LTC3112_15 Datasheet, PDF (25/32 Pages) Linear Technology – 15V, 2.5A Synchronous Buck-Boost DC/DC Converter

Typical Applications
1,2 or 3 Li-Ion to 5V
LTC3112
V_IN 3V
TO 12.6V
+
1-3 CELL
Li-ION
–
4.7µH
0.1µF
SW1
SW2
BST1
V_IN
V_CC
BURST PWM
LTC3112
BST2
V_OUT
COMP
PWM/SYNC
FB
10µF ^{OFF ON} RUN
I_OUT
1µF
GND
OVP
0.1µF
680pF ^33k
22pF
845k
47pF
TO ADC 1V PER AMP
10k
100pF
42.2k 158k
V_OUT
5V/1.5A
V_IN > 4V
47µF
3112 TA03
100
90
BURST
80
70
60
PWM
50
40
30
0.0001 0.001 0.01 0.1
LOAD CURRENT (A)
3.6V_IN
7.2V_IN
10.8V_IN
1
3112 TA03a
LTC3112 Synchronized to 1.5MHz Clock, 5V/2A Output
2.2µH
V_IN 2.7V
TO 15V
V_OUT
0.1µF
OPTIONAL
22µF
OFF ON
1µF
SW1
BST1
V_IN
V_CC
LTC3112
SW2
BST2
V_OUT
COMP
PWM/SYNC
FB
RUN
I_OUT
GND
OVP
1.5MHz CLOCK
0.1µF
680pF ^33k
845k
22pF
100pF
TO ADC
1V PER AMP
42.2k
158k
47pF
10k
V_OUT
5V/2A
V_IN > 5V
47µF
3112 TA04
SW1
5V/DIV
SW2
5V/DIV
INDUCTOR
CURRENT
1A/DIV
PWM/SYNC
5VDIV
200ns/DIV
3112 TA04a
For more information www.linear.com/LTC3112
3112fc
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