MAX5939JESA

MAX5939JESA is a Hot Swap Controllers from Maxim Integrated that is designed for use in Systems with Hot Swaped Components. The device contains a number of features that provide protection and current limiting as well as adjustable overcurrent thresholds in order to prevent accidental damage to other components in the system. This product is well-suited for a wide range of applications, including server rack and blade applications, networking and server systems, storage networks, and industrial power systems.

The MAX5939JESA consists of a dual-channel load switch, overcurrent, and thermal protection. The device has two hot-swap channels and two current-limiting channels to protect two hot-swap loads independently. Hot-swap channels are specified to work with up to 14A of inrush current and 2.6A of continuous current. The low on-state resistance ensures low power dissipation and is adjustable via external resistors for applications with higher current requirements. The overcurrent threshold is adjustable from 1A to 6A and is designed to protect against inrush conditions and fault conditions.

The MAX5939JESA supports both active current-limiting and overcurrent protection. The active current-limiting algorithm uses feedback from the load current to limit current to the desired level. This provides system designers with the flexibility to set the current-limit level to match the load requirements, while avoiding damage to components due to overcurrent fault conditions. When overcurrent is detected, the device will quickly latch-off and shut down all load channels. Additionally, the device includes over temperature protection and fault recovery.

The device includes a host VDDQ supply that is enabled when the voltage on the load VDDQ exceeds the overvoltage threshold. This hostVDDQ supply provides an isolated power resource and allows the device to monitor and control the load VDDQ. This reduces the power losses associated with active load current-limiting and provides a more reliable system. Additionally, the integrated thermal shutdown feature prevents large inrush currents from causing thermal system damage.

The MAX5939JESA also features an adjustable slew-rate control that is adjustable from 2.2ns to 20000ns. This feature allows the system designer to further tailor the load switch performance to match specific needs and applications. The device supports a wide range of operating voltages, from 2.5V to 15V, providing system designers with flexibility to work in different voltage environments.

In summary, the MAX5939JESA provides an all-in-one solution for hot-swap applications and system with multiple hot-swap components. Its features, such as adjustable overcurrent and adjustable slew rate, allow system designers to tailor the performance to the specific system requirements. This device provides an ideal solution for systems with harsh voltage transients and multiple hot-swap components, such as server rack, blade, and industrial power systems.