LTC3854 Series

Small Footprint, Wide VINRange Synchronous Step-Down DC/DC Controller

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

Small Footprint, Wide VINRange Synchronous Step-Down DC/DC Controller

Part	Control Features	Output Type	Frequency - Switching	Package / Case [y]	Package / Case	Package / Case [x]	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Mounting Type	Output Phases	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Supplier Device Package	Function	Output Configuration	Number of Outputs	Duty Cycle (Max) [Max]
Analog Devices Inc./Maxim Integrated LTC3854EMSE#TRPBF	Enable Soft Start	Transistor Driver	400 kHz	3 mm	12-TSSOP Exposed Pad	0.118 in	85 C	-40 ¯C	Buck	Surface Mount	1	4.5 V	38 V	12-MSOP-EP	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854IDDB#TRMPBF	Enable Soft Start	Transistor Driver	400 kHz		12-WFDFN Exposed Pad		85 C	-40 ¯C	Buck	Surface Mount	1	4.5 V	38 V	12-DFN (3x2)	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854IMSE#TRPBF	Enable Soft Start	Transistor Driver	400 kHz	3 mm	12-TSSOP Exposed Pad	0.118 in	85 C	-40 ¯C	Buck	Surface Mount	1	4.5 V	38 V	12-MSOP-EP	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854EDDB#TRPBF	Enable Soft Start	Transistor Driver	400 kHz		12-WFDFN Exposed Pad		85 C	-40 ¯C	Buck	Surface Mount	1	4.5 V	38 V	12-DFN (3x2)	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854EDDB#TRMPBF	Enable Soft Start	Transistor Driver	400 kHz		12-WFDFN Exposed Pad		85 C	-40 ¯C	Buck	Surface Mount	1	4.5 V	38 V	12-DFN (3x2)	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854EMSE#PBF	Enable Soft Start	Transistor Driver	400 kHz	3 mm	12-TSSOP Exposed Pad	0.118 in	85 C	-40 ¯C	Buck	Surface Mount	1	4.5 V	38 V	12-MSOP-EP	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854IDDB#TRPBF	Enable Soft Start	Transistor Driver	400 kHz		12-WFDFN Exposed Pad		85 C	-40 ¯C	Buck	Surface Mount	1	4.5 V	38 V	12-DFN (3x2)	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854IMSE#PBF	Enable Soft Start	Transistor Driver	400 kHz	3 mm	12-TSSOP Exposed Pad	0.118 in	85 C	-40 ¯C	Buck	Surface Mount	1	4.5 V	38 V	12-MSOP-EP	Step-Down	Positive	1	98 %

Catalog

Small Footprint, Wide VINRange Synchronous Step-Down DC/DC Controller

Description

The LTC3854 is a high performance synchronous stepdown switching DC/DC controller that drives an all N-channel synchronous power MOSFET stage.The LTC3854 features a 400kHz constant frequency current mode architecture. The LTC3854 operates from a 4.5V to 38V (40V absolute maximum) input voltage range and regulates the output voltage from 0.8V to 5.5V.The RUN/SS pin provides both soft-start and enable features. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. Current foldback limits MOSFET dissipation during short circuit conditions. Current foldback functions are disabled during soft-start.The LTC3854 has a minimum on-time at 75ns, making it well suited for high step-down ratios. The strong onboard MOSFET drivers allow the use of high power external MOSFETs to produce output currents up to 20A.ApplicationsAutomotive SystemsTelecom SystemsIndustrial EquipmentDistributed DC Power Systems