e l ek tr on isch e b a u e lemen te s q21 33 cmos positive voltage regulator * factory pre-set output voltage f e a t u r e s * high accurate * over-temperature shutdown 1.5% * very low dropout voltage * power good output function * short circuit current fold-back * guaranteed 300ma output * current limiting * portable electronics applications * pc peripherals * wireless devices * battery powered widgets * electronic scales * instrumentation * cordless phones and current fold-back to prevent device failure under the "worst" of operating conditions. in applications requiring a low noise, regulated supply, place a 1000pf capacitor between bypass and ground. the sq21 33 is stable with an output capacitance of 2.2mf or greater. 01 -jun-2002 rev. a page 1 of 7 http://www.secosgmbh.com/ any changing of specification will not be informed individual r o h s c o m p l i a n t p r o d u c t typical application circuit functional block diagram r e f . m i n . m a x . r e f . m i l l i m e t e r a 2 . 7 0 3 . 1 0 g 1 . 9 0 r e f . b 2 . 6 0 3 . 0 0 h 1 . 2 0 r e f . c 1 . 4 0 1 . 8 0 i 0 . 1 2 r e f . d 0 . 3 0 0 . 5 5 j 0 . 3 7 r e f . e 0 0 . 1 0 k 0 . 6 0 r e f . f 0 1 0 l 0 . 9 5 r e f . dimensions m i l l i m e t e r * power-saving shutdown mode description the sq21 33 series of positive,linear regulators feature low quiescent current (30ma typ.) with low dropout voltage, making them ideal for battery applications. these rugged devices have both thermal shutdown, s q 2 1 3 3 i n o u t b y p g n d e n o u t i n + c 1 c 2 1 u f 2 . 2 u f 5 v note: if output voltage specification is lower than 1.215v, vref will trimmed to 1.2v
h t t p : / / w w w . s e c o s g m b h . c o m / a n y c h a n g i n g o f s p e c i f i c a t i o n w i l l n o t b e i n f o r m e d i n d i v i d u a l v e h i e h i s d 0 . 1 _ _ _ _ e n i n p u t t h r e s h o l d 2 0 0 . 5 0 . 5 0 1 0 . 4 _ _ u a v v v e n = v i n , v i n = 2 . 7 v v i n = 5 v , v o = 0 v , v e n < v e l i o = 0 . 4 m a , v e n < v e l s h u t d o w n s u p p l y c u r r e n t v e l _ v i n 0 . 4 v i n = 2 . 7 v t o 7 v e n i n p u t b i a s c u r r e n t i e l _ t o 7 v v e n = 0 v , v i n = 2 . 7 v t o 7 v s h u t d o w n o u t p u t v o l t a g e v o , s d u a o u t p u t u n d e r v o l t a g e v u v o u t p u t o v e r v o l t a g e v o v p g l e a k a g e c u r r e n t p g v o l t a g e r a t i n g p g v o l t a g e l o w i l c v p g v o l 8 5 _ _ 7 5 _ _ 1 . 0 _ _ 7 . 0 _ _ 0 . 4 _ _ 1 1 5 1 2 5 _ _ _ _ v v % v o u t ( t ) % v o u t ( t ) 2 . 5 v v o u t ( t ) 5 . 0 v 1 . 2 v v o u t ( t ) < 2 . 5 v 2 . 5 v v o u t ( t ) 5 . 0 v 1 . 2 v v o u t ( t ) < 2 . 5 v v p g = 7 v u a v o i n r e g u l a t i o n i s i n k = 0 . 4 m a s q21 33 c m o s p o s i t i v e v o l t a g e r e g u l a t o r e l e k t r o n i s c h e b a u e l e m e n t e 01-jun-2002 rev. a page 2 of 7 e l e c t r i c a l c h a r a c t e r i s t i c s t a = 2 5 u n l e s s o t h e r w i s e n o t e d c o o c) power dissipation ( input voltage output current output voltage operating ambient temperature junction temperature parameter symbo l ratings unit v ma v c mw v in i out tj max. 8 p d /(v in -v o ) -40~+125 1.2~3.8 -40~+85 380 o max. junction temperature t=100 eds classification topr tj p d 150 b c o c o a b s o l u t e m a x i m u m r a t i n g s thermal resistance q ja 260 c o /w v out i s c p s r r e n 3 0 0 _ _ _ _ s h o r t c i r c u i t c u r r e n t o u t p u t v o l t a g e n o i s e 1 5 0 6 0 5 0 2 0 3 0 _ _ _ _ m a d b u v r m s v i n = v o u t ( t ) + 1 v , v o u t < 0 . 