TPS3851G18SDRBR

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Power management integrated circuits (PMICs) have become essentials in the design of most electronics, from small wearables and smartphones to large medical, robotic and industrial equipment. A PMIC typically consist of multiple power device controllers, supervisors, regulators, switches and power sequencers that together provide all the power functions needed for a device.

TPS3851G18SDRBR is a special type of PMICs - supervisors, which are designed to mitigate catastrophic() power failure events, preserve data integrity, and maintain system operation. In other words, they are safety-critical components in the system, protecting loss and destruction of valuable data and spare designers the need to design in manual forms of fault-protection.

The TPS3851G18SDRBR has a 7.2-V auxiliary input, 18-μA minimal quiescent() current, and powered via reset sign for microcontroller reset protection, as well as protection against shock and vibration events.

The main application field of TPS3851G18SDRBR is critical supply voltage sequence and monitoring applications, such as digital monitoring, data logging, and systems control, that require precise and consistent power up and down sequencing and monitoring.

It is able to provide precise independent control of up to 8-power supplies sequentially and with adjustable delays. This makes it useful for applications such as motor control and power sequencing of telecoms base stations, non-isolated power supplies, CPUs and set-top boxes.

The working principle of TPS3851G18SDRBR is simple. Its power inputs are connected to the primary and secondary power rails, while the reset input is connected to the microcontroller’s reset signal. When both supplies are present and the reset signal is “High”, the supervisor will monitor the supply levels. If either the primary or secondary supply drops below the preset voltage level, a reset signal is generated which will reset the microcontroller. This will then cause a shutdown of the system.

The key features of TPS3851G18SDRBR is its adjustable delay programmability and precise control, providing electromagnetic compatibility and power sequencing flexibility. It also provides feedback information directly to the control registers, allowing microcontroller to monitor and/or take corrective action.

In conclusion, TPS3851G18SDRBR is a special kind of PMIC-Supervisor that provides precise supply voltage sequence, monitoring and control. It is used in safety-critical applications, such as motor control, data logging, and power sequencing of telecoms base stations, that require precise power up and down sequencing and monitoring.

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