BD5231G-TR Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	--
Voltage - Threshold:	3.1V
Operating Temperature:	-40°C ~ 105°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	5-SSOP
Base Part Number:	BD52

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PMIC - Supervisors: BD5231G-TR Application Field and Working Principle

Power management IC (PMIC) supervisors are integrated circuits that help manage power in electronic devices. The BD5231G-TR is a low power CMOS supervisor used to implement power failsafe features in battery-powered systems. This supervisor has a variety of features, including a range of adjustable thresholds and reset outputs to increase system reliability and reduce complexity. This article will discuss the application field and working principle of the BD5231G-TR supervisor.

Application Field

The BD5231G-TR is designed for use in portable electronic devices that require reliable power failsafe features. These devices include handheld computers, cellular phones, automotive electronics, and medical instruments. This supervisor\'s small size, low voltage operation, and low power consumption provide a crucial advantage in mobile and battery-powered systems.The BD5231G-TR has several adjustable limits, including pre-reset (PRS) and VDD monitoring. These adjustable limits automate power-on and power-off sequences, ensuring minimal power consumption and system uptime. Furthermore, its two output pins, one active-low reset pin and one open-drain power-on reset (POR) pin, are easily configurable, enabling customization of its reset signal type and timing.

Working Principle

The BD5231G-TR supervisor is a low power CMOS supervisor that operates with a single power supply of 1.8V to 5.5V. Internal circuitry includes an oscillator, a detect block, and a reset release block. The oscillator generates an internal clock signal, while the detect block monitors the pre-reset, system power supply (VDD), and brown-out reset (BOR) limitations. The reset release block performs reset deassertion and voltage detection functions.When the pre-reset voltage or the system power supply (VDD) drops below the pre-set threshold levels, the detect block sends a reset signal to the reset release block. After reset deassertion, the output pins re-assert. The BD5231G-TR supervisor prevents system disorder due to transient conditions such as rush current or power glitches by adjusting the reset timing window.Finally, the open-drain POR pin provides a reset output that is compatible with the positive logic input of microprocessors such as Microchip\'s PIC and Atmel\'s AVR series. This ensures reliable system restart and data backup when power is cut to the system.

Conclusion

The BD5231G-TR is a low power CMOS supervisor used to implement power failsafe features in battery-powered systems. Its adjustable limits provide automated power-on and power-off sequences, decreasing power consumption and boosting system uptime. Its two output pins, one active-low reset pin and one open-drain power-on reset (POR) pin, enables customization of its reset signal type and timing. Finally, the open-drain POR pin provides a reset output that is compatible with the positive logic input of various microprocessors. The BD5231G-TR supervisor is therefore ideal for portable electronic devices that require reliable power failsafe features.

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