BP5310A

1. Introduction

The BP5310A is a special-purpose, high-precision, low-noise voltage regulator designed for a number of power management applications, such as automotive and mobile devices, in which low-power control current is essential. The device combines a high output voltage accuracy, low drop-out voltage, and noise cancellation features in an ultra-low power package.

2. Application Field

The BP5310A voltage regulator is typically used to provide a constant regulated voltage output, while rejecting any load current and voltage changes. This application can be found in many medical, industrial, and automotive systems, where low operating current and high accuracy are required.In automotive applications, such as CAN, Start-Stop, and engine management systems, the BP5310A provides a stable voltage, minimizing the effect of load changes, andimproving system reliability. The device is also suitable for other applications, such as notebook computers, power supplies, and industrial equipment.

3. Working Principle

The BP5310A is a low-noise, high-accuracy voltage regulator. The device utilizes a three-terminal architecture, consisting of reference, control (VIN), and output pins. The reference voltage is set by an external voltage divider tailoredto the desired output voltage level. The BP5310A features a current mirror that tracks the currentthrough the voltage divider. This currentmirror is used to set the output voltage level via a precision line driver to a dedicated N-channelMOSFET integrated into the device.The BP5310A is designed to operate from a wide input voltage range from 2V to 24V. The output voltage is accurate to ±1% over the temperature from -40°C to +125°C. The output voltage remains constant even when the load current changes, with a maximum drop-out voltage of 250mV.Additionally, the voltage regulator features noise cancellation technologies for low-noise applications. The device includes an external inductor that eliminates switching noise andout-of-band emissions. The BP5310A is also equipped with advanced EMI filters and soft-shutdown capabilities that provide an output voltage slew rate of 0.5V/ms. The device is rated to deliver 10mAmaximum output current with a maximum power rating of 200mW.

4. Conclusion

The BP5310A is a special-purpose, high-precision, low-noise voltage regulator designed for a variety of power management applications. The device offers a wide input voltage range from 2V to 24V with a low drop-out voltage of 250mV and high output voltage accuracy of ±1%. The voltage regulator also features noise cancellation technologies and EMI filters for low-noise operation. The device is suitable for automotive, mobile, and industrial systems where low operating current and high accuracy are required.

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