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typical application circuit pam3110 1.5a low dropout voltage cmos regulator 1 www.poweranalog.com 06/2011 rev2.2 , power analog microelectronics inc features n output current: up to 1.5a , pb-free package dsp, fpga and microprocessor power supplies sata power supply lcd tv/monitors wireless devices communication devices portable electronics post regulator for smps the pam3110 is a 1.5a cmos ldo regulator that features a low quiescent current and low dropout voltages, as well as over temperature shutdown. the fixed output voltage of the pam3110 is set at the factory and trimmed to 1.5%. the pam3110 is stable with a ceramic output capacitor of 4.7 f or higher. thi s family of regulators can provide either a stand-alone power supply solution or act as a post regulator for switch mode power supplies. they are particularly suitable for applications requiring low input and output voltages. pam3110 is available in sot-223,to-252 and to-263-2l package. n n n n n n n n output voltages:1.2v, 1.5v,1.8v, 2.5v 3.3v and 5.0v stable with a ceramic output capacitor dropout voltage: 400mv@1.5a low quiescent current over temperature shutdown short circuit protection low temperature coefficient applications general description n n n n n n n v in c 4.7 f in c out 4.7 f vin vout gnd pam3110 v o block diagram over current shutdown thermal shutdown amp in out gnd r2 r1
pin configuration & marking information 2 www.poweranalog.com , power analog microelectronics inc pam3110 v voltage code : y year : w week : x internal code : 1.5a low dropout voltage cmos regulator top view sot-223 p3110v a x x y w 1 2 3 top view sot-223 p3110v 1 2 3 top view sot-223 p3110v b x x y w 1 2 3 top view sot-223 p3110v 1 2 3 top view to-252 1 2 3 p3110v a x x y w top view to-252 1 2 3 p3110v b x x y w pam3110abaxxxr pam3110bbaxxxr pam3110alaxxxr pam3110blaxxxr 06/2011 rev2.2 top view to-263-2l 1 3 p3110v a x x y w pam3110ambxxxr pam3110bmbxxxr top view to-263-2l 1 3 p3110v b x x y w 2 2 tab:gnd tab:gnd tab:gnd tab:vout tab:vout tab:vout
absolute maximum ratings these are stress ratings only and functional operation is not implied exposure to absolute maximum ratings for prolonged time periods may affect device reliability all voltages are with respect to ground . . . recommended operating conditions thermal information 3 www.poweranalog.com , power analog microelectronics inc pam3110 input voltage...............................................6v storage temperature 65 to 150 maximum junction temperature 150 ....................- .................. lead soldering temperature (5sec)........... 300 c c c c supply voltage range.......................2.5v to 5.5v junction temperature range........-40 to 125 ambient temperature range...........-40 c to 85 c c c 1.5a low dropout voltage cmos regulator parameter symbol package maximum unit sot-223 7 thermal resistance (junction to case) jc to-252 7 sot-223 160 thermal resistance (junction to ambient) ja to-252 90 c /w sot-223 625 p d to-252 1200 mw to-263 7 to-263 60 to-263 2000 06/2011 rev2.2 internal power dissipation @ta=25c
electrical characteristic parameters symbol test conditions min typ max units input voltage range v in 2.5 5.5 v output voltage accuracy v o i =100ma -1.5 1.5 % o i o =500ma vo 2.5v 200 dropout voltage v drop i o =1.5a vo 2.5v 400 mv short circuit current i sc vo<0.3v 500 ma quiescent current i q i o =0ma 150 a v o 2.5v io=10ma , v in =vo+1.5v to vo+2.5v line regulation lnr v > o 2.5v i , o =10ma v in =vo+0.5v to vo+1.5v 0. 5 1 %/v load regulation ldr i o =1ma to 100ma % over temperature shutdown ots 160 c over temperature hysteresis oth 30 c temperature coefficient tc 40 ppm/c f=100hz 55 f=1khz 50 power supply ripple rejection psrr i o =100ma f=10khz 35 db 4 www.poweranalog.com , power analog microelectronics inc pam3110 v =v +0.5v, t =25c, c =4.7 f, c =4.7 f, unless otherwise noted. in o a in out 1.5a low dropout voltage cmos regulator 75 0.5 1 current limit i lim 2 a 06/2011 rev2.2
