BD46235G-TR Integrated Circuits (ICs)

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A PMIC - Supervisors refers to integrated circuits (ICs) that are used to monitor, govern and regulate the performance of various circuits in a microelectronic system. Supervisors are a broad category which includes local monitoring and voltage regulation devices as well as components that are used to trigger system reset, system power-down and other events. The BD46235G-TR is one such supervisory IC that is commonly used in a variety of system applications. In this article, we will take a closer look at the application field and working principle of the BD46235G-TR.

Overview

The BD46235G-TR is a T-type supervisor IC from ROHM Semiconductor, which is specifically designed to monitor the status of power supply and system voltage across a variety of microelectronic systems. It is a highly configurable device, which can be programmed for different applications. The BD46235G-TR is housed in a small, leadless WLCSP (Wafer Level Chip Scale Package) for applications where space is a major constraint.

Features

The BD46235G-TR supports a wide operating voltage range of 1.8V to 5.5V. It has an integrated voltage detector that is capable of providing highly accurate regulation of a system’s operating voltage. The BD46235G-TR has a wide range of functionality, including overvoltage, undervoltage, and radio frequency interference (RFI) detection, along with reset and power-down control. It also features a watchdog timer that can be used to reset the system if a specified time has passed without a reset signal. Furthermore, the IC provides fast, robust, and clean reset outputs. The IC also has a high-speed reset response of 10us (maximum), and short rise/fall times.

Application Field

The BD46235G-TR’s wide operating voltage range and integrated voltage detector make it an ideal solution for a variety of system applications. It is commonly used in automotive infotainment systems, wearables, IoT devices, and industrial automation equipment. The BD46235G-TR is also well-suited for use in PC systems, broadcasting equipment, and healthcare systems, providing stable voltage regulation for those applications. Additionally, the device is capable of supporting low-power systems and is highly suitable for use in battery-powered applications.

Working Principle

The BD46235G-TR is a 3-channel power-supply monitor, providing users with the ability to monitor up to three independent power supplies in a microelectronic system. It includes three voltage detectors, a watchdog timer, and a reset circuit. Each one of the voltage detectors has its own set of adjustable thresholds, and each voltage detector can be programmed to have either a Level-L (Low) or Level-H (High) output. By adjusting the Low level and High level thresholds, users can create different reset profiles for their system.

The watchdog timer is used to reset the system after a preset time interval if no reset signal is issued. The reset circuit is designed to provide a clean, fast, and robust reset signal when the voltage monitor pins reach the voltage thresholds set by the users. The output pin of the BD46235G-TR can be configured for either Active High or Active Low reset depending upon the application.

Conclusion

The BD46235G-TR is a highly configurable supervisory IC that is ideal for use in a variety of microelectronic systems. It supports a wide operating voltage range and offers a variety of features, such as voltage monitoring, RFI detection, overvoltage and undervoltage protection, reset and power-down control, and a watchdog timer. The BD46235G-TR is well-suited for use in automotive infotainment, wearables, IoT, industrial automation, and battery-powered applications.

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