LTC3855_15 Datasheet, PDF (44/44 Pages) Linear Technology – Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense

LTC3855
Related Parts
PART NUMBER DESCRIPTION
COMMENTS
LTC3853
LTC3731
LTC3850/
LTC3850-1/
LTC3850-2
Triple Output, Multiphase Synchronous Step-Down DC/DC
Controller, R_SENSE or DCR Current Sensing and Tracking
3-Phase Synchronous Controller, Expandable to 12 phases
Differential Amp, High Output Current 60A to 240A
Dual 2-Phase, High Efficiency 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
Phase-Lockable Fixed 250kHz to 600kHz Frequency, 0.6V ≤ V_OUT ≤ 5.25V,
4.5V ≤ V_IN ≤ 32V,
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 Fixed 400kHz Operating Frequency 4.5V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 5.25V,
DC/DC Controller, R_SENSE or DCR Current Sensing
2mm × 3mm QFN-12
LTC3851A/
LTC3851A-1
No R_SENSE™ Wide V_IN Range Synchronous Step-Down DC/ Phase-Lockable Fixed 250kHz to 750kHz Frequency, 4V ≤ V_IN ≤ 38V,
DC Controller, R_SENSE or DCR Current Sensing and Tracking 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.
44 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3855f
LT 1009 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2009