Datasheet

LTC3499/LTC3499B
13
3499fc
TYPICAL APPLICATIONS
L
4.7µH
3499 F05a
LTC3499
SW
FB
GND
V
IN
V
OUT
SHDN
VC
SS
C
OUT
10µF
×5R
V
OUT
5V
175mA
V
IN
2 AA CELLS
1.8V TO 3.2V
1M
324k
0.01µF330pF
100k
C
IN
2.2µF
×5R
+
C
IN
: TAIYO YUDEN X5R JMK212BJ225MD
C
OUT
: TAIYO YUDEN X5R JMK212BJ106MD
L: COILCRAFT MSS5131-472MLB
OFFON
Lithium-Ion to 5V, 350mA
Two Cells to 5V, 175mA
Lithium-Ion to 5V Efficiency
Two Cells to 5V Efficiency
L
4.7µH
3499 F04a
LTC3499
SW
FB
GND
V
IN
V
OUT
SHDN
VC
SS
OFFON
C
OUT
10µF
×5R
V
OUT
5V
350mA
C
IN
: TAIYO YUDEN X5R JMK212BJ225MD
C
OUT
: TAIYO YUDEN X5R JMK212BJ106MD
L: COILCRAFT MSS5131-472MLB
V
IN
Li-Ion
3.1V TO 4.2V
1M
324k
0.01µF330pF
100k
C
IN
2.2µF
×5R
+
LOAD CURRENT (mA)
0.1
70
80
100
100
3499 G03
60
50
1 10 1000
40
30
90
100
1000
100000
10
1
0.1
10000
EFFICIENCY (%)
POWER LOSS (mW)
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 3V
POWER LOSS
EFFICIENCY
LOAD CURRENT (mA)
0.1
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
90
100
0.1
1
10
100
1000
10000
100000
1 10 100 1000
3499 G01
V
IN
= 3.2V
V
IN
= 2.4V
V
IN
= 1.8V
POWER LOSS
EFFICIENCY