Datasheet

LTC3531/
LTC3531-3.3/LTC3531-3
13
3531fa
5V/Li-Ion to 3.3V with ThinSOT (3.3V Version)
2 AA Alkaline to 3V with ThinSOT (3V Version)
U
TYPICAL APPLICATIO
SW1 SW2
SHDN GND
V
IN
V
OUT
LTC3531-3.3
+
–
2.2µF10µF
5V/Li-Ion
ON OFF
10µH
V
OUT
3.3V
160mA
V
IN
3.1V TO
5V
3531 TA02a
LOAD CURRENT (mA)
75
EFFICIENCY (%)
85
95
70
80
90
0.1 10 100 1000
3531 TA02b
65
1
4.4V
IN
5V
IN
3.6V
IN
3.1V
IN
POWER LOSS AT 3.6V
IN
POWER LOSS (mW)
0.1
10
1
100
SW1 SW2
SHDN GND
V
IN
V
OUT
LTC3531-3
+
–
2.2µF10µF
+
–
2 x AA
ALKALINE
ON OFF
10µH
3531 TA03a
V
OUT
3V
80mA
V
IN
1.8V TO
3.2V
LOAD CURRENT (mA)
70
EFFICIENCY (%)
80
90
65
75
85
0.1 10 100 1000
3531 TA03b
60
1
2.5V
IN
3.2V
IN
POWER LOSS AT 3.2V
IN
1.8V
IN
POWER LOSS (mW)
0.1
10
1
100
SW1 SW2
SHDN GND
V
IN
V
OUT
FB
LTC3531
2.2µF
10µF
R2
1M
R1
324k
4.7µF
ON OFF
10µH
3531 TA04a
1Ω
V
OUT
5V
200mA
USB
4.35V TO
5.25V
LOAD CURRENT (mA)
75
EFFICIENCY (%)
POWER LOSS (mW)
85
95
70
80
90
0.1 10 100 1000
3531 TA04b
65 0.1
10
1
100
1
EFFICIENCY
POWER LOSS
USB to 5V with 3 × 3 DFN (Adjustable Version)