropout performance at up to 3a. additionally, the ez1085 series provides excellent regulation over variations in line, load and temperature. outstanding features include low dropout performance at rated current, fast transient response, internal current limiting and thermal shutdown protection of the output device. a variety of options are available for maximum flexibility: the ez1085c has both fixed and adjustable voltage options and is designed for use in commercial applica- tions and the ez1085i is adjustable only for industrial applications. all devices are available in the popular to-220 and to-263 packages. ? low dropout voltage: 1.3v max. for ez1085c, 1.4v max. for ez1085i ? full current rating over line and temperature ? fast transient response ? 2% total output regulation over line, load and temperature ? adjust pin current max 90a over temperature ? fixed/adjustable output voltage (ez1085c) ? line regulation typically 0.015% ? load regulation typically 0.05% ? industrial temperature range (ez1085i) ? to-220 and to-263 packages ? printer and plotter supplies ? instrumentation ? medical equipment ? microcontroller systems ? telecommunication systems ? motherboards ? switching supply post regulation description features applications fixed voltage regulator adjustable voltage regulator typical application circuit vin > 4.75v vout = 3.45v vout = 3.3v vin > 4.75v u1 ez1085 1 2 3 adj out in tab + c2 10uf tant. min. r1 133 ohm, 1% + c1 10uf tant. u1 ez1085c-3.3 1 2 3 gnd out in tab r2 232 ohm, 1% + c1 10uf tant. + c2 10uf tant. min notes: (1) c1 needed if device is far from filter capacitors (2) c2 minimum value required for stability 2 r i 1 r 2 r 1 v v adj ref out ? + ? ? ? ? ? ? + ? =
2 ? 2003 semtech corp. www.semtech.com ez1085 power management r e t e m a r a pl o b m y sm u m i x a ms t i n u e g a t l o v y l p p u s t u p n iv n i 7v n o i t a p i s s i d r e w o pp d d e t i m i l y l l a n r e t n iw e s a c o t n o i t c n u j e c n a t s i s e r l a m r e h t 0 2 2 - o t 3 6 2 - o t c j 3 3 w / c t n e i b m a o t n o i t c n u j e c n a t s i s e r l a m r e h t 0 2 2 - o t 3 6 2 - o t a j 0 5 0 6 w / c e g n a r e r u t a r e p m e t t n e i b m a g n i t a r e p o c 5 8 0 1 z e i 5 8 0 1 z e t a 0 7 o t 0 5 8 o t 0 4 - c e g n a r e r u t a r e p m e t n o i t c n u j g n i t a r e p o c 5 8 0 1 z e i 5 8 0 1 z e t j 5 2 1 o t 0 5 2 1 o t 0 4 - c e g n a r e r u t a r e p m e t e g a r o t st g t s 0 5 1 o t 5 6 -c . c e s 0 1 ) g n i r e d l o s ( e r u t a r e p m e t d a e lt d a e l 0 0 3c ) l e d o m y d o b n a m u h ( g n i t a r d s ed s e2v k r e t e m a r a pl o b m y sv n i i o n i mp y tx a ms t i n u e g a t l o v t u p t u o ) 1 ( v o v 5a m 0v l 5 8 9 . 0 o lv o v l 5 1 0 . 1 o lv x . x - c 5 8 0 1 z e v l 8 9 . 0 o lv l 2 0 . 1 o l e g a t l o v e c n e r e f e r ) 1 ( v f e r v 5a m 0 11 3 2 . 10 5 2 . 19 6 2 . 1v i 5 8 0 1 z e , c 5 8 0 1 z e 5 2 2 . 15 7 2 . 1 e g a t l o v e c n e r e f e r ) 1 ( v e r v 5a m 0 13 3 2 . 10 5 2 . 17 6 2 . 1v n o i t a l u g e r e n i l ) 1 ( g e r ) e n i l ( a m 0 15 4 0 . 0 2 . 0 % n o i t a l u g e r d a o l ) 1 ( g e r ) d a o l ( v 55 1 . 0 4 . 0 % e g a t l o v t u o p o r d ) 2 ( ) 1 ( x . x - c 5 8 0 1 z e , c 5 8 0 1 z ev d a 30 2 . 1 5 3 . 1 v i 5 8 0 1 z e 0 2 . 1 0 4 . 1 t i m i l t n e r r u ci l c 0 . 3 5 . 4a unless otherwise specified: adj. v in = 2.75v to 7.0v and adj. i o = 10ma to 3a; fixed v in = 4.75 to 7.0v and fixed i o = 0 ma to 3a. values in bold apply over full operating ambient temperature range. absolute maximum ratings electrical characteristics exceeding the specifications below may result in permanent damage to the device, or device malfunction. operation outside of th e parameters specified in the electrical characteristics section is not implied.
