1 jun 5-07 rev e spx3819 500ma, low noise ldo voltage regulator ? 2007 sipex corporation description features low noise: 40 v possible high accuracy: 1% reverse battery protection low dropout: 340mv at full load low quiescent current: 90 a zero off-mode current fixed output: 1.2v, 1.5v, 1.8v, 2.5v, 3.0v, 3.1v, 3.3v, 5.0v. adj. output also available. available in rohs compliant, lead free packages: 5 pin sot-23, 8 pin narrow soic and 8 pin 2x3 dfn the spx3819 is a positive voltage regulator with a low dropout voltage and low noise output. in addition, this device offers a very low ground current of 800 a at 100ma output. the spx3819 has an initial tolerance of less than 1% max and a logic compatible on/off switched input. when disabled, power consumption drops to nearly zero. other key features include reverse battery protection, current limit, and thermal shutdown. the spx3819 includes a reference bypass pin for optimal low noise output performance. with its very low output temperature coefficient, this device also makes a superior low power voltage reference. the spx3819 is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. it is available in several fixed voltages -- 1.2v, 1.5v, 1.8v, 2.5v, 3.0v, 3.1v, 3.3v, 5.0v -- or with an adjustable output. this device is offered in 8 pin nsoic, 8 pin dfn and 5-pin sot-23 packages. applications battery powered systems cordless phones radio control systems portable/palm top/notebook computers typical application circuit + + gnd en byp (opt.) enable may be tied directly to v in spx3819 1 2 3 4 5 v in v out top view portable consumer equipment portable instrumentation bar code scanners smps post regulators spx3819 8 pin dfn en nc nc nc v in adj/byp v out gnd 5 6 7 8 1 2 3 4 500ma, low-noise ldo voltage regulator spx3819
2 jun 5-07 rev e spx3819 500ma, low noise ldo voltage regulator ? 2007 sipex corporation power dissipation ...................................................... internally limited lead temp. (soldering, 5 seconds) ........................................... 260 c operating junction temperature range ................... -40 c to +125 c input supply voltage ........................................................ -20v to +20v enable input voltage ........................................................ -20v to +20v parameter min typ max units ? conditions output voltage tolerance -1 +1 % -2 +2 ? output voltage temperature coef. 57 ppm/ c line regulation 0.04 0.1 %/v v in =v out + 1v to 16v load regulation 0.05 0.4 % i l = 0.1ma to 500ma dropout voltage 10 60 mv i l = 100 a (v in -v o )(note 2) 80 ? 125 175 mv i l = 50ma 250 ? 180 350 mv i l = 150ma 450 ? 340 550 mv il = 500ma 700 ? quiescent current (i gnd ) 0.05 3 a v e n a b l e 0.4v 8 ? v e n a b l e 0.25v ground pin current (i gnd ) 90 150 a i l = 100 a 190 ? 250 650 a i l = 50ma 900 ? 1.0 2.0 ma i l = 150ma 2.5 ? 6.5 25.0 ma i l = 500ma 30.0 ? ripple rejection (psrr) 70 db current limit (i limi t ) 800 ma v out = 0.0v 950 ? output noise (e no ) 300 v rms i l =10ma, c l =1.0 f, c in =1 f, (10hz-100khz) 40 v rms i l =10ma, c l =10 f, c byp =1 f, c in =1 f, (10hz-100khz) input voltage level logic low (v il ) 0.4 v off input voltage level logic high (v ih ) 2 v on enable input current 0.01 2 a v il 0.4v 3 20 v ih 2.0v thermal resistance (note 1) 191 c/w ? sot-23-5 / junction to ambient 128.4 c/w ? nsoic-8 / junction to ambient 59 c/w ? dfn-8 / junction to ambient electrical characteristics t j =25 c, v out + 1v, for 1.2v option v i n =v out + 1.2v i l =100 a, c l =1 f, and v e n a b l e 2.4v. the ? denotes the specifications which apply over full operating temperature range -40 c to +85 c, unless otherwise specified. absolute maximum ratings notes note 1: the maximum allowable power dissipation is a function of maximum operating junction temperature, t j ( m a x ) the junction to ambient thermal resistance, and the ambient ja , and the ambient temperature t a . the maximum allowable power dissipation at any ambient temperature is given: p d ( m a x ) = (t j ( m a x ) -t a )/ j a , exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. the j a of the spx3819 is 220 c/w mounted on a pc board. note 2: not applicable to output voltage 2v or less. input voltage ................................................................... +2.5v to+16v operating junction temperature range ................... -40 c to +125 c enable input voltage ........................................................... 