MB39C031WQN-G-112-JNEFE1

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The MB39C031WQN-G-112-JNEFE1 is classified as a voltage regulator from the PMIC - Voltage Regulators - Linear + Switching family. It is a regulator IC that is generally used for providing linear regulation and voltage conversion. This device is a 3V regulator including a low-dropout (LDO) linear regulator, an integrated low-side switch, and a programmable burst-mode control incorporated into a single, power-saving IC.

Application Field

The MB39C031WQN-G-112-JNEFE1 is designed to reduce power consumption and extend battery life of small and medium mobile communication applications such as cell phones, PDAs and other digital devices.

This IC is typically used for providing a supply voltage from a Li-Ion battery to small, portable devices. It is also useful for getting a stable and precise voltage from the battery, even under fluctuating conditions. The device is able to provide output voltages of between 0V to 3.75V, and can operate over a wide input range from 3V to 5.75V.

The MB39C031WQN-G-112-JNEFE1’s integrated low-side switch is able to control one component of the power circuit (e.g. the power supply for panel backlighting) on/off. It is also capable of controlling voltage step-up converters and reversing the direction of charge in charge pumps.

This device also has many features that are beneficial for portable applications, such as fast current limiting, onboard delay time setting and soft start control. The current limit is adjustable depending on the load, while the soft start function helps to prevent overloading on startup.

Working Principle

The MB39C031WQN-G-112-JNEFE1 consists of three components: an LDO linear regulator, an integrated low-side switch and a programmable burst-mode control.

The LDO linear regulator is the main component of the IC, and its main operation is to provide a stable output voltage from an varying input voltage from the battery. This is done through the feedback mechanism, in which the output voltage, compared to the reference voltage, is regulated and then returned to the error amplifier for adjustment. The feedback mechanism helps to keep the output constant even when the input voltage fluctuates.

The low-side switch consists of an internal NMOSFET. It is generally used to control the power supply of several components in the power circuit, such as the panel backlighting. When the switch is turned on, it will provide the required voltage for the components.

The burst-mode control is the third component of the IC, and it is designed to reduce the overall power consumption. This mode is active when the output voltage is lower than a certain voltage level, and it will reduce the power consumption by automatically switching off the regulator whenever the output voltage is no longer needed.

Therefore, it can be seen that the MB39C031WQN-G-112-JNEFE1 provides efficient and reliable power delivery from Li-Ion batteries to small portable devices, as well as efficient power control for components in the power circuit. The low power consumption and fast current limiting makes this device ideal for use in power savings applications.

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