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application manual low noise 150ma l.d.o regulator r1110n series no. ea-046-9803 electronic devices division
no tice 1. the products and the product specifications described in this application manual are subject to change or discontinuation of production without notice for reasons such as improvement. therefore, before deciding to use the products, please refer to ricoh sales representatives for the latest information thereon. 2. this application manual may not be copied or otherwise reproduced in whole or in part without prior written consent of ricoh. 3. please be sure to take any necessary formalities under relevant laws or regulations before exporting or otherwise taking out of your country the products or the technical information described herein. 4. the technical information described in this application manual shows typical characteristics of and example application circuits for the products. the release of such information is not to be construed as a warranty of or a grant of license under ricoh's or any third party's intellectual property rights or any other rights. 5. the products listed in this document are intended and designed for use as general electronic components in standard applications (office equipment, computer equipment, measuring instruments, consumer electronic products, amusement equipment etc.). those customers intending to use a product in an application requiring extreme quality and reliability, for example, in a highly specific application where the failure or misoperation of the product could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system, traffic control system, automotive and transportation equipment, combustion equipment, safety devices, life support system etc.) should first contact us. 6. we are making our continuous effort to improve the quality and reliability of our products, but semiconductor products are likely to fail with certain probability. in order prevent any injury to persons or damages to property resulting from such failure, customers should be careful enough to incorporate safety measures in their design, such as redundancy feature, fire-containment feature and fail-safe feature. we do not assume any liability or responsibility for any loss or damage arising from misuse or inappropriate use of the products. 7. anti-radiation design is not implemented in the products described in this application manual. 8. please contact ricoh sales representatives should you have any questions or comments concerning the products or the technical information. june 1995
r1110n series applica tion manu al contents outline ...................................................................................................... 1 fea tures ................................................................................................... 1 applica tions ............................................................................................. 1 block dia gram ......................................................................................... 2 selection guide ....................................................................................... 2 pin configura tion ................................................................................... 3 pin description ........................................................................................ 3 absolute maximum ra tings ................................................................... 4 electrical chara cteristics ................................................................ 5 opera tion .................................................................................................. 7 test circuits ............................................................................................ 8 typical chara cteristics ....................................................................... 9 1) output v oltage vs . output current ...................................................................... 9 2) output v oltage vs . input v oltage ........................................................................ 9 3) dropout v oltage vs . output current ................................................................... 10 4) output v oltage vs . t emper ature ....................................................................... 11 5) supply current vs . input v oltage ...................................................................... 11 6) supply current vs . t emper ature ....................................................................... 12 7) dropout v oltage vs . set output v oltage .............................................................. 13 8) ripple rejection vs . f requency ........................................................................ 13 9) ripple rejection vs . input v oltage (dc bias) ......................................................... 14 10) line t r ansient response ............................................................................... 15 11) load t r ansient response .............................................................................. 16 typical applica tion .............................................................................. 18 p a cka ge dimension ................................................................................ 18 t aping specifica tion ............................................................................. 19
1 lo w noise 150ma l.d .o regula t or r1110n series outline the r1110n series are voltage regulator ics with high output voltage accuracy, lowest supply current, low on resistance and high ripple rejection by cmos process. each of these voltage regulator ics consists of a voltage reference unit, an error amplifier, resistors, a current limit circuit and a chip enable circuit. these ics perform with low dropout voltage and a chip enable function. the dynamic response to line and load is fast, so these ics are very suitable for the power supply for handheld communi - cation equipment. the output voltage of these ics is fixed with high accuracy. since the package for these ics are sot-23-5(mini-mold)package, high density mounting of the ics on boards is possible. fea tures ?ultra-low supply current ..................... typ. 35 a ?standby current ..................................... typ. 0.1 a ?dropout voltage ..................................... typ. 0.2v (i out =100ma) ?high ripple rejection ............................ typ. 70db (f=1khz) ?high accuracy output voltage ............ 2.0% ?low temperature-drift coefficient of output voltage ....................................... typ. 100ppm/?c ?excellent line regulation ..................... typ. 0.05%/v ?pinout ....................................................... similar to the lp2980 ?small package ......................................... sot-23-5 (mini-mold) applica tions ?power source for portable communication tools, cameras and vcrs. ?power source for battery-powered equipment. ?power source for domestic appliances.
