MB39C031WQN-G-121-JNEFE1

PMIC - Voltage Regulators - Linear + Switching

MB39C031WQN-G-121-JNEFE1

Application Field and Working Principle

The MB39C031WQN-G-121-JNEFE1 is a linear and switching voltage regulator intended for use in consumer electronic applications such as digital cameras, digital set-top boxes, and wireless communication devices. The regulator provides a regulated 5V output at up to 100 mA, with an on-chip power transistors in series or parallel configurations. The part requires minimum external components for the power conversion process.

The regulator has a wide operating temperature range from -40°C to +105°C and features low external power dissipation, high voltage accuracy, very low output voltage noise, a low profile package, and long-term stability. Additionally, features like power-on reset and over-temperature protection make the device a good choice in high-end consumer applications that require reliability and system reliability.

The working principle for the MB39C031WQN-G-121-JNEFE1 involves a linear and switching power topology. For the linear portion of the device, the current regulator is made up of two transistors and two resistors. As voltage is applied to the gate of the upper power transistor, the gate-source voltage increases, which thus increases the drain current, resulting in increased voltage and current regulation. For the switching portion, an oscillator is used to create on-off pulses to the gate of the lower power transistor, thus creating two modes of operation, normal mode and PFC mode.

In normal mode, the oscillator is disabled and the upper power transistor is enabled to convert the input voltage to the regulated output voltage. In PFC mode, the oscillator is enabled and the upper power transistor is disabled, thus allowing the current to flow in a continuous circuit. This mode reduces the ripple components in the output voltage, resulting in improved efficiency and stability.

The MB39C031WQN-G-121-JNEFE1 is a convenient and reliable solution for consumer applications that require a linear and switching voltage regulator. The wide operating temperature range, low external power dissipation, high voltage accuracy, and low output voltage noise are ideal for these applications. Additionally, the device’s built-in power-on reset and over-temperature protection feature provide additional reliability and system reliability.

The device is packaged in a small VQFN package, making it suitable for space-constrained applications such as digital cameras and digital set-top boxes. Moreover, the long-term stability of the regulator, high durability, and low ESR performance further enhance its desirability in high-end consumer products.