LTC3122
26
3122fa
For more information www.linear.com/LTC3122
LINEAR TECHNOLOGY CORPORATION 2012
LT 0513 REV A • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC3122
relaTeD parTs
Typical applicaTion
Dual Supercapacitor Backup Power Supply, 0.5V to 5V
PART NUMBER DESCRIPTION COMMENTS
LTC3421 3A I
SW
, 3MHz, Synchronous Step-Up DC/DC Converter
with Output Disconnect
95% Efficiency, V
IN
= 0.5V to 4.5V, V
OUT(MAX)
= 5.25V, I
Q
= 12μA,
I
SD
< 1μA, QFN24 Package
LTC3422 1.5A I
SW
, 3MHz Synchronous Step-Up DC/DC Converter
with Output Disconnect
95% Efficiency, V
IN
= 0.5V to 4.5V, V
OUT(MAX)
= 5.25V, I
Q
= 25μA,
I
SD
< 1μA, 3mm × 3mm DFN Package
LTC3112 2.5A I
SW
, 750kHz, Synchronous Buck-Boost DC/DC Converter
with Output Disconnect, Burst Mode Operation
95% Efficiency, V
IN
= 2.7V to 15V, V
OUT(MAX)
= 14V, I
Q
= 50μA,
I
SD
< 1μA, 4mm × 5mm DFN and TSSOP Packages
LTC3458 1.4A I
SW
, 1.5MHz, Synchronous Step-Up DC/DC Converter/
Output Disconnect/Burst Mode Operation
93% Efficiency, V
IN
= 1.5V to 6V, V
OUT(MAX)
= 7.5V, I
Q
= 15μA,
I
SD
< 1μA, DFN12 Package
LTC3528 1A I
SW
, 1MHz, Synchronous Step-Up DC/DC Converter
with Output Disconnect/Burst Mode Operation
94% Efficiency, V
IN
= 700mV to 5.25V, V
OUT(MAX)
= 5.25V, I
Q
= 12µA,
I
SD
< 1µA, 3mm × 2mm DFN Package
LTC3539 2A I
SW
, 1MHz/2MHz, Synchronous Step-Up DC/DC Converters
with Output Disconnect/Burst Mode Operation
94% Efficiency, V
IN
= 700mV to 5.25V, V
OUT(MAX)
= 5.25V, I
Q
= 10µA,
I
SD
< 1µA, 3mm × 2mm DFN Package
LTC3459 70mA I
SW
, 10V Micropower Synchronous Boost Converter/
Output Disconnect/Burst Mode Operation
V
IN
= 1.5V to 5.5V, V
OUT(MAX)
= 10V, I
Q
= 10μA, I
SD
< 1μA,
ThinSOT™ Package
LTC3499 750mA Synchronous Step-Up DC/DC Converters with
Reverse-Batter
y Protection
94% Efficiency, V
IN
= 1.8V to 5.5V, V
OUT(MAX)
= 6V, I
Q
= 20µA,
I
SD
< 1µA, 3mm × 3mm DFN and MSOP Packages
LTC3115-1 40V, 2A Synchronous Buck-Boost DC/DC Converter 95% Efficiency, V
IN
= 2.7V to 40V, V
OUT(MAX)
= 40V, I
Q
= 50µA,
I
SD
< 3µA, 4mm × 5mm DFN and TSSOP Packages
3122 TA08a
V
IN
V
OUT
LTC3122
SGND PGND
R
C
43.2k
C
C
1nF
SW
3.3µH
R2
121k
R1
383k
C
F
68pF
C
VCC
4.7µF
C1
100nF
C
OUT
100µF
V
5V
R
T
57.6k
V
IN
0.5V TO 5V
C
IN
, C
VCC
: 4.7µF, 6.3V, X7R, 1206
C1: 100nF, 6.3V, X7R, 1206
C
OUT
: 100µF, 6.3V, X7R, 1812
L1: TDK SPM6530T-3R3M
SC1, SC2: MAXWELL BCAP0050-P270
SD
SC1
50F
SC2
50F
PWM/SYNC
RT
V
CC
CAP
FB
V
C
ON
C
IN
4.7µF
SD
2V/DIV
OUTPUT
V
OUT
5V/DIV
V
IN
2V/DIV
