Datasheet

13
LTC3405A
3405afa
Figure 7a
Figure 7b
V
IN
C
IN
†
2.2µF
CER
V
IN
2.7V
TO 4.2V
LTC3405A
RUN
MODE
3
6.8µH*
22pF
887k
412k
3405A F07a
5
4
6
1
2
SW
V
FB
GND
C
OUT
**
4.7µF
CER
V
OUT
2.5V
*SUMIDA CMD4D11-6R8MC
** TAIYO YUDEN JMK212BJ475MG
†
TAIYO YUDEN LMK212BJ225MG
OUTPUT CURRENT (mA)
0.1
EFFICIENCY (%)
10
1000
100
90
80
70
60
50
40
30
3405A F07b
1 100
V
IN
= 2.7V
V
IN
= 4.2V
V
IN
= 3.6V
APPLICATIO S I FOR ATIO
WUUU
V
OUT
100mV/DIV
AC COUPLED
I
LOAD
200mA/DIV
I
L
200mA/DIV
20µs/DIV
V
IN
= 3.6V
V
OUT
= 2.5V
I
LOAD
=
100mA TO 300mA
3405A F07c
Figure 7c