Datasheet

LTC3112
25
3112fc
For more information www.linear.com/LTC3112
Typical applicaTions
1,2 or 3 Li-Ion to 5V
0.1µF
680pF
V
IN
2.7V
TO 15V
V
OUT
2.2µH
0.1µF
33k
845k
158k
47pF
47µF
1µF
10k
42.2k100pF
TO ADC
1V PER AMP
ONOFF
SW1
BST1
V
IN
V
CC
RUN
GND
PWM/SYNC
SW2
BST2
V
OUT
COMP
I
OUT
OVP
FB
LTC3112
V
OUT
5V/2A
V
IN
> 5V
22µF
3112 TA04
1.5MHz CLOCK
OPTIONAL
22pF
LTC3112 Synchronized to 1.5MHz Clock, 5V/2A Output
3112 TA04a
SW1
5V/DIV
SW2
5V/DIV
PWM/SYNC
5VDIV
INDUCTOR
CURRENT
1A/DIV
200ns/DIV
0.1µF
680pF
22pF
V
IN
3V
TO 12.6V
4.7µH
0.1µF
33k
845k
158k
47pF
47µF
1µF
10k
42.2k
100pF
TO ADC 1V PER AMP
ONOFF
PWMBURST
SW1
BST1
V
IN
V
CC
RUN
GND
PWM/SYNC
SW2
BST2
V
OUT
COMP
I
OUT
OVP
FB
LTC3112
V
OUT
5V/1.5A
V
IN
> 4V
10µF
+
–
1-3 CELL
Li-ION
3112 TA03
LOAD CURRENT (A)
0.0001
EFFICIENCY (%)
100
70
80
50
60
90
30
40
0.01 10.1
3112 TA03a
0.001
PWM
BURST
3.6V
IN
7.2V
IN
10.8V
IN