1999 imp, inc. 408-432-9100/www.impweb.com 1 key features applications u pagers u cellular/gsm/phs phones u instrumentation u wireless terminals u battery powered systems u medical instruments u linear post-regulators u pin compatible with telcom t c1070/1071/1187 u lower dropout voltage for long battery life ?imp2070: 70mv vs. telcom tc1070 120mv ?imp2071: 160mv vs. telcom tc1071 250mv ?IMP2187: 250mv vs. telcom tc1187 400mv u power saving shutdown mode ?0.2? shutdown current u adjustable output voltage u superior load regulation ?0.32% u long battery life ?33? no load ground current u accurate output voltage ? 2.5% over temperature u low drift output: 40ppm/ c u guaranteed minimum output current ?imp2070: 60ma ?imp2071: 110ma ?IMP2187: 160ma u over-current and over-temperature protection u compact sot-23a-5 package imp20 imp20 70/7 70/7 1 1 , imp2 , imp2 1 1 8 8 7 7 p ower m anagement 60ma/1 60ma/1 1 1 0ma/1 0ma/1 60ma 60ma super lo super lo w dr w dr opout cmos opout cmos r r egulat egulat or or s wit s wit h batt h batt er er y lif y lif e e ext ext ending shutdo ending shutdo wn mode and wn mode and a a djus djus t t able output able output the imp2070, imp2071 and IMP2187 feature an adjustable output volt- age. compared to the pin compatible tc1070/1071/1187 devices offered by telcom semiconductor. dropout voltage performance has been improved by up to 40%. load regulation and power supply psrr have been optimized. load regulation is typically 0.32% and psrr is 53db at 1khz. a logic input controlled shutdown mode extends system battery life by reducing quiescent current to 0.2 m a maximum. the shutdown mode can be initiated by a system microcontroller. the regulators were designed with ease of use and stability in mind. stability is guaranteed for 0.47 m f and greater load capacitors with an esr up to 5 w . ceramic or tantalum capacitors can be used. three devices with different guaranteed output current specifications are available: imp2070 (60ma), imp2071 (110ma) and IMP2187 (160ma). typical application 1 m f r1 r1 r2 1 m f + r2 v in v out imp2070 imp2071 IMP2187 adj shutdown* control 1 3 5 4 2 shdn 2070/71_02.eps gnd v out v out = v ref 1 + v ref = 1.2v * tie to v in if not used.
2 408-432-9100/www .impweb.com 1999 imp , inc. imp20 imp20 70/7 70/7 1 1 , imp2 , imp2 1 1 8 8 7 7 imp20 70 imp2071 IMP2187 v in shdn 1 v out 5 3 adj 4 gnd 2 2070/71_01.eps so t -23a * r e b m u n t r a p e g a k c a p t u p t u o e g a t l o v ) v ( t u p t u o t n e r r u c ) a m ( n w o d t u h s n i p t s u j d a n i p r o r r e g a l f t u p t u o e c n e r e f e r n i p s s a p y b g n i k r a m e g a k c a p a b c d t / k u j 0 7 0 2 p m i 5 - a 3 2 t o s e l b a t s u j d a 0 6 l l j j x x t / k u j 1 7 0 2 p m i 5 - a 3 2 t o s e l b a t s u j d a 0 1 1 l l k j x x t / k u j 7 8 1 2 p m i 5 - a 3 2 t o s e l b a t s u j d a 0 6 1 l l l j x x l e e r d n a e p a t s e t a c i d n i t / * e d o c e t a d = x x s p e . 3 0 t _ 1 7 / 0 7 0 2 r e b m u n n i p e m a n n o i t c n u f 1 v n i . t u p n i y l p p u s d e t a l u g e r n u 2 d n g . l a n i m r e t d n u o r g 3 n d h s g n i r u d . w o l c i g o l a s i n d h s n e h w d e r e t n e s i e d o m n w o d t u h s a . t u p n i l o r t n o c n w o d t u h s 0 . 2 o t s p o r d t n e r r u c t n e c s e i u q d n a v 0 o t s l l a f e g a t l o v t u p t u o e h t n w o d t u h s m . a 4 j d a . l a n i m r e t t n e m t s u j d a e g a t l o v t u p t u o 5 v t u o . e g a t l o v t u p t u o s p e . 1 0 t _ 1 7 / 0 7 0 2 pin configuration pin descriptions ordering infor mation
