SP6645 datasheet(7/15 Pages) SIPEX

Part #	SP6645

Description	Single/Dual Alkaline Cell, High Efficiency Boost DC-DC Regulator

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Manufacturer	SIPEX [Sipex Corporation]

Direct Link	http://www.sipex.com

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7 / 15 page

7

Rev:B Date 4/13/04

SP6644/6645 High Efficiency Boost Regulator

Figure 25. Shutdown Response and Inductor Current,

Vout=3.3V, Vbatt=1.3V, Rlim=2.5k, Rload=550 Ohms,

Li=22uH Sumida CD43

Table 1. SP6644/6645 Pin Descriptions

Figure 26. Pinout for the SP6644/6645

Refer to the circuit in

Figure 28, T

AMB = +25

oC, unless otherwise noted.

VOUT

GND

RLIM

VBATT

LX

1

2

3

4

5

6

7

8

SP6644

SP6645

SHDN

FB

BATTLO

E

M

A

NN

O

I

T

C

N

U

F.

O

N

I

P

V

T

A

B

.

r

o

t

a

r

a

p

m

o

c

O

L

T

A

B

e

h

t

f

o

t

u

p

n

i

r

o

s

n

e

s

e

h

t

o

t

s

e

i

t

n

i

p

s

i

h

T

.

y

l

p

u

S

y

r

e

t

a

B

1

O

L

T

A

B

e

h

t

r

o

f

V

1

w

o

l

e

b

s

p

o

r

d

e

g

a

t

l

o

v

e

h

t

n

e

h

W

.

t

u

p

t

u

O

w

o

L

y

r

e

t

a

B

n

i

a

r

D

-

n

e

p

O

4

6

P

S

r

o

e

h

t

r

o

f

V

2

5

4

6

P

S

.

t

n

e

r

u

c

s

k

n

i

s

O

L

T

A

B

,

2

R

M

I

L

o

t

n

i

p

s

i

h

t

m

o

r

f

r

o

t

s

i

s

e

r

a

g

n

i

t

c

e

n

o

C

.

t

n

e

r

u

C

k

a

e

P

r

o

t

c

u

d

n

I

e

l

b

a

m

a

r

g

o

r

P

r

o

t

s

i

s

e

R

e

r

e

h

w

t

n

e

r

u

c

k

a

e

p

r

o

t

c

u

d

n

i

e

h

t

s

m

a

r

g

o

r

p

d

n

u

o

r

g

3

N

D

H

SV

o

t

c

e

n

o

C

.

t

u

p

n

I

n

w

o

d

t

u

h

S

W

O

L

-

e

v

i

t

c

A

T

A

B

.

n

o

i

t

a

r

e

p

o

l

a

m

r

o

n

r

o

f4

B

F

n

a

o

t

n

i

p

t

u

p

n

i

s

i

h

t

c

e

n

o

C

.

n

o

i

t

a

r

e

p

o

t

u

p

t

u

o

-

e

l

b

a

t

s

u

j

d

a

r

o

f

t

u

p

n

I

.

t

u

p

n

I

k

c

a

b

d

e

F

V

n

e

w

t

e

b

r

e

d

i

v

i

d

e

g

a

t

l

o

v

r

o

t

s

i

s

e

r

l

a

n

r

e

t

x

e

T

U

O

-

d

e

x

i

f

r

o

f

D

N

G

o

t

c

e

n

o

C

.

D

N

G

d

n

a

.

n

o

i

t

a

r

e

p

o

t

u

p

t

u

o

5

D

N

G.

d

n

u

o

r

g

y

ll

a

c

i

p

y

t

,

l

a

i

t

n

e

t

o

p

t

i

u

c

r

i

c

t

s

e

w

o

l

e

h

t

o

t

c

e

n

o

C

6

X

L

V

m

o

r

f

d

e

t

c

e

n

o

c

s

i

r

o

t

c

u

d

n

i

n

A

.

li

o

C

T

A

B

d

n

a

n

i

a

r

d

h

c

t

i

w

s

T

E

F

S

O

M

l

e

n

a

h

C

-

N

e

h

t

o

t

.

n

i

p

s

i

h

t

h

g

u

o

r

h

t

n

i

a

r

d

r

e

i

f

i

t

c

e

r

-

s

u

o

n

o

r

h

c

n

y

s

l

e

n

a

h

C

-

P

e

h

t

7

V

T

U

O

t

c

e

n

o

C

.

t

u

p

n

i

r

e

w

o

p

C

I

d

n

a

n

o

i

t

a

r

e

p

o

V

3

.

3

d

e

x

i

f

r

o

f

t

u

p

n

i

k

c

a

b

d

e

F

.

t

u

p

t

u

O

r

e

w

o

P

V

o

t

e

s

o

l

c

r

o

t

i

c

a

p

a

c

r

e

t

li

f

T

U

O

.

8

I

PEAK =

1400

R

LIM

SDN

2V/div

Li

0.5A/div

V

OUT, VBATT

1V/div

PERFORMANCE CHARACTERISTICS

PIN DESCRIPTION

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