LTC3854IDDB#TRPBF

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Analog Devices Inc./Maxim Integrated

SMALL FOOTPRINT, WIDE VINRANGE SYNCHRONOUS STEP-DOWN DC/DC CONTROLLER

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LTC3854IDDB#TRPBF

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Analog Devices Inc./Maxim Integrated

SMALL FOOTPRINT, WIDE VINRANGE SYNCHRONOUS STEP-DOWN DC/DC CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3854 Series

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

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3854IDDB#TRPBF

Clock Sync	No
Control Features	Soft Start, Enable
Duty Cycle (Max)	98 %
Frequency - Switching	400 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	12-WFDFN Exposed Pad
Package Length	3 mm
Package Name	12-DFN
Package Width	2 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	38 V
Voltage - Supply (Vcc/Vdd) Minimum	4.5 V

LTC3854 Series

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

Part	Control Features	Output Type	Frequency - Switching	Package Length	Package Features	Package Name	Package Width	Synchronous Rectifier	Operating Temperature (Max)	Operating Temperature (Min)	Topology	Clock Sync	Mounting Type	Output Phases	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum	Function	Output Configuration	Number of Outputs	Duty Cycle (Max)	Package / Case
Analog Devices Inc./Maxim Integrated LTC3854EMSE#TRPBF	Enable Soft Start	Transistor Driver	400 kHz	0.118 in	Exposed Pad	12-MSOP-EP 12-TSSOP	3 mm	Yes	85 °C	-40 °C	Buck	No	Surface Mount	1	38 V	4.5 V	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854IDDB#TRMPBF	Enable Soft Start	Transistor Driver	400 kHz	3 mm		12-DFN	2 mm	Yes	85 °C	-40 °C	Buck	No	Surface Mount	1	38 V	4.5 V	Step-Down	Positive	1	98 %	12-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3854IMSE#TRPBF	Enable Soft Start	Transistor Driver	400 kHz	0.118 in	Exposed Pad	12-MSOP-EP 12-TSSOP	3 mm	Yes	85 °C	-40 °C	Buck	No	Surface Mount	1	38 V	4.5 V	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854EDDB#TRPBF	Enable Soft Start	Transistor Driver	400 kHz	3 mm		12-DFN	2 mm	Yes	85 °C	-40 °C	Buck	No	Surface Mount	1	38 V	4.5 V	Step-Down	Positive	1	98 %	12-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3854EDDB#TRMPBF	Enable Soft Start	Transistor Driver	400 kHz	3 mm		12-DFN	2 mm	Yes	85 °C	-40 °C	Buck	No	Surface Mount	1	38 V	4.5 V	Step-Down	Positive	1	98 %	12-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3854EMSE#PBF	Enable Soft Start	Transistor Driver	400 kHz	0.118 in	Exposed Pad	12-MSOP-EP 12-TSSOP	3 mm	Yes	85 °C	-40 °C	Buck	No	Surface Mount	1	38 V	4.5 V	Step-Down	Positive	1	98 %
Analog Devices Inc./Maxim Integrated LTC3854IDDB#TRPBF	Enable Soft Start	Transistor Driver	400 kHz	3 mm		12-DFN	2 mm	Yes	85 °C	-40 °C	Buck	No	Surface Mount	1	38 V	4.5 V	Step-Down	Positive	1	98 %	12-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3854IMSE#PBF	Enable Soft Start	Transistor Driver	400 kHz	0.118 in	Exposed Pad	12-MSOP-EP 12-TSSOP	3 mm	Yes	85 °C	-40 °C	Buck	No	Surface Mount	1	38 V	4.5 V	Step-Down	Positive	1	98 %

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3854IDDB#TRPBF | Datasheet

R526 Reliability Data