MAX5905USA+T

Programmable Features:	Circuit Breaker, Current Limit, Fault Timeout
Base Part Number:	MAX5905
Feature Pins:	ON
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Current - Supply:	1.2mA
Operating Temperature:	0°C ~ 85°C
Current - Output (Max):	--
Voltage - Supply:	1 V ~ 13.2 V
Series:	VariableSpeed/BiLevel™
Features:	Latched Fault, UVLO
Applications:	PCI Express®
Internal Switch(s):	No
Number of Channels:	2
Type:	Hot Swap Controller, Sequencer
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

The MAX5905USA+T, a Hot Swap Controller from Maxim Integrated, is designed to protect the hot plugging of 1.2V to 3.3V system power rails, support a low-battery controller, and maintain a constant input voltage. Hot Swap controllers protect the PMIC and the load in 1.2V to 3.3V systems whenever anything goes wrong, making them a popular choice for reducing system downtime and better managing system power. In this article, we will discuss the application fields and working principle of the MAX5905USA+T and other Hot Swap Controllers.

Applications

The MAX5905USA+T is used to protect the system power rails from overcurrent conditions and voltage transients when hot-plugging devices. It is the ideal solution for applications that require continuous power and need protection from sudden power disruptions. These applications include communication systems, industrial equipment, and consumer electronics. MAX5905USA+T can also be used in automotive applications.

Features

The MAX5905USA+T features overcurrent protection for two power rails. It has two integrated sense FETs to protect the system from overcurrent conditions and give off an audible alert in case of an overcurrent condition. Moreover, it also provides an enable pin for system reset, a brown-out reset for voltage transients, and an enable output given for overvoltage/undervoltage protection.The MAX5905USA+T also offers a separate voltage monitor with external resistors. This allows it to act as a low-battery controller to keep the system running at a constant voltage. It also has a reverse current detection feature which helps in detecting reverse current conditions.

Work Principle

The MAX5905USA+T is a current-mode hot-swap controller. The sense FETs integrated within the device detect any overcurrent conditions and send out an audible signal in case of any fault. The device also has an overvoltage/undervoltage protection circuit which can be used to regulate supply voltage.The device also has a low-battery controller to maintain the input voltage at a constant level. It uses an external resistor network to detect the voltage at the output. The voltage at the output is then compared to a reference voltage and if the voltage is less than the reference voltage, the device will minimize the switch on-time to reduce the current draw.

Conclusion

The MAX5905USA+T is a Hot Swap Controller that offers over current protection, voltage monitoring, and reverse current protection for 1.2V to 3.3V system power rails. This Hot Swap Controller provides a number of features which make it suitable for a wide range of applications such as communication systems, industrial equipment, and consumer electronics. It also has a low-battery controller to maintain an input voltage at a constant level and a reverse current detection feature to detect any reverse current conditions. These features make the MAX5905USA+T a great choice for any system that needs protection from overcurrent and voltage fluctuations.

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