LTC3531-3 Linear Technology, LTC3531-3 Datasheet - Page 13

• Manufacturer Part Number: LTC3531-3
• Description: Buck-Boost Synchronous DC/DC Converters
• Manufacturer: Linear Technology

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TYPICAL APPLICATIO S
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
3531f