VRE310BS

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The VRE310BS, a voltage reference PMIC (power management integrated circuit), is designed as an analog alternative to a linear regulator. It uses a low-cost, high-frequency chopper technique that provides a stable output voltage over a wide input voltage range and operating temperature range.

The VRE310BS also allows the application of an adjustable output voltage by means of an external resistor divider network. With its 0.5% initial accuracy, the VRE310BS offers a reliable, low-dropout, cost-effective power solution.

The VRE310BS is designed for use in a variety of applications such as voltage converters, motor controllers, power-factor correction, switching regulators, voltage multipliers and many other power-related applications.

The main features of the VRE310BS are:

1. High accuracy: 0.5% initial accuracy (maximum) and 0.2%/V deviation from set value.
2. Wide input voltage range: 4.750V to 12.747V.
3. Wide operating temperature range: -55 to 125^oC.
4. Low power consumption: typically 10mW (without load).
5. Low dropout:Typically 250mV@50mA.
6. Under-voltage lockout (UVLO): Starting at 5.0V VIN.
7. Over-current protection (OCP):adjustable current limit.

The working principle of the VRE310BS is based on a really simple concept. It has an internal voltage reference and an error amplifier, which is used to compare the output voltage to the reference voltage. Once the measured voltage is within the specified range, the output remains stable. When the measured voltage rises above the upper limit, the error amplifier will decrease the duty cycle of the device, so as to make the output voltage decrease. Similarly, when the measured voltage falls below the lower limit, the error amplifier will increase the duty cycle so as to increase the output voltage.

The main components of the VRE310BS include an inductor, a series P-channel MOSFET (metal-oxide semiconductor field-effect transistor), and a low-side N-channel MOSFET. The inductor serves as a filter, as well as a recharging device between successive pulses. The P-channel MOSFET conducts during each filtering cycle with the peak current defined by an external resistor connected to the FB pin. During filtering, the output capacitor is replenished through the P-channel MOSFET, resulting in an output voltage that is stable regardless of changes in the input voltage.

The VRE310BS is used in a variety of applications due to its small footprint, low power consumption, and high accuracy. Some of its most common applications include automotive systems, computer peripheral equipment, consumer electronics, embedded systems, and telecommunications.

In conclusion, the VRE310BS is a voltage reference PMIC, designed for use in a variety of applications due to its low-cost, high-frequency chopper technique that provides a stable output voltage over a wide input voltage range and operating temperature range. Its features include high accuracy, wide input voltage range, wide operating temperature range, low power consumption, low-dropout, and under-voltage lockout. Its working principle relies on an internal voltage reference and error amplifier, and components such as an inductor, a series P-channel MOSFET, and a low-side N-channel MOSFET.

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