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LTC3875
TYPICAL APPLICATION
(OPTIONAL)
THERMAL
SENSOR
0.25µH
(0.32m DCR)
715
220nF
220nF
V
OUT
+
470µF
2.5V ×2
SP
RELATED PARTS
PART NUMBER
DESCRIPTION
LTC3774
Dual, Multiphase Current Mode Synchronous Step-Down DC/DC
Controller for Sub-Milliohm DCR Sensing
LTC3866
Single Output Current Mode Synchronous Controller with Sub-Milliohm
DCR Sensing
LTC3855
Dual, Multiphase, Synchronous Step-Down DC/DC Controller with
Differential Output Sensing and DCR Temperature Compensation
LTC3838/LTC3838-1/
Dual, Fast, Accurate Step-Down Controlled On-Time DC/DC Controller
LTC3838-2
with Differential Output Sensing
LTC3890/LTC3890-1/
Dual, High V
LTC3890-2/LTC3890-3
Controller
LTC3861/LTC3861-1
Dual, Multiphase, Synchronous Step-Down Voltage Mode DC/DC
Controller with Diff Amp and Accurate Current Sharing
LTC3856
Single Output, Dual Channel Synchronous Step-Down DC/DC Controller
with Differential Output Sensing and DCR Temperature Compensation
LTC3869
Dual 2-Phase, Synchronous Step-Down DC/DC Controller
LTC3857/LTC3857-1
38V Low I
LTC3858/LTC3858-1
Controller with 99% Duty Cycle
46
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
FAX: (408) 434-0507
●
High Efficiency Dual Phase 1V/60A Step-Down Converter
INTV
CC
4.7µF
V
RUN1,2
BSC050NE2LS
ILIM
ENTMPB
TG1
0.1µF
BOOST1
SW1
EXTV
BSC010NE2LSI
3.57k
BG1
TAVG
TRSET1
SNSA1
SNS1
SNSD1
TCOMP1
V
OSNS1
V
OSNS1
I
TH1
TK/SS1
, Low I
2-Phase Synchronous Step-Down DC/DC
IN
Q
, Dual Output 2-Phase Synchronous Step-Down DC/DC
Q
For more information
www.linear.com/LTC3875
●
INTV
PHASMD
IN
CC
CLKOUT
PGOOD
IFAST
MODE/PLLIN
TG2
0.1µF
BOOST2
LTC3875
SW2
BSC010NE2LSI
CC
BG2
PGND
TRSET2
+
+
SNSA2
–
–
SNS2
+
+
SNSD2
TCOMP2
+
FREQ
–
+
V
OSNS2
–
V
OSNS2
TK/SS2
I
TH2
100k
10k
0.1µF
COMMENTS
Operates with DrMOS, Power Blocks or External
Drives/MOSFETs, 4.5V ≤ V
0.6V ≤ V
Synchronous Fixed Frequency 250kHz to 770kHz,
4.5V ≤ V
PLL Fixed Frequency 250kHz to 770kHz,
4.5V ≤ V
Synchronizable Fixed Frequency 200kHz to 2MHz,
4.5V ≤ V
PLL Capable Fixed Frequency 50kHz to 900kHz,
4V ≤ V
Operates with DrMOS, Power Blocks or External
Drivers/MOSFETs, 3V ≤ V
Phase-Lockable Fixed 250kHz to 770kHz Frequency,
4.5V ≤ V
Synchronous Fixed Frequency 250kHz to 780kHz, 4.5V
≤ V
PLL Fixed Operating Frequency 50kHz to 900kHz,
4V ≤ V
www.linear.com/LTC3875
V
IN
6V TO 14V
22µF
16V ×4
(OPTIONAL)
BSC050NE2LS
THERMAL
SENSOR
0.25µH
(0.32m DCR)
3.57k
715
220nF
220nF
13.3k
1500pF
20k
≤ 38V,
IN
≤ 3.5V
OUT
≤ 38V, 0.6V ≤ V
≤ 3.5V
IN
OUT
≤ 38V, 0.8V ≤ V
≤ 12V
IN
OUT
≤ 38V, 0.8V ≤ V
≤ 5.5V
IN
OUT
≤ 60V, 0.8V ≤ V
≤ 24V, I
IN
OUT
Q
≤ 24V
IN
≤ 38V, 0.8V ≤ V
≤ 5V
IN
OUT
≤ 38V, 0.6V ≤ V
≤ 12.5V
IN
OUT
≤ 38V, 0.8V ≤ V
≤ 24V, I
IN
OUT
Q
LT 1115 REV B • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2013
V
OUT
1.2V
60A
+
470µF
2.5V ×2
SP
3875 TA02
= 50µA
= 50µA/170µA
3875fb
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