texas instruments tps3514 datasheet

8/10/2019 Texas Instruments TPS3514 datasheet

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F E A T U R E S D E S C R I P T I O N

PGI

GND

FPO

PSON

IS12

RI

NC

PGO

VDD

VS5

VS33

VS12

IS33

IS5

5V

3.3V

12V

TPS3514

560Ω

56kΩ

R2Ω

R1Ω 470kΩ 1kΩ

820Ω

1.5kΩ

0.01Ω

0.01Ω

0.01ΩIO

5V VSB

12V

5V

3.3V5V VSB

PG

From Transformer

System Side Power Supply

Output Side

T P S 3 5 1 4

S L V S 4 2 2 C – J U N E 2 0 0 2 – R E V I S E D D E C E M B E R 2 0 0 6

P C P O W E R - S U P P L Y S U P E R V I S O R S

• O v e r - V o l t a g e P r o t e c t i o n a n d T h e T P S 3 5 1 4 i s a P C s w i t c h i n g p o w e r - s u p p l y L o c k o u t : 1 2 V , 5 V , a n d 3 . 3 V S u p p l i e s s y s t e m m o n i t o r w i t h m i n i m u m e x t e r n a l c o m p o n e n t s .

I t p r o v i d e s u n d e r - v o l t a g e l o c k o u t ( U V L O ) , • O v e r - C u r r e n t P r o t e c t i o n a n d o v e r - v o l t a g e ( O V ) , u n d e r - v o l t a g e ( U V ) , o v e r - c u r r e n t L o c k o u t : 1 2 V , 5 V , a n d 3 . 3 V S u p p l i e s ( O C ) p r o t e c t i o n c i r c u i t s , p o w e r - g o o d i n d i c a t o r , a n d

• U n d e r - V o l t a g e P r o t e c t i o n a n d o n / o f f c o n t r o l .

L o c k o u t : 1 2 V S u p p l i e s U V L O t h r e s h o l d s a r e 4 . 4 5 V ( o n ) a n d 3 . 6 5 V ( o f f ) .

• U n d e r - V o l t a g e D e t e c t : 5 V a n d 3 . 3 V S u p p l i e s O v e r - c u r r e n t p r o t e c t i o n ( O C P ) a n d o v e r - v o l t a g e

• F a u l t - P r o t e c t i o n O u t p u t w i t h O p e n - D r a i n p r o t e c t i o n ( O V P ) m o n i t o r 3 . 3 V , 5 V , a n d 1 2 V O u t p u t S t a g e s u p p l i e s . W h e n a n O C o r O V c o n d i t i o n i s d e t e c t e d ,

t h e p o w e r - g o o d o u t p u t ( P G O ) i s a s s e r t e d l o w a n d • O p e n - D r a i n , P o w e r - G o o d O u t p u t S i g n a l : t h e f a u l t p r o t e c t i o n o u t p u t ( F P O ) i s l a t c h e d h i g h . M o n i t o r s P o w e r - G o o d S i g n a l I n p u t 3 . 3 V a n d P S O N f r o m l o w - t o - h i g h r e s e t s t h e l a t c h . T h e O C P 5 V S u p p l i e s

f u n c t i o n w i l l b e e n a b l e d 7 5 m s a f t e r P S O N g o e s L O W • 3 0 0 m s P o w e r - G o o d D e l a y w i t h P G I H I G H a n d a d e b o u n c e o f t y p i c a l l y 3 8 m s . A • 7 5 m s D e l a y : 5 V , 3 . 3 V P o w e r - S u p p l y b u i l t - i n 2 . 3 m s d e l a y w i t h 3 8 m s d e b o u n c e f r o m P S O N

t o F P O o u t p u t i s e n a b l e d a t t u r n - o f f . S h o r t - C i r c u i t T u r n - O n P r o t e c t i o n

• 2 . 3 m s P S O N C o n t r o l T o F P O T u r n - O f f D e l a y A n e x t e r n a l r e s i s t o r i s c o n n e c t e d b e t w e e n t h e R I p i n a n d t h e G N D p i n . T h i s w i l l p r o g r a m a p r e c i s e I ( R E F ) • 3 8 m s P S O N C o n t r o l D e b o u n c e f o r O C P f u n c t i o n . T h e p r o g r a m m a b l e I ( R E F ) r a n g e i s • W i d e S u p p l y V o l t a g e R a n g e : 4 . 5 V t o 1 5 V f r o m 1 2 . 5 µ A t o 6 2 . 5 µ A . T h r e e O C P c o m p a r a t o r s a n d t h e I ( R E F ) s e c t i o n a r e s u p p l i e d b y V S 1 2 . T h e c u r r e n t d r a w f r o m t h e V S 1 2 p i n i s l e s s t h a n 1 m A .

