LT3508HUF#TRPBF

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	LT3508
Supplier Device Package:	24-QFN-EP (4x4)
Package / Case:	24-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	920kHz ~ 1.06MHz
Current - Output:	1.4A
Voltage - Output (Max):	35.28V
Series:	--
Voltage - Input (Max):	36V
Voltage - Input (Min):	3.7V
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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LT3508HUF#TRPBF Application Field and Working Principle

Introduction

The LT3508HUF#TRPBF is a high performance low input voltage synchronous switching regulator ideal for various applications such as telecom, data center, and infrastructure systems. The tool provides high efficiency, wide input voltage operation range, and input disconnect detection all in one device. This device is specifically designed for power management applications utilizing PMIC voltage regulators DC-DC switching regulators.

Application Field

The LT3508HUF#TRPBF can be used in a variety of applications and industries, such as telecommunications, data centers, infrastructure systems, and automotive, as well as in industrial and medical device production.The device provides a wide input voltage operation range, and therefore can be used in a wide range of power sources and applications. It supports conversion of voltages ranging from 4.5V to 25V, with an output current up to 10A depending on the particular application.

Working Principle

The LT3508HUF#TRPBF is a synchronous, step-down switching regulator that operates using the buck topology. The device senses the output voltage to regulate its duty cycle, and features an internal low side MOSFET switch configuration, making it suitable for a wide range of circuits.In the buck topology, an external inductor is connected in series between the input voltage source and the load. The LT3508HUF#TRPBF senses the output voltage, and then controls the power switch to regulate the output current.The device has two inputs, one for high side switching, and one for low side switching, and each is equipped with a dedicated FET to coordinate the high and low side switching. The low side gate driver is powered directly from the input voltage and the high side gate is driven by an internal regulated gate driver providing 3000V isolation.The LT3508HUF#TRPBF also features current mode operation, which allows the device to respond quickly to varying load currents. This helps to improve load transient performance, and reduce output voltage overshoot typically seen in voltage mode operation.

Protection Features

The LT3508HUF#TRPBF also incorporates a comprehensive suite of protection features to maintain reliable operation even in the most extreme conditions.It features Under Voltage Lock Out (UVLO) to protect the system from inrush currents, OVP (over voltage protection) to protect devices from excessive voltage, over current protection and short circuit protection to ensure safe operation under any load.

Summary

The LT3508HUF#TRPBF is a high performance low input voltage synchronous switching regulator from Linear Technology ideal for various power management applications including telecommunications, data centers, and automotive application. This device operates on the buck topology, utilizing a low side MOSFET switch configuration, and features a wide input voltage operation range, along with current mode operation for improved load transient performance and output voltage overshoot. It also includes several protection features such as Under Voltage Lock Out (UVLO), OVP (over voltage protection), over current protection and short circuit protection, allowing it to operate reliably even in extreme conditions.

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