LTC1643AL-1IGN#PBF

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LTC1643AL-1IGN#PBF are Power Management Integrated Circuits (PMIC) and Hot Swap Controllers from Linear Technology Corporation. Hot swap is an important application within the field of power supply and management. It provides an additional layer of protection for components or subsystems connected to power rails, holding them in reset state during power-on, and protecting against faults while they are connected to a power supply. The LTC1643AL-1IGN#PBF specifically offers a SPI/I2C compatible serially programmable hot swap controller with precision soft-start and power sequencing features. It is suitable for use in a variety of hot swap applications, including industrial, automotive, and medical.

The LTC1643AL-1IGN#PBF is an IC that can be integrated into various system architectures and enables the safe powering of additional devices or subsystems. It uses an on-chip N-channel MOSFET switch that connected between the system supply rail and the external power supply. The process of powering-up the system is termed “soft-swap” and involves setting a voltage level that slowly increases. Soft-swapping prevents the external power supply from driving too much current too quickly and allows the system to adjust its power levels gradually.

The LTC1643AL-1IGN#PBF also provides power sequencing. This is the synchronization of voltage and current levels to ensure that each subsystem receives the proper power during the initial start cycle. Power sequencing simplifies the management of the enable pins on the various components, allowing one enable pin to be used for multiple components of the system. Depending on the system requirements, power sequencing can be set up to run in series or in parallel.

In terms of features, the LTC1643AL-1IGN#PBF includes programmable soft start and analog current limit, digital current limit and time limited current limit. It has a user configurable undervoltage lockout for the external power supply and inrush current control for charging capacitive loads. It is also offered in a small US8 (3mm x 3mm) package that can fit in even the most space-constrained system designs. Also, the LTC1643AL-1IGN#PBF is designed to be compliant with a variety of safety standards, including UL, CSA and IEC, and is rated for automotive and industrial applications.

In summary, the LTC1643AL-1IGN#PBF is a Power Management Integrated Circuit (PMIC) and Hot Swap Controller that offers a variety of features and functions. With its user-configurable settings, small size, and a variety of safety features, the LTC1643AL-1IGN#PBF is a suitable choice for system designs that require hot swap controllers and power sequencing.

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