AP3503EMPTR-G1 Integrated Circuits (ICs)

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PMIC (power management integrated circuit) is a type of integrated circuit used to manage power for electronic devices, and one of its divisions, DC DC switching regulators, is designed to convert a given input voltage to a desired output voltage. The AP3503EMPTR-G1 is an example of such a regulator.

The AP3503EMPTR-G1 is a buck-boost switching regulator with a high level of integration and flexibility. It offers adjustable output voltage from 2V to 5V with a VOUTR PG voltage accuracy of 0.9V-2V and VOUTR NG accuracy of 0.6V-1.8V. The switching frequency is three preset options available: 1.8MHz, 2.25MHz, and 3.2MHz.

It is an ideal solution for applications such as wireless charging, automotive wireless headphones, and wireless speakers. The AP3503EMPTR-G1 also features two thermal protection settings (over-temperature and over-current), enabling advanced thermal protection when driving large power loads. Its 59mV/A current sensing and 6.2V OVP voltage monitoring provide comprehensive protection for the system. The internal clock and precise on/off control make it suitable for synchronous rectification applications.

Besides, there are other important features, such as low startup current, logic and PWM dimming control, soft start, and adjustable loop gain and compensation, to customize the converter’s performance to suit a wide range of different designs and applications.

The AP3503EMPTR-G1 device relies upon a fixed-frequency, current-mode control to regulate its output voltage. It corrects its output voltage by comparing the error amplifier\'s output with the current-sense signal. Voltage mode control is then used to keep the output voltage within a certain threshold. With current-mode control, the operating frequency remains constant, regardless of the power load.

The AP3503EMPTR-G1 has integrated MOSFETs, allowing it to operate from an input voltage range of 4.5V to 40V. The output voltage is feedback to a non-inverting input of an error amplifier, and the inverted inputs are connected to a pulse width modulation (PWM). The output voltage is regulated by adjusting the duty cycle of the PWM wave.

In brief, the AP3503EMPTR-G1 is a high-performance buck-boost switching regulator that offers adjustable output voltage, high efficiency, load current sensing, and voltage protection. It enables advanced protection against over-temperature and over-current, as well as synchronous rectification and flexible load current sensing. With its comprehensive features, the AP3503EMPTR-G1 is suitable for a variety of applications such as automotive, industrial, and consumer electronics.

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