LTC3122_15 Datasheet, PDF (26/26 Pages) Linear Technology – 15V, 2.5A Synchronous Step-Up DC/DC Converter with Output Disconnect

LTC3122
Typical Application
Dual Supercapacitor Backup Power Supply, 0.5V to 5V
V_IN
0.5V TO 5V
SC1
50F
SC2
50F
L1
3.3µH
V_IN
SW _VOUT
OFF ON
C_IN
4.7µF
SD ^LTC3122
PWM/SYNC
CAP
RT
FB
R_T
57.6k
V_CC
SGND
C_VCC
4.7µF
V_C
PGND
C1
100nF
R1
383k
R_C
43.2k
C_C
1nF
R2
121k
C_F
68pF
V_OUT
5V
C_OUT
100µF
V_IN
2V/DIV
SD
2V/DIV
V_OUT
5V/DIV
OUTPUT
CURRENT
50mA/DIV
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
3122 TA08a
200s/DIV
3122 TA08b
Related Parts
PART NUMBER
LTC3421
LTC3422
LTC3112
LTC3458
LTC3528
LTC3539
LTC3459
LTC3499
LTC3115-1
DESCRIPTION
3A I_SW, 3MHz, Synchronous Step-Up DC/DC Converter
with Output Disconnect
1.5A I_SW, 3MHz Synchronous Step-Up DC/DC Converter
with Output Disconnect
2.5A I_SW, 750kHz, Synchronous Buck-Boost DC/DC Converter
with Output Disconnect, Burst Mode Operation
1.4A I_SW, 1.5MHz, Synchronous Step-Up DC/DC Converter/
Output Disconnect/Burst Mode Operation
1A I_SW, 1MHz, Synchronous Step-Up DC/DC Converter
with Output Disconnect/Burst Mode Operation
2A I_SW, 1MHz/2MHz, Synchronous Step-Up DC/DC Converters
with Output Disconnect/Burst Mode Operation
70mA I_SW, 10V Micropower Synchronous Boost Converter/
Output Disconnect/Burst Mode Operation
750mA Synchronous Step-Up DC/DC Converters with
Reverse-Battery Protection
40V, 2A Synchronous Buck-Boost DC/DC Converter
COMMENTS
95% Efficiency, V_IN = 0.5V to 4.5V, V_OUT(MAX) = 5.25V, I_Q = 12μA,
I_SD < 1μA, QFN24 Package
95% Efficiency, V_IN = 0.5V to 4.5V, V_OUT(MAX) = 5.25V, I_Q = 25μA,
I_SD < 1μA, 3mm × 3mm DFN Package
95% Efficiency, V_IN = 2.7V to 15V, V_OUT(MAX) = 14V, I_Q = 50μA,
I_SD < 1μA, 4mm × 5mm DFN and TSSOP Packages
93% Efficiency, V_IN = 1.5V to 6V, V_OUT(MAX) = 7.5V, I_Q = 15μA,
I_SD < 1μA, DFN12 Package
94% Efficiency, V_IN = 700mV to 5.25V, V_OUT(MAX) = 5.25V, I_Q = 12µA,
I_SD < 1µA, 3mm × 2mm DFN Package
94% Efficiency, V_IN = 700mV to 5.25V, V_OUT(MAX) = 5.25V, I_Q = 10µA,
I_SD < 1µA, 3mm × 2mm DFN Package
V_IN = 1.5V to 5.5V, V_OUT(MAX) = 10V, I_Q = 10μA, I_SD < 1μA,
ThinSOT™ Package
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
95% Efficiency, V_IN = 2.7V to 40V, V_OUT(MAX) = 40V, I_Q = 50µA,
I_SD < 3µA, 4mm × 5mm DFN and TSSOP Packages
26 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_Fo3_r5_m-7_o4_re1_i7_{nformation www.linear.com/LTC3122}
[phone] ^● FAX: [phone] ^● www.linear.com/LTC3122
3122fa
LT 0513 REV A • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2012