1999 imp , inc. 408-432-9100/www .impweb.com 3 imp20 imp20 70/7 70/7 1 1 , imp2 , imp2 1 1 8 8 7 7 input v oltage . . . . . . . . . . . . . . . . . . . . . . . . . 7v output v oltage . . . . . . . . . . . . . . . . . . . . . . . . 0.3v to v in + 0.3v maximum v oltage on any pin . . . . . . . . . . . . 0.3v to (v in + 0.3v) shutdown v oltage (shdn) . . . . . . . . . . . . . . shdn v in + 0.3v operating junction t emperatur e range . . . 40 c < t j < 125 c storage t emperatur e . . . . . . . . . . . . . . . . . . . 65 c to 150 c power dissipation . . . . . . . . . . . . . . . . . . . . . internally limited note: t j = junction t emperatur e, t a = ambient t emperatur e these ar e str ess ratings only and functional operation is not implied. exposur e to absolute maximum ratings for pr olonged time periods may affect device r eliability . all voltages ar e with r espect to gr ound. v in = v out +1v , i l = 100 m a, c l = 1 m f , shdn > v i h , t a = 25 c, unless otherwise noted. bold/ blue specifications apply for junction temperatur e range 40 c < t j < 125 c. notes: 1. dr opout v oltage is defined as the differ ence between in and out when v r dr ops 2% below its nominal value. 2. specifications which would otherwise be affected by self-heating of the die ar e tested at a constant die temperatur e by using low duty cycle pulse testing. 3. psrr guaranteed by design. r e t e m a r a p l o b m y s s n o i t i d n o c n i m p y t x a m s t i n u e g n a r e g a t l o v t u p n i v n i 0 c t < j 5 2 1 < c 0 5 . 6 v C 0 4 c t < j 5 2 1 < c 0 5 . 6 t n e r r u c t u p t u o m u m i x a m i x a m o 0 7 0 2 p m i 0 6 a m 1 7 0 2 p m i 0 1 1 7 8 1 2 p m i 0 6 1 e g a t l o v t u p t u o e l b a t s u j d a e g n a r v f e r 5 . 5 v e g a t l o v e c n e r e f e r v f e r 5 6 1 . 1 0 2 . 1 5 3 2 . 1 v ) 1 e t o n ( e g a t l o v t u o p o r d v n i v - o i l 0 0 1 = m a 1 v m i l a m 0 2 = 7 1 3 2 i l a m 0 5 = 0 6 0 7 i l ) 7 8 1 2 p m i , 0 7 0 2 p m i ( a m 0 0 1 = 0 9 0 6 1 i l ) 7 8 1 2 p m i ( a m 0 5 1 = 3 4 1 0 5 2 t n e r r u c t n e c s e i u q ) t n e r r u c d n u o r g ( d a o l o n 3 3 0 5 m a t n e r r u c y l p p u s n w o d t u h s i d s n i v 0 = n d h s t j 5 2 c 2 . 0 2 m a t n e i c i f f e o c e r u t a r e p m e t t u p t u o 0 4 m p p / c n o i t a l u g e r l a m r e h t 4 0 . 0 w / % n o i t a l u g e r e n i l v r v 1 + v n i v 6 5 7 3 0 . 0 5 3 . 0 % s p e . a 2 0 t _ 1 7 / 0 7 0 2 absolute maximum ratings electrical characteristics
4 408-432-9100/www .impweb.com 1999 imp , inc. imp20 imp20 70/7 70/7 1 1 , imp2 , imp2 1 1 8 8 7 7 v in = v out +1v , i l = 100 m a, c l = 1 m f , shdn > v i h , t a = 25 c, unless otherwise noted. bold/ blue specifications apply for junction temperatur e range of 40 c < t j < 125 c. r e t e m a r a p l o b m y s s n o i t i d n o c n i m p y t x a m s t i n u : n o i t a l u g e r d a o l 0 7 0 2 p m i i l 0 0 1 = m a m 0 5 o t a 2 3 . 0 0 . 2 % 1 7 0 2 p m i i l 0 0 1 = m a m 0 0 1 o t a 2 3 . 0 0 . 2 7 8 1 2 p m i i l 0 0 1 = m a m 0 5 1 o t a 2 3 . 0 0 . 3 e i d n w o d t u h s l a m r e h t e r u t a r e p m e t 0 5 1 c s i s e r e t s y h n w o d t u h s l a m r e h t 2 1 c n o i t c e j e r e l p p i r r r s p v n i 3 v ( o ) v 1 + v 5 2 . 0 c o 3 . 3 = m c i m a r e c f = . q e r f z h k 1 8 5 b d = . q e r f z h k 0 1 5 4 = . q e r f z h m 1 4 3 e s i o n t u p t u o z h k 0 5 o t z h 0 0 3 i l ) 0 7 0 2 p m i ( a m 0 5 = i l a m 0 0 1 = 0 8 2 m v s m r d l o h s e r h t h g i h t u p n i n d h s v 5 . 2 v n i v 5 . 6 5 4 v f o % n i d l o h s e r h t w o l t u p n i n d h s v 5 . 2 v n i v 5 . 6 5 1 v f o % n i m u m i n i m g a l f r o r r e e g a t l o v y l p p u s 5 . 1 v d l o h s e r h t g a l f r o r r e e g a t l o v v h t v 5 9 . 0 r v s i s e r e t s y h g a l f r o r r e v s y h 0 5 v m w o l t u p t u o g a l f r o r r e e g a t l o v i r o r r e a m 1 = 5 7 0 0 4 v m v o t n i t n e r r u c e s r e v e r t u o v ) n i ( v < ) t u o ( v = h g i h = n d h s n i 0 . 2 a m v ) n i ( v < ) t u o ( w o l = n d h s 7 . 2 m a t i m i l t n e r r u c t u p t u o 0 5 3 0 0 6 a m t n e r r u c e g a k a e l t u p n i t s u j d a i j d a 0 5 a p s p e . b 2 0 t _ 1 7 / 0 7 0 2 electrical characteristics notes: 1. dr opout v oltage is defined as the differ ence between in and out when v r dr ops 2% below its nominal value. 2. specifications which would otherwise be affected by self-heating of the die ar e tested at a constant die temperatur e by using low duty cycle pulse testing. 3. psrr guaranteed by design.