0.0v to v in recommended operating conditions
3 jun 5-07 rev e spx3819 500ma, low noise ldo voltage regulator ? 2007 sipex corporation typical performance characteristics ground current vs load current ground current vs input voltage 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 0 100 200 300 400 500 i l (ma) i g n d ( m a ) 3.3v device v in = 4.3v c l = 1.0 f 160 150 140 130 120 100 90 80 70 60 4 8 10 12 14 16 v in (v) i g n d ( a ) 3.3v device c l = 1.0 f i l = 100 a ground current vs load current in dropout output voltage vs input voltage 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 0 100 200 300 400 500 i l (ma) i g n d ( m a ) 3.3v device v in = 4.3v c l = 1.0 f 3.350 3.345 3.340 3.335 3.330 3.325 3.320 3.315 3.305 3.300 3.295 3.290 4 6 8 10 12 14 16 v in (v) v o u t ( v ) 3.3v device c l = 1.0 f i l = 100 a 3.310 6
4 jun 5-07 rev e spx3819 500ma, low noise ldo voltage regulator ? 2007 sipex corporation dropout voltage vs load current output voltage vs load current ground current vs temperature with 100 a load ground current vs temperature with 50ma load 350 300 250 200 150 100 50 0 0 100 200 300 400 500 i l (ma) d r o p o u t ( m v ) 3.3v device c l = 1.0 f 0 100 200 300 400 500 i l (ma) v o u t ( v ) 3.3v device v in = 4.3v c l = 1.0 f 130 120 110 100 90 80 70 -40 -20 0 20 40 60 80 100 120 temperature ( c) i g n d ( a ) 3.3v device v in = 4.3 f c l = 1.0 f i l = 100 a 360 340 320 300 280 260 240 220 200 -40 -20 0 20 40 60 80 100 120 temperature ( c) i g n d ( a ) 3.3v device v in = 4.3 c l = 1.0 f i l = 50ma typical performance characteristics: continued 3 .316 3 .314 3.312 3 .310 3 .308 3 .304 3 .302 3 .300 3 .3 06
5 jun 5-07 rev e spx3819 500ma, low noise ldo voltage regulator ? 2007 sipex corporation ground current vs temperature with 500ma load ground current vs temperature in dropout enable voltage, on threshold, vs input voltage output voltage vs temperature 8.0 7.5 7.0 6.5 6.0 -40 -20 0 20 40 60 80 100 120 temperature ( c) i g nd (m a) 3.3v device v in = 4.3 f c l = 1.0 f i l = 500ma 14.0 13.5 13.0 12.5 12.0 11.5 11.0 10.5 -40 -20 0 20 40 60 80 100 120 temperature ( c) i g nd ( m a) 3.3v device v in = 4.3 f c l = 1.0 f i l = 500ma 1.30 1.25 1. 20 1.15 1.10 1.0 5 1.00 4 6 8 10 12 14 16 v in (v) v en , on thr eshol d ( v ) 3.3v device c l = 1.0 f i l = 100 a 3.400 3.380 3.360 3.340 3.320 3.300 2.280 2.260 2.240 2.220 2.200 -40 -20 0 20 40 60 80 100 120 temperature ( c) v o u t ( v) 3.3v device v in = 4.3 f c l = 1.0 f i l = 500ma typical performance characteristics: continued
6 jun 5-07 rev e spx3819 500ma, low noise ldo voltage regulator ? 2007 sipex corporation output noise vs bypass capacitor value i l = 10ma, 10hz - 100khz line transient response for 3.3v device load transient response for 3.3v device typical performance characteristics: continued 0 50 100 150 200 250 300 350 1 10 100 1000 10000 100000 1000000 bypass cap (pf) uv rms cin = 1uft, cout = 1uft cin = 1uft, cout = 2.2uft cin = 1uft cout = 10uft
