EN 73
3139 785 30981
8.
Circuit- and IC description
PIN
DESCRIPTION
T
ERM
INA
L
NO
.
I
/
O
DESCR
I
P
TION
NA
ME
D
O
R P
I
/
O
DESCR
I
P
TION
T
PS2041
T
PS2051
EN
4
–
I
E
na
b
le inpu
t
. L
o
gic l
o
w
t
u
r
ns
o
n p
o
we
r
swi
t
ch.
EN
–
4
I
E
na
b
le inpu
t
. L
o
gic high
t
u
r
ns
o
n p
o
we
r
swi
t
ch.
G
ND
1
1
I
G
ro
und
IN
2
, 3
2
, 3
I
I
npu
t
v
o
l
t
age
OC
5
5
O
O
ve
r
cu
rr
en
t
. L
o
gic
o
u
t
pu
t
ac
t
ive l
o
w
OUT
6, 7, 8
6, 7, 8
O
Po
we
r-
swi
t
ch
o
u
t
pu
t
IC7521 - 2A Switch Step Down Switching Regulator
PIN DESCRIPTION AND CONFIGURATION
P
IN
C
ONN
EC
TION
P
IN
DESCR
I
P
TION
N
°
P
i
n
F
unct
io
n
1
OUT
R
egula
tor
O
u
t
pu
t
.
2
,3,6,7
G
ND
G
ro
und.
4
CO
M
P
E/A
o
u
t
pu
t
f
or
f
r
equency c
o
mpensa
t
i
o
n.
5
FB
F
eed
b
ack inpu
t
.
Co
nnec
t
ing di
r
ec
t
ly
to
t
his pin
r
esul
t
s in an
o
u
t
pu
t
v
o
l
t
age
o
f 1.
2
3
V
.
A
n ex
t
e
r
nal
r
esis
t
ive divide
r
is
r
equi
r
ed f
or
highe
r
o
u
t
pu
t
v
o
l
t
ages.
8
VCC
U
n
r
egula
t
ed
DC
inpu
t
v
o
l
t
age.
OUT
G
ND
G
ND
CO
M
P
1
3
2
4
VCC
G
ND
G
ND
FB
8
7
6
5
D
0
2IN
1367