MAX6339IUT+T

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Power Management Integrated Circuits (PMICs) are incredibly important components for all sorts of electronic systems and devices. Supervisors, in particular, provide failsafe mechanisms and over-voltage protection by actively monitoring and controlling the power supply of the circuit. The MAX6339IUT+T is a member of one such family of PMICs that provide such oversight, and this article will discuss its application field and working principle.

Application Field of MAX6339IUT+T

The MAX6339IUT+T is a member of the highly integrated PMIC series of supervisors developed by Maxim Integrated. It is best suited for use in a variety of industrial, consumer and computer applications and devices, primarily those where the operating temperature range is between -40°C and +125°C. It provides 3-channel output along with dual multiple precisions references, it is being used in various applications such as voltage and current monitoring, Voltage Hot Swap, Interlock, and Overvoltage Protection.

The MAX6339IUT+T also possesses an additional feature of being highly configurable. It allows for versatility in that each output can be custom-configured to specialize it for a given application, with various functions such as programmable blinking frequency, hysteresis, open drain outputs, and the choice between an open-drain or push-pull output. This is accomplished through the use of a 4-wire Serial Peripheral Interface (SPI) allowing for simple setup, monitoring, and dynamic programmability.

Working Principle of MAX6339IUT+T

The MAX6339IUT+T supervisor uses a low-power CMOS voltage-step-up regulator (VSU) circuit to adjust the voltage supplied to a load to its desired level. The VSU monitors the output voltage of the IC (VOUT) through a sensing resistor (RSET) and a differential amplifier. If the voltage drops below the specified threshold, the VSU provides additional voltage output to the load until the desired level is reached. The VSU compares the actual output voltage (VOUT) against different levels of references. It makes decisions about when to provide additional voltage to the load in order to maintain the voltages at their desired levels.

For current monitoring applications, the MAX6339IUT+T supervisor uses a dual differential amplifier to measure the line-return voltage. When the load current exceeds a specified threshold, the supervisor provides an external signal to indicate the presence of an overcurrent condition. Additionally, for overvoltage and Voltage Hot-Swap applications, the supervisor checks for an overvoltage condition and provides an external signal accordingly. The supervisor can be programmed to activate a programmable many output option and trip level that controls the ON/OFF states.

Conclusion

The MAX6339IUT+T supervisor is a highly capable and configurable power management integrated circuit (PMIC) that is suitable for a variety of industrial, consumer and computer applications. It is specially made to tolerate temperature changes in the range of -40°C and +125°C and has an extensive feature set adaptive to different requirements. It provides three-channel output, along with dual multiple precision references. Its functions include voltage and current monitoring, voltage hot swap, interlock, and overvoltage protection, all programmable through the use of a 4-wire serial peripheral interface.

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