LTC3531 LINER [Linear Technology], LTC3531 Datasheet - Page 13

• Manufacturer Part Number: LTC3531
• Description: 200mA Buck-Boost Synchronous DC/DC Converters
• Manufacturer: LINER [Linear Technology]

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