Datasheet

LTC3443
14
3443fa
TYPICAL APPLICATIO S
U
Li-Ion to 3.3V at 1.2A Converter
SW1
PV
IN
V
IN
SHDN/SS
MODE/SYNC
PGND
5
8
12
11
2
6
4
9
10
1
7
3
SW2
V
OUT
FB
V
C
GND
PGND
LTC3443
C1
10μF
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
D1, D2: PHILLIPS PMEG2010EA
L1: SUMIDA CDRH6D28-6R0NC
2.8V TO 4.2V
Li-Ion
D2
*
15k
340k
C2
44μF
(2 × 22μF)
V
OUT
3.3V
1.2A
200k
560pF
220pF
3443 TA03a
L1
6μH
D1
2.2k
Efficiency vs Load
I
OUT
(mA)
0.1
40
EFFICIENCY (%)
50
60
70
80
1 10 10000100 1000
3443 TA03b
30
20
10
0
90
100
Burst Mode
OPERATION
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.8V
WITH SCHOTTKY DIODES:
PHILIPS PMEG2010EA