LTC4236IUFD-2#TRPBF

Programmable Features:	Current Limit
Base Part Number:	LTC4236
Feature Pins:	--
Supplier Device Package:	28-QFN (4x5)
Package / Case:	28-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Current - Supply:	2.7mA
Operating Temperature:	-40°C ~ 85°C
Current - Output (Max):	--
Voltage - Supply:	2.9 V ~ 18 V
Series:	--
Features:	Auto Retry
Applications:	General Purpose
Internal Switch(s):	No
Number of Channels:	2
Type:	Hot Swap Controller, OR Controller
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

PMIC – Hot Swap Controllers are used to regulate power supply voltages, maintain current levels and provide other associated power management functions. One of the most popular and reliable Hot Swap Controllers is the LTC4236IUFD-2#TRPBF. This device is specially designed to enable regulated supplies in applications with potentially high input voltages and peak transient loads.

Application Field

TheLTC4236IUFD-2#TRPBF is a Hot Swap Controller with an adjustable input voltage range of 3.3V to 5.5V, making it an excellent choice for a variety of applications such as telecom, industrial, automotive and embedded computing.The device offers a constant current/voltage mode, programmable turn-on/off slopes, and programmable slew rates, allowing designers to select the best configuration for their system to ensure reliable and safe operation in the targeted application field.The Hot Swap Controller can also protect low-voltage systems from high input voltages and peak current transients. This is done by controlling when and how power is supplied to the system, thereby avoiding inrush currents and voltage overshoots that can damage sensitive components.In addition, the device offers load disconnect protection, which can be helpful in applications where power must be shut down in the face of an overload, short circuit, or over-temperature scenario.

Working Principle

The LTC4236IUFD-2#TRPBF Hot Swap Controller works by monitoring the voltage and current that is being supplied to the system. When the input voltage is above a certain predefined threshold, typically greater than 4.5V, the device starts to switch the power switch internally. This switching turns on the power switch and the device is then able to control the power that is being supplied to the system by varying the duty cycle of the power switch.The duty cycle of the power switch is determined by the feedback signals from the input voltages and the current sense resistor. When the current sense resistor detects over-current conditions, it sends a signal to the device and the device starts to decrease the duty cycle of the power switch. This reduces the current supplied to the system and helps protect against overloads or short circuits.Additionally, the device is able to turn off the power switch if the input voltage drops below its predefined threshold, helping to protect low-voltage systems from higher input voltages.

Conclusion

The use of the LTC4236IUFD-2#TRPBF provides reliable and safe power regulation in applications with potentially high input voltages and peak transient loads. The device offers excellent protection against inrush currents, over-current and over-voltage scenarios. Additionally, the device is adjustable and customizable for a variety of applications. Overall, the LTC4236IUFD-2#TRPBF provides an excellent and reliable solution for Hot Swap applications.

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