LTC3112_15 Datasheet, PDF (27/32 Pages) Linear Technology – 15V, 2.5A Synchronous Buck-Boost DC/DC Converter

LTC3112
Typical Applications
Stepped Response from 1 or 2 Li-Ion to 12V Adapter Source with V_IN Feedforward Network
12V ADAPTER
1-OR 2-SERIES
Li-ION CELLS
V_IN
V_OUT
LTC4352
IDEAL
DIODE
MBR735 ^0.1µF
OPTIONAL
100µF
BURST PWM
1µF
OFF ON
4.7µH
SW1
BST1
V_IN
V_CC
LTC3112
SW2
BST2
V_OUT
COMP
PWM/SYNC
FB
RUN
I_OUT
GND
OVP
33pF
0.1µF
1000k
680pF ^33k
22pF
845k
1050k
47pF
V_OUT
5V/2.5A,
V_IN > 5V
100µF
TO ADC
10k
1V PER AMP
100pF 42.2k
158k
158k
100pF
3112 TA06
V_IN
5V/DIV
COMP
500mVDIV
V_OUT
2V/DIV
INPUT CURRENT
10A/DIV
Adapter Plug-In
100µs/DIV
3112 TA06a
V_IN
5V/DIV
COMP
500mVDIV
V_OUT
2V/DIV
INPUT CURRENT
1A/DIV
Adapter Disconnect
1ms/DIV
3112 TA06b
For more information www.linear.com/LTC3112
3112fc
27