LTC3406B-1.8 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC3406B-1.8' PDF : 16 Pages View PDF
LTC3406B
APPLICATIO S I FOR ATIO
For the feedback resistors, choose R1 = 316k. R2 can
then be calculated from equation (2) to be:
R2 =
⎛ VOUT
⎝⎜ 0.6
⎞
− 1⎠⎟ R1= 1000k
VIN
2.7V
TO 4.2V
CIN†
4.7µF
CER
4
VIN
3
SW
LTC3406B
1
RUN
5
VFB
GND
2
2.2µH*
22pF
1M
316k
3406B F07a
*MURATA LQH32CN2R2M33
** TAIYO YUDEN JHK316BJ106ML
† TAIYO YUDEN JMK212BJ475MG
Figure 7a
VOUT
2.5V
COUT**
10µF
CER
Figure 7 shows the complete circuit along with its effi-
ciency curve.
100
VOUT = 2.5V
90
80
VIN = 2.7V
70
VIN = 4.2V
60
50
40
30
20
VIN = 3.6V
10
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
3406B F07b
Figure 7b
TYPICAL APPLICATIO S
VIN
2.7V
TO 4.2V
Single Li-Ion 1.5V/600mA Regulator for
High Efficiency and Small Footprint
CIN**
4.7µF
CER
4
VIN
3
SW
LTC3406B-1.5
1
RUN
5
VOUT
2.2µH*
COUT1†
10µF
CER
VOUT
1.5V
GND
3406B TA05
2
*MURATA LQH32CN2R2M33
**TAIYO YUDEN CERAMIC JMK212BJ475MG
†TAIYO YUDEN CERAMIC JMK316BJ106ML
Load Step
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
VIN = 3.6V
20µs/DIV
VOUT = 1.5V
ILOAD = 0mA TO 600mA
3406B TA07
Efficiency vs Output Current
100
VOUT = 1.5V
90
VIN = 2.7V
80
70
VIN = 3.6V
60
50
VIN = 4.2V
40
30
20
10
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
3406B TA06
Load Step
VOUT
100mV/DIV
AC COUPLED
IL
500mA/DIV
ILOAD
500mA/DIV
VIN = 3.6V
20µs/DIV
VOUT = 1.5V
ILOAD = 200mA TO 600mA
3406B TA08
3406bfa
13
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