3 ? 2003 semtech corp. www.semtech.com ez1085 power management r e t e m a r a pl o b m y sv n i i o n i mp y tx a ms t i n u t n e r r u c t n e c s e i u q n o i s r e v e g a t l o v d e x i f i q v 50 1 4 1 a m t n e i c i f f e o c e r u t a r e p m e tt c 5 0 0 . 0c / % t n e r r u c n i p t s u j d ai j d a 5 5 0 9 a e g n a h c t n e r r u c n i p t s u j d a ? i j d a 2 . 0 5 a y t i l i b a t s e r u t a r e p m e tt s v 5a 5 . 0 5 . 0 % t n e r r u c d a o l m u m i n i m s n o i s r e v e g a t l o v j d a i o v 55 0 1 a m e s i o n t u p t u o s m r ) 3 ( v n 3 0 0 . 0v % o o i t a r n o i t c e j e r e l p p i r ) 4 ( r a v 5a 3 0 6 2 7b d notes: (1) low duty cycle pulse testing with kelvin connections required. (2) ? v out , ? v ref = 1% (3) bandwidth of 10 hz to 10 khz. (4) 120 hz input ripple (c adj for adj = 25f). electrical characteristics (cont) unless otherwise specified: adj. v in = 2.75v to 7.0v and adj. i o = 10ma to 3a; fixed v in = 4.75 to 7.0v and fixed i o = 0 ma to 3a. values in bold apply over full operating ambient temperature range.
4 ? 2003 semtech corp. www.semtech.com ez1085 power management e c i v e d ) 2 ( ) 1 ( e g a k c a p r t . x . x - m c 5 8 0 1 z e r t . m i 5 8 0 1 z e 3 6 2 - o t ) 3 ( x . x - t c 5 8 0 1 z e t i 5 8 0 1 z e 0 2 2 - o t ) 4 ( notes: (1) where x.x denotes voltage options (ez1085c only). available voltages are: 2.5v, 3.3v and 3.45v. leave blank for adjustable version (1.3 to 5.7v). contact factory for additional voltage options. (2) where c and i denote commercial (0c to 70c) and industrial (-40c to 85c) ambient temperature ranges. (3) only available in tape and reel packaging. a reel contains 800 devices. (4) only available in tube packaging. a tube contains 50 devices. n i pe m a n n i pn o i t c n u f n i p 1t s u j d a d n u o r g e s n o p s e r t n e i s n a r t . s e c i v e d e l b a t s u j d a r o f e g a t l o v e c n e r e f e r e h t f o e d i s e v i t a g e n e h t s i n i p s i h t . d n u o r g o t n i p t s u j d a e h t m o r f r o t i c a p a c s s a p y b l l a m s a g n i d d a y b d e v o r p m i e b n a c d n a , s t r a p e g a t l o v t u p t u o d e x i f r o f n i a h c k c a b d e e f r o t s i s e r l a n r e t n i e h t f o d n e m o t t o b e h t s i n i p s i h t . d n u o r g o t d e t c e n n o c e b d l u o h s 2t u p t u o . b a t e h t o t d e t c e n n o c y l l a c i r t c e l e s i d n a e c i v e d e h t f o t u p t u o r e w o p e h t s i s i h t 3t u p n i . e c i v e d s s a p e h t d n a y r t i u c r i c l o r t n o c e h t h t o b r o f n i p y l p p u s t u p n i e h t s i s i h t pin configurations ordering information pin descriptions block diagram
5 ? 2003 semtech corp. www.semtech.com ez1085 power management outline drawing - to-220 outline drawing - t0-263
6 ? 2003 semtech corp. www.semtech.com ez1085 power management land pattern - to-263 semtech corporation power management products division 200 flynn road, camarillo, ca. 93012 phone: (805)498-2111 fax (805)498-3804 contact information
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