pam3110 5 www.poweranalog.com , power analog microelectronics inc typical performance characteristics t =25c,c =4.7 f,c =4.7 f,unless otherwise noted. a in out 1.5a low dropout voltage cmos regulator vo=3.3v vo=3.3v 1. output voltage vs input voltage 2. output voltage vs output current 3. quiescent current vs input voltage 4. quiescent current vs temperature 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 0 3 0 6 0 9 0 1 2 0 1 5 0 t e m p e r a t u r e ( ) 3 . 2 4 3 . 2 5 3 . 2 6 3 . 2 7 3 . 2 8 3 . 2 9 3 . 3 3 . 3 1 3 . 3 2 3 . 3 3 3 . 3 4 3 . 3 5 3 . 3 6 0 3 0 0 6 0 0 9 0 0 1 2 0 0 1 5 0 0 o u t p u t c u r r e n t ( m a ) v i n = 3 . 6 v v i n = 4 . 2 v v i n = 5 v 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 3 . 3 3 . 5 3 . 7 3 . 9 4 . 1 4 . 3 4 . 5 4 . 7 4 . 9 5 . 1 5 . 3 5 . 5 i n p u t c u r r e n t ( v ) 2 . 9 5 3 3 . 0 5 3 . 1 3 . 1 5 3 . 2 3 . 2 5 3 . 3 3 . 3 5 3 3 . 2 5 3 . 5 3 . 7 5 4 4 . 2 5 4 . 5 4 . 7 5 5 5 . 2 5 5 . 5 i n p u t v o l t a g e ( v ) i o = 1 0 m a i o = 5 0 0 m a i o = 1 . 5 a 06/2011 rev2.2 5. maximum output current vs input voltage 0 . 5 0 . 7 0 . 9 1 . 1 1 . 3 1 . 5 2 . 5 3 3 . 5 4 4 . 5 5 5 . 5 input voltage(v)
pam3110 1.5a low dropout voltage cmos regulator 6 www.poweranalog.com , power analog microelectronics inc www.poweranalog.com , power analog microelectronics inc 7. ripple rejection vs frequency vo=3.3v ,v =4.2v,vpp=1v in 8. load transient response vo=3.3v , , io=0ma to 1.5a v =5v in io=1.5a io=500ma io=10ma 9. line transient response vo ac coupling v dc coupling in vo=3.3v, v =3.8v to 5v, io=10ma in vo ac coupling io dc coupling - 1 0 0 + 0 - 9 0 - 8 0 - 7 0 - 6 0 - 5 0 - 4 0 - 3 0 - 2 0 - 1 0 d b 2 0 2 0 k 5 0 1 0 0 2 0 0 5 0 0 1 k 2 k 5 k 1 0 k h z t t t 06/2011 rev2.2 6. safety operation area 0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 1 4 0 0 1 6 0 0 0 1 2 3 4 5 6 v i n - v o u t ( v ) s o t - 2 2 3 t o - 2 5 2 t o - 2 6 3 typical performance characteristics t =25c,c =4.7 f, =4.7 f,unless otherwise noted. a in cout
pam3110 7 www.poweranalog.com , power analog microelectronics inc the pam3110 family of low-dropout (ldo) regulators have several features that allow them to apply to a wide range of applications. the family operates with very low input voltage and low dropout voltage (typically 300mv at full load), making it an efficient stand-alone power supply or post regulator for battery or switch mode power supplies. the 1.5a output current make the pam3110 family suitable for powering many microprocessors and fpga supplies. a 4.7f or larger ceramic input bypass capacit or, connected between v and gnd and located close to the pam3110, is required for stability. a 4.7 f minimum value capacitor from v to gnd is also required. to improve transient response, noise rejection, and ripple rejection, an additional 1 0 f o r l a r g e r , l o w e s r c a p a c i t o r i s recommended at the output. a higher-value, low esr output capacitor may be necessary if large, fast-rise-time load transients are anticipated and the device is located several inches from the power source, especially if the minimum input voltage of 2.5 v is used. the pam3110 features internal current limiting, thermal protection and short circuit protection. during normal operation, the pam3110 limits output current to about 2a. when current limiting engages, the output voltage scales back linearly until the over current condition ends. while current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package. if the temperature of the device exceeds 150c, thermal-protection