поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

Preview PDF HTML

SC1403ITSTR датащи(PDF) 11 Page - Semtech Corporation

номер детали SC1403ITSTR
подробное описание детали  Mobile Multi-Output PWM Controller with Virtual Current SenseTM
PDF  30 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC1403ITSTR датащи(HTML) 11 Page - Semtech Corporation

Back Button SC1403ITSTR Datasheet HTML 7Page - Semtech Corporation SC1403ITSTR Datasheet HTML 8Page - Semtech Corporation SC1403ITSTR Datasheet HTML 9Page - Semtech Corporation SC1403ITSTR Datasheet HTML 10Page - Semtech Corporation SC1403ITSTR Datasheet HTML 11Page - Semtech Corporation SC1403ITSTR Datasheet HTML 12Page - Semtech Corporation SC1403ITSTR Datasheet HTML 13Page - Semtech Corporation SC1403ITSTR Datasheet HTML 14Page - Semtech Corporation SC1403ITSTR Datasheet HTML 15Page - Semtech Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 30 page
background image
11
 2002 Semtech Corp.
www.semtech.com
SC1403
POWER MANAGEMENT
PRELIMINARY
SC1403 Startup Sequence Chart
Design Guidelines
The schematic for the reference circuit is shown on page 24. The
reference circuit is configured as follows:
Switching Regulator 1
Vout1 = 3.3V @ 6A
Switching Regulator 2
Vout2 = 5.0V @ 6A
Linear Regulator
Vout3 = 5.0V @ 50mA
Designing the Output Filter
Before calculating the output filter inductance and output
capacitance, an acceptable amount of output ripple current is to
be determined. The maximum allowable ripple current depends
on the transient requirement of the power supply. Under normal
situation, the ripple current is usually set at 10 to 20% of the
maximum load. However, in order to speed up the output transient
response, ripple current can be much higher. In this design, we are
going to set the ripple current to be 40% of maximum load. So
once the ripple voltage specification is determined, the capacitor
ESR is chosen. The output ripple voltage is usually specified at +/
- 1% of the output voltage.
Functional Information (Cont.)
For the reference circuit 3.3V switcher, we selected a maximum
ripple voltage of 33mV. Choosing one 180uF, 4V Panasonic SP
Polymer Aluminum Electrolytic Cap, of which ESR is 15 Ω
m , sets
the maximum ripple current as follows:
Checking to see if the maximum RMS current can be met by the
SP cap.
Irms=0.635 A << Irms_rated=3.0A
The output inductance can now be found by:
Q
E
S3
N
O5
N
OT
E
S
E
RN
O
I
T
P
I
R
C
S
E
D
F
E
RW
O
LW
O
L.
S
P
M
S
V
3
.
3
s
w
o
ll
o
F
.f
f
o
s
S
P
M
S
h
t
o
B
.
e
d
o
m
l
o
r
t
n
o
c
t
r
a
t
s
t
n
a
d
n
e
p
e
d
n
I
F
E
RW
O
LH
G
I
H.
w
o
L.
F
F
O
S
P
M
S
V
3
.
3
,
N
O
S
P
M
S
V
5
F
E
RH
G
I
HW
O
L.
S
P
M
S
V
3
.
3
s
w
o
ll
o
F.
F
F
O
S
P
M
S
V
5
,
N
O
S
P
M
S
V
3
.
3
F
E
RH
G
I
HH
G
I
H.
S
P
M
S
V
3
.
3
s
w
o
ll
o
F.
n
o
s
S
P
M
S
h
t
o
B
D
N
GW
O
LX
.
w
o
L.f
f
o
s
S
P
M
S
h
t
o
B
D
N
GH
G
I
HW
O
L
/
H
G
I
He
r
a
s
t
u
p
t
u
o
h
t
o
b
r
e
tf
a
h
g
i
H
.
n
o
it
a
l
u
g
e
r
n
i
,
H
G
I
H
=
5
N
O
fI
.
h
g
i
h
s
e
o
g
3
N
O
n
e
h
w
s
t
r
a
t
s
V
5
.f
f
o
s
i
V
3
,
W
O
L
=
3
N
O
fI
.
n
o
s
i
V
3
L
VW
O
LX
.
w
o
L.f
f
o
s
S
P
M
S
h
t
o
B
L
VH
G
I
HW
O
L
/
H
G
I
He
r
a
s
t
u
p
t
u
o
h
t
o
b
r
e
tf
a
h
g
i
H
.
n
o
it
a
l
u
g
e
r
n
i
,
H
G
I
H
=
5
N
O
fI
.
h
g
i
h
s
e
o
g
3
N
O
n
e
h
w
s
t
r
a
t
s
V
3
.f
f
o
s
i
V
5
,
W
O
L
=
3
N
O
fI
.
n
o
s
i
V
5
Applications Information
3
I
I
I
I
I
2
2
2
1
2
1
RMS
+
⋅
+
=
O
S
NOM
O
NOM
_
IN
O
I
T
D
)
V
V
(
L
∆
⋅
⋅
−
=
ESR
V
I
MAX
_
O
O
∆
=
∆
A
2
.
2
015
.
0
V
033
.
0
IO
=
Ω
=
∆
2
I
I
O
1
∆
−
=
2
I
I
O
2
∆
+
=



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30


датащи скачать

Go To PDF Page


ссылки URL



Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   Ссылка на техническое описание    |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com