APX803L-31SA-7

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APX803L-31SA-7 is a system PMIC (power management integrated circuit) used in many applications as a low voltage supervisor. It monitors the voltage level of a secure supply and generates a reset signal when it drops below a predetermined threshold. This ensures that the system does not enter an unstable state or malfunction due to an under-voltage situation. This part, along with many variants, is a popular choice for embedded applications such as those in the automotive, industrial and consumer electronic markets.

The APX803 is a simple three-state voltage supervisor, consisting of an enable, voltage reference, a comparator, and reset/monitor output stages. When the input voltage is above preset threshold, it will output a High level which indicates the enabled state. In contrast, when the input voltage drops below the preset threshold and a reset signal is asserted. This reset signal will disable the system and resetting it brings the output back to a low state.

An application example for the APX803 is a system power monitor, with a voltage supervisor used to monitor the input supply voltage. A set of switches, resistors and capacitors can be used to set the power on/off control logic and the voltage supervisor is configured to take the same logic inputs. When the voltage reference within the supervisor drops below the voltage threshold, it will assert a low reset signal. This reset signal is then used to turn off the power switch to protect the system from an under-voltage condition.

In addition to its simple voltage supervisor application, the APX803 has a wide range of features that can be used in a variety of ways. The reset output can be used to reset ASICs or FPGAs and the built-in reset delay can help prevent false reset events due to temporary voltage dips. The APX803 can also be used in Reset or Signal Holdrout applications. The reset output can be used to keep the system in reset until the supply voltage has stabilized.

The APX803L-31SA-7 is a low voltage supervisor IC with a very low operating current of 4µA, making it an ideal choice for portable applications. It also has an impressive 400mV voltage drop-out threshold and can support input voltages up to 18V. This voltage supervisor is the perfect solution for applications requiring low power consumption and precise monitoring of low voltage supplies.

In summary, the APX803L-31SA-7 is a very versatile and low-power voltage supervisor IC. It is ideal for many applications requiring reliable power monitoring and reset functionality, including embedded systems in automotive, industrial and consumer product markets. In addition to its voltage supervisor function, it provides a reset output and reset delay to help protect the system and ensure correct operation in low voltage situations.

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