T h e p o w e r - g o o d f e a t u r e m o n i t o r s P G I , t h e 3 . 3 V a n d 5 V s u p p l i e s , a n d i s s u e s a p o w e r - g o o d s i g n a l w h e n t h e o u t p u t i s r e a d y .

T h e T P S 3 5 1 4 i s c h a r a c t e r i z e d f o r o p e r a t i o n f r o m – 4 0 ° C t o + 8 5 ° C . T h e T P S 3 5 1 4 i s a v a i l a b l e i n D I P - 1 4 a n d S O - 1 4 p a c k a g e s .

P l e a s e b e a w a r e t h a t a n i m p o r t a n t n o t i c e c o n c e r n i n g a v a i l a b i l i t y , s t a n d a r d w a r r a n t y , a n d u s e i n c r i t i c a l a p p l i c a t i o n s o f T e x a s I n s t r u m e n t s s e m i c o n d u c t o r p r o d u c t s a n d d i s c l a i m e r s t h e r e t o a p p e a r s a t t h e e n d o f t h i s d a t a s h e e t .

A l l t r a d e m a r k s a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .

P R O D U C T I O N D A T A i n f o r m a t i o n i s c u r r e n t a s o f p u b l i c a t i o n d a t e . C o p y r i g h t © 2 0 0 2 – 2 0 0 6 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d P r o d u c t s c o n f o r m t o s p e c i f i c a t i o n s p e r t h e t e r m s o f t h e T e x a s I n s t r u m e n t s s t a n d a r d w a r r a n t y . P r o d u c t i o n p r o c e s s i n g d o e s n o t

n e c e s s a r i l y i n c l u d e t e s t i n g o f a l l p a r a m e t e r s .

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A B S O L U T E M A X I M U M R A T I N G S

T P S 3 5 1 4


T h i s i n t e g r a t e d c i r c u i t c a n b e d a m a g e d b y E S D . T e x a s I n s t r u m e n t s r e c o m m e n d s t h a t a l l i n t e g r a t e d c i r c u i t s b e h a n d l e d w i t h a p p r o p r i a t e p r e c a u t i o n s . F a i l u r e t o o b s e r v e p r o p e r h a n d l i n g a n d i n s t a l l a t i o n p r o c e d u r e s c a n c a u s e d a m a g e .

E S D d a m a g e c a n r a n g e f r o m s u b t l e p e r f o r m a n c e d e g r a d a t i o n t o c o m p l e t e d e v i c e f a i l u r e . P r e c i s i o n i n t e g r a t e d c i r c u i t s m a y b e m o r e s u s c e p t i b l e t o d a m a g e b e c a u s e v e r y s m a l l p a r a m e t r i c c h a n g e s c o u l d c a u s e t h e d e v i c e n o t t o m e e t i t s p u b l i s h e d s p e c i f i c a t i o n s .

P A C K A G E / O R D E R I N G I N F O R M A T I O N

S P E C I F I E D P A C K A G E P A C K A G E O R D E R I N G T R A N S P O R T

P R O D U C T P A C K A G E - L E A D T E M P E R A T U R E D E S I G N A T O R ( 1 ) M A R K I N G N U M B E R M E D I A , Q U A N T I T Y

R A N G E

T P S 3 5 1 4 D R a i l s , 5 0 S O - 1 4 D

T P S 3 5 1 4 4 0 ° C t o + 8 5 ° C T P S 3 5 1 4 T P S 3 5 1 4 D R T a p e a n d R e e l , 2 5 0 0

D I P - 1 4 N T P S 3 5 1 4 N R a i l s , 2 5

( 1 ) F o r t h e m o s t c u r r e n t p a c k a g e a n d o r d e r i n g i n f o r m a t i o n s e e t h e P a c k a g e O p t i o n A d d e n d u m a t t h e e n d o f t h i s d o c u m e n t , o r s e e t h e T I w e b s i t e a t w w w . t i . c o m .

