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参数资料
| 型号： | LTC3410ESC6-1.2 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.63 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | PLASTIC, MO-203AB, SC-70, 6 PIN |
| 文件页数： | 5/16页 |
| 文件大小： | 326K |
| 代理商： | LTC3410ESC6-1.2 |
13
LTC3410
3410fb
APPLICATIO S I FOR ATIO
WU
UU
Figure 6a
Figure 6b
Figure 6c
ILOAD (mA)
0.1
0
10
20
30
40
EFFICIENCY
(%)
50
60
70
80
90
100
10
100
1
1000
3410 F06b
VIN = 3.6V
VIN = 4.2V
VOUT
100mV/DIV
AC COUPLED
IL
200mA/DIV
ILOAD
200mA/DIV
20
s/DIV
3410 F06c
VIN = 3.6V
VOUT = 3V
ILOAD = 100mA TO 300mA
Substituting VOUT = 3V, VIN = 4.2V, IL = 100mA
and f = 2.25MHz in Equation (3) gives:
L
V
MHz
mA
V
H
=
=
3
2 25
100
1
3
42
38
.(
)
.
A 4.7
H inductor works well for this application. For best
efficiency choose a 350mA or greater inductor with less
than 0.3
series resistance.
CIN will require an RMS current rating of at least 0.125A
ILOAD(MAX)/2 at temperature and COUT will require an ESR
of less than 0.5
. In most cases, a ceramic capacitor will
satisfy this requirement. From Table 2, Capacitance Selec-
tion, COUT = 10F and CIN = 4.7F.
For the feedback resistors, choose R1 = 301k. R2 can
then be calculated from equation (2) to be:
R
V
R
k use
k
OUT
2
08
1 1 827 8
825
=
=
.
.;
Figure 6 shows the complete circuit along with its
efficiency curve.
VIN
CIN
4.7
F
CER
VIN
2.7V
TO 4.2V
LTC3410
RUN
3
4.7
H*
10pF
825k
301k
3410 F06a
6
4
1
2, 5
SW
VFB
GND
COUT
10
F
CER
VOUT
3V
TAIYO YUDEN JMK212BJ106
TAIYO YUDEN JMK212BJ475
*MURATA LQH32CN4R7M23
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