circuitry will shut down. once the device has cooled down to approximately 30c below the high temp trip point, regulator operation resumes. the short circuit current of the pam3110 is about 0.5a when its output pin is shorted to ground. the amount of heat that an ldo linear regulator generates is: p =(v -v )i . all integrated circuits have a maximum allowable junction temperature (t max) above which normal operation is not assured. a system designer must design the o perating environment so that the operating junction temperature (t ) d o e s n o t e x c e e d t h e m a x i m u m j u n c t i o n t e m p e r a t u r e ( t m a x ) . t h e t w o m a i n environmental variables that a designer can use to improve thermal performance are air flow and e x t e r n a l h e a t s i n k s . t h e p u r p o s e o f t h i s information is to aid the designer in determining the proper operating environment for a linear regulator that is operating at a specific power level. in ge ne r al , t he m a x im um ex p ec t ed po we r (p (max)) consumed by a linear regula tor is computed as: where: v is the average input voltage. v is the average output voltage. i is the average output current. i is the quiescent current. for most ldo regulators, the quiescent current is insignificant compared to the average output current; therefore, the term v xi can be neglected. the operating junction temperature is computed by adding the ambient temperature (t ) and the increase in temperature due t o the regulator' s power dissipation. the temperature rise is computed by multiplying the maximum expected power dissipation by the sum of the thermal resistances between the junction and the case r ), the case to heatsink (r ), and the heatsink to ambient (r ). thermal resistances are measures of how effectively an object dissipates heat. typically, the larger the device, the more surface area available for power dissipation so that the object?s thermal resistance will be lower. external capacitor requirements regulator protection thermal information in o d in o o j j j d i (avg) o(avg) o(avg) (q) i(avg) (q) a jc cs sa ( l l l l application information ( ) ( ) ( ) ( ) ( ) ( ) d m a x i a v g o a v g o a v g i a v g q p = v - v i + v i 1.5a low dropout voltage cmos regulator 06/2011 rev2.2
ordering information 8 www.poweranalog.com , power analog microelectronics inc pam3110 (to be cont?d) 1.5a low dropout voltage cmos regulator output voltage number of pins pam3110 x x x xxx x shipping package package type pin configuration 06/2011 rev2.2 p i n c o n f i g u r a t i o n p a c k a g e t y p e n u m b e r o f p i n s o u t p u t v o l t a g e a t y p e 1 . v i n 2 . g n d 3 . v o u t b t y p e 1 . g n d 2 . v o u t 3 . v i n b : s o t - 2 2 3 l : t o - 2 5 2 m : t o - 2 6 3 a : 3 b : 2 1 2 0 : 1 . 2 v 1 5 0 : 1 . 5 v 1 8 0 : 1 . 8 v 2 5 0 : 2 . 5 v 3 3 0 : 3 . 3 v 5 0 0 : 5 . 0 v
ordering information 9 www.poweranalog.com , power analog microelectronics inc pam3110 1.5a low dropout voltage cmos regulator p a r t n u m b e r o u t p u t v o l t a g e m a r k i n g p a c k a g e t y p e m o q & s h i p p i n g p c k a g e p a m 3 1 1 0 a b a 1 2 0 r 1 . 2 v p 3 1 1 0 b a x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b b a 1 2 0 r 1 . 2 v p 3 1 1 0 b b x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a l a 1 2 0 r 1 . 2 v p 3 1 1 0 b a x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b l a 1 2 0 r 1 . 2 v p 3 1 1 0 b b x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a m b 1 2 0 r 1 . 2 v p 3 1 1 0 b a x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b m b 1 2 0 r 1 . 2 v p 3 1 1 0 b b x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a b a 1 5 0 r 1 . 5 v p 3 1 1 0 c a x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b b a 1 5 0 r 1 . 