TPS3851H33SQDRBRQ1

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The TPS3851H33SQDRBRQ1 is a PMIC - Supervisors device from Texas Instruments. It is suitable for providing advanced supervisory functions in Power Management ICs (PMICs) for PCs, Notebooks, PDAs, MP3 players, and other consumer and industrial applications that are powered from varying sources and require either shut-down or restart in order to maintain proper functioning. This device is a highly integrated, low-voltage, low-power PMIC - Supervisors solution that integrates multiple monitoring, protection, and control features in a compact 8-pin package.

Overview of TPS3851H33SQDRBRQ1

The TPS3851H33SQDRBRQ1 PMIC - Supervisors is a 4-channel, Dual Buffered Power-On Reset (POR) Supervisory IC designed to improve power supply system, system performance and system stability. It is driven by a 3.3V power supply and offers adjustable reset thresholds and reset timer functions, which can make erroneous positive or negative edge reset pulses are eliminated. Additionally, the device has multiple power management functions, including brown-out detection, reversed-battery detection and over-voltage detection.

Application Field of TPS3851H33SQDRBRQ1

The TPS3851H33SQDRBRQ1 is ideal for application in industrial, mobile and consumer devices that require protective monitoring of system voltage. Examples include cell phone, calculator, radio, TV set and other digital devices. Additionally, the device can be used for applications that require power control or management in order to protect the system from power-induced malfunctions. Examples include servers, workstations, routers, personal digital assistants, digital cameras, music players, digital camcorders and automotive systems.

Working Principle of TPS3851H33SQDRBRQ1

The TPS3851H33SQDRBRQ1 consists of two separate POR circuits that are independently configurable and ensure proper system control and protection. The POR circuits monitor two separate supply voltages and each circuit contains two channels that are each monitored by same individual comparator. The two channels are clocked by two independent thresholds. A Reset signal is initialized as an output when a drop in the monitored voltage is detected, and the voltage of the supply must exceed the stored valid voltage for a set time before the Reset can be de-asserted.

The device supports the Detect-Only reset mode in which a reset pulse is asserted when the voltage of the monitored voltage drops below the pre-set threshold and the reset pulse is de-asserted when the voltage rises back above the threshold. Additionally, the device has configurable delay periods that can be programmed to increase the valid time of a reset by delaying the return of the reset signal after the monitored voltage has exceeded the valid voltage.

Conclusion

The TPS3851H33SQDRBRQ1 is a power management IC (PMIC) supervisors designed to ensure system safety and stability by providing advanced supervisory functions in PMICs. Its reset clock is highly accurate and can detect the slightest of supply voltage drops. It is intended for industrial, consumer and mobile device applications that require protective monitoring of system voltage and power control or management. The TPS3851H33SQDRBRQ1 is a small and efficient device that provides highly reliable system monitoring and control in a compact 8-pin package.

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