Datasheet

LTC3115-2
40
31152f
For more information www.linear.com/LTC3115-2
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
 LINEAR TECHNOLOGY CORPORATION 2013
LT 0813 • PRINTED IN USA
[phone]
●
FAX: [phone]
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www.linear.com/LTC3115-2
relaTeD parTs
Typical applicaTion
2MHz Automotive 5V Regulator with Cold Crank Capability
Cold Crank Line Transient
with 800mA Load
Fast (10µs) Cold Crank Line
Transient, V
IN
= 13.8V to 4V
Fast (10µs) Load Dump Line
Transient, V
IN
= 13.8V to 36V
BST1 BST2
PV
IN
V
IN
RUN
PWM/SYNC
PV
OUT
VC
FB
PV
CC
V
CC
RT
SW1 SW2
GND PGND
LTC3115-2
L1
3.3µH
C
BST1
0.1µF
C
BST2
0.1µF
AUTOMOTIVE
4V TO 40V
C
FF
100pF
C1
4.7µF
5V
800mA
C
IN
4.7µF
C
O
47µF × 2
R
TOP
100k
R
BOT
24.9k
C
O
: MURATA GRM43ER61A476
L1: COILCRAFT LPS5030-332ML
31152 TA08a
R
T
17.8k
R
FF
2k
R
FB
24.3k
C
FB
4700pF
BURST PWM
OFF ON
100k
1000pF
PART NUMBER DESCRIPTION COMMENTS
LTC3115-1 2A (I
OUT
), 40V Synchronous Buck-Boost Converter V
IN
: 2.7V to 40V, V
OUT
: 2.7V to 40V, I
Q
= 30µA, I
SD
< 3µA, DFN and
TSSOP Packages
LTC3112 2.5A (I
OUT
), 15V Synchronous Buck-Boost DC/DC Converter V
IN
: 2.7V to 15V, V
OUT
: 2.5V to 14V, I
Q
= 40µA, I
SD
< 1µA, DFN and
TSSOP Packages
LTC3113 3A (I
OUT
), 2MHz Synchronous Buck-Boost DC/DC Converter V
IN
: 1.8V to 5.5V, V
OUT
: 1.8V to 5.25V, I
Q
= 30µA, ISD < 1µA, DFN
and TSSOP Packages
LTC3127 1A (I
OUT
), 1.2MHz Buck-Boost DC/DC Converter with
Programmable Input Current Limit
96% Efficiency V
IN
: 1.8V to 5.5V, V
OUT
: 1.8V to 5.25V, I
Q
= 35µA,
I
SD
< 4µA, MSOP and DFN Packages
LTC3789 High Efficiency, Synchronous, 4-Switch Buck-Boost Controller V
IN
: 4V to 38V, V
OUT
: 0.8V to 38V, I
Q
= 3mA, I
SD
< 60µA,
SSOP-28, QFN-28 Packages
LTC3785 ≤10A (I
OUT
), High Efficiency, 1MHz Synchronous, No R
SENSE
™
Buck-Boost Controller
V
IN
: 2.7V to 10V, V
OUT
: 2.7V to 10V, I
Q
= 86µA, I
SD
< 15µA,
QFN Package
LTC3534 7V, 500mA (I
OUT
), 1MHz Synchronous Buck-Boost DC/DC
Converter
94% Efficiency, V
IN
: 2.4V to 7V, V
OUT
: 1.8V to 7V, I
Q
= 25µA,
I
SD
< 1µA, DFN and GN Packages
V
IN
(2V/DIV)
V
OUT
(200mV/DIV)
INDUCTOR
CURRENT
(1A/DIV)
200ms/DIV
31152 TA08b
12V
6V
15ms FALL TIME
4.5V
INPUT VOLTAGE
(10V/DIV)
V
OUT
(200mV/DIV)
200µs/DIV
31152 TA08c
36V
13.8V
INPUT VOLTAGE
(5V/DIV)
V
OUT
(200mV/DIV)
200µs/DIV
31152 TA08d
13.8V
4V