5 v p 3 1 1 0 c b x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a l a 1 5 0 r 1 . 5 v p 3 1 1 0 c a x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b l a 1 5 0 r 1 . 5 v p 3 1 1 0 c b x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a m b 1 5 0 r 1 . 5 v p 3 1 1 0 c a x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b m b 1 5 0 r 1 . 5 v p 3 1 1 0 c b x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a b a 1 8 0 r 1 . 8 v p 3 1 1 0 e a x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b b a 1 8 0 r 1 . 8 v p 3 1 1 0 e b x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a l a 1 8 0 r 1 . 8 v p 3 1 1 0 e a x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b l a 1 8 0 r 1 . 8 v p 3 1 1 0 e b x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a m b 1 8 0 r 1 . 8 v p 3 1 1 0 e a x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b m b 1 8 0 r 1 . 8 v p 3 1 1 0 e b x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a b a 2 5 0 r 2 . 5 v p 3 1 1 0 g a x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b b a 2 5 0 r 2 . 5 v p 3 1 1 0 g b x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a l a 2 5 0 r 2 . 5 v p 3 1 1 0 g a x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b l a 2 5 0 r 2 . 5 v p 3 1 1 0 g b x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a m b 2 5 0 r 2 . 5 v p 3 1 1 0 g a x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b m b 2 5 0 r 2 . 5 v p 3 1 1 0 g b x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l 06/2011 rev2.2
ordering information 10 www.poweranalog.com , power analog microelectronics inc pam3110 1.5a low dropout voltage cmos regulator p a r t n u m b e r o u t p u t v o l t a g e m a r k i n g p a c k a g e t y p e m o q & s h i p p i n g p c k a g e p a m 3 1 1 0 a b a 3 3 0 r 3 . 3 v p 3 1 1 0 k a x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b b a 3 3 0 r 3 . 3 v p 3 1 1 0 k b x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a l a 3 3 0 r 3 . 3 v p 3 1 1 0 k a x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b l a 3 3 0 r 3 . 3 v p 3 1 1 0 k b x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a m b 3 3 0 r 3 . 3 v p 3 1 1 0 k a x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b m b 3 3 0 r 3 . 3 v p 3 1 1 0 k b x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a b a 5 0 0 r 5 . 0 v p 3 1 1 0 l a x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b b a 5 0 0 r 5 . 0 v p 3 1 1 0 l b x x y w s o t - 2 2 3 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a l a 5 0 0 r 5 . 0 v p 3 1 1 0 l a x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b l a 5 0 0 r 5 . 0 v p 3 1 1 0 l b x x y w t o - 2 5 2 2 , 5 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 a m b 5 0 0 r 5 . 0 v p 3 1 1 0 l a x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l p a m 3 1 1 0 b m b 5 0 0 r 5 . 0 v p 3 1 1 0 l b x x y w t o - 2 6 3 - 2 l 8 0 0 u n i t s / t a p e s & r e e l 06/2011 rev2.2
outline dimension sot-223 11 www.poweranalog.com , power analog microelectronics inc pam3110 dimensions millimeter ( ) symbol min nom max a 6 70 7 00 7 30 . . . c 2 90 3 00 3 10 . . . d 0 02 0 06 0 10 . . . e 0 5 10 i 0 60 0 70 0 80 . . . h 0 25 0 30 0 35 . . . b 13typ j 1 6 30 6 50 6 70 . . . 2 6 30 6 50 6 70 . . . 3 3 30 3 50 3 70 . . . 4 3 30 3 50 3 70 . . . 5 1 40 1 60 1 80 . . . 3 4 e c l j 1 2 2.30ref 1.5a low dropout voltage cmos regulator 06/2011 rev2.2
outline dimension t -252 o 12 www.poweranalog.com , power analog microelectronics inc pam3110 1.5a low dropout voltage cmos regulator 06/2011 rev2.2
outline dimension t -263-2l o 13 www.poweranalog.com , power analog microelectronics inc pam3110 1.5a low dropout voltage cmos regulator 06/2011 rev2.2

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