LT3509EDE#TRPBF

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	LT3509
Supplier Device Package:	14-DFN (4x3)
Package / Case:	14-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	260kHz ~ 2.15MHz
Current - Output:	700mA
Voltage - Output (Max):	34.2V
Series:	--
Voltage - Input (Max):	36V
Voltage - Input (Min):	3.6V
Number of Outputs:	2
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction
LT3509EDE#TRPBF is a highly versatile and powerful DC/DC switching regulator. It utilizes a peak current-mode control architecture with fast transient response, and provides good line/load regulation at no-load and light-load conditions. Its features include short-circuit protection, cycle-by-cycle current limit, adjustable valley current, and adjustable foldback current. LT3509EDE#TRPBF also has an internal Soft-Start function that can be used to reduce output inrush currents and inrush load disturbances.

Application Field
LT3509EDE#TRPBF is a highly efficient DC/DC regulators that offer high power density and numerous features. Its small size makes it suitable for applications where space is a premium. It can be used in a variety of applications, including: automotive systems, telecommunications, industrial electronics and research systems.

LT3509EDE#TRPBF can be used in a wide variety of applications, ranging from DC/DC power supply systems, voltage regulation and power conversion for appliances, to photocopier, printer and many other electronic products. Its wide array of features and high efficiency make it a suitable choice for any power application, from low-to-medium-loads to large and complex systems.

Working Principle
LT3509EDE#TRPBF is an integrated switching regulator. It uses a peak current-mode control architecture that includes integrated short-circuit protection, cycle-by-cycle current limit, adjustable valley current, and adjustable foldback current. Peak current-mode control is used because it has fast transient response, good line/load regulation, and excellent stability and variability.

When a load is connected to the regulator, it initiates a signal that alerts the controller that a load has been detected. Once the signal is detected, the controller switches an output transistor in order to regulate the power. If the load increases, the controller increases the output voltage, and if the load decreases, the controller decreases the output voltage. The controller also constantly checks the load current and adjusts the output voltage in order to regulate the power efficiently. To avoid overload, the controller can be set to limit the maximum safe output current.

Conclusion
LT3509EDE#TRPBF is a powerful and highly efficient DC/DC switching regulator. It uses a peak current-mode control architecture with integrated short-circuit protection and features adjustable valley current and adjustable foldback current. It is suitable for a variety of applications, such as automotive systems, telecommunications, industrial electronics and research systems. Its wide array of features and high efficiency make it a suitable choice for any power application.

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