o v e r o p e r a t i n g f r e e - a i r t e m p e r a t u r e r a n g e ( u n l e s s o t h e r w i s e n o t e d ) ( 1 ) ( 2 )

U N I T

S u p p l y V o l t a g e , V D D 1 6 V

V o l t a g e o n P S O N , I S 5 , I S 3 3 , P G I 8 V

V o l t a g e o n V S 3 3 , V S 5 1 6 V

V o l t a g e o n F P O 1 6 V

V o l t a g e o n P G O 8 V

A l l O t h e r P i n s – 0 . 3 V t o 1 6 V

C o n t i n u o u s T o t a l P o w e r D i s s i p a t i o n S e e D i s s i p a t i o n R a t i n g s T a b l e

O p e r a t i n g F r e e - A i r T e m p e r a t u r e R a n g e , T A – 4 0 ° C t o + 8 5 ° C

S t o r a g e T e m p e r a t u r e R a n g e , T s t g – 6 5 ° C t o + 1 5 0 ° C

S o l d e r i n g T e m p e r a t u r e 2 6 0 ° C

( 1 ) S t r e s s e s b e y o n d t h o s e l i s t e d u n d e r A b s o l u t e M a x i m u m R a t i n g s m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i c e . T h e s e a r e s t r e s s r a t i n g s

o n l y , a n d f u n c t i o n a l o p e r a t i o n o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d i t i o n s b e y o n d t h o s e i n d i c a t e d u n d e r R e c o m m e n d e d O p e r a t i n g C o n d i t i o n s i s n o t i m p l i e d . E x p o s u r e t o a b s o l u t e - m a x i m u m - r a t e d c o n d i t i o n s f o r e x t e n d e d p e r i o d s m a y a f f e c t d e v i c e r e l i a b i l i t y .

( 2 ) A l l v o l t a g e v a l u e s a r e w i t h r e s p e c t t o G N D .

2 S u b m i t D o c u m e n t a t i o n F e e d b a c k

http://www.go-dsp.com/forms/techdoc/doc_feedback.htm?litnum=SLVS422C&partnum=TPS3514

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P I N C O N F I G U R A T I O N

Top View SO, DIP

T P S 3 5 1 4


P I N A S S I G N M E N T S

P I N N A M E F U N C T I O N

3 F P O I n v e r t e d F a u l t P t o t e c t i o n o u t p u t . O p e n - d r a i n o u t p u t s t a g e . 2 G N D G r o u n d

5 I S 1 2 1 2 V O v e r - C u r r e n t P r o t e c t i o n I n p u t

8 I S 5 5 V O v e r - C u r r e n t P r o t e c t i o n I n p u t

9 I S 3 3 3 . 3 V O v e r - C u r r e n t P r o t e c t i o n I n p u t

7 N C N o I n t e r n a l C o n n e c t i o n

1 P G I P o w e r - G o o d I n p u t

1 4 P G O P o w e r - G o o d O u t p u t . O p e n - d r a i n o u t p u t s t a g e .

4 P S O N O n / O f f C o n t r o l I n p u t

6 R I O C P R e f e r e n c e S o u r c e

1 3 V D D S u p p l y V o l t a g e

1 0 V S 1 2 1 2 V O v e r - V o l t a g e / U n d e r - V o l t a g e P r o t e c t i o n I n p u t

1 1 V S 3 3 3 . 3 V O v e r - V o l t a g e / U n d e r - V o l t a g e P r o t e c t i o n I n p u t

1 2 V S 5 5 V O v e r - V o l t a g e / U n d e r - V o l t a g e P r o t e c t i o n I n p u t

F U N C T I O N T A B L E ( 1 )

U V C O N D I T I O N U V C O N D I T I O N 1 2 V P G I P S O N O V C O N D I T I O N S F P O ( 2 ) P G O ( 3 )