8 v f = 1 0 0 h z f = 1 k h z f = 1 0 k h z c o = 2 . 2 m f i o = 1 0 0 m a c o = 2 . 2 u f f = 1 0 h z ~ 1 0 0 k h z i o = 1 0 m a p o w e r s u p p l y r e j e c t i o n t c 1 5 0 4 _ _ _ _ _ _ o v e r t e m p e r a t u r e s h u t d o w n o v e r t e m p e r a t u r e h y s t e r s i s o u t p u t v o l t a g e t e m p e r a t u r e c o e f f i c i e n t o t s o t h 3 0 3 0 _ c o c o p p m / c o n o t e v _ i n p u t v o l t a g e v i n 3 7 - 0 . 4 0 . 2 0 . 4 4 . 0 v < v ( t ) o u t r e g l i n e l i n e r e g u l a t i o n i 3 0 0 . 0 2 - 0 . 2 0 . 1 a % v = v ( t ) + 1 v , i o = 0 m a _ _ 5 0 - 0 . 1 5 - 0 . 1 0 . 2 0 . 1 5 i o = 1 m a v i n = v o u t ( t ) + 1 t o v o u t ( t ) + 2 1 . 2 v v o u t ( t ) 1 . 4 v 1 . 4 v < v o u t ( t ) 2 . 0 v 2 . 0 v < v o u t ( t ) < 4 . 0 v _ _ g r o u n d p i n c u r r e n t i g n d 3 5 u a v i n = v o u t ( t ) + 2 v , i o = 1 m a ~ 3 0 0 m a q u i e s c e n t c u r r e n t q 1 1 3 0 0 u i n o u t _ 2 . 8 v < v ( t ) v o = v % m v _ _ _ _ 4 0 0 3 0 0 o u t o u t p a r a m e t e r s y m b o l m a x . t y p . c o n d i t i o n m i n . u n i t o u t p u t v o l t a g e o u t p u t c u r r e n t c u r r e n t l i m i t d r o p o u t v o l t a g e v o u t i o i l i m v d r o p o u t - 1 . 5 % 3 0 0 3 0 0 - 1 v m a v o > 1 . 2 v v i n = v o u t ( t ) + 2 v , 1 o = 1 m a v i n = v o u t ( t ) + 2 v , v o u t _ _ _ _ v o u t ( t ) 2 . 0 v 2 . 0 v v o u t ( t ) 2 . 8 v 1 ?? v o u t ( e ) * 0 . 9 6 ( e ) v o u t 2 ( e ) 1 . 5 % 4 5 0 m a l o a d r e g u l a t i o n r e g l o a d 0 . 2 v i n = v o u t ( t ) + 2 v , i o = 1 m a t o 3 0 0 m a 1 . 2 v _ i o = 3 0 0 m a ( e ) - 2 % < v i n = v o u t ( t ) + 2 v ,
01-jun-2002 rev. a page 3 of 7 h t t p : / / w w w .s e c o sg m b h .c o m/ a n y c ha n g i n g o f s pe c if i c a t i o n w ill no t b e i n f o r m ed i nd i v i dual e l e k t r o n i s c h e b a u e l e m e n t e s q 2 1 3 3 - 1 2 p a r t n u m b e r m a r k i n g o u t p u t v o l t a g e p a r t n u m b e r m a r k i n g o u t p u t v o l t a g e s q 2 1 3 3 - 1 8 s q 2 1 3 3 - 2 5 s q 2 1 3 3 - 2 8 s q 2 1 3 3 - 3 0 s q 2 1 3 3 - 3 2 s q 2 1 3 3 - 3 4 s q 2 1 3 3 - 3 6 3 c 1 2 2 1 . 2 v 1 . 8 v 2 . 5 v 2 . 8 v 3 . 0 v 3 . 2 v 3 . 4 v 3 . 6 v s q 2 1 3 3 - 1 5 s q 2 1 3 3 - 2 0 s q 2 1 3 3 - 2 7 s q 2 1 3 3 - 2 9 s q 2 1 3 3 - 3 1 s q 2 1 3 3 - 3 3 s q 2 1 3 3 - 3 5 s q 2 1 3 3 - 37 1 . 5 v 2 . 0 v 2 . 7 v 2 . 9 v 3 . 1 v 3 . 3 v 3 . 5 v 3 . 7 v x x x x 3 c 1 8 2 x x x x 3 c 2 5 2 x x x x 3 c 2 8 2 x x x x 3 c 3 0 2 x x x x 3 c 3 2 2 x x x x 3 c 3 4 2 x x x x 3 c 3 6 2 x x x x 3 c 1 5 2 x x x x 3 c 2 0 2 x x x x 3 c 2 7 2 x x x x 3 c 2 9 2 x x x x 3 c 3 1 2 x x x x 3 c 3 3 2 x x x x 3 c 3 5 2 x x x x 3 c 3 7 2 x x x x s q 2 1 3 3 - 3 8 3 . 8 v s q 2 1 3 3 - 2h 2 . 8 5v 3 c 3 8 2 x x x x 3 c 2 h 2 x x x x ordering information(contd.) s q 2 1 3 3 c m o s p o s i t i v e v o l t a g e r e g u l a t o r c h a r a c t e r i s t i c s c u r v e note 1: v out (e) =effective output voltage (i.e. the output voltage when "v out (t) + 2 .0v" is provided at the vin pin while maintaining a certain i out value). 2: v out (t) =specified output voltage 3: v in (min) =v out +v dropout 4: to prevent the short circuit current protection feature from being prematurely activated, the input voltage must be applied before a current source load is applied.