r1110n 2 block dia gram 1 3 2 v o u t g n d v d d c e v r e f 5 c u r r e n t l i m i t 1 3 2 v o u t g n d v d d c e + - - v r e f 5 c u r r e n t l i m i t + - - r 1 1 1 0 n 1 a r 1 1 1 0 n 1 b } } selection guide the output voltage, the active type, the packing type and the taping type for the ics can be selected at the user's request. the selection can be made by designating the part number as shown below: r1110n 1 ? part number - - - a b c code contents a setting output voltage ( v out ) : stepwise setting with a step of 0.1v in the range of 2.0v to 6.0v is possible. designation of chip enable active type : b a : ??active type b : ??active type c designation of taping type : ex. tr, tl (refer to taping specifications, tr type is prescribed as a standard.)
3 r1110n pin configura tion 1 2 3 5 4 ( m a r k s i d e ) ?sot-23-5 pin description pin no. symbol pin description 1 v dd input pin 2 gnd ground pin 3 ce or ce chip enable pin 4 nc no connection 5 v out output pin
r1110n 4 absolute maximum ra tings symbol item rating unit v in input voltage 9 v v ce input voltage for ce/ce pin ?.3 to v in +0.3 v v out output voltage ?.3 to v in +0.3 v i out output current 200 ma p d power dissipation 250 mw topt operating temperature range ?0 to 85 ?c tstg storage temperature range ?5 to 125 ?c absolute maximum ratings absolute maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions. moreover, such values for any two items must not be reached simultaneously. operation above these absolute maximum ratings may cause degradation or permanent damage to the device. these are stress ratings only and do not necessarily imply functional operation below these limits.
5 r1110n electrical chara cteristics symbol item conditions min. typ. max. unit v out output voltage v in ?etv out =1.0v 0.98 1.02 v 1ma i out 30ma i out output current v in ?etv out =1.0v 150 ma when v out =setv out ?.1v d v out load regulation v in ?etv out =1.0v 12 40 mv d i out 1ma i out 80ma v dif dropout voltage iss supply current v in ?etv out =1.0v 35 70 a istandby standby current v in ?etv out =1.0v, v ce =v in 0.1 1.0 a d v out line regulation d v in rr ripple rejection f=1khz, ripple 0.5vp-p 70 db v in ?etv out =1.0v v in input voltage 2.7 8 v d v out output voltage i out =30ma 100 ppm / ? c d topt temperature coefficient ?0? c top t 85?c i lim short current limit v out =0v 50 ma r pu pull up resistance for ce pin 2.5 5 10 m v ceh ce input voltage ? 1.5 v in v v cel ce input voltage ? 0 0.25 v en output noise bw=10hz to 100khz 60 vrms topt=25?c refer to the electical characteristics by output voltage refer to the electical characteristics by output voltage
r1110n 6 ?electrical characteristics by output voltage dropout voltage line regulation v dif (v) ? v out / ? v in (% / v) conditions typ. max. conditions typ. max. 2.0 v out 2.4 0.30 0.70 2.5 v out 2.7 0.24 0.35 0.05 0.20 2.8 v out 3.3 0.20 0.30 3.4 v out 6.0 0.17 0.26 topt=25 ? c i out =100ma i out =30ma setv out +0.7v v in 8v i out =30ma setv out +0.5v v in 8v output voltage v ou t (v) symbol item conditions min. typ. max. unit v out output voltage v in ?etv out =1.0v 0.98 1.02 v 1ma i out 30ma i out output current v in ?etv out =1.0v 150 ma when v out =setv out ?.1v d v out load regulation v in ?etv out =1.0v 12 40 mv d i out 1ma i out 80ma v dif dropout voltage iss supply current v in ?etv out =1.0v 35 70 a istandby standby current v in ?etv out =1.0v, v ce =gnd 0.1 1.0 a d v out line regulation d v in rr ripple rejection f=1khz, ripple 0.5vp-p 70 db v in ?etv out =1.0v v in input voltage 2.7 8 v d v out output voltage i out =30ma 100 ppm / ? c d topt temperature coefficient ?0? c top t 85?c i lim short current limit v out =0v 50 ma r pd pull down resistance for ce pin 2.5 5 10 m v ceh ce input voltage ? 1.5 v in v v cel ce input voltage ? 0 0.25 v en output noise bw=10hz to 100khz 60 vrms topt=25?c refer to the electical charactreistics by output voltage refer to the electical charactreistics by output voltage
7 r1110n r 1 r 2 r 1 r 2 r 1 1 1 0 n 1 a r 1 1 1 0 n 1 b 1 3 2 v o u t g n d v d d c e v r e f 5 c u r r e n t l i m i t 1 3 2 v o u t g n d v d d c e + - - v r e f 5 c u r r e n t l i m i t + - - opera tion in these ics, fluctuation in output voltage v out is detected by feed-back registers r1, r2, and the result is compare with a reference voltage by error amplifier, so that a constant voltage is output. a current limit circuit working for short protect and a chip enable circuit are included.