7 jun 5-07 rev e spx3819 500ma, low noise ldo voltage regulator ? 2007 sipex corporation the spx3819 requires an output capacitor for device stability. its value depends upon the application circuit. in general, linear regulator stability decreases with higher output currents. in applications where the spx3819 is sourcing less current, a lower output capacitance may be sufficient. for example, a regulator outputting only 10ma, requires approximately half the capacitance as the same regulator sourcing 150ma. bench testing is the best method for determining the proper type and value of the capacitor since the high frequency characteristics of electro - lytic capacitors vary widely, depending on type and manufacturer. a high quality 2.2 f alumi - num electrolytic capacitor works in most appli - cation circuits, but the same stability often can be obtained with a 1 f tantalum electrolytic. with the spx3819 adjustable version, the mini - mum value of output capacitance is a function of the output voltage. the value decreases with higher output voltages, since closed loop gain is increased. typical applications circuits a 10nf capacitor on the byp pin will signifi - cantly reduce output noise, but it may be left unconnected if the output noise is not a major concern. the spx3819 start-up speed is in - versely proportional to the size of the byp capacitor. applications requiring a slow ramp- up of the output voltage should use a larger c byp . however, if a rapid turn-on is necessary, the byp capacitor can be omitted. the spx3819? internal reference is available through the byp pin. figure 1 represents a spx3819 standard appli - cation circuit. the en (enable) pin is pulled high (>2.0v) to enable the regulator. to disable the regulator, en < 0.4v. the spx3819 in figure 2 illustrates a typical adjustable output voltage configuration. two resistors (r 1 and r 2 ) set the output voltage. the output voltage is calculated using the formula: v out = 1.235v x [ 1 + r 1 /r 2 ] r 2 must be > 10 k ? and for best results, r 2 should be between 22 k ? and 47k ? . application information + + gnd en byp (opt.) enable may be tied directly to v in spx3819 1 2 3 4 5 v in v out top view + + gnd en hi-on lo-off spx3819 sot-23 1 2 3 4 5 v in v out r1 r2 top view figure 1. standard application circuit figure 2. typical adjustable output voltage configuration
8 jun 5-07 rev e spx3819 500ma, low noise ldo voltage regulator ? 2007 sipex corporation package: pinouts package: pin description # nip ciosn # nip nfd # nip 3-tos e man nip n oit p ircsed 2 3 1 v n i t u p n i y l p p u s 8 -5 7 2 d n g d n u o r g 3 5 5 v t u o t u p t u o r o t a l u g e r 1 1 3 n e e l b i t a p m o c s o m c . ) t u p n i ( e l b a n e ; e l b a n e = h g i h c i g o l . t u p n i l o r t n o c n w o d t u h s = n e p o r o w o l c i g o l 4 8 4 p y b /j d a . t u p n i k c a b d e e f . ) t u p n i ( t s u j d a r e d i v i d -e g a t l o v e v i t s i s e r o t t c e n n o c k r o w t e n - 6 , 4 - c n t c e n n o c o n spx3819 8 pin dfn en nc nc nc v in adj/byp v out gnd 5 6 7 8 1 2 3 4 1 2 3 4 5 6 7 8 en adj/byp gnd v out v in gnd gnd gnd spx3819 8 pin nsoic en gnd v in adj/byp v out spx3819 5 pin sot-23 1 2 4 5 3 note: the bottom exposed pad for the spx3819 dfn package is connected to gnd.
ordering information part number accuracy msl level status package pack type quantity rohs spx3819s-l/tr 0.01 l1 @ 260oc active nsoic8 tape & reel 2500 yes spx3819s-l-1-8/tr 0.01 l1 @ 260oc active nsoic8 tape & reel 2500 yes spx3819s-l-2-5/tr 0.01 l1 @ 260oc active nsoic8 tape & reel 2500 yes spx3819s-l-3-0/tr 0.01 l1 @ 260oc active nsoic8 tape & reel 2500 yes spx3819s-l-3-1/tr 0.01 l1 @ 260oc active nsoic8 tape & reel 2500 yes spx3819s-l-3-3/tr 0.01 l1 @ 260oc active nsoic8 tape & reel 2500 yes spx3819s-l-5-0/tr 0.01 l1 @ 260oc active nsoic8 tape & reel 2500 yes spx3819s-l 0.01 l1 @ 260oc active nsoic8 tube 98 yes spx3819s-l-1-8 0.01 l1 @ 260oc active nsoic8 tube 98 yes spx3819s-l-2-5 0.01 l1 @ 260oc active nsoic8 tube 98 yes spx3819s-l-3-0 0.01 l1 @ 260oc active nsoic8 tube 98 yes spx3819s-l-3-1 0.01 l1 @ 260oc active nsoic8 tube 98 yes spx3819s-l-3-3 0.01 l1 @ 260oc active nsoic8 tube 98 yes spx3819s-l-5-0 0.01 l1 @ 260oc active nsoic8 