MAX5910ESA+

Series:	Simple Swapper™
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Hot Swap Controller
Number of Channels:	1
Internal Switch(s):	Yes
Applications:	Networking
Features:	Thermal Limit
Programmable Features:	UVLO
Voltage - Supply:	10 V ~ 65 V
Current - Output (Max):	240mA
Operating Temperature:	-40°C ~ 85°C
Current - Supply:	1.2mA
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Feature Pins:	ENABLE, /IFAULT, PGOOD, UVLO
Base Part Number:	MAX5910

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Introduction

MAX5910ESA+ is a PMIC (power management integrated circuits) hot-swap controller from Maxim Integrated. This hot-swap controller can provide robust inrush current protection for bus-powered applications, such as field-powered disk drive systems, to avoid any sudden current draw overload issues that can damage power supplies as well as other components within the system. In addition to hot-swap control features, the MAX5910ESA+ also provides battery monitor operation and adjustable under-voltage protection. This article will discuss the application field and working principle of the MAX5910ESA+ PMIC hot-swap controller.

Application Field

MAX5910ESA+ is ideal for applications where inrush current protection and precise voltage control are required. The MAX5910ESA+ provides precise control over isothermal current limit thresholds and switching points, as well as a 7-bit voltage ID for up to 128 power-supply-part numbers. This makes the MAX5910ESA+ ideal for applications that require precise control of the power supply such as industrial and automotive computer server applications, or any other application that requires a precise enable / disable control of the power supply module.The MAX5910ESA+ also provides the ability to control multiple power supply rails in the same system. This allows for hot-swap operation of multiple power supplies, as well as monitoring and controlling each power supply separately. This is especially useful for complex systems with multiple power-supply rails requiring independent monitoring, such as telecommunications and automotive systems.

Features

The MAX5910ESA+ features a wide range of hot-swap protection features, such as adjustable current limit and voltage monitoring, as well as adjustable switching points. The device also features selectable latch-off and auto-retry modes, allowing for precise control over the current limit and switching points. The MAX5910ESA+ also features an integrated dual-phase current limit, allowing for precise current limit control and ensuring that no single power supply rail is ever over-stressed.The MAX5910ESA+ also provides protection from unexpected power surges, such as those caused by power glitches, ESD (electro-static discharge), and induction, by protecting the system against unexpected and dangerous inrush current events. This robust protection allows for safe operation of sensitive applications, such as field-powered disk-drive systems, that may otherwise be prone to inrush-current-induced failure.

Working Principle

The MAX5910ESA+ is a PMIC hot-swap controller, which means it is able to monitor and control the power supply and the inrush current of a system. This is done by controlling the voltage and current input to the system, as well as providing a precise control signal to the power supply. When a system is powered-on, the MAX5910ESA+ monitors the voltage and current inputs to the system and determines the need for current and voltage control. If the input current is determined to be too high for a safe power-on operation, the MAX5910ESA+ will begin to reduce the current input to the system until it is low enough to safely power-on the system. Once the current is low enough, the MAX5910ESA+ will then adjust the voltage to achieve the desired output voltage.Once the system is powered-on, the MAX5910ESA+ is still monitoring the voltage and current inputs. If the input current is determined to be too low, the MAX5910ESA+ will increase the current input to the system until it is safe enough to operate the system within the specified current limits.The MAX5910ESA+ is also able to protect the system from unexpected voltage and current surges, by quickly cutting off the power before any potential damage is caused. This inrush current protection mode allows for a safe and reliable power-on operation even in the presence of transient surges.

Conclusion

The MAX5910ESA+ is a PMIC hot-swap controller from Maxim Integrated that can provide robust inrush current protection for field-powered disk drive systems. This device is ideal for applications that require precise voltage and current control, as well as protection from unexpected power glitches, ESD, and induction. The MAX5910ESA+ also provides an integrated dual-phase current limit, adjustable voltage monitoring, and adjustable switching points, to ensure precise current limit control and power supply protection.

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