LTC3531 Datasheet, PDF (13/16 Pages) Linear Technology – 200mA Buck-Boost Synchronous DC/DC Converters

LTC3531/
LTC3531-3.3/LTC3531-3
TYPICAL APPLICATIO
5V/Li-Ion to 3.3V with ThinSOT (3.3V Version)
V_IN
3.1V TO
5V
+
5V/Li-Ion _–
10μH
SW1 SW2
V_IN
V_OUT
LTC3531-3.3
2.2μF
SHDN GND
ON OFF
V_OUT
3.3V
160mA
10μF
3531 TA02a
95
90
85
80
75
70
65
0.1
100
4.4V_IN
5V_IN
10
3.6V_IN
3.1V_IN
1
POWER LOSS AT 3.6V_IN
1
10
100
LOAD CURRENT (mA)
0.1
1000
3531 TA02b
2 AA Alkaline to 3V with ThinSOT (3V Version)
V_IN
1.8V TO
3.2V
+
2 x AA ^–
ALKALINE ₊
–
10μH
SW1 SW2
V_IN
V_OUT
LTC3531-3
2.2μF
SHDN GND
ON OFF
V_OUT
3V
80mA
10μF
3531 TA03a
90
100
85
80 _2.5VIN
10
3.2V_IN
75
1.8V_IN
70
1
POWER LOSS AT 3.2V_IN
65
60
0.1
1
10
100
LOAD CURRENT (mA)
0.1
1000
3531 TA03b
USB to 5V with 3 × 3 DFN (Adjustable Version)
10μH
USB
4.35V TO
5.25V
4.7μF
1Ω
SW1 SW2
V_IN
V_OUT
LTC3531
2.2μF
FB
SHDN GND
ON OFF
R2
1M
R1
324k
V_OUT
5V
200mA
10μF
3531 TA04a
95
90
85
80
75
70
65
0.1
100
EFFICIENCY
10
POWER LOSS
1
1
10
100
LOAD CURRENT (mA)
0.1
1000
3531 TA04b
3531fb
13