Datasheet

LTC3855
44
3855f
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 2009
LT 1009 • PRINTED IN USA
relaTeD parTs
PART NUMBER DESCRIPTION COMMENTS
LTC3853 Triple Output, Multiphase Synchronous Step-Down DC/DC
Controller, R
SENSE
or DCR Current Sensing and Tracking
Phase-Lockable Fixed 250kHz to 750kHz Frequency, 4V ≤ V
IN
≤ 24V,
V
OUT3
Up to 13.5V
LTC3731 3-Phase Synchronous Controller, Expandable to 12 phases
Differential Amp, High Output Current 60A to 240A
Phase-Lockable Fixed 250kHz to 600kHz Frequency, 0.6V ≤ V
OUT
≤ 5.25V,
4.5V ≤ V
IN
≤ 32V,
LTC3850/
LTC3850-1/
LTC3850-2
Dual 2-Phase, High Efficiency Synchronous Step-Down DC/
DC Controller, R
SENSE
or DCR Current Sensing and Tracking
Phase-Lockable Fixed 250kHz to 780kHz Frequency, 4V ≤ V
IN
≤ 30V,
0.8V ≤ V
OUT
≤ 5.25V
LTC3854 Small Footprint Wide V
IN
Range Synchronous Step-Down
DC/DC Controller, R
SENSE
or DCR Current Sensing
Fixed 400kHz Operating Frequency 4.5V ≤ V
IN
≤ 38V, 0.8V ≤ V
OUT
≤ 5.25V,
2mm × 3mm QFN-12
LTC3851A/
LTC3851A-1
No R
SENSE
™ Wide V
IN
Range Synchronous Step-Down DC/
DC Controller, R
SENSE
or DCR Current Sensing and Tracking
Phase-Lockable Fixed 250kHz to 750kHz Frequency, 4V ≤ V
IN
≤ 38V,
0.8V ≤ V
OUT
≤ 5.25V, MSOP-16E, 3mm × 3mm QFN-16, SSOP-16
LTC3878 No R
SENSE
Constant On-Time Synchronous Step-Down
DC/DC Controller, No R
SENSE
Required
Very Fast Transient Response, t
ON(MIN)
= 43ns, 4V ≤ V
IN
≤ 38V,
0.8V ≤ V
OUT
≤ 0.9V
IN
, SSOP-16
LTC3879 No R
SENSE
Constant On-Time Synchronous Step-Down
DC/DC Controller, No R
SENSE
Required
Very Fast Transient Response, t
ON(MIN)
= 43ns, 4V ≤ V
IN
≤ 38V,
0.6V ≤ V
OUT
≤ 0.9V
IN
, MSOP-16E, 3mm × 3mm QFN-16
LTM4600HV 10A DC/DC µModule
®
Complete Power Supply High Efficiency, Compact Size, Fast Transient Response 4.5V ≤ V
IN
≤ 28V,
0.8V ≤ V
OUT
≤ 5V, 15mm × 15mm × 2.8mm
LTM4601AHV 12A DC/DC µModule Complete Power Supply High Efficiency, Compact Size, Fast Transient Response 4.5V ≤ V
IN
≤ 28V,
0.8V ≤ V
OUT
≤ 5V, 15mm × 15mm × 2.8mm
LTC3610 12A, 1MHz, Monolithic Synchronous Step-Down DC/DC
Converter
High Efficiency, Adjustable Constant On-Time 4V ≤ V
IN
≤ 24V,
V
OUT(MIN)
0.6V, 9mm × 9mm QFN-64
LTC3611 10A, 1MHz, Monolithic Synchronous Step-Down DC/DC
Converter
High Efficiency, Adjustable Constant On-Time 4V ≤ V
IN
≤ 32V,
V
OUT(MIN)
0.6V, 9mm × 9mm QFN-64
LTC3857/
LTC3857-1
Low I
Q
, Dual Output 2-Phase Synchronous Step-Down
DC/DC Controller with 99% Duty Cycle
Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,
4V ≤ V
IN
≤ 38V, 0.8V ≤ V
OUT
≤ 24V, I
Q
= 50µA
LTC3868/
LTC3868-1
Low I
Q
, Dual Output 2-Phase Synchronous Step-Down
DC/DC Controller with 99% Duty Cycle
Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,
4V ≤ V
IN
≤ 24V, 0.8V ≤ V
OUT
≤ 14V, I
Q
= 170µA,
LT3845 Low I
Q
, High Voltage Synchronous Step-Down DC/DC
Controller
Adjustable Fixed Operating Frequency 100kHz to 500kHz,
4V ≤ V
IN
≤ 60V, 1.23V ≤ V
OUT
≤ 36V, I
Q
= 30µA, TSSOP-16
No R
SENSE
is a trademark of Linear Technology Corporation. µModule is a registered trademark of Linear Technology Corporation.