e l ek tr on isch e b a u e lemen te 01 -jun-2002 rev. a page 4 of 7 http://www.secosgmbh.com/ any changing of specification will not be informed individual s q 21 33 cmos positive voltage regulator
e l e k t r o n i s c h e b a u e l e m e n t e h t t p : / / w w w . s e c o s g m b h . c o m / a n y c h a n g i n g o f s p e c i f i c a t i o n w i l l n o t b e i n f o r m e d i n d i v i d u a l 01-jun-2002 rev. a page 5 of 7 s q 21 33 cmos positive voltage regulator
0 1 - j u n - 2 0 0 2 r e v . a p a g e 6 o f 7 h t t p : / / w w w .s e c o sg m b h .c o m/ a n y c ha n g i n g o f s pe c if i c a t i o n w ill no t b e i n f o r m ed i nd i v i dual e l e k t r o n i s c h e b a u e l e m e n t e s q 21 33 cmos positive voltage regulator
01-jun-2002 rev. a page 7of 7 ht t p : / /www.se cosgmb h.com/ any c ha nging of s pe c ificat ion will no t be inf ormed individual e l e k t r o n i s c h e b a u e l e m e n t e s q 21 33 cmos positive voltage regulator detailed description the sq213 3 of coms regulators contain a pmos pass transistor,voltage reference, error amplifier,over-current protection and thermal shutdown and power good function. t h e p-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. during normal operation, the erro r amplifier compares the output voltage to a precision reference. over-current and thermal shutdown circuits become active when the junction temperature exceeds150 c, or the current exceeds 300ma. during thermal shutdown, the output voltage remains low. normal operation is restored when the junction temperature drops below 120 c . the sq213 3 switches from voltage mode to current mode when the load exceeds the rated output current. this prevents over-stress. the sq213 3 also incorporates o o current fold-back to reduce power dissipation when the output is short circuited. this feature becomes active when the output drops below 0.8 volts, and reduces the current flow by 65%. full current is restored when the voltage exceeds 0.8 volts. external capacitors the sq21 33 is stable with an output capacitance to ground of 2.2uf or greater. ceramic capacitors have the lowest esr, and will offer the best ac performance. conversely, aluminum elertrolytic capacitors exhibit the highest esr, resulting in the poorest ac response. unfortunately, large value ceramic capacitors are comparatively expensive. one option is to parallel a 0.1 uf ceramic capacitor with a 10 uf aluminum electrolytic. the benefit is low esr, high capacitance, and low overall cost. a second capacitor is recommended between the input and ground to stabilize vin. the input capacitor should be at least 0.1uf to have a beneficial effect. all capacitors should be placed in close proximity to the pins. a "quiet" ground termination is desirable . the can be achieved with a "star" connection. enable the enable pin normally floats high. when actively, pulled low, the pmos pass transistor shuts off, and all internal circuits are powered down. in this state, the quiescent current is less than 1ua. this pin behaves much like an electronic switch. power good t h e SQ2133 includes the power good feature.when the output is not within 15% of the specified voltage, it pulls low. this can occur under the following conditions: 1. input votage too low. 2. during over-temperature. 3. during over-current. 1. if output is pulled up. (note: pg pin is an open-drain output.)
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