LTC3854IMSE#PBF

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Analog Devices

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

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LTC3854IMSE#PBF

Active

Analog Devices

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

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DocumentsDatasheet R526 Reliability Data

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3854IMSE#PBF

Clock Sync	False
Control Features	Soft Start, Enable
Duty Cycle (Max) [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	Exposed Pad, 12-TSSOP
Package / Case	0.118 in, 3 mm
Supplier Device Package	12-MSOP-EP
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	38 V
Voltage - Supply (Vcc/Vdd) [Min]	4.5 V

LTC3854 Series

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

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

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 7.30
		10	$ 4.98
		25	$ 4.38
		100	$ 3.70
		250	$ 3.38
		500	$ 3.18
		1000	$ 3.01
		2500	$ 2.85

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