Datasheet

LTC3839
50
3839fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
FAX: (408) 434-0507
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011
LT 0612 REV A • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LTC3838 Dual Output, Fast Controlled On-Time, High Frequency
Synchronous Step-down Controller with Diff Amp
200kHz to 2MHz Operating Frequency, 4.5V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 5.5V, , 5mm × 7mm QFN-38, TSSOP-38
LTC3876 Dual, DC/DC Controller for DDR Memory Power with
Differential Voltage Sensing and ±50mA VTT Reference
200kHz to 2MHz Operating Frequency, 4.5V ≤ V
IN
≤ 38V,
1V ≤ VDDQ ≤ 2.5V, , 5mm × 7mm QFN-38, TSSOP-38
LTC3833 Fast Controlled On-Time, High Frequency Synchronous
Step-Down Controller with Diff Amp
200kHz to 2MHz Operating Frequency, 4.5V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 5.5V, , 3mm × 4mm QFN-20, TSSOP-20
LTC3880/LTC3880-1 Dual Output PolyPhase Step-Down DC/DC Controller with
Digital Power System Management
I
2
C/PMBus Interface with EEPROM and 16-Bit ADC, V
IN
Up to 24V,
0.5V ≤ V
OUT
≤ 5.5V, Analog Control Loop
LTC3869/LTC3869-2 Dual Output, 2-Phase Synchronous Step-Down DC/DC
Controller, with Accurate Current Sharing
PLL Fixed 250kHz to 750kHz Frequency, 4V ≤ V
IN
≤ 38V,
V
OUT3
Up to 12.5V
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
LTC3856 Single Output 2-Channel Synchronous Step-Down DC/DC
Controller with Diff Amp and Up to 12-Phase Operation
PLL Fixed 250kHz to 770kHz Frequency, 4.5V ≤ V
IN
≤ 38V,
0.8V ≤ V
OUT
≤ 5V
LTC3860 Dual, Multiphase, Synchronous Step-Down DC/DC Controller
with Diff Amp and Three-State Output Drive
Operates with Power Blocks, DRMOS Devices or External Drivers/
MOSFETs, 3V ≤ V
IN
≤ 24V, t
ON(MIN)
= 20ns
LTC3829 Single Output 3-Channel Synchronous Step-Down DC/DC with
Diff Amp and Up to 6-phase Operation
Controller Phase-Lockable Fixed 250kHz to 770kHz Frequency,
4.5V ≤ V
IN
≤ 38V, 0.8V ≤ V
OUT
≤ 5V
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
4.5V to 14V Input, 0.6V/30A Output, 400kHz, R
SENSE
, DTR Enabled, Step-Down Converter
3839 TA02
1nF
0.1µF
L2
0.22µH
DB2
MT2
MB2
LTC3839
2.2
2.2
47pF
220pF
36.5k
100k
30.1k
40.2k60.4k
V
IN
1µF
1nF
4.7µF
0.1µF
0.01µF
L1
0.22µH
R
S1
0.002
R
S2
0.002
C
OUT2
330µF
w4
C
OUT1
100µF
w4
V
OUT
0.6V
30A
V
IN
4.5V TO 14V
SENSE1
SENSE1
+
BOOST1
TG1
SW1
SENSE2
+
BOOST2
TG2
SW2
DRV
CC1
INTV
CC
DRV
CC2
EXTV
CC
DB1
SENSE2
BG1 BG2
PGND
V
OUTSENSE
+
V
OUTSENSE
PGOOD
TRACK/SS
ITH
DTR
V
RNG
SGND
RT
PGOOD
MB1
MT1
1µF
C
IN2
22µF
w3
+
C
IN1
180µF
+
20
20
20
20
PHASMD
MODE/PLLIN
CLKOUT
RUN
C
IN1
: SANYO 16SVP180MX
C
IN2
: MURATA GRM32ER61C226KE20L
C
OUT1
: MURATA GRM31CR60J107ME39L
C
OUT2
: SANYO 2R5TPE330M9
DB1, DB2: CENTRAL SEMI CMDSH-4ETR
L1, L2: WÜRTH 744307022
MT1, MT2: INFINEON BSC050NE2LS
MB1, MB2: INFINEON BSC010NE2LS