MAX5900ACETT+T

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Power management integrated circuits (PMICs) are key pieces of hardware that help manage, monitor and convert power in computing devices. Hot swap controllers are a type of PMICs, with their primary objective being to facilitate efficient, safe and cost-effective insertion or removal of power sources and loads. With this purpose in mind, they safeguard power sources and components from damage while ensuring reliable and uninterrupted power delivery.

MAX5900ACETT+T, manufactured by Maxim Integrated, is a hot swap controller featuring dynamic gate biasing for low-power hot swap applications. This controller integrates an N-channel MOSFET, a gate-ladder logic, and a gate drive circuit. It has a maximum gate drive voltage of up to 20V and an operating temperature range between -40°C and +105°C.

MAX5900ACETT+T is designed for use in a wide range of hot swap applications, from 1-cell to 4-cell regulation. It features programmable current limiting capabilities and a slew-rate limited fault timer, allowing for a smooth transition from normal operating conditions to fault conditions. The MAX5900ACETT+T controller also comes with undervoltage (UV) and overvoltage (OV) monitoring, as well as thermal shutdown, so the user can program the device to the desired voltage, current, fault limit and temperature levels.

The working principle of the MAX5900ACETT+T is fairly simple. First, the device senses the input voltage at VIN and then evaluates it for a minimum level. If the input voltage is lower than the specified “lockout” voltage, the device will disconnect the input voltage until the input voltage is high enough to re-enable the device. Secondly, the device limits the current going through the load using a sensing resistor. When the load current is higher than the specified limit, the MAX5900ACETT+T will trip the fault latch. Lastly, the device automatically shuts off if the temperature of the component rises above the thermal shut-off temperature.

The MAX5900ACETT+T is a valuable component for device designers, thanks to its wide range of safety features and its ease of operation. The device’s programmability allows it to be used for a variety of different application scenarios, making it an ideal choice for any hot-swap circuit design.

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