tube 98 yes spx3819m5-l 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l-1-2 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l-1-5 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l-1-8 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l-2-5 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l-3-0 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l-3-1 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l-3-3 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l-5-0 0.01 l1 @ 260oc active sot-23-5 not in bulk 2500 yes spx3819m5-l/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819m5-l-1-2/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819m5-l-1-5/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819m5-l-1-8/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819m5-l-2-5/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819m5-l-3-0/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819m5-l-3-1/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819m5-l-3-3/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819m5-l-5-0/tr 0.01 l1 @ 260oc active sot-23-5 tape & reel 2500 yes spx3819r2-l-1-2 0.01 l1 @ 250oc cf dfn8 not in bulk 3000 yes spx3819r2-l-1-2/tr 0.01 l1 @ 250oc cf dfn8 tape & reel 3000 yes spx3819s-l-1-2/tr 0.01 l1 @ 260oc cf soic-8 tape & reel 2500 yes spx3819s-l-1-5/tr 0.01 l1 @ 260oc cf soic-8 tape & reel 2500 yes spx3819s-l-1-2 0.01 l1 @ 260oc cf soic-8 tube 98 yes spx3819s-l-1-5 0.01 l1 @ 260oc cf soic-8 tube 98 yes
ordering information part number accuracy msl level status package pack type quantity rohs spx3819r2-l 0.01 l1 @ 250oc eol dfn8 not in bulk 3000 yes spx3819r2-l-1-5 0.01 l1 @ 250oc eol dfn8 not in bulk 3000 yes spx3819r2-l-1-8 0.01 l1 @ 250oc eol dfn8 not in bulk 3000 yes spx3819r2-l-3-3 0.01 l1 @ 250oc eol dfn8 not in bulk 3000 yes spx3819r2-l-5-0 0.01 l1 @ 250oc eol dfn8 not in bulk 3000 yes spx3819r2-1-2 0.01 l1 @ 240oc eol dfn8 not in bulk 3000 no spx3819r2-3-3 0.01 l1 @ 240oc eol dfn8 not in bulk 3000 no spx3819r2-1-2/tr 0.01 l1 @ 240oc eol dfn8 tape & reel 3000 no spx3819s/tr 0.01 l1 @ 240oc eol nsoic8 tape & reel 2500 no spx3819s-2-5/tr 0.01 l1 @ 240oc eol nsoic8 tape & reel 2500 no spx3819s 0.01 l1 @ 240oc eol nsoic8 tube 98 no spx3819s-2-5 0.01 l1 @ 240oc eol nsoic8 tube 98 no spx3819s-3-3/tr 0.01 l1 @ 240oc eol soic-8 tape & reel 2500 no spx3819s-1-8 0.01 l1 @ 240oc eol soic-8 tube 98 no spx3819s-3-3 0.01 l1 @ 240oc eol soic-8 tube 98 no spx3819s-5-0 0.01 l1 @ 240oc eol soic-8 tube 98 no spx3819m5 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5-1-2 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5-1-5 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5-1-8 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5-2-5 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5-3-0 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5-3-1 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5-3-3 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5-5-0 0.01 l1 @ 240oc eol sot-23-5 not in bulk 2500 no spx3819m5/tr 0.01 l1 @ 240oc eol sot-23-5 tape & reel 2500 no spx3819m5-1-2/tr 0.01 l1 @ 240oc eol sot-23-5 tape & reel 2500 no spx3819m5-1-5/tr 0.01 l1 @ 240oc eol sot-23-5 tape & reel 2500 no spx3819m5-1-8/tr 0.01 l1 @ 240oc eol sot-23-5 tape & reel 2500 no spx3819m5-2-5/tr 0.01 l1 @ 240oc eol sot-23-5 tape & reel 2500 no spx3819m5-3-0/tr 0.01 l1 @ 240oc eol sot-23-5 tape & reel 2500 no spx3819m5-3-3/tr 0.01 l1 @ 240oc eol sot-23-5 tape & reel 2500 no spx3819m5-5-0/tr 0.01 l1 @ 240oc eol sot-23-5 tape & reel 2500 no solved by tm for further assistance: email: sipexsupport@sipex.com www support page: http://www.sipex.com/content.aspx?p=support sipex application notes: http://www.sipex.com/applicationnotes.aspx sipex corporation headquarters and sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
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