3 . 3 V / 5 V O C C O N D I T I O N S

< 0 . 9 V L N o N o N o L L

< 0 . 9 V L N o N o Y e s L L

< 0 . 9 V L N o Y e s N o H L

< 0 . 9 V L N o Y e s Y e s H L

< 0 . 9 V L Y e s N o N o L L

< 0 . 9 V L Y e s N o Y e s L L

< 0 . 9 V L Y e s Y e s N o H L

< 0 . 9 V L Y e s Y e s Y e s H L

> 1 . 2 V L N o N o N o L H

> 1 . 2 V L N o N o Y e s H L

> 1 . 2 V L N o Y e s N o H L

> 1 . 2 V L N o Y e s Y e s H L

> 1 . 2 V L Y e s N o N o H L

> 1 . 2 V L Y e s N o Y e s H L

> 1 . 2 V L Y e s Y e s N o H L

> 1 . 2 V L Y e s Y e s Y e s H L

x H x x x H L

( 1 ) x = D o n ’ t C a r e . ( 2 ) F o r F P O , L = F a u l t i s n o t l a t c h e d . H = F a u l t i s l a t c h e d . ( 3 ) F o r P G O , L = F a u l t . H = N o F a u l t .






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T I M I N G D I A G R A M S

38ms

PSON

On

300ms

PSON Off

PGO Off

2.3ms 300ms

OVP

Occurs

38ms300ms

VDD

(SB5V)

PSON

PFO

PGI

3.3V/5V

12V

PGO

OCP Occurs

300ms

3.3V or 5V Drop

300ms

38ms

300ms

12V UVP

Occurs

38ms

300ms

VDD

PSON

FPO

PGI

3.3V/5V

12V

PGO

T P S 3 5 1 4


F i g u r e 1 . A C T u r n - O n a n d O v e r - V o l t a g e P r o t e c t

F i g u r e 2 . O v e r - C u r r e n t a n d U n d e r - V o l t a g e D e t e c t / P r o t e c t








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S C H E M A T I C

_ + 73µs

Debounce

POR

R

S

_ +

_ +

_ +

_ +

_ +

_ +

2.3msDelay

75msDelay

38msDebounce

VDD

150µs

Debounce

300msDelay

VDD

Band-GapReference

1.153V

12V OV

5V OV

3.3V OV

3.3V UV

5V UV

PGI1

12V UV

_

+

Iref x 8

Iref x 8

Iref x 8

VS12

VDD

VS5

VS33

PGI

IS12

IS5

IS33

FPO

PSON

PGO

_

+

_

+

UVLO

150µs

Debounce

RII(REF) OCP Reference Source

T P S 3 5 1 4







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T Y P I C A L C H A R A C T E R I S T I C S

T P S 3 5 1 4


T A = + 2 5 ° C , u n l e s s o t h e r w i s e n o t e d .

S U P P L Y C U R R E N T I N P U T C U R R E N T ( P S O N ) v s v s

S U P P L Y V O L T A G E I N P U T V O L T A G E ( P S O N )

L O W - L E V E L O U T P U T V O L T A G E ( F P O ) L O W - L E V E L O U T P U T V O L T A G E ( F P O ) v s v s

L O W - L E V E L O U T P U T C U R R E N T ( F P O ) L O W - L E V E L O U T P U T C U R R E N T ( F P O )

L O W - L E V E L O U T P U T V O L T A G E ( P G O ) L O W - L E V E L O U T P U T V O L T A G E ( P G O ) v s v s

L O W - L E V E L O U T P U T C U R R E N T ( P G O ) L O W - L E V E L O U T P U T C U R R E N T ( P G O )






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D E T A I L E D D E S C R I P T I O N

P o w e r - G o o d a n d P o w e r - G o o d D e l a y

t2

t3

t5 t4

5V/3.3V

Output

PSON

PGO

On

Off

75%

10%

T P S 3 5 1 4


T Y P I C A L C H A R A C T E R I S T I C S ( c o n t i n u e d )

T A = + 2 5 ° C , u n l e s s o t h e r w i s e n o t e d .

