LTC3779HFE#TRPBF

Frequency - Switching:	50kHz ~ 600kHz
Base Part Number:	LTC3779
Supplier Device Package:	38-TSSOP
Package / Case:	38-TFSOP (0.173", 4.40mm Width), 31 Leads, Exposed Pad
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	Current Limit, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	90%
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 150 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck, Boost
Output Configuration:	Positive
Function:	Step-Up, Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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• Introduction

LTC3779HFE#TRPBF is one of the most popular DC-DC Switching Controllers produced by Linear Technology Corporation. It is often used in handheld devices and automotive applications, such as smart phones, PDAs, EPDs, industrial computers, and electric power supplies. This controller is specifically designed to provide high voltage, low noise and low cost solutions for dc-dc convertors. The features of this controller include, but are not limited to, overCurrent protection, Feedback Termination, Adjustable Soft-Start, Adjustable Output Voltage, Over-Voltage Lockout and Dynamic Retrace Limit.

• Application Field

The LTC3779HFE#TRPBF is well-suited for a variety of power supply applications. It can be used for boosting the voltage of a 5V supply to a higher voltage, up to an absolute max of 30V. It can also be used to power 13V and 16V systems, as well as digital and analog systems. This product also offers low-loss current sensing, allowing for enhanced power efficiency and improved system accuracy. In addition to these standard usage applications, the LTC3779HFE#TRPBF can also be used in a variety of automotive applications. With the appropriate design modifications, this controller can be employed to implement an on-board battery charger, a low-cost fuel injector driver, and a fan speed controller, among other useful applications.

• Working Principle

The LTC3779HFE#TRPBF is a highly integrated, low-cost DC/DC switching controller. It features a wide input voltage range of 4.5V to 30V, making it ideal for use in a variety of power supply applications. This product has integrated feedback circuitry, allowing it to adjust the output voltage and current according to the voltage on the external components, as well as providing protection in the event of over-voltage, under-voltage, or over-current conditions.Additionally, the LTC3779HFE#TRPBF features several advanced features, including Soft-Start, Adjustable Retrace Time, Adjustable Frequency, Adjustable Output Voltage, Dynamic Output Voltage, and Adjustable Dynamic Retrace Limit. These features provide users with the flexibility to develop solutions for a variety of power supply applications.The LTC3779HFE#TRPBF is designed to eliminate the need for discrete components, as it contains all of the circuitry necessary for a DC/DC switching power supply. It is designed with closed-loop operation in mind, meaning that the controller monitors the output voltage, current, and temperature, and adjusts the parameters accordingly. This allows the power supply to remain robust, which is crucial in applications that require high reliability. In summary, the LTC3779HFE#TRPBF is a highly versatile and reliable DC-DC switching controller. By utilizing the integrated feedback circuitry and advanced features, it can be used to develop solutions in a variety of power supply applications. Whether in automotive or commercial applications, this product offers advantages in terms of cost, efficiency, and reliability compared to other solutions.

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