LTC3859AHFE#TRPBF

Frequency - Switching:	115kHz ~ 835kHz, 350kHz ~ 535kHz
Base Part Number:	LTC3859
Supplier Device Package:	38-TSSOP-EP
Package / Case:	38-TFSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	Enable, Frequency Control, Power Good, Soft Start, Tracking
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	99%, 100%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 38 V
Output Phases:	2
Number of Outputs:	3
Topology:	Buck, Buck-Boost, SEPIC
Output Configuration:	Positive
Function:	Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to LTC3859AHFE#TRPBFThe LTC3859AHFE#TRPBF is a high-efficiency DC/DC switching controller that is designed to control the power conversion in complex systems. It supports both synchronous rectification and (SSR) mode operations and features a complete analog control loop. The device works intuitively and intelligently, featuring a soft-start sequence, eight phase synchronization inputs, adjustable voltage from 0.8V to 5.5V, and a built-in load line circuitry. It also features a low-power switching solution for the most demanding loads.Application Field and Working Principle of LTC3859AHFE#TRPBFThe LTC3859AHFE#TRPBF is used as a DC/DC switching controller as it can generate a variety of high-efficiency, low-power switching systems. Its applications include automotive, telecom, notebook, consumer and industrial applications and it is also suitable for various power supplies, low-noise designs, and multi-rail applications.The working principle of the LTC3859AHFE#TRPBF is simple but very efficient. The device supports a current-mode control architecture, allowing closed loop regulation to provide fast transient response, as well as better control during load transients. Additionally, the device also supports an active current-loop current sharing scheme, which allows for the optimization of the total power system.The LTC3859AHFE#TRPBF also supports a wide range of topologies, with adjustable voltage range from 0.8V to 5.5V and adjustable frequency, making it suitable for most applications. This device is also capable of synchronizing to an external clock, with eight possible phase sync inputs, allowing it to be configured for maximum efficiency and accuracy.The overall idea is that this device provides a wide range of functions, giving system designers the flexibility they need to build efficient, reliable, low-power switching systems.ConclusionThe LTC3859AHFE#TRPBF is a very advanced DC/DC switching controller which, with its wide range of features and multiple topologies, is suitable for all kinds of applications. Its built-in active current-loop current sharing scheme, adjustable voltage range and adjustable frequency, make it capable to fit the exact needs of any system. Therefore, its use in modern, efficient and reliable switching systems is undeniable.

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