r1110n 8 c e v o u t o u t 1 0 f 1 0 f v d d i n r 1 1 1 0 n 1 b s e r i e s i o u t 1 3 5 2 g n d c e v o u t o u t 1 0 f 1 0 f v d d i n r 1 1 1 0 n 1 b s e r i e s 1 3 5 2 g n d i s s c e v o u t o u t 1 0 f v d d r 1 1 1 0 n 1 b s e r i e s i o u t 1 3 5 2 g n d p . g c e v o u t o u t i 1 i 2 1 0 f 1 0 f v d d i n r 1 1 1 0 n 1 b s e r i e s 1 3 5 2 g n d test circuits standard t est circuit t est circuit f or supply current t est circuit f or ripple rejection and line t r ansient response t est circuit f or load t r ansient response
9 r1110n r 1 1 1 0 n 3 0 1 b 3 . 5 3 . 0 2 . 5 2 . 0 1 . 5 1 . 0 0 . 5 0 . 0 o u t p u t c u r r e n t i o u t ( m a ) o u t p u t v o l t a g e v o u t ( v ) 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 3 . 5 v 4 . 0 v 5 . 0 v t o p t = 2 5 ? c v i n = 3 . 3 v r 1 1 1 0 n 4 0 1 b 4 . 5 4 . 0 3 . 5 3 . 0 2 . 5 1 . 5 1 . 0 2 . 0 0 . 5 0 . 0 o u t p u t c u r r e n t i o u t ( m a ) o u t p u t v o l t a g e v o u t ( v ) 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 4 . 5 v 5 . 0 v 6 . 0 v t o p t = 2 5 ? c v i n = 4 . 3 v r 1 1 1 0 n 5 0 1 b 6 . 0 5 . 0 4 . 0 3 . 0 2 . 0 1 . 0 0 . 0 o u t p u t c u r r e n t i o u t ( m a ) o u t p u t v o l t a g e v o u t ( v ) 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 t o p t = 2 5 ? c 7 . 0 v 5 . 5 v 6 . 0 v v i n = 5 . 3 v r 1 1 1 0 n 3 0 1 b 3 . 1 3 . 0 2 . 9 2 . 8 2 . 7 2 . 6 2 . 5 i n p u t v o l t a g e v i n ( v ) o u t p u t v o l t a g e v o u t ( v ) 2 . 0 3 . 0 4 . 0 6 . 0 7 . 0 8 . 0 5 . 0 t o p t = 2 5 ? c i o u t = 1 m a 3 0 m a 5 0 m a r 1 1 1 0 n 4 0 1 b 4 . 5 4 . 0 3 . 5 3 . 0 2 . 5 i n p u t v o l t a g e v i n ( v ) o u t p u t v o l t a g e v o u t ( v ) 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 8 . 0 7 . 0 t o p t = 2 5 ? c 3 0 m a 5 0 m a i o u t = 1 m a typical chara cteristics 1) output v olta g e vs. output current 2) output v olta g e vs. input v olta g e
r1110n 10 r 1 1 1 0 n 3 0 1 b 0 . 3 0 0 . 3 5 0 . 4 0 0 . 2 5 0 . 2 0 0 . 1 5 0 . 1 0 0 . 0 5 0 . 0 0 o u t p u t c u r r e n t i o u t ( m a ) d r o p o u t v o l t a g e v d i f ( v ) 0 5 0 1 0 0 1 5 0 4 0 ? c 2 5 ? c t o p t = 8 5 ? c r 1 1 1 0 n 4 0 1 b 0 . 3 0 0 . 3 5 0 . 4 0 0 . 2 5 0 . 2 0 0 . 1 5 0 . 1 0 0 . 0 5 0 . 0 0 o u t p u t c u r r e n t i o u t ( m a ) d r o p o u t v o l t a g e v d i f ( v ) 0 5 0 1 0 0 1 5 0 4 0 ? c 2 5 ? c t o p t = 8 5 ? c r 1 1 1 0 n 5 0 1 b 0 . 3 0 0 . 4 0 0 . 3 5 0 . 2 5 0 . 2 0 0 . 1 5 0 . 1 0 0 . 0 5 0 . 