N O R M A L I Z E D S E N S E T H R E S H O L D V O L T A G E C U R R E N T R A T I O v s v s

F R E E - A I R T E M P E R A T U R E A T V D D F R E E - A I R T E M P E R A T U R E

A l t h o u g h t h e r e i s n o r e q u i r e m e n t t o m e e t s p e c i f i c t i m i n g p a r a m e t e r s , t h e f o l l o w i n g s i g n a l t i m i n g s a r e r e c o m m e n d e d : A P C p o w e r s u p p l y i s c o m m o n l y d e s i g n e d t o p r o v i d e

a p o w e r - g o o d s i g n a l , w h i c h i s d e f i n e d b y t h e 2 m s ≤ t 2 ≤ 2 0 m s , 1 0 0 m s < t 3 < 2 0 0 0 m s , t 4 > c o m p u t e r m a n u f a c t u r e r s . P o w e r - G o o d O u t p u t ( P G O ) 1 m s , t 5 ≤ 1 0 m s i s a p o w e r - g o o d i n d i c a t o r a n d s h o u l d b e a s s e r t e d

F u r t h e r m o r e , m o t h e r b o a r d s s h o u l d b e d e s i g n e d t o h i g h b y t h e P C p o w e r s u p p l y t o i n d i c a t e t h a t t h e c o m p l y w i t h t h e a b o v e r e c o m m e n d e d t i m i n g . I f 5 V D C a n d 3 . 3 V D C o u t p u t s a r e a b o v e t h e t i m i n g s o t h e r t h a n t h e s e a r e i m p l e m e n t e d o r u n d e r - v o l t a g e t h r e s h o l d l i m i t . A t t h i s t i m e , t h e s u p p l y r e q u i r e d , t h i s i n f o r m a t i o n s h o u l d b e c l e a r l y s p e c i f i e d . s h o u l d b e a b l e t o p r o v i d e e n o u g h p o w e r t o a s s u r e

c o n t i n u o u s o p e r a t i o n w i t h i n t h e s p e c i f i c a t i o n . T h e T P S 3 5 1 4 f a m i l y o f p o w e r - s u p p l y s u p e r v i s o r s p r o v i d e s a P G O f o r t h e 3 . 3 V a n d 5 V s u p p l y v o l t a g e C o n v e r s e l y , w h e n e i t h e r t h e 5 V D C o r t h e 3 . 3 V D C

r a i l s a n d a s e p a r a t e P o w e r - G o o d I n p u t ( P G I ) . A n o u t p u t v o l t a g e s f a l l b e l o w t h e u n d e r - v o l t a g e i n t e r n a l t i m e r i s u s e d t o g e n e r a t e a 3 0 0 m s t h r e s h o l d , o r w h e n m a i n p o w e r h a s b e e n r e m o v e d p o w e r - g o o d d e l a y . f o r a s u f f i c i e n t l y l o n g t i m e s o t h a t p o w e r - s u p p l y

o p e r a t i o n i s n o l o n g e r a s s u r e d , P G O s h o u l d b e d e a s s e r t e d t o a l o w s t a t e . T h e p o w e r - g o o d , D C e n a b l e ( P S O N ) , a n d t h e 5 V / 3 . 3 V s u p p l y r a i l s a r e s h o w n i n F i g u r e 3 .

F i g u r e 3 . T i m i n g o f P S O N a n d P G O






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O v e r - C u r r e n t P r o t e c t i o n ( O C P )

P o w e r - S u p p l y R e m o t e O n / O f f ( P S O N ) A n d

O v e r - V o l t a g e P r o t e c t i o n ( O V P )

U n d e r - V o l t a g e P r o t e c t i o n ( U V P )

T P S 3 5 1 4


I f t h e v o l t a g e s i g n a l s a t P G I , V S 3 3 , a n d V S 5 r i s e a b o v e t h e u n d e r - v o l t a g e t h r e s h o l d , t h e o p e n - d r a i n

I n b r i d g e , o r f o r w a r d t y p e , o f f - l i n e s w i t c h i n g p o w e r P G O w i l l g o h i g h a f t e r a d e l a y o f 3 0 0 m s . W h e n t h e

s u p p l i e s , u s u a l l y d e s i g n e d f o r m e d i u m t o l a r g e P G I v o l t a g e o r a n y o f t h e 3 . 3 V / 5 V r a i l d r o p s b e l o w

p o w e r , t h e o v e r l o a d p r o t e c t i o n d e s i g n n e e d s t o b e t h e u n d e r - v o l t a g e t h r e s h o l d , P G O w i l l b e d i s a b l e d

v e r y p r e c i s e . M o s t o f t h e s e t y p e s o f p o w e r s u p p l i e s i m m e d i a t e l y .

s e n s e t h e o u t p u t c u r r e n t f o r a n o v e r l o a d c o n d i t i o n .

