BD48L42G-TL Integrated Circuits (ICs)

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Power management integrated circuits (PMICs) supervise and control a variety of power-related tasks, such as monitoring power supply voltages, setting individual current limiting thresholds, and charging and discharging batteries. A supervisor is a dedicated power management IC (PMIC) designed to protect the processor and core components from power-related faults, such as overvoltage, undervoltage, power glitches, brownouts, and overcurrent. One example is the BD48L42G-TL, a four-channel PMIC supervisor from ROHM Semiconductor.

The BD48L42G-TL is a 4-channel PMIC supervisor IC that includes overvoltage protection, power-on reset, circuit status detection, and other essential functions for microcontrollers. The device monitors input voltage, output voltage, and operating current and provides the appropriate control signals to the microcontroller when a fault occurs. The internal blocks of the PMIC Supervisor provide protection against overvoltage, undervoltage, power drop, and other potential hazards. In addition, it features watchdogs, individual programmable reset thresholds, PORR (power-on reset) options, reset event detection, and pushbutton control.

Thanks to its low operating supply voltage, the BD48L42G-TL is ideal for portable applications such as wearables, IoT devices, and automotive systems. The device can operate from an input voltage range of 0.9V to 5.5V and features a very efficient output voltage range of 2.85V to 5.5V. This allows the supervisor to remain active even when the supply voltage is unexpectedly reduced, helping to protect the processor from overcurrent, brownouts, and other related faults.

The BD48L42G-TL can be used for a variety of applications, including general-purpose microcontrollers and system-on-chips (SoC). It is available in a small 6-lead TSOT-23 package, making it ideal for handheld and wearable technologies that require a compact form factor.

The working principle of the BD48L42G-TL is relatively straightforward. When the input voltage is within the expected operating range, the supervisor allows the microcontroller to be powered up, enabling it to complete its various tasks. If the input voltage falls outside the operating range, the supervisor immediately interrupts the power supply, protecting the processor from the voltage spikes, glitches, and other hazards associated with low voltage operation.

The supervisor also includes a unique protection circuit for overvoltage, known as OVP. This circuit shuts off the power supply when the input voltage exceeds a predetermined level, reducing the risk of damage to the processor and other components. In addition, the device provides a pushbutton control function that allows a user to enable or disable the power supply, and the circuit status detection function can be used to monitor the operating conditions of the microcontroller.

In conclusion, the BD48L42G-TL PMIC supervisor from ROHM Semiconductor is a versatile and efficient power management solution that ensures system stability and reliable operation. The device provides a comprehensive portfolio of features and functions, designed to protect the processor and core components from overvoltage, undervoltage, and power glitches. Thanks to its small form factor and low operating supply voltage, the BD48L42G-TL is ideal for use in wearables, IoT devices, and general-purpose microcontroller applications.

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