0 0 o u t p u t c u r r e n t i o u t ( m a ) d r o p o u t v o l t a g e v d i f ( v ) 0 5 0 1 0 0 1 5 0 4 0 ? c t o p t = 8 5 ? c 2 5 ? c r 1 1 1 0 n 5 0 1 b 5 . 5 5 . 0 4 . 5 4 . 0 3 . 5 3 . 0 2 . 5 o u t p u t v o l t a g e v o u t ( v ) 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 7 . 0 8 . 0 3 0 m a i o u t = 1 m a 5 0 m a t o p t = 2 5 ? c i n p u t v o l t a g e v i n ( v ) 3) dr opout v olta g e vs. output current
11 r1110n r 1 1 1 0 n 3 0 1 b 2 . 9 2 2 . 9 4 2 . 9 6 2 . 9 8 3 . 0 0 3 . 0 2 3 . 0 4 3 . 0 6 3 . 0 8 3 . 1 0 2 . 9 0 t e m p e r a t u r e t o p t ( ? c ) o u t p u t v o l t a g e v o u t ( v ) 5 0 2 5 0 2 5 5 0 7 5 1 0 0 v i n = 4 v i o u t = 1 0 m a r 1 1 1 0 n 4 0 1 b 3 . 9 2 3 . 9 4 3 . 9 6 3 . 9 8 4 . 0 0 4 . 0 2 4 . 0 4 4 . 0 6 4 . 0 8 4 . 1 0 3 . 9 0 t e m p e r a t u r e t o p t ( ? c ) o u t p u t v o l t a g e v o u t ( v ) 5 0 2 5 0 2 5 5 0 7 5 1 0 0 v i n = 5 v i o u t = 1 0 m a r 1 1 1 0 n 5 0 1 b 4 . 9 2 4 . 9 4 4 . 9 6 4 . 9 8 5 . 0 0 5 . 0 2 5 . 0 4 5 . 0 6 5 . 0 8 5 . 1 0 4 . 9 0 t e m p e r a t u r e t o p t ( ? c ) o u t p u t v o l t a g e v o u t ( v ) 5 0 2 5 0 2 5 5 0 7 5 1 0 0 v i n = 6 v i o u t = 1 0 m a r 1 1 1 0 n 3 0 1 b 1 0 2 0 3 0 4 0 5 0 0 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 7 . 0 8 . 0 t o p t = 2 5 ? c i n p u t v o l t a g e v i n ( v ) s u p p l y c u r r e n t i s s ( a ) r 1 1 1 0 n 4 0 1 b 1 0 2 0 3 0 4 0 5 0 0 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 7 . 0 8 . 0 t o p t = 2 5 ? c i n p u t v o l t a g e v i n ( v ) s u p p l y c u r r e n t i s s ( a ) 4) output v olta g e vs. t emperature 5) suppl y current vs. input v olta g e
r1110n 12 5 0 4 5 4 0 3 5 3 0 2 5 2 0 t e m p e r a t u r e t o p t ( ? c ) s u p p l y c u r r e n t i s s ( a ) 5 0 2 5 0 2 5 5 0 7 5 1 0 0 v i n = 4 v r 1 1 1 0 n 3 0 1 b 5 0 4 5 4 0 3 5 3 0 2 5 2 0 t e m p e r a t u r e t o p t ( ? c ) s u p p l y c u r r e n t i s s ( a ) 5 0 2 5 0 2 5 5 0 7 5 1 0 0 v i n = 5 v r 1 1 1 0 n 4 0 1 b 5 0 4 5 4 0 3 5 3 0 2 5 2 0 t e m p e r a t u r e t o p t ( ? c ) s u p p l y c u r r e n t i s s ( a ) 5 0 2 5 0 2 5 5 0 7 5 1 0 0 v i n = 6 v r 1 1 1 0 n 5 0 1 b r 1 1 1 0 n 5 0 1 b 1 0 2 0 3 0 4 0 5 0 0 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 7 . 0 8 . 0 t o p t = 2 5 ? c i n p u t v o l t a g e v i n ( v ) s u p p l y c u r r e n t i s s ( a ) 6) suppl y current vs. t emperature
