APX803L-33SA-7

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The APX803L-33SA-7 is a PMIC - Supervisors designed by Apex Microtechnology. With its integrated functions, it is a highly reliable integrated circuit for monitoring the voltage levels of 3.3 V systems. This high performance IC has an adjustable reset output that ensures the active supply is maintained within pre-set upper and lower limits. Other features include voltage spike protection, power-on reset, manual reset, Brown-out reset and programmable manual reset/operation modes.

The APX803L-33SA-7 is mainly used in 3.3 V systems such as cellular phones, personal digital assistants, digital audio players, and portable media players. This PMIC chip provides a reset output when the system voltage reaches the predetermined upper and lower settings. This output is then used to reset the internal circuitry or the whole system depending on the application. This feature prevents overcurrent and voltage spikes due to incorrect power supply settings. The reliable reset output also prevents malfunctions due to incorrect data settings.

The device also comes with various programmable reset/operation modes. These modes are important in applications where the power supply can vary over time. The manual reset function allows the user to put the system in reset mode just by pressing the reset switch. The manual operation mode allows the user to manually change the system operations like its frequency, voltage settings etc. In addition, the APX803L-33SA-7 also features an over-voltage protection circuit incorporated to make sure that the system voltage does not exceed the predetermined maximum level.

The power-on-reset feature enables the system to automatically reset when the power is turned on. This prevents malfunction due to the incorrect application code. The brown-out reset is designed to protect the system from power failure or system crashes due to inadequate power supply. All these features make APX803L-33SA-7 an ideal choice for 3.3 V systems.

The APX803L-33SA-7 is designed for minimal power consumption, with a supply current of typically 5 microamps. The device comes in a small 4-pin SOT23 package and it operates over ambient temperatures from -40 to +85C. Its applications include notebook computers, eBooks, digital cameras and printers.

In summary, the APX803L-33SA-7 is a well-integrated PMIC - Supervisors chip designed to keep the internal circuitry or the whole system within pre-set upper and lower limits. It features various programmable reset/operation modes, manual reset and power-on reset as well as over-voltage protection. With its small size and low power consumption, the APX803L-33SA-7 is an ideal choice for 3.3 V systems.

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