LTC3815EUFE#TRPBF

Voltage - Output (Min/Fixed):	0.4V
Base Part Number:	LTC3815
Supplier Device Package:	38-QFN (4x6)
Package / Case:	38-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	6A
Voltage - Output (Max):	3.96V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.25V
Number of Outputs:	1
Output Type:	Programmable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction
The LTC3815EUFE#TRPBF is a step-up dc-to-dc switching voltage regulator from Linear Technology, the world leader in ultra-low-power analog solutions. The LTC3815EUFE#TRPBF is a highly efficient, monolithic, synchronous step-up dc-to-dc regulator with an internal current-mode switch. Its internal 48V, 0.2A power switch and external components result in a low-cost, low-profile, highly efficient solution suitable for a wide range of power distribution and battery charger applications.Application Field
The LTC3815EUFE#TRPBF is suitable for use in a variety of applications, including high-efficiency power supplies, battery chargers, voltage dropouts, and distributed power systems. It can be used as a standalone regulator, or as a supply or battery charger in conjunction with other supplies or regulators. It is excellent for use in battery-powered systems, where its high efficiency can result in substantial battery life improvements. Its wide input-voltage range, adjustable stick-and-spike protection, power-good output and various other features make the LTC3815EUFE#TRPBF suitable for use in a wide range of power supply and battery charger applications.Working Principle
The LTC3815EUFE#TRPBF is a synchronous step-up dc-to-dc voltage regulator. It utilizes an internal power switch and an external Schottky diode/inductor combination, along with a few other external components.The LTC3815EUFE#TRPBF employs a current-mode switching technique that, along with the internal power switch and external components, allows it to step-up the input voltage to a higher voltage output.The LTC3815EUFE#TRPBF has two main modes of operation: synchronous and non-synchronous. In the synchronous mode, the output voltage is regulated by a feedback loop in which the output voltage is compared to a reference voltage, the error is amplified, and the internal power switch is driven accordingly. In the non-synchronous mode, the power switch is driven by an internal oscillator, and the output voltage is regulated by changing the duty cycle of the power switch, with the output capacitor acting to filter out the switching frequency and to maintain a steady output voltage.Conclusion
The LTC3815EUFE#TRPBF is a highly efficient, monolithic, synchronous step-up dc-to-dc voltage regulator manufactured by Linear Technology. It is suitable for use in a wide range of power distribution and battery charger applications, and its wide input-voltage range, adjustable stick-and-spike protection, power-good output and various other features make it an ideal solution for these applications. The LTC3815EUFE#TRPBF utilizes a current-mode switching technique, along with an internal power switch and a few external components, to provide a highly-efficient voltage conversion from a lower input voltage to a higher output voltage.

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