T h e t r i g g e r - p o i n t n e e d s t o b e s e t h i g h e r t h a n t h e m a x i m u m l o a d i n o r d e r t o p r e v e n t f a l s e t u r n - o n .

F a u l t P r o t e c t O u t p u t ( F P O ) T h e T P S 3 5 1 4 p r o v i d e s O v e r - C u r r e n t P r o t e c t i o n

S i n c e t h e l a t e s t p e r s o n a l c o m p u t e r g e n e r a t i o n ( O C P ) f o r t h e 3 . 3 V , 5 V , a n d 1 2 V r a i l s . W h e n a n

f o c u s e s o n e a s y t u r n - o n a n d p o w e r - s a v i n g f u n c t i o n s , o v e r - c u r r e n t c o n d i t i o n a p p e a r s a t t h e O C P

t h e P C p o w e r s u p p l y w i l l r e q u i r e t w o c h a r a c t e r i s t i c s . c o m p a r a t o r i n p u t p i n s f o r m o r e t h a n 7 3 µ s , t h e F P O

O n e i s a D C p o w e r - s u p p l y r e m o t e o n / o f f f u n c t i o n ; o u t p u t g o e s h i g h a n d P G O g o e s l o w . A l s o , t h i s f a u l t

t h e o t h e r i s s t a n d b y v o l t a g e t o a c h i e v e v e r y l o w c o n d i t i o n w i l l b e l a t c h e d u n t i l P S O N i s t o g g l e d f r o m

p o w e r c o n s u m p t i o n o f t h e P C s y s t e m . T h u s , l o w t o h i g h o r V D D i s r e m o v e d .

r e q u i r i n g t h e m a i n p o w e r s u p p l y t o b e s h u t d o w n . T h e r e s i s t o r c o n n e c t e d b e t w e e n t h e R I p i n a n d t h e

T h e p o w e r - s u p p l y r e m o t e o n / o f f ( P S O N ) i s a n G N D p i n w i l l c r e a t e a p r e c i s e I ( R E F ) f o r t h e O C P

a c t i v e - l o w s i g n a l t h a t t u r n s o n a l l o f t h e m a i n p o w e r f u n c t i o n . T h e f o r m u l a f o r c h o o s i n g t h e R I r e s i s t o r i s

r a i l s i n c l u d i n g t h e 3 . 3 V , 5 V , – 5 V , a n d – 1 2 V p o w e r V ( R I ) / I ( R E F ) . T h e I ( R E F ) r a n g e i s f r o m 1 2 . 5 µ A t o 6 2 . 5 µ A .

r a i l s . W h e n t h i s s i g n a l i s h e l d h i g h b y t h e P C T h r e e O C P c o m p a r a t o r s a n d t h e I ( R E F ) s e c t i o n a r e m o t h e r b o a r d o r l e f t o p e n - c i r c u i t e d , t h e s i g n a l o f t h e s u p p l i e d t h r o u g h t h e V 1 2 p i n . C u r r e n t d r a w n f r o m

F a u l t P r o t e c t O u t p u t ( F P O ) a l s o g o e s h i g h . I n t h i s t h e V S 1 2 p i n i s l e s s t h a n 1 m A .

c o n d i t i o n , t h e m a i n p o w e r r a i l s s h o u l d n o t d e l i v e r c u r r e n t a n d s h o u l d b e h e l d a t 0 V . F o l l o w i n g i s a n e x a m p l e o n c a l c u l a t i n g O C P f o r t h e

1 2 V r a i l : W h e n t h e F P O s i g n a l i s h e l d h i g h d u e t o a n

R I = V ( R I ) / I ( R E F ) = 1 . 1 5 V / 2 0 µ A = 5 6 k Ω o c c u r r i n g f a u l t c o n d i t i o n , t h e f a u l t s t a t u s w i l l b e I ( R E F ) • C • R ( I S 1 2 ) = R ( S E N S E ) ⋅ I ( O C P _ T R I P ) l a t c h e d a n d t h e o u t p u t s o f t h e m a i n p o w e r r a i l s

s h o u l d n o t d e l i v e r c u r r e n t a n d s h o u l d b e h e l d a t 0 V . I ( O C P _ T R I P ) = 2 0 µ A • 8 • 5 6 0 Ω / 0 . 0 1 Ω = 9 . 2 A T o g g l i n g P S O N f r o m l o w t o h i g h w i l l r e s e t t h e f a u l t C = C u r r e n t R a t i o ( t y p i c a l l y = 8 ) p r o t e c t i o n l a t c h . D u r i n g t h i s f a u l t c o n d i t i o n , o n l y t h e s t a n d b y p o w e r i s n o t a f f e c t e d .

