CAT37 datasheet(2/13 Pages) CATALYST

Part #	CAT37

Description	CMOS White LED Driver Boost Converter

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Manufacturer	CATALYST [Catalyst Semiconductor]

Direct Link	http://www.catalyst-semiconductor.com

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2 / 13 page

CAT37

2

Doc. No. 5005, Rev. R

ORDERING INFORMATION

PIN CONFIGURATION

PIN DESCRIPTIONS

Pin Number

SOT23

TDFN

Name

Function

1

8

SW

Switch pin. This is the drain of the internal power

switch. For minimum EMI, minimize the trace

area connected to this pin.

2

5

GND

Ground pin. Connect pin 2 to ground.

3

6

FB

LED (cathode) connection pin.

44

SHDN

Shutdown pin.

5

2

VIN

Input supply pin. This pin should be bypassed

with a capacitor to ground. A 1

µF capacitor

mounted close to the pin is recommended.

—

1

Power

Power Ground

Ground

(Top View)

TDFN Package: 3mm x 3mm

0.8mm maximum height

(RD4)

CAT37

1

2

3

5

4

SW

GND

FB

VIN

SHDN

θ

5-Lead SOT-23

1mm maximum height

[Free Air]

1

2

3

4

8

7

6

5

SW

NC

FB

GND

Power

GND

VIN

NC

SHDN

r

e

b

m

u

N

t

r

a

Pe

g

a

k

c

a

P

e

b

u

T

y

t

i

t

n

a

u

Q

l

e

R

y

t

i

t

n

a

u

Q

e

g

a

k

c

a

P

e

d

o

C

g

n

i

k

r

a

M

7

E

T

-

K

E

7

3

T

A

C3

2

T

O

S

n

i

h

t

,

d

a

e

l

-

5

—

0

3F

B

3

1

E

T

-

4

D

R

7

3

T

A

C)

m

3

x

3

(

N

F

D

T

d

a

p

-

80

2

1D

B

TW

E

C

I

D

T

7

3

T

A

C

3

2

T

O

S

n

i

h

t

,

d

a

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l

-

5

e

r

F

d

a

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L

——

M

L

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