ISL61851AIBZ

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The ISL61851AIBZ is a hot swap controller that belongs to the family of integrated Power Module ICs (PMICs). It supports a wide variety of features and functions that are ideal for a variety of applications, including voltage and current hot-swapping (load current limitation) and a high degree of system integration with its combination of a hot-swap FET, regulator and control logic. This hot-swap controller is designed to provide hot-swapping and over-current protection for equipment that requires a high level of integration and flexibility in its system protection architecture.

The ISL61851AIBZ enables the hot-swapping of loads at any voltage level up to 40V, with compliance to Linear Technology’s HSIO (high-speed serial terminal). It’s also able to support full system integration with enable/disable and fault detect signals provided for the hot-swap FET, and with fault management (OTP, OVP) for system-fault safety and fault reporting. Additionally, the ISL61851AIBZ features an internal regulator that can provide a 3V8 output, a timer circuit or counters, an over-voltage protection switch and a soft-start circuit. The integrated fault monitor also monitors die temperature and can shutdown the system in case of an over-temperature condition.

The ISL61851AIBZ is well suited for various system designs serving a wide range of applications such as servers, consumer electronics and industrial system designs. Typical applications include PCI Express, PCMCIA, and ePCI, as well as other systems requiring hot-swapping and over-current protection. The ISL61851AIBZ can be used for low voltage applications with load current of up to 10A, and is able to provide a turn-on slew rate up to 400mV/us.

The main working principle behind the ISL61851AIBZ is to provide a safe way to hot-swap an electronic load from an independent power source, ensuring that the system is protected from current overload. This is achieved by using the hot-swap FET, which functions as an on/off switch for connecting the load to the power source. The FET is controlled by the fault manager which monitors the system and can detect any over-current, under-voltage, over-temperature, or other fault conditions. Once a fault is detected, the fault manager will shut down the FET, disconnecting the load from the power source and thus preventing any further damage to the system.

The ISL61851AIBZ has a low standby current requirement and a typical power-up time of less than 10us, making it an ideal solution for applications where hot-swapping or over-current protection is required. The controller’s internal regulator provides a 3V8 output, allowing it to operate with a wide range of power sources, from 1V8 to 40V. It also provides soft-start, over-current protection, and over-temperature shutdown. The integrated timer circuit can be used to control and monitor the over-current protection during hot-swapping to ensure that the current load does not exceed the safe level.

In conclusion, the ISL61851AIBZ is an ideal multi-function hot-swap controller from Linear Technology, designed for applications requiring safe hot-swapping and over-current protection. It provides a wide variety of features, including internal regulator, timer circuits, and control logic. With its combination of features, it is the perfect choice for use in a variety of systems and applications requiring efficient and reliable hot-swapping or over-current protection.

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