W h e n P S O N g o e s f r o m h i g h t o l o w o r l o w t o h i g h , T h e O v e r - V o l t a g e P r o t e c t i o n ( O V P ) o f t h e T P S 3 5 1 4 t h e 3 8 m s d e b o u n c e b l o c k w i l l p r e v e n t a g l i t c h o n t h e m o n i t o r s 3 . 3 V , 5 V , a n d 1 2 V . W h e n a n o v e r - v o l t a g e i n p u t f r o m d i s a b l i n g / e n a b l i n g t h e F P O o u t p u t . D u r i n g c o n d i t i o n a p p e a r s a t o n e o f t h e 3 . 3 V , 5 V , o r 1 2 V t h e H I G H t o L O W t r a n s i t i o n , t h e u n d e r - v o l t a g e i n p u t p i n s f o r m o r e t h a n 7 3 µ s , t h e F P O o u t p u t g o e s f u n c t i o n i s d i s a b l e d t o p r e v e n t t u r n - o n f a i l u r e . h i g h a n d P G O g o e s l o w . A l s o , t h i s f a u l t c o n d i t i o n w i l l

b e l a t c h e d u n t i l P S O N i s t o g g l e d f r o m l o w - t o - h i g h o r P o w e r s h o u l d b e d e l i v e r e d t o t h e r a i l s o n l y i f t h e V D D i s r e m o v e d . P S O N s i g n a l i s h e l d a t g r o u n d p o t e n t i a l , t h u s , F P O i s

a c t i v e l o w . T h e F P O p i n c a n b e c o n n e c t e d t o 5 V D C D u r i n g f a u l t c o n d i t i o n s , m o s t p o w e r s u p p l i e s h a v e ( o r u p t o 1 5 V D C ) t h r o u g h a p u l l - u p r e s i s t o r . t h e p o t e n t i a l t o d e l i v e r h i g h e r o u t p u t v o l t a g e s t h a n

t h o s e n o r m a l l y s p e c i f i e d o r r e q u i r e d . I n u n p r o t e c t e d e q u i p m e n t , i t i s p o s s i b l e f o r o u t p u t v o l t a g e s t o b e h i g h e n o u g h t o c a u s e i n t e r n a l o r e x t e r n a l d a m a g e o f T h e T P S 3 5 1 4 p r o v i d e s U n d e r - V o l t a g e P r o t e c t i o n t h e s y s t e m . T o p r o t e c t t h e s y s t e m u n d e r t h e s e ( U V P ) f o r t h e 1 2 V r a i l a n d U n d e r - V o l t a g e D e t e c t a b n o r m a l c o n d i t i o n s , i t i s c o m m o n p r a c t i c e t o p r o v i d e ( U V D ) f o r t h e 3 . 3 V a n d 5 V r a i l s . W h e n a n

o v e r - v o l t a g e p r o t e c t i o n w i t h i n t h e p o w e r s u p p l y . u n d e r - v o l t a g e c o n d i t i o n a p p e a r s a t t h e V S 1 2 i n p u t p i n f o r m o r e t h a n 1 5 0 µ s , t h e F P O o u t p u t g o e s h i g h a n d P G O g o e s l o w . A l s o , t h i s f a u l t c o n d i t i o n w i l l b e l a t c h e d u n t i l P S O N i s t o g g l e d f r o m l o w t o h i g h o r V D D

i s r e m o v e d .

1 0 S u b m i t D o c u m e n t a t i o n F e e d b a c k





PACKAGE OPTION ADDENDUM

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Addendum-Page 2

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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.



TAPE AND REEL INFORMATION

*All dimensions are nominal

Device PackageType

PackageDrawing

Pins SPQ ReelDiameter

(mm)

ReelWidth

W1 (mm)

A0 (mm) B0 (mm) K0 (mm) P1(mm)

W(mm) Q

TPS3514DR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0

PACKAGE MATERIALS INFORMATION

www.ti.com 19-Mar-2008

Pack Materials-Page 1



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