13 r1110n r 1 1 1 0 n 3 0 1 b 8 0 7 0 6 0 5 0 4 0 3 0 2 0 0 1 0 f r e q u e n c y f ( k h z ) r i p p l e r e j e c t i o n r r ( d b ) 0 . 1 1 1 0 1 0 0 v i n = 4 v d c + 0 . 5 v p - p c o u t = t a n t a l 4 . 7 f i o u t = 1 m a i o u t = 3 0 m a i o u t = 5 0 m a 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 i out =1ma i out =30ma i out =50ma r1110n301b v in =4v dc +0.5vp-p c out =10 f 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 i out =1ma i out =30ma i out =50ma r1110n401b v in =5v dc +0.5vp-p c out =4.7 f 8 0 7 0 6 0 5 0 4 0 3 0 2 0 0 1 0 f r e q u e n c y f ( k h z ) r i p p l e r e j e c t i o n r r ( d b ) 0 . 1 1 1 0 1 0 0 i o u t = 1 m a i o u t = 3 0 m a i o u t = 5 0 m a r 1 1 1 0 n 4 0 1 b v i n = 5 v d c + 0 . 5 v p - p c o u t = 1 0 f r 1 1 1 0 n 1 b 0 . 7 0 . 6 0 . 5 0 . 4 0 . 3 0 . 2 0 . 0 0 . 1 s e t o u t p u t v o l t a g e v r e g ( v ) d r o p o u t v o l t a g e v d i f ( v ) 2 . 0 3 . 0 4 . 0 6 . 0 5 . 0 t o p t = 2 5 ? c i o u t = 1 5 0 m a i o u t = 1 0 0 m a i o u t = 5 0 m a i o u t = 3 0 m a i o u t = 1 0 m a 7) dr opout v olta g e vs. set output v olta g e 8) ripple rejection vs. frequenc y
r1110n 14 7 0 6 0 5 0 4 0 3 0 2 0 0 1 0 i n p u t v o l t a g e v i n ( v ) r i p p l e r e j e c t i o n r r ( d b ) 3 . 1 3 . 2 3 . 3 3 . 5 3 . 4 i o u t = 1 m a c o u t = 1 0 f f = 4 0 0 h z f = 1 k h z f = 1 0 k h z r 1 1 1 0 n 3 0 1 b 8 0 7 0 6 0 5 0 4 0 3 0 2 0 0 1 0 i n p u t v o l t a g e v i n ( v ) r i p p l e r e j e c t i o n r r ( d b ) 3 . 1 3 . 2 3 . 3 3 . 5 3 . 4 i o u t = 1 0 m a c o u t = 1 0 f f = 4 0 0 h z f = 1 k h z f = 1 0 k h z r 1 1 1 0 n 3 0 1 b 8 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 0 1 0 f r e q u e n c y f ( k h z ) r i p p l e r e j e c t i o n r r ( d b ) 0 . 1 1 1 0 1 0 0 i o u t = 1 m a i o u t = 3 0 m a i o u t = 5 0 m a r 1 1 1 0 n 5 0 1 b v i n = 6 v d c + 0 . 5 v p - p c o u t = 4 . 7 f 8 0 7 0 6 0 5 0 4 0 3 0 2 0 0 1 0 f r e q u e n c y f ( k h z ) r i p p l e r e j e c t i o n r r ( d b ) 0 . 1 1 1 0 1 0 0 i o u t = 1 m a i o u t = 3 0 m a i o u t = 5 0 m a r 1 1 1 0 n 5 0 1 b v i n = 6 v d c + 0 . 5 v p - p c o u t = 1 0 f 7 0 6 0 5 0 4 0 3 0 2 0 0 1 0 i n p u t v o l t a g e v i n ( v ) r i p p l e r e j e c t i o n r r ( d b ) 3 . 1 3 . 2 3 . 3 3 . 5 3 . 4 i o u t = 5 0 m a c o u t = 1 0 f f = 4 0 0 h z f = 1 k h z f = 1 0 k h z r 1 1 1 0 n 3 0 1 b 8 0 9) ripple rejection vs. input v olta g e (dc bias)
