Datasheet

LTC3860
36
3860fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2010
LT 0311 REV C • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC3850/LTC3850-1
LTC3850-2
Dual Output, 2-Phase Synchronous Step-Down DC/DC Controller,
R
SENSE
or DCR Current Sensing
PLL Fixed 250kHz to 780kHz Frequency, 4V ≤ V
IN
≤ 30V,
0.8V ≤ V
OUT
≤ 5.25V
LTC3869/
LTC3869-2
Dual Output, 2-Phase Synchronous Step-Down DC/DC Controller
with Accurate Current Share
PLL Fixed 250kHz to 750kHz Frequency, 4V ≤ V
IN
≤ 38V,
V
OUT3
Up to 12.5V
LTC3856
Single Output 2-Phase Synchronous Step-Down DC/DC
Controller with Diff Amp and DCR Temperature Compensation
PLL Fixed 250kHz to 770kHz Frequency, 4.5V ≤ V
IN
≤ 38V,
0.8V ≤ V
OUT
≤ 5V
LTC3855 Dual Output, 2-Phase, Synchronous Step-Down DC/DC Controller
with Diff Amp and DCR Temperature Compensation
PLL Fixed Frequency 250kHz to 770kHz, 4.5V ≤ V
IN
≤ 38V,
0.8V ≤ V
OUT
≤ 12V
LTC3775 High Frequency Synchronous Voltage Mode Step-Down DC/DC
Controller
Very Fast Transient Response, t
ON(MIN)
= 30ns, 4V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 0.8V
IN
, MSOP-16E, 3mm × 3mm QFN-16
LTC3853 Triple Output, Multiphase Synchronous Step-Down DC/DC
Controller, R
SENSE
or DCR Current Sensing and Tracking
PLL Fixed 250kHz to 750kHz Frequency, 4V ≤ V
IN
≤ 24V,
V
OUT3
Up to 13.5V
LTC4449 High Speed Synchronous N-Channel MOSFET Driver V
IN
Up to 38V, 4V ≤ V
CC
≤ 6.5V Adaptive Shoot-Through
Protection, 2mm × 3mm DFN-8 Package
LTC4442/LTC4442-1 High Speed Synchronous N-Channel MOSFET Driver V
IN
Up to 38V, 6V ≤ V
CC
≤ 9V Adaptive Shoot-Through
Protection, MSOP-8 Package
LTC3880/LTC3880-1 Dual Output PolyPhase Step-Down DC/DC Controller with Digital
Power System Management
V
IN
Up to 24V, 0.5V ≤ V
OUT
≤ 5.5V, Analog Control Loop,
I
2
C/PMBus Interface with EEPROM and 16-Bit ADC
TYPICAL APPLICATION
V
CC
FB1
COMP1
VSNSOUT
VSNSN
VSNSP
COMP2
FB2
RUN1
I
LIM1
ISNS1P
ISNS1N
ISNS2N
ISNS2P
I
LIM2
RUN2
V
DIFF
V
OSN
V
OSP
V
CC
V
CC
RUN1
TRACK/SS1
PWM2
TRACK/SS1
VINSNS
SGND SGND
I
AVG
PGOOD1
PWMEN1
PWM1
TRACK/SS2 FREQ CLKIN CLKOUT PHSMD PGOOD2 PWMEN2 PWM2
LTC3860
0.01μF
470μF
4.7μF
22μF
1μF
V
IN
7V TO 14V
V
CC
5V
RUN1
V
DIFF1
CLOCKIN
600kHz
SYNC INPUT
TRACK/SS1
100k
59.0k
OPEN
(OPT)
OPEN
(OPT)
OPEN
(OPT)
OPEN
(OPT)
PWM1
I
AVG1
100pF
2.2Ω
0.22μF
SW1
SW2
5V
100Ω
0.01μF
0.01μF
V
CC
V
CC
47pF
1000pF
COMP1
470pF
4.7k
220Ω20k
20k
45.3k
4.7μF
1μF
V
IN
1mΩ
2.2Ω
V
IN
0.22μF
5V
4.7μF
V
CC
22μF
4.7μF
1μF
47μF
6.3V
s4
0.3μH
0.3μH
330μF
2.5V
s4
V
OUT1
1.2V
40A
47Ω
3860 TA08
V
OSP
V
CIN
DISABLE
PWM
V
IN
R2J20602
REG5V BOOT
V
SWH
V
LDRV
CGND PGND
V
CIN
PWM
DISABLE
V
IN
R2J20602
REG5V BOOT
V
SWH
V
LDRV
CGND PGND
1mΩ
47Ω
V
OSN
Dual Phase Single Output with DRMOS and R
SENSE