BU45K402G-TL Integrated Circuits (ICs)

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The BU45K402G-TL is a member of the ROHM Semiconductor family of Power Management IC’s (PMICs). Specifically, this series of ICs is classified as voltage supervisors, as they are designed to monitor a circuit’s voltage and detect any out of limit conditions. Voltage supervisors are designed to prevent circuit malfunction due to transient voltage conditions or other unexpected power events.

The BU45K402G-TL is a compact 4 channel system that provides an integrated solution for monitoring power supplies and particularly useful for applications such as PCs, servers, and embedded systems. The input voltage range is 2.0 to 5.5V. Labelling of each channel is provided to distinguish pinouts’ numbers and functions. The BU45K402G-TL has a maximum operating current draw of 1mA max., and can provide power supply monitoring capability and is designed to tell the system when single channel operation reaches a pre-set limit, such as brown out and over-voltage protection.

The BU45K402G-TL uses digital technology to detect voltage conditions and purposely ignores/blocks digital noise from its reference voltage as it is compared to the user-defined thresholds. This means that Digital Noise Voltage cannot cause the supervisor to sense an incorrect voltage condition. Additionally, the BU45K402G-TL offers options for enabling/disabling of channels, masking, plus the ability to reset the input, although these commands are specific for each product.

The BU45K402G-TL operates on a single voltage source so that when one of the channels is being monitored, the rest of the channels are active but inactive simultaneously. On-chip P-Channel FETs are employed to ensure independent operation of each channel, as well as better EMI/EMC performance and IC power dissipation. Each channel also has independent pull-up current that may be adjusted by the user with an external resistor in the input line.

The output of the BU45K402G-TL can be used to provide a signal to the MCU or a system controller whenever an input voltage condition is detected. This signal can be used to activate a warning or shutdown the system before it reaches a critical state. The BU45K402G-TL is also capable of enabling or disabling the output signals, allowing for customization for any given application. Finally, the BU45K402G-TL also provides self-diagnostic monitoring upon startup, and can be used to check for the presence of a supply before starting the system. The BU45K402G-TL can be used in a variety of different industrial and consumer applications.

Overall, the BU45K402G-TL is a superior voltage supervisor IC with a variety of features and benefits that make it an excellent choice for monitoring power supplies in a wide range of applications. With its high accuracy, signal intolerance of digital noise, low power consumption, and expandable channel count, the BU45K402G-TL is a great choice for any design need where a reliable and efficient voltage supervisor is required.

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