15 r1110n 3 . 4 3 . 3 3 . 2 3 . 1 3 . 0 2 . 9 2 . 8 6 5 4 3 2 1 0 t i m e t ( s ) o u t p u t v o l t a g e v o u t ( v ) i n p u t v o l t a g e v i n ( v ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 i o u t = 3 0 m a t r = t f = 5 s c o u t = t a n t a l u m 4 . 7 f r 1 1 1 0 n 3 0 1 b i n p u t v o l t a g e o u t p u t v o l t a g e 3 . 4 3 . 3 3 . 2 3 . 1 3 . 0 2 . 9 2 . 8 6 5 4 3 2 1 0 t i m e t ( s ) o u t p u t v o l t a g e v o u t ( v ) i n p u t v o l t a g e v i n ( v ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 i o u t = 3 0 m a t r = t f = 5 s c o u t = t a n t a l u m 6 . 8 f r 1 1 1 0 n 3 0 1 b i n p u t v o l t a g e o u t p u t v o l t a g e 3 . 4 3 . 3 3 . 2 3 . 1 3 . 0 2 . 9 2 . 8 6 5 4 3 2 1 0 t i m e t ( s ) o u t p u t v o l t a g e v o u t ( v ) i n p u t v o l t a g e v i n ( v ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 i o u t = 3 0 m a t r = t f = 5 s c o u t = t a n t a l u m 1 0 f r 1 1 1 0 n 3 0 1 b i n p u t v o l t a g e o u t p u t v o l t a g e 10) line t ransient response
r1110n 16 v i n = 4 v c i n = t a n t a l u m 1 f c o u t = t a n t a l u m 4 . 7 f r 1 1 1 0 n 3 0 1 b 3 . 4 3 . 3 3 . 2 3 . 1 3 . 0 2 . 9 2 . 8 1 5 0 1 0 0 5 0 0 5 0 1 0 0 1 5 0 t i m e t ( s ) o u t p u t v o l t a g e v o u t ( v ) o u t p u t c u r r e n t i o u t ( m a ) 2 0 4 8 1 0 1 2 1 4 1 6 1 8 2 0 6 o u t p u t c u r r e n t o u t p u t v o l t a g e v i n = 4 v c i n = t a n t a l u m 1 f c o u t = t a n t a l u m 6 . 8 f r 1 1 1 0 n 3 0 1 b 3 . 4 3 . 3 3 . 2 3 . 1 3 . 0 2 . 9 2 . 8 1 5 0 1 0 0 5 0 0 5 0 1 0 0 1 5 0 t i m e t ( s ) o u t p u t v o l t a g e v o u t ( v ) o u t p u t c u r r e n t i o u t ( m a ) 2 0 4 8 1 0 1 2 1 4 1 6 1 8 2 0 6 o u t p u t c u r r e n t o u t p u t v o l t a g e v i n = 4 v c i n = t a n t a l u m 1 f c o u t = t a n t a l u m 1 0 f r 1 1 1 0 n 3 0 1 b 3 . 4 3 . 3 3 . 2 3 . 1 3 . 0 2 . 9 2 . 8 1 5 0 1 0 0 5 0 0 5 0 1 0 0 1 5 0 t i m e t ( s ) o u t p u t v o l t a g e v o u t ( v ) o u t p u t c u r r e n t i o u t ( m a ) 2 0 4 8 1 0 1 2 1 4 1 6 1 8 2 0 6 o u t p u t c u r r e n t o u t p u t v o l t a g e 11) load t ransient response
17 r1110n application hints when using these ics, be sure to take care of following points : ? in these ics, phase compensation is made for securing stable operation even if the load current is varied. for this purpose, be sure to use a capacitor c out with good frequency characteristics and esr (equivalent series resistance) of which is in the range described as follows : the relations between i out (output current) and esr of output capacitor are shown below. the conditions when the white noise level is under 40 v (avg.) are marked as the