CAT37 CATALYST [Catalyst Semiconductor], CAT37 Datasheet - Page 2

• Manufacturer Part Number: CAT37
• Description: CMOS White LED Driver Boost Converter
• Manufacturer: CATALYST [Catalyst Semiconductor]

GND
SW
Doc. No. 5005, Rev. R
C
FB
C
A
P
A
T
a
C
T
1mm maximum height
3
t r
3
A
—
1
2
3
4
5
7
1
2
3
7
T
N
R
E
3
5-Lead SOT-23
u
D
K
7
m
4
K
T
[Free Air]
T -
CAT37
I D
b
T -
r e
E
E
1
7
3
5
4
VIN
SHDN
8
p -
- 5
- 5
8
5
6
4
2
1
a
e l
e l
d
a
a
L
P
T
, d
, d
e
a
D
a
c
h t
h t
F
d
k
N
n i
n i
Power
SHDN
a
F
GND
g
e r
3 (
S
S
VIN
NC
e
O
O
e
x
3
T
T
m
2
2
1
2
3
4
3
3
m
Ground
)
Power
SHDN
GND
VIN
SW
FB
2
Q
Switch pin. This is the drain of the internal power
switch. For minimum EMI, minimize the trace
area connected to this pin.
Ground pin. Connect pin 2 to ground.
LED (cathode) connection pin.
Shutdown pin.
Input supply pin. This pin should be bypassed
with a capacitor to ground. A 1 F capacitor
mounted close to the pin is recommended.
Power Ground
u
T
1
a
u
—
—
2
n
b
8
7
6
5
0
i t
e
SW
NC
FB
GND
y t
Q
u
R
3
T
a
0
—
e
B
n
0
l e
D
i t
0
y t
M
a
P
k r
C
a
n i
c
C
L
B
k
g
E
M
F
a
W
C
g
e
o
d
e