LTC3854IDDB#TRMPBF

Frequency - Switching:	400kHz
Base Part Number:	LTC3854
Supplier Device Package:	12-DFN (3x2)
Package / Case:	12-WFDFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	98%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 38 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The LTC3854IDDB#TRMPBF DC–DC Switching Controller is a versatile controller that allows users to select multiple topologies with a single device. It has excellent EMI/EMC performance and is ideal for use in high-power applications such as servers, computers and communications systems.The LTC3854IDDB#TRMPBF\'s main features include constant frequency operation at up to 1MHz, adjustable hold-up and soft-start times, adaptive on-time control scheme and current-mode control with programmable step reinforcement for constant VOUT operation. It also includes short circuit foldback protection, over temperature and primary input current limiting. Additionally, it incorporates a digital interface and close loop voltage margin control which can be used to monitor order maintain the VOUT and output ripple performance.The LTC3854IDDB#TRMPBF is a highly flexible device that is used to drive a range of DC–DC converters. It supports single and dual output configurations, including flyback, forward, buck and boost topologies, as well as various combinations of each. It is a very versatile device, capable of driving multiple phases in multi-phase applications. Furthermore, the LTC3854IDDB#TRMPBF makes it easy to implement low EMI/EMC designs with its integrated synchronous rectifier control, dual-input support and frequency dithering.In addition, the LTC3854IDDB#TRMPBF provides a range of features to further improve system efficiency and robustness. Its adaptive on-time control scheme is designed to prevent sub-harmonic oscillations when switching faster than its rated frequency. Its close loop voltage margin control monitors the VOUT and helps to maintain output accuracy and ripple performance. Furthermore, its synchronous rectifier control automatically deactivates the synchronous rectifier if the output current is too low, thus minimizing power dissipation in no-load conditions.The working principle of the LTC3854IDDB#TRMPBF is based on the fact that it utilizes a digital core to control a synchronous buck or boost converter. The digital core is responsible for controlling current-mode operations, managing selected frequency of switching, configuring hold-up and soft-start times, as well as providing short circuit protection and over-temperature protection. The controller uses an advanced digital control core to regulate the primary switch\'s pulse width. The output of the converter is regulated using topology dependent current-mode operation by sensing the current passing through the output inductor as it varies over time.The LTC3854IDDB#TRMPBF is suitable for applications that require a versatile, high power DC–DC controller. Examples include servers, communications systems, on-board server and workstation power supplies, and multiple power solution system architectures. The flexible, high efficiency design and wide operating range of the LTC3854IDDB#TRMPBF makes it ideal for medium- to high-power DC–DC applications.

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