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

LTC3112
Typical Application
10W, 10V High Intensity LED Driver with Programmable Current and Low-Loss Sensing
6.8µH
0.1µF
V_IN
5V TO 15V
22µF
1µF
SW1
SW2
BST1
BST2
V_{IN LTC3112} V_OUT
V_CC
COMP
PWMSYNC
FB
RUN
I_OUT
GND
OVP
0.1µF
V_DAC
DAC PROGRAMS LED CURRENT
1.0A AT 0V, 500mA AT 0.8V
68.1k ^{IOUT = (1-0.625 • VDAC)A}
3300pF ^200k
2210k
68.1k 158k
3300pF
47pF
V_OUT
22µF
VF = 3.6V
PER LED
AT 1A
OPEN LAMP AT 12V
3112 TA07
LED Current vs V_IN and DAC Voltage
1500
1250
1000
750
500
250
V_DAC = 0V
V_DAC = 0.8V
0
4
6
8
10 12 14
V_IN (V)
3112 TA08a
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NUMBER
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DESCRIPTION
COMMENTS
200mA Buck-Boost Synchronous DC/DC Converter
15V, 200mA Synchronous Buck-Boost Converter
V_IN = 1.8V to 5.5V, V_OUT = 3.3V, I_Q = 16μA, I_SD < 1μA , SOT23, DFN Package
V_IN = 2.42V to 15V, V_OUT = 1.4V to 15.75V, I_Q = 1.3μA, I_SD < 10nA , QFN and
MSOP Packages
2A (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 = 40μA, I_SD < 1μA , DFN Package
3A Low Noise Synchronous Buck-Boost DC/DC Converter V_IN or V_OUT = 1.8V to 5.5V, I_Q = 40µA, I_SD < 1µA, DFN and TSSOP Packages
7V, 500mA Synchronous Buck-Boost DC/DC Converter
V_IN = 2.4V to 7V, V_OUT = 1.8V to 7V, I_Q = 25μA, I_SD < 1μA , DFN, GN Package
800mA Synchronous Buck-Boost DC/DC Converter
V_IN = 2.4V to 5.5V, V_OUT = 1.8V to 5.25V, I_Q = 35μA, I_SD < 5μA , DFN Package
600mA (I_OUT), 2MHz Synchronous Buck-Boost DC/DC
Converter
V_IN = 2.5V to 5.5V, V_OUT = 2.5V to 5.25V, I_Q = 25μA, I_SD < 1μA , MSOP and
DFN Packages
1.2A (I_OUT), 1MHz Synchronous Buck-Boost DC/DC
Converter
V_IN = 2.4V to 5.5V, V_OUT = 2.4V to 5.25V, I_Q = 25μA, I_SD < 1μA , DFN Package
1.2A (I_OUT), 2MHz Synchronous Buck-Boost DC/DC
Converter with Programmable Burst Mode Operation
V_IN = 2.4V to 5.5V, V_OUT = 2.4V to 5.25V, I_Q = 35μA, I_SD < 1μA , DFN Package
High Current Micropower 600kHz Synchronous Buck-Boost V_IN = 2.4V to 5.5V, V_OUT = 1.5V to 5.25V, I_Q = 28μA, I_SD < 1μA , DFN Package
DC/DC Converter
2A (I_OUT), 40V Synchronous Buck-Boost DC/DC Converter V_IN = 2.7V to 40V, V_OUT = 2.7V to 40V, I_Q = 30µA, I_SD < 3μA , DFN and TSSOP
Packages
High Efficiency, Synchronous, 4-Switch Buck-Boost
Converter
V_IN = 4V to 36V, V_OUT = 0.8V to 30V, I_Q = 1500μA, I_SD < 55μA , QFN Package
10V, High Efficiency, 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
Wide V_IN, Multi-Output DC/DC Converter and PowerPath™ V_IN = 1.8V to 5.5V, V_OUT = 1.5V to 5.25V, I_Q = 38μA, I_SD < 15μA , QFN Package
Controller
Synchronous 400mA Buck-Boost and 200mA Buck
Wide Input Voltage Synchronous Buck-Boost DC/DC
Converter
V_IN = 2.4V to 5.5V, V_OUT = 2.2V to 5.25V, I_Q = 25μA, I_SD < 1μA , QFN Package
V_IN = 1.8V to 5.5V, V_OUT = 1.8V to 5.25V, I_Q = 40μA, I_SD < 1μA , DFN Package
32 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_Fo3_r5_m-7_o4_re1_i7_{nformation www.linear.com/LTC3112}
[phone] ^● FAX: [phone] ^● www.linear.com/LTC3112
3112fc
LT 0614 REV C • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2010