AP3988MTR-G1 Integrated Circuits (ICs)

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Power Management Integrated circuits (PMICs) are devices used to provide power to various electronic devices along with the power management functions required for such systems. The PMICs provide key features such as power density, system cost reduction, and improved reliability. Most PMICs are integrated devices that combine a number of load-side functions such as AC and DC converters, offline switchers, voltage regulators and low dropout (LDO) regulators in a single device. The AC/DC converters are designed to convert AC mains power into regulated DC voltages that are suitable for powering electronics devices. Offline switchers are used to shut down the primary side and switch the input power source to a backup source when the power fails or the system activates a low power mode. The voltage regulators keep a stable voltage output even when the input voltage fluctuates and the LDO regulators are used to provide very low dropout control at the point of load to further increase the system’s efficiency.

AP3988MTR-G1 Application Field and working principle

AP3988MTR-G1 is an Integrated Power Management IC (PMIC) designed for low power applications. It provides low power consumption, high efficiency, and excellent power supply performance. The device integrates AC/DC converters, offline switchers, and protection functions required for powering low power electronics devices. It comes in a RoHS compliant 8-pin WLCSP and provides extended temperature operation from -40°C to +85°C.

AP3988MTR-G1 is suitable for application in products that operate through a wide input voltage range, such as wearable and portable devices, e-gadgets, hand-held electronics, and battery-powered audio equipment. The device operates over a wide input voltage range of 4.5V to 28V, providing an output voltage of up to 20V. The device has a low quiescent current of <25µA, allowing it to meet the requirements of low power applications.

AP3988MTR-G1 integrates a high-efficiency boost converter, capable of providing up to 20V of output voltage from an input voltage of 4.5V to 28V. The device also includes an adjustable voltage LDO, which enables the system to be configured to provide up to 17V output voltage from a 3.3V supply. The boost converter and the LDO are both protected from over/under voltage and over/under current conditions. Additionally, the device also provides a power-fail monitoring output (PFOUT) to indicate when the power fails.

The device also integrates a rail-to-rail N-MOSFET switch (SL1), which enables the system to be configured to operate in either diode-OR or diode-AND mode in order to select the appropriate power source. In the diode-OR mode, a backup battery is connected to the system while in the diode-AND mode, both the AC adaptor and battery are connected in parallel. This helps in providing a reliable power source while maintaining a low quiescent current.

Apart from the N-MOSFET switch, the device also provides protection features such as a thermal shutdown, overtemperature protection, reverse current protection, and an overvoltage protection. All these features help to improve the reliability of the system and prevent damage to the components due to an unexpected power failure or other fault conditions.

To sum up, AP3988MTR-G1 is an integrated power management IC designed for low power applications. It integrates AC/DC converters, offline switchers, voltage regulators, and protection features in a single device. The device provides good power efficiency and excellent protection functions for powering low-power electronics devices. It is therefore ideal for wearable, portable and hand-held devices, as well as battery-powered audio equipment.

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