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LTC1475 Datasheet(PDF) 13 Page - Linear Technology

No. de pieza LTC1475
Descripción Electrónicos  1.5MHz, 600mA Synchronous Step-Down egulator in ThinSOT
PDF  16 Pages
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Fabricante Electrónico  LINER [Linear Technology]
Página de inicio  http://www.linear.com
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LTC1475 Datasheet(HTML) 13 Page - Linear Technology

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LTC3406
LTC3406-1.5/LTC3406-1.8
3406fa
APPLICATIO S I FOR ATIO
For the feedback resistors, choose R1 = 316k. R2 can
then be calculated from equation (2) to be:
R
V
Rk
OUT
2
06
1
1 1000
=
−
⎛
⎝
⎜
⎞
⎠
⎟
=
.
VIN
CIN
†
2.2µF
CER
VIN
2.7V
TO 4.2V
LTC3406
RUN
3
2.2µH*
22pF
1M
316k
3406 F07a
5
4
1
2
SW
VFB
GND
COUT**
10µF
CER
VOUT
2.5V
* MURATA LQH32CN2R2M33
** TAIYO YUDEN JMK316BJ106ML
† TAIYO YUDEN LMK212BJ225MG
Figure 7a
Figure 7b
Figure 7 shows the complete circuit along with its effi-
ciency curve.
OUTPUT CURRENT (mA)
70
80
85
95
100
0.1
10
100
1000
3406 F07b
60
1
90
75
65
VOUT = 2.5V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
TYPICAL APPLICATIO S
Single Li-Ion 1.5V/600mA Regulator for
High Efficiency and Small Footprint
VIN
CIN**
4.7µF
CER
VIN
2.7V
TO 4.2V
LTC3406-1.5
RUN
3
2.2µH*
3406 TA05
5
4
1
2
SW
VOUT
GND
COUT1
†
10µF
CER
VOUT
1.5V
*
**
†
MURATA LQH32CN2R2M33
TAIYO YUDEN JMK212BJ475MG
TAIYO YUDEN JMK316BJ106ML
OUTPUT CURRENT (mA)
70
80
90
95
0.1
10
100
1000
3406 TA06
60
1
85
75
65
VOUT = 1.5V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
IL
500mA/DIV
ILOAD
500mA/DIV
VOUT
100mV/DIV
AC COUPLED
20µs/DIV
VIN = 3.6V
VOUT = 1.5V
ILOAD = 0A TO 600mA
3406 TA07
IL
500mA/DIV
ILOAD
500mA/DIV
VOUT
100mV/DIV
AC COUPLED
20µs/DIV
VIN = 3.6V
VOUT = 1.5V
ILOAD = 200mA TO 600mA
3406 TA08



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