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SPX1580U5-2.5 Datasheet(PDF) 3 Page - Sipex Corporation |
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SPX1580U5-2.5 Datasheet(HTML) 3 Page - Sipex Corporation |
3 / 5 page 3 Date: 5/14/04 SPX1580 7A Ultra Dropout Voltage Regulator ©Copyright 2004 Sipex Corporation The SPX1580 is designed as a high performance and low cost solution for application requiring a lower dropout than traditional NPN regulators. The SPX1580 uses a separate input voltage VCTRL ( VCTRL ≥ VOUT + 1.3V) to minimize the dropout voltage. This allows the 2.5V power for the load to come from a 3.3V system supply. As added benefit this will reduce the heat dissi- pation*, and lower heatsink and cooling fan cost. A typical application would use 3.3V for VIN and 5.0V for VCTRL from a motherboard power supply to provide a nominal 2.5V output. Using the sense pin allows Kelvin measure the output, reducing resistance-associated errors. The SPX1580 can power the 2.5V core voltage for microprocessors such as a PentiumPCTM, P55CTM, AMD5k86TM and K6TM and the IBM PowerPCTM 603EV and 604EV processors. CURRENT LIMIT AMPLIFIER THERMAL OVERLOAD VREF VOLTAGE REGULATION AMPLIFIER S.O.A LIMIT SENSE (4) VCTRL VIN (5) VOUT (3) SENSE (1) ADJ (2) PIN DESCRIPTION BLOCK DIAGRAM r e b m u N n i Pe m a N n i PN O I T P I R C S E D 1E S N E S f o e s n e s n i v l e K s w o ll AV T U O e c n e r e f e r e h t f o e d i s e v i t i s o P ( . d a o l t a ) e c i v e d e h t f o e g a t l o v 2J D A a g n i d d A . e c i v e d e h t 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 e v o r p m i ll i w d n u o r g o t n i p J D A m o r f r o t i c a p a c s s a p y b ll a m s . e s n o p s e r t n e i s n a r t 3V T U O . e c i v e d e h t f o t u p t u o r e w o P 4V L R T C w o l f t n e r r u c e h T . e c i v e d e h t f o y r t i u c r i c l o r t n o c e h t r o f n i p y l p p u S . t n e r r u c t u p t u o e h t f o % 1 t u o b a e b ll i w n i p s i h t o t n iV L R T C e b t s u m e h t r o f e g a t l o v t u p u o e h t n a h t r e t a e r g V 3 . 1 d n a V 1 . 0 n e e w t e b . e t a l u g e r o t e c i v e d 5V N I . n i p s i h t h g u o r h t d e il p p u s s i t n e r r u c d a o l t u p t u OV N I e b t s u m s i h t r o f e g a t l o v t u p t u o e h t n a h t r e t a e r g V 8 . 0 d n a V 1 . 0 n e e w t e b . e t a l u g e r o t e c i v e d APPLICATION INFORMATION |
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