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LTC3406B Datasheet(PDF) 13 Page - Linear Technology

Part # LTC3406B
Description  1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3406B Datasheet(HTML) 13 Page - Linear Technology

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LTC3406B
3406bfa
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
†
4.7µF
CER
VIN
2.7V
TO 4.2V
LTC3406B
RUN
3
2.2µH*
22pF
1M
316k
3406B F07a
5
4
1
2
SW
VFB
GND
COUT**
10µF
CER
VOUT
2.5V
* MURATA LQH32CN2R2M33
** TAIYO YUDEN JHK316BJ106ML
† TAIYO YUDEN JMK212BJ475MG
Figure 7a
Figure 7b
Figure 7 shows the complete circuit along with its effi-
ciency curve.
OUTPUT CURRENT (mA)
0.1
10
1000
100
90
80
70
60
50
40
30
20
10
3406B F07b
1
100
VOUT = 2.5V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
TYPICAL APPLICATIO S
VIN
CIN**
4.7µF
CER
VIN
2.7V
TO 4.2V
LTC3406B-1.5
RUN
3
2.2µH*
3406B TA05
5
4
1
2
SW
VOUT
GND
COUT1
†
10µF
CER
VOUT
1.5V
*
**
†
MURATA LQH32CN2R2M33
TAIYO YUDEN CERAMIC JMK212BJ475MG
TAIYO YUDEN CERAMIC JMK316BJ106ML
OUTPUT CURRENT (mA)
0.1
10
1000
100
90
80
70
60
50
40
30
20
10
3406B TA06
1
100
VOUT = 1.5V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
20µs/DIV
VIN = 3.6V
VOUT = 1.5V
ILOAD = 200mA TO 600mA
3406B TA08
Efficiency vs Output Current
Load Step
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
20µs/DIV
VIN = 3.6V
VOUT = 1.5V
ILOAD = 0mA TO 600mA
3406B TA07
Load Step
Single Li-Ion 1.5V/600mA Regulator for
High Efficiency and Small Footprint



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