LTC3115-2_15 Datasheet, PDF (33/42 Pages) Linear Technology – 40V, 2A Synchronous Buck-Boost DC/DC Converter

LTC3115-2
Typical Applications
Automotive 450kHz Regulator with 100k Maximum Resistor Value
2.7V TO
40V
C_BST1
0.1µF
L1
10µH
C_BST2
0.1µF
C_IN
10µF
BST1 SW1
PV_IN
V_IN
RUN
SW2 BST2
PV_OUT
LTC3115-2
VC
C_O
47µF × 2
R_FB
C_FB
33nF
13.7k
R_TOP
100k
100k
5V
1A V_IN > 4V
C_FF ^{2A VIN ≥ 6V}
330pF
R_FF
1.5k
RT
R_T
GND
80.6k
FB
PWM/SYNC
PV_CC
V_CC
PGND
1000pF
C1
4.7µF
R_BOT
24.9k
C_IN: AVX22205C106KAT2A
C_O: GRM43ER61A476KE19L
L1: WÜRTH 744 778910
31152 TA02a
Fast (10µs) Line Transient
from V_IN = 13.8V to 30V
INPUT VOLTAGE
(10V/DIV)
30V
13.8V
Fast (10µs) Line Transient
from V_IN = 4V to 13.8V
INPUT VOLTAGE
(5V/DIV)
4V
13.8V
V_OUT
(200mV/DIV)
500µs/DIV
31152 TA02b
0A to 800mA Load Step, V_IN = 3.6V
V_OUT
(100mV/DIV)
500µs/DIV
31152 TA02c
0A to 2A Load Step, V_IN = 13.8V
LOAD CURRENT
(500mA/DIV)
V_OUT
(200mV/DIV)
500µs/DIV
31152 TA02d
LOAD CURRENT
(1A/DIV)
V_OUT
(100mV/DIV)
For more information www.linear.com/LTC3115-2
500µs/DIV
31152 TA02e
31152fa
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