MIC809RYC3

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Power Management IC (PMICs) are integrated circuits that are used to regulate the electrical power of a system. PMICs play an important role in system power management by providing power conversion, voltage and current regulation, power sequencing, system monitoring and control, and a wide range of other functions. PMICs can be used in a variety of applications, ranging from low-power portable devices to large enterprise servers.

As part of the PMIC family, Supervisors are used to protect electronic systems from potentially damaging amplitude, voltage and timing transients. Supervisory ICs can provide system reset; brown-out reset; windowed watchdogs; power-on reset; start-up sequencing; and low dropout regulator control, quite often in a single integrated circuit.

The MIC809RYC3 from TT Electronics is a single-channel sot23-5 supervisor with Reset, REn, and WDI pins. The MIC809RYC3 has a reset threshold of 2.92V with a reset cycle of 200ms. The device is configured to provide a fixed delay of 200ms after power-on reset (POR), and a reset low-pulse duration of 10ms.

The MIC809RYC3 is a low-power, single-channel supervisor IC that is well-suited for use in a variety of applications. It is ideal for use in portable battery-powered devices, industrial and medical equipment, and other small- or medium-power systems where comprehensive reset protection is needed.

Rising outputs are provided with open-drain n-channel MOSFETs, allowing for an active-low logic output with a pull-up resistor. The pull-up voltage must meet the minimum POR-reset positive supply level of 3V.

The MIC809RYC3 provides system power supply monitoring and reset, as well as brown-out detection. When the voltage across the voltage supply pins drops below the threshold voltage, the device will assert its reset output, REn. REn is active low, meaning that it is driven low when activated.

The reset function can be enabled or disabled throught the Window Watchdog input (WDI). When the WDI input is driven low, the device will assert its reset low output. This is useful in systems where the system needs to be reset when it encounters an unattended error condition.

The MIC809RYC3 is also able to monitor a system’s power status without continuous use of the reset output. This reduces current consumption when the reset output is not asserted.

The MIC809RYC3 also features thermal shutdown protection, which is triggered when the die temperature exceeds a predetermined temperature limit. When this happens, the device shuts down, preventing damage to the system due to excessive temperature.

In summary, the MIC809RYC3 is a low-power, single-channel supervisor IC that is well-suited for use in a variety of applications. It is ideal for use in portable battery-powered devices, industrial and medical equipment, and other small- or medium-power systems where comprehensive reset protection is needed. It provides system power supply monitoring and reset, as well as brown-out detection, and also features thermal shutdown protection to prevent system damage due to excessive temperature.

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