hatched area in the graph. (note : when the additional ceramic capacitors are connected to the output pin with output capacitor for phase compensation, there are possibilities that the operation will be unstable. because of this, test these ics with as same external components as ones to be used on the pcb.) < measuring conditions > v in =4v freqency band : 10hz to 1mhz temperature : 25?c ? make v dd and gnd line sufficient. when the impedance of these is high, there is a case to pick up the noise or not to work correctly. ? connect the capacitor with a capacitance of 1 f or more between v dd and gnd as close as possible. ? set external components, especially output capacitor, as close as possible to the ics and make wiring shortest. c e r a m i c c a p a c i t o r 4 . 7 f 1 0 0 1 0 1 0 . 1 o u t p u t c u r r e n t i o u t ( m a ) e s r ( w ) 0 5 0 8 0 1 5 0 c e r a m i c c a p a c i t o r 6 . 8 f 1 0 0 1 0 1 0 . 1 o u t p u t c u r r e n t i o u t ( m a ) e s r ( w ) 0 5 0 8 0 1 5 0 c e r a m i c c a p a c i t o r 1 0 f 1 0 0 1 0 1 0 . 1 o u t p u t c u r r e n t i o u t ( m a ) e s r ( w ) 0 5 0 8 0 1 5 0 3 5 2 1 c e c e r a m i c c a p a c i t o r s p e c t r u m a n a l y z e r v o u t i o u t r 1 1 1 0 n 3 0 1 b e s r v i n s . a . c e r a m i c c a p a c i t o r 1 f g n d v i n ?measuring circuit for white noise ; r1110n301b
r1110n 18 typical applica tion ce gnd v dd out v out in r1110n 1a + cap. + cap. ce gnd v dd out v out in r1110n 1b + cap. + cap. 2 . 9 0 . 2 0 . 8 0 . 1 0 . 4 0 . 1 1 . 9 0 . 2 ( 0 . 9 5 ) ( 0 . 9 5 ) 5 4 1 2 3 + 0 . 2 0 . 1 1 . 6 + 0 . 2 0 . 1 1 . 1 + 0 . 1 0 . 0 5 0 . 1 5 2 . 8 0 . 3 0 t o 0 . 1 0 . 2 m i n . p a cka ge dimension (unit : mm) ?sot-23-5
19 r1110n t aping specifica tion (unit : mm) ?sot-23-5 t r t l u s e r d i r e c t i o n o f f e e d 2 . 0 m a x . 0 . 3 0 . 1 4 . 0 0 . 1 2 . 0 0 . 0 5 4 . 0 0 . 1 3 . 3 3 . 2 8 . 0 0 . 3 1 . 7 5 0 . 1 3 . 5 0 . 0 5 1 . 5 + 0 . 1 0
ricoh company, ltd. electronic devices division headquarters 13-1, himemuro-cho, ikeda city, osaka 563-8501, japan phone 81-727-53-1111 fax 81-727-53-6011 yokohama office (international sales) 3-2-3, shin-yokohama, kohoku-ku, yokohama city, kanagawa 222-8530, japan phone 81-45-477-1697 fax 81-45-477-1694 ?1695 http://www.ricoh.co.jp/lsi/english/ ricoh corporation electronic devices division san jose office 3001 orchard parkway, san jose, ca 95134-2088, u.s.a. phone 1-408-432-8800 fax 1-408-432-8375

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