Datasheet

LTC3529
10
3529fb
20ms/DIV
3529 TA02b
V
OUT
5V/DIV
LOAD
CURRENT
1A/DIV
FAULT
2V/DIV
20ms/DIV
3529 TA02c
V
OUT
5V/DIV
LOAD
CURRENT
1A/DIV
FAULT
2V/DIV
TYPICAL APPLICATIONS
2 Alkaline Cells to 5V at 350mA 2 Alkaline Cells to 5V Effi ciency
3529 TA03a
LTC3529
V
IN
SW
C
IN
3.3μF
2-CELL
ALKALINE
1.8V
TO
3.2V
V
OUT
, 5V
270Ω
L1*
4.7μH
*L1: SUMIDA CDRH5D16NP
FAULT SNSGND
RST V
OUT
SHDN PGND
C
OUT
6.8μF
ONOFFAUTO-RESTART
ONOFF
+
Li-Ion Battery to 5V at 100mA or 500mA for USB OTG Host Supply
3529 TA02a
LTC3529
V
IN
SW
V
OUT
, 5V
1.8V
1M
L1*
4.7μH
*L1: SUMIDA CDRH5D16NP
FAULT SNSGND
RST V
OUT
SHDN PGND
C
OUT
6.8μF
ONOFFAUTO-RESTART
ONOFF
3.3μF
TO μP
Li-Ion
2.5V
TO
4.2V
+
Overcurrent Event
V
RST
High
Overcurrent Event
V
RST
Low
LOAD CURRENT (mA)
1 100010010
3529 TA03b
V
IN
= 3V
V
IN
= 1.8V
V
IN
= 3V
V
IN
= 1.8V
C
OUT
= 6.8μF
INDUCTOR = 4.7μH,
COOPER BUSSMANN SD25-4R7
POWER LOSS (W)
0.7
0.6
0
0.5
0.4
0.3
0.2
0.1
POWER LOSS
EFFICIENCY
EFFICIENCY (%)
100
90
80
70
0
10
20
30
60
50
40