imp20 imp20 70/7 70/7 1 1 , imp2 , imp2 1 1 8 8 7 7 t ypical characteristics 1999 imp , inc. 408-432-9100/www .impweb.com 5 figur e 1. imp2070 psrr at i load = 100ma figur e 2. imp2070 psrr at i load = 1ma psrr (db) frequency (hz) 2070/71_03.eps 1 10 100 1k 10k 100k 10 20 30 40 60 80 50 70 90 psrr (db) frequency (hz) 2070/71_04.eps 1 10 100 1k 10k 100k 10 20 30 40 60 80 50 70 100 90 figur e 3. line t ransient response figur e 4. enable input response v o u t 2 0 7 0 / 7 1 _ 1 2 . e p s 5 0 m v / d i v 2 0 m s / d i v d v i n = 1 v 0 v o u t p u t 2 0 7 0 / 7 1 _ 1 3 . e p s 1 v / d i v 5 v / d i v 1 0 0 m s / d i v 0 v e n a b l e figur e 5. load t ransient response (50ma step) figur e 6. load t ransient response (100ma step) v o u t 2 0 7 0 / 7 1 _ 0 9 . e p s 2 5 m v / d i v 2 0 m a / d i v 5 0 m s / d i v l o a d p u l s e v o u t 2 0 7 0 / 7 1 _ 1 0 . e p s 2 5 m v / d i v 5 0 m a / d i v 5 0 m s / d i v l o a d p u l s e
imp20 imp20 70/7 70/7 1 1 , imp2 , imp2 1 1 8 8 7 7 t ypical characteristics 6 408-432-9100/www .impweb.com 1999 imp , inc. 2 0 7 0 / 7 1 _ 1 1 . e p s 1 0 0 m a / d i v 1 0 0 m s / d i v figur e 7. output curr ent limit application infor mation the imp2070, imp2071 and IMP2187 have been designed to of fer exceptionally low dr opout voltage, adjustable outputs, superior load r egulation and minimum quiescent power . shutdown mode a battery-life-extending mode is available. thr ough the active low shutdown pin, shdn, the r egulator can be enabled or turned of f. the r egulator is shutdown (turned of f) when shdn is low and enabled (turned on) when shdn is high. the shutdown signal can be supplied fr om a cmos gate or fr om an i/o port of a micr ocontr oller . during shutdown, the output voltage falls to 0v and the supply curr ent is typically only 200na. if the shutdown mode is not needed, shdn should be connected dir ectly to the r egulator input voltage pin. output v oltage adjustment adjust input the output voltage setting is determined by the values of r1 and r2 ( figur e 8 ). these r esistors should be between 470k w and 3m w to minimize curr ent. the output voltage setting is calculated using the following equation. the voltage adjustment range of the imp2070, imp2071, and IMP2187 is fr om v ref to (v in ?.05v). a small capacitor (100pf to 0.01 m f) may be added to the adj input to further r educe output noise. a typical 2.45v battery operated supply is shown in figur e 8 . v v r r out ref = + ? ? 1 1 2 output capacitor the imp2070, imp2071 and IMP2187 wer e designed for stable operation with a wide range of capacitor values and type. the output capacitor should be above 0.47 m f . a 1 m f value is r ecom - mended. ceramic or tantalum capacitors ar e suitable with an esr up to 5 w . ther mal shutdown an on-chip thermal pr otection cir cuit shuts the ldo r egulator of f when the die temperatur e exceeds 150 c. ther e is a built in 12 c hyster esis. the r egulator will r emain of f until the die temperatur e dr ops to appr oximately to 138 c. figur e 8. 2.45 battery-operated supply c1 1 m f 3.0v r1 470k c2 1 m f c3 100pf to 0.01 m f (optional) + r2 470k + + v in v out imp2070 imp2071 IMP2187 adj shutdown control (from power control logic) 1 3 5 4 2 shdn 2070/71_12.eps gnd +2.45v
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