Datasheet

LTC3441
13
3441fa
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
LTC3441
C1
10μF
*1 = Burst Mode OPERATION
0 = FIXED FREQUENCY
C1: TAIYO YUDEN JMK212BJ106MG
C2: TAIYO YUDEN JMK325BJ226MM
D1, D2: ON SEMICONDUCTOR MBRM120LT3
L1: TOKO A916CY-3R3M
2.8V TO 4.2V
Li-Ion
D2
*
R3 15k
R1
340k
C2
22μF
V
OUT
3.3V
1.2A
R2
200k
C4 1.5nF
3441 TA03a
L1
4.7μH
D1
I
OUT
(mA)
0.1
40
EFFICIENCY (%)
50
60
70
80
1 10 10000100 1000
3441 TA03b
30
20
10
0
90
100
4.2V
IN
PWM
4.2V
IN
BURST
3.6V
IN
PWM
2.8V
IN
PWM
Efficiency