BU4841G-TR

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Power management integrated circuits (PMICs) are essential components of modern electronic systems. PMICs provide the energy capacity and resolution necessary to control and monitor critical power and system parameters. Supervisors are one type of PMIC, and the BU4841G-TR is a good example of a modern supervisor. This device offers a wide range of integrated power management and protection features for embedded systems and offers improved system performance in industrial and automotive applications.

The BU4841G-TR is a seven-pin supervisor with six active pins, plus an open-drain monitoring output. It offers ideal voltage monitoring and under-voltage detection (UVD) protection with ±5% accuracy, while the input voltage range of 2.0V to 5.5V allows for use in a variety of different systems. The MON pin provides open-drain output to indicate power status; the supervisor’s power output can be enabled and disabled by an active low input, while a second active low input can reset the system. The input pins are reverse biased (in reset) without external resistors, which simplifies the monitoring circuit. The device draws a low 26 µA of current and is in a very small package with a footprint of just 2.0 mm x 1.8 mm.

The BU4841G-TR’s wide input voltage range and small package make it a popular choice for use in embedded systems in a variety of industries, including automotive, computing, industrial, and power. The device also offers a wide range of protection features, including reverse leakage current (Leq) protect, power output enable and disable control, reset function, and under-voltage detection. These features all contribute to the device’s suitability for use in embedded systems that require reliable power management and protection.

The BU4841G-TR’s operation is based on the principle of using multiple power supplies within a system. In systems with multiple power supplies, the device monitors a reference voltage (VREF) and compares it with the main power supply. If the main power supply drops below the reference voltage, the device will trip a reset or alarm signal, disabling the power output or initiating a reset sequence. This ensures that the system maintains a preset voltage level and avoids potential catastrophic event in the system due to a loss of power. Additionally, the BU4841G-TR offers two low-voltage detection techniques, one for the power supply and one for the back-up circuit, along with protection from reverse current leakage and power output enable/disable control.

The BU4841G-TR supervisor is a reliable and energy-efficient power management solution for embedded systems. Its wide voltage range and integrated protection features make it well-suited for use in a variety of industries, from automotive and industrial to computing and power. Its small package size and reverse bias capability makes it ideal for use in space-constrained applications, while its low power consumption helps to maximize system performance and efficiency.

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