UC28025N

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UC28025N is an all-in-one solutions, DC-DC controller from Torex Semiconductor Ltd, specifically designed for use in a wide range of moderately complex and cost-sensitive applications. This highly integrated device is the industry’s smallest, lowest power, and most reliable DC-DC controller solution.

Being a part of the PMIC - Voltage Regulators - DC DC Switching Controllers family, UC28025N is specifically designed to provide a wide range of features that allow it to be used in many different applications. UC28025N is optimized for small form factor and low cost, but also contain features such as low switching noise and excellent transient response, high operating frequency, high current capability and a high efficiency DC-DC controller for 1.2V-5.5V and up to 8A output current.

The key feature of the UC28025N is its vast operating range, making it ideal for high power system designs, such as telecommunication power supplies, industrial power supplies, server and desktop PC supplies, automotive aftermarket products and consumer electronics applications. As this device is designed to be used in highly regulated and protected applications, it provides a good balance between cost and performance and is also suitable for applications which require high accuracy and repeatability.

UC28025N utilizes an integrated PWM and linear controller to provide regulation of the output voltage. The PWM or linear controller can be selected via the integrated configuration registers during the system start-up and the control model is dependent on the output voltage requirements. This device allows for fast dynamic response and very good transient response due to its fast response time.

The PWM controller provides an ON/OFF control of the output voltage, depending on the input and output voltages. In PWM mode, the device regulates the output voltage by changing the duty cycle of the current switched. The linear controller is used for regulating output voltage by changing the input voltage. This kind of control reduces switching losses and improves system efficiency.

The UC28025N also features an integrated soft-start circuit which automatically adjusts the output voltage to ensure a smooth start up and prevent inrush current, which can be damaging for sensitive components in the system. Additionally, the device contains an integrated overvoltage protection circuit to prevent overvoltage damage when the input power source is too high.

Aside from the PWM and linear control, the UC28025N also has a variety of other features. It has an adjustable transition between linear and PWM control, as well as an adjustable compensation filter for improved transient response. The device also contains an integrated current limit circuit and over temperature protection, and can support a wide range of communication protocols such as SMBus and I2C. Lastly, it has an adjustable soft-start time to provide an optimal start up of the system.

In conclusion, the UC28025N is an ideal low cost, high efficiency solution for various types of applications. Its vast operating range, integrated protection and communication protocols, and excellent transient response make it ideal for applications which need high accuracy and repeatability. With its small form factor and low power consumption, the UC28025N is the perfect choice for highly regulated and protected DC-DC switching application.

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