XC6123D440ER-G

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Power management integrated circuits (PMICs) make up a critical component of electronic designs. They convert the power from the battery or other power sources and distribute it to the other components within the system. A supervisor or similar device is responsible for controlling the power switch, which controls the power delivery to the rest of the circuit board. In this way the supervisor can monitor the voltage, temperature, and current of the system, and turn off the power if any of these parameters exceed a preset threshold value.

The XC6123D440ER-G is a PMIC supervisor from Texas Instruments. This family consists of power management supervisors, power monitors, and regulators designed for various applications in battery-powered and AC adapter-powered systems. The XC6123D440ER-G is specifically designed for mobile applications such as PDAs, cell phones, storage device controllers, modems, and other portable consumer electronics.

Working Principle

The XC6123D440ER-G is a family of PMICs that supports a multiple power control configuration with an integrated supervisor, monitor, and regulators to facilitate optimal power management in batteries, AC adapters, and typical mobile applications. The integrated supervisor and monitor provide critical overvoltage protection and current limit functions, which are the building blocks for mobile systems.

The integrated supervisor monitors the power supply rail by comparing the incoming voltage to the pre-set threshold value. The voltage reference for the comparison can be set in range of 1.4V – 5.1V and is used to detect the overvoltage condition when the rails exceed the threshold. If the threshold is exceeded, the supervisor will reduce the power switch and the charge pump counter to maintain the safe voltage.

The XC6123D440ER-G also integrates a power monitor, which is responsible for monitoring the current drawn from the power sources. This power monitor can detect excessively high currents and safely shut off power based on user-defined hard-limit thresholds. In addition, the power monitor can be configured to support dynamic current limiting by continuously adjusting the power switch and the charge pump counter to limit the amount of current being delivered to the system.

For applications that require regulation of the power output, the XC6123D440ER-G includes two high-performance linear regulators. These regulators can be configured to support up to 600mA of output current, providing a reliable and efficient means of providing step-down voltage regulation.

Conclusion

The XC6123D440ER-G is an ideal PMIC supervisor for mobile applications such as PDAs, cell phones, storage device controllers, and modems. Its integrated overvoltage protection and current limit functions, along with two high-performance linear voltage regulators, ensure proper power management and safe operation in battery-powered and AC adapter-powered mobile systems. In addition, its small form factor and low power consumption make it an attractive solution for space